Web Evidence MCP

Verifies factual claims against current web sources and returns structured, cited results with source provenance, snapshots, and hashes.

Endpoint and access

No sign-in to connect and list tools. Individual tools may still need a vendor account, credentials, or permissions; check the documented prerequisites.

Community listingStreamable HTTPNo sign-inEndpoint checked 2026-11-07Published by aisoup

MCP endpoint (Streamable HTTP)

https://api.aisoup.net/web-evidence/mcp

Vendor documentation

What its tools do

5 tools, grouped by the hints the server advertises. Hints are self-declared, not verified behavior.

Read-only (1)

list_verification_tiers

5 of 5 have a description · 5 of 5 declare behavior hints · 4 of 4 with parameters document them all

Checks and signals

Each line is separate evidence, not a trust score.

Passed Endpoint answered the live check · Nov 7, 2026, 12:59 PM UTC
Availability 1 of 1 checks passed in 30 days

What you can do with it

Verify factual statements against web sources
Retrieve cited sources and snapshots
Check source provenance and hashes

Source and maintenance

Community listingRegistry 0.3.1

mcp-registry: io.github.impanyu/web-evidence@0.3.1 Source repository Project website

Maintenance checked: Nov 7, 2026, 12:25 PM UTC

Protocol and capabilities

Server: web-evidence 0.3.1
MCP protocol negotiated in check: 2025-11-25
Tools: 5 advertised
Resources: Not advertised
Resource templates: Not advertised
Prompts: Not advertised

Server-advertised capabilities

{
  "tools": {
    "listChanged": true
  }
}

Tools

5 advertised

list_verification_tiers — List verification tiers

Advertised by the server during the last successful anonymous check.

Advertised read-only

List Web Evidence verification tools, prices, and research limits. This tool is free.

list_verification_tiers input schema

{
  "type": "object",
  "properties": {}
}

list_verification_tiers output schema

{
  "type": "object",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "required": [
    "tiers"
  ],
  "properties": {
    "tiers": {
      "type": "array",
      "items": {
        "type": "object",
        "required": [
          "tool",
          "priceUsd",
          "maxSources",
          "summary"
        ],
        "properties": {
          "tool": {
            "type": "string",
            "description": "MCP tool name for this verification tier."
          },
          "summary": {
            "type": "string",
            "description": "Human-readable tier capabilities."
          },
          "priceUsd": {
            "type": "string",
            "description": "Per-call price in US dollars."
          },
          "maxSources": {
            "type": "integer",
            "description": "Maximum evidence sources available in this tier."
          }
        },
        "additionalProperties": false
      }
    }
  },
  "additionalProperties": false
}

list_verification_tiers annotations

{
  "readOnlyHint": true,
  "openWorldHint": false,
  "idempotentHint": true,
  "destructiveHint": false
}

verify_claim_quick — Verify claim (quick)

Advertised by the server during the last successful anonymous check.

Open-world

Quick verification for a narrow claim using up to 3 cited sources. Costs $0.02 USDC on Base per call.

verify_claim_quick input schema

{
  "type": "object",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "required": [
    "claim"
  ],
  "properties": {
    "asOf": {
      "type": "string",
      "description": "Optional YYYY-MM-DD date at which the claim should be evaluated."
    },
    "claim": {
      "type": "string",
      "maxLength": 4000,
      "minLength": 3,
      "description": "The factual claim to verify."
    },
    "language": {
      "type": "string",
      "maxLength": 35,
      "minLength": 2,
      "description": "Preferred response language or auto for automatic selection. Defaults to auto."
    },
    "maxSources": {
      "type": "integer",
      "maximum": 20,
      "minimum": 1,
      "description": "Maximum number of evidence sources to return, capped by the selected verification tier."
    },
    "jurisdiction": {
      "type": "string",
      "maxLength": 100,
      "description": "Optional country, state, or legal jurisdiction that should frame the verification."
    },
    "sourcePolicy": {
      "enum": [
        "official_only",
        "authoritative",
        "open_web"
      ],
      "type": "string",
      "description": "Source selection policy. Defaults to authoritative; official_only requires allowedDomains."
    },
    "allowedDomains": {
      "type": "array",
      "items": {
        "type": "string"
      },
      "maxItems": 100,
      "description": "Optional hostname allowlist without schemes or paths, for example openai.com."
    },
    "blockedDomains": {
      "type": "array",
      "items": {
        "type": "string"
      },
      "maxItems": 100,
      "description": "Optional hostname blocklist without schemes or paths."
    },
    "freshnessHours": {
      "type": "integer",
      "maximum": 8760,
      "minimum": 1,
      "description": "Maximum preferred source age in hours. Defaults to 168 hours."
    },
    "minimumSources": {
      "type": "integer",
      "maximum": 10,
      "minimum": 1,
      "description": "Minimum number of sources requested. Defaults to 2 and cannot exceed maxSources."
    },
    "includeConflicts": {
      "type": "boolean",
      "description": "Whether to search for and report conflicting evidence. Defaults to true."
    }
  },
  "additionalProperties": false
}

verify_claim_quick output schema

{
  "type": "object",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "required": [
    "verificationId",
    "claim",
    "status",
    "observedAt",
    "conclusion",
    "atomicFacts",
    "providerSources",
    "evidence",
    "snapshots",
    "conflicts",
    "limitations",
    "provenance",
    "commerce"
  ],
  "properties": {
    "claim": {
      "type": "string"
    },
    "status": {
      "enum": [
        "confirmed",
        "partially_confirmed",
        "contradicted",
        "insufficient_evidence",
        "ambiguous"
      ],
      "type": "string"
    },
    "commerce": {
      "type": "object",
      "required": [
        "orderId",
        "orderToken",
        "receiptId",
        "orderUrl"
      ],
      "properties": {
        "orderId": {
          "type": "string"
        },
        "orderUrl": {
          "type": "string",
          "format": "uri"
        },
        "receiptId": {
          "type": [
            "string",
            "null"
          ]
        },
        "orderToken": {
          "type": "string"
        }
      },
      "additionalProperties": false
    },
    "evidence": {
      "type": "array",
      "items": {
        "type": "object",
        "required": [
          "id",
          "url",
          "title",
          "publisher",
          "publishedAt",
          "retrievedAt",
          "excerpt",
          "relationship",
          "sourceType",
          "qualityReason",
          "providerSourceMatched",
          "cited",
          "snapshotId",
          "consulted",
          "snapshotted"
        ],
        "properties": {
          "id": {
            "type": "string"
          },
          "url": {
            "type": "string",
            "format": "uri"
          },
          "cited": {
            "type": "boolean"
          },
          "title": {
            "type": "string"
          },
          "excerpt": {
            "type": "string"
          },
          "consulted": {
            "type": "boolean"
          },
          "publisher": {
            "type": "string"
          },
          "snapshotId": {
            "type": [
              "string",
              "null"
            ]
          },
          "sourceType": {
            "type": "string"
          },
          "publishedAt": {
            "type": [
              "string",
              "null"
            ]
          },
          "retrievedAt": {
            "type": "string",
            "format": "date-time"
          },
          "snapshotted": {
            "type": "boolean"
          },
          "relationship": {
            "enum": [
              "supports",
              "contradicts",
              "context"
            ],
            "type": "string"
          },
          "qualityReason": {
            "type": "string"
          },
          "providerSourceMatched": {
            "type": "boolean"
          }
        },
        "additionalProperties": false
      }
    },
    "conflicts": {
      "type": "array",
      "items": {
        "type": "object",
        "required": [
          "summary",
          "evidenceIds"
        ],
        "properties": {
          "summary": {
            "type": "string"
          },
          "evidenceIds": {
            "type": "array",
            "items": {
              "type": "string"
            }
          }
        },
        "additionalProperties": false
      }
    },
    "snapshots": {
      "type": "array",
      "items": {
        "type": "object",
        "required": [
          "snapshotId",
          "requestedUrl",
          "finalUrl",
          "retrievedAt",
          "status",
          "httpStatus",
          "contentType",
          "contentLength",
          "rawSha256",
          "normalizedSha256",
          "failureReason"
        ],
        "properties": {
          "status": {
            "enum": [
              "captured",
              "failed",
              "blocked",
              "too_large",
              "unsupported"
            ],
            "type": "string"
          },
          "finalUrl": {
            "anyOf": [
              {
                "type": "string",
                "format": "uri"
              },
              {
                "type": "null"
              }
            ]
          },
          "rawSha256": {
            "type": [
              "string",
              "null"
            ]
          },
          "httpStatus": {
            "anyOf": [
              {
                "type": "integer"
              },
              {
                "type": "null"
              }
            ]
          },
          "snapshotId": {
            "type": "string"
          },
          "contentType": {
            "type": [
              "string",
              "null"
            ]
          },
          "retrievedAt": {
            "type": "string",
            "format": "date-time"
          },
          "requestedUrl": {
            "type": "string",
            "format": "uri"
          },
          "contentLength": {
            "anyOf": [
              {
                "type": "integer"
              },
              {
                "type": "null"
              }
            ]
          },
          "failureReason": {
            "type": [
              "string",
              "null"
            ]
          },
          "normalizedSha256": {
            "type": [
              "string",
              "null"
            ]
          }
        },
        "additionalProperties": false
      }
    },
    "conclusion": {
      "type": "string"
    },
    "observedAt": {
      "type": "string",
      "format": "date-time"
    },
    "provenance": {
      "type": "object",
      "required": [
        "provider",
        "model",
        "providerResponseId",
        "searchedWeb",
        "consultedSourceCount",
        "citedSourceCount",
        "providerSourceCount",
        "matchedEvidenceCount",
        "snapshottedSourceCount",
        "webSearchCallCount",
        "inputTokens",
        "cachedInputTokens",
        "outputTokens",
        "cacheHit"
      ],
      "properties": {
        "model": {
          "type": "string"
        },
        "cacheHit": {
          "type": "boolean"
        },
        "provider": {
          "type": "string"
        },
        "inputTokens": {
          "type": "integer",
          "minimum": 0
        },
        "searchedWeb": {
          "type": "boolean"
        },
        "outputTokens": {
          "type": "integer",
          "minimum": 0
        },
        "citedSourceCount": {
          "type": "integer",
          "minimum": 0
        },
        "cachedInputTokens": {
          "type": "integer",
          "minimum": 0
        },
        "providerResponseId": {
          "type": "string"
        },
        "webSearchCallCount": {
          "type": "integer",
          "minimum": 0
        },
        "providerSourceCount": {
          "type": "integer",
          "minimum": 0
        },
        "consultedSourceCount": {
          "type": "integer",
          "minimum": 0
        },
        "matchedEvidenceCount": {
          "type": "integer",
          "minimum": 0
        },
        "snapshottedSourceCount": {
          "type": "integer",
          "minimum": 0
        }
      },
      "additionalProperties": false
    },
    "atomicFacts": {
      "type": "array",
      "items": {
        "type": "object",
        "required": [
          "statement",
          "status",
          "confidence",
          "explanation",
          "evidenceIds"
        ],
        "properties": {
          "status": {
            "enum": [
              "confirmed",
              "partially_confirmed",
              "contradicted",
              "insufficient_evidence",
              "ambiguous"
            ],
            "type": "string"
          },
          "statement": {
            "type": "string"
          },
          "confidence": {
            "type": "number",
            "maximum": 1,
            "minimum": 0
          },
          "evidenceIds": {
            "type": "array",
            "items": {
              "type": "string"
            }
          },
          "explanation": {
            "type": "string"
          }
        },
        "additionalProperties": false
      }
    },
    "limitations": {
      "type": "array",
      "items": {
        "type": "string"
      }
    },
    "verificationId": {
      "type": "string"
    },
    "providerSources": {
      "type": "array",
      "items": {
        "type": "object",
        "required": [
          "sourceId",
          "url",
          "title",
          "provider",
          "searchCallIds",
          "actions",
          "queries",
          "evidenceIds",
          "cited",
          "snapshotId"
        ],
        "properties": {
          "url": {
            "type": "string",
            "format": "uri"
          },
          "cited": {
            "type": "boolean"
          },
          "title": {
            "type": [
              "string",
              "null"
            ]
          },
          "actions": {
            "type": "array",
            "items": {
              "type": "string"
            }
          },
          "queries": {
            "type": "array",
            "items": {
              "type": "string"
            }
          },
          "provider": {
            "type": "string"
          },
          "sourceId": {
            "type": "string"
          },
          "snapshotId": {
            "type": [
              "string",
              "null"
            ]
          },
          "evidenceIds": {
            "type": "array",
            "items": {
              "type": "string"
            }
          },
          "searchCallIds": {
            "type": "array",
            "items": {
              "type": "string"
            }
          }
        },
        "additionalProperties": false
      }
    }
  },
  "additionalProperties": false
}

verify_claim_quick annotations

{
  "readOnlyHint": false,
  "openWorldHint": true,
  "idempotentHint": false,
  "destructiveHint": false
}

verify_claim — Verify claim

Advertised by the server during the last successful anonymous check.

Open-world

Standard verification with balanced evidence coverage. Costs $0.05 USDC on Base per call.

verify_claim input schema

{
  "type": "object",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "required": [
    "claim"
  ],
  "properties": {
    "asOf": {
      "type": "string",
      "description": "Optional YYYY-MM-DD date at which the claim should be evaluated."
    },
    "claim": {
      "type": "string",
      "maxLength": 4000,
      "minLength": 3,
      "description": "The factual claim to verify."
    },
    "language": {
      "type": "string",
      "maxLength": 35,
      "minLength": 2,
      "description": "Preferred response language or auto for automatic selection. Defaults to auto."
    },
    "maxSources": {
      "type": "integer",
      "maximum": 20,
      "minimum": 1,
      "description": "Maximum number of evidence sources to return, capped by the selected verification tier."
    },
    "jurisdiction": {
      "type": "string",
      "maxLength": 100,
      "description": "Optional country, state, or legal jurisdiction that should frame the verification."
    },
    "sourcePolicy": {
      "enum": [
        "official_only",
        "authoritative",
        "open_web"
      ],
      "type": "string",
      "description": "Source selection policy. Defaults to authoritative; official_only requires allowedDomains."
    },
    "allowedDomains": {
      "type": "array",
      "items": {
        "type": "string"
      },
      "maxItems": 100,
      "description": "Optional hostname allowlist without schemes or paths, for example openai.com."
    },
    "blockedDomains": {
      "type": "array",
      "items": {
        "type": "string"
      },
      "maxItems": 100,
      "description": "Optional hostname blocklist without schemes or paths."
    },
    "freshnessHours": {
      "type": "integer",
      "maximum": 8760,
      "minimum": 1,
      "description": "Maximum preferred source age in hours. Defaults to 168 hours."
    },
    "minimumSources": {
      "type": "integer",
      "maximum": 10,
      "minimum": 1,
      "description": "Minimum number of sources requested. Defaults to 2 and cannot exceed maxSources."
    },
    "includeConflicts": {
      "type": "boolean",
      "description": "Whether to search for and report conflicting evidence. Defaults to true."
    }
  },
  "additionalProperties": false
}

verify_claim output schema

{
  "type": "object",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "required": [
    "verificationId",
    "claim",
    "status",
    "observedAt",
    "conclusion",
    "atomicFacts",
    "providerSources",
    "evidence",
    "snapshots",
    "conflicts",
    "limitations",
    "provenance",
    "commerce"
  ],
  "properties": {
    "claim": {
      "type": "string"
    },
    "status": {
      "enum": [
        "confirmed",
        "partially_confirmed",
        "contradicted",
        "insufficient_evidence",
        "ambiguous"
      ],
      "type": "string"
    },
    "commerce": {
      "type": "object",
      "required": [
        "orderId",
        "orderToken",
        "receiptId",
        "orderUrl"
      ],
      "properties": {
        "orderId": {
          "type": "string"
        },
        "orderUrl": {
          "type": "string",
          "format": "uri"
        },
        "receiptId": {
          "type": [
            "string",
            "null"
          ]
        },
        "orderToken": {
          "type": "string"
        }
      },
      "additionalProperties": false
    },
    "evidence": {
      "type": "array",
      "items": {
        "type": "object",
        "required": [
          "id",
          "url",
          "title",
          "publisher",
          "publishedAt",
          "retrievedAt",
          "excerpt",
          "relationship",
          "sourceType",
          "qualityReason",
          "providerSourceMatched",
          "cited",
          "snapshotId",
          "consulted",
          "snapshotted"
        ],
        "properties": {
          "id": {
            "type": "string"
          },
          "url": {
            "type": "string",
            "format": "uri"
          },
          "cited": {
            "type": "boolean"
          },
          "title": {
            "type": "string"
          },
          "excerpt": {
            "type": "string"
          },
          "consulted": {
            "type": "boolean"
          },
          "publisher": {
            "type": "string"
          },
          "snapshotId": {
            "type": [
              "string",
              "null"
            ]
          },
          "sourceType": {
            "type": "string"
          },
          "publishedAt": {
            "type": [
              "string",
              "null"
            ]
          },
          "retrievedAt": {
            "type": "string",
            "format": "date-time"
          },
          "snapshotted": {
            "type": "boolean"
          },
          "relationship": {
            "enum": [
              "supports",
              "contradicts",
              "context"
            ],
            "type": "string"
          },
          "qualityReason": {
            "type": "string"
          },
          "providerSourceMatched": {
            "type": "boolean"
          }
        },
        "additionalProperties": false
      }
    },
    "conflicts": {
      "type": "array",
      "items": {
        "type": "object",
        "required": [
          "summary",
          "evidenceIds"
        ],
        "properties": {
          "summary": {
            "type": "string"
          },
          "evidenceIds": {
            "type": "array",
            "items": {
              "type": "string"
            }
          }
        },
        "additionalProperties": false
      }
    },
    "snapshots": {
      "type": "array",
      "items": {
        "type": "object",
        "required": [
          "snapshotId",
          "requestedUrl",
          "finalUrl",
          "retrievedAt",
          "status",
          "httpStatus",
          "contentType",
          "contentLength",
          "rawSha256",
          "normalizedSha256",
          "failureReason"
        ],
        "properties": {
          "status": {
            "enum": [
              "captured",
              "failed",
              "blocked",
              "too_large",
              "unsupported"
            ],
            "type": "string"
          },
          "finalUrl": {
            "anyOf": [
              {
                "type": "string",
                "format": "uri"
              },
              {
                "type": "null"
              }
            ]
          },
          "rawSha256": {
            "type": [
              "string",
              "null"
            ]
          },
          "httpStatus": {
            "anyOf": [
              {
                "type": "integer"
              },
              {
                "type": "null"
              }
            ]
          },
          "snapshotId": {
            "type": "string"
          },
          "contentType": {
            "type": [
              "string",
              "null"
            ]
          },
          "retrievedAt": {
            "type": "string",
            "format": "date-time"
          },
          "requestedUrl": {
            "type": "string",
            "format": "uri"
          },
          "contentLength": {
            "anyOf": [
              {
                "type": "integer"
              },
              {
                "type": "null"
              }
            ]
          },
          "failureReason": {
            "type": [
              "string",
              "null"
            ]
          },
          "normalizedSha256": {
            "type": [
              "string",
              "null"
            ]
          }
        },
        "additionalProperties": false
      }
    },
    "conclusion": {
      "type": "string"
    },
    "observedAt": {
      "type": "string",
      "format": "date-time"
    },
    "provenance": {
      "type": "object",
      "required": [
        "provider",
        "model",
        "providerResponseId",
        "searchedWeb",
        "consultedSourceCount",
        "citedSourceCount",
        "providerSourceCount",
        "matchedEvidenceCount",
        "snapshottedSourceCount",
        "webSearchCallCount",
        "inputTokens",
        "cachedInputTokens",
        "outputTokens",
        "cacheHit"
      ],
      "properties": {
        "model": {
          "type": "string"
        },
        "cacheHit": {
          "type": "boolean"
        },
        "provider": {
          "type": "string"
        },
        "inputTokens": {
          "type": "integer",
          "minimum": 0
        },
        "searchedWeb": {
          "type": "boolean"
        },
        "outputTokens": {
          "type": "integer",
          "minimum": 0
        },
        "citedSourceCount": {
          "type": "integer",
          "minimum": 0
        },
        "cachedInputTokens": {
          "type": "integer",
          "minimum": 0
        },
        "providerResponseId": {
          "type": "string"
        },
        "webSearchCallCount": {
          "type": "integer",
          "minimum": 0
        },
        "providerSourceCount": {
          "type": "integer",
          "minimum": 0
        },
        "consultedSourceCount": {
          "type": "integer",
          "minimum": 0
        },
        "matchedEvidenceCount": {
          "type": "integer",
          "minimum": 0
        },
        "snapshottedSourceCount": {
          "type": "integer",
          "minimum": 0
        }
      },
      "additionalProperties": false
    },
    "atomicFacts": {
      "type": "array",
      "items": {
        "type": "object",
        "required": [
          "statement",
          "status",
          "confidence",
          "explanation",
          "evidenceIds"
        ],
        "properties": {
          "status": {
            "enum": [
              "confirmed",
              "partially_confirmed",
              "contradicted",
              "insufficient_evidence",
              "ambiguous"
            ],
            "type": "string"
          },
          "statement": {
            "type": "string"
          },
          "confidence": {
            "type": "number",
            "maximum": 1,
            "minimum": 0
          },
          "evidenceIds": {
            "type": "array",
            "items": {
              "type": "string"
            }
          },
          "explanation": {
            "type": "string"
          }
        },
        "additionalProperties": false
      }
    },
    "limitations": {
      "type": "array",
      "items": {
        "type": "string"
      }
    },
    "verificationId": {
      "type": "string"
    },
    "providerSources": {
      "type": "array",
      "items": {
        "type": "object",
        "required": [
          "sourceId",
          "url",
          "title",
          "provider",
          "searchCallIds",
          "actions",
          "queries",
          "evidenceIds",
          "cited",
          "snapshotId"
        ],
        "properties": {
          "url": {
            "type": "string",
            "format": "uri"
          },
          "cited": {
            "type": "boolean"
          },
          "title": {
            "type": [
              "string",
              "null"
            ]
          },
          "actions": {
            "type": "array",
            "items": {
              "type": "string"
            }
          },
          "queries": {
            "type": "array",
            "items": {
              "type": "string"
            }
          },
          "provider": {
            "type": "string"
          },
          "sourceId": {
            "type": "string"
          },
          "snapshotId": {
            "type": [
              "string",
              "null"
            ]
          },
          "evidenceIds": {
            "type": "array",
            "items": {
              "type": "string"
            }
          },
          "searchCallIds": {
            "type": "array",
            "items": {
              "type": "string"
            }
          }
        },
        "additionalProperties": false
      }
    }
  },
  "additionalProperties": false
}

verify_claim annotations

{
  "readOnlyHint": false,
  "openWorldHint": true,
  "idempotentHint": false,
  "destructiveHint": false
}

verify_claim_deep — Verify claim (deep)

Advertised by the server during the last successful anonymous check.

Open-world

Deep verification for compound or contested claims using up to 15 cited sources. Costs $0.12 USDC on Base per call.

verify_claim_deep input schema

{
  "type": "object",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "required": [
    "claim"
  ],
  "properties": {
    "asOf": {
      "type": "string",
      "description": "Optional YYYY-MM-DD date at which the claim should be evaluated."
    },
    "claim": {
      "type": "string",
      "maxLength": 4000,
      "minLength": 3,
      "description": "The factual claim to verify."
    },
    "language": {
      "type": "string",
      "maxLength": 35,
      "minLength": 2,
      "description": "Preferred response language or auto for automatic selection. Defaults to auto."
    },
    "maxSources": {
      "type": "integer",
      "maximum": 20,
      "minimum": 1,
      "description": "Maximum number of evidence sources to return, capped by the selected verification tier."
    },
    "jurisdiction": {
      "type": "string",
      "maxLength": 100,
      "description": "Optional country, state, or legal jurisdiction that should frame the verification."
    },
    "sourcePolicy": {
      "enum": [
        "official_only",
        "authoritative",
        "open_web"
      ],
      "type": "string",
      "description": "Source selection policy. Defaults to authoritative; official_only requires allowedDomains."
    },
    "allowedDomains": {
      "type": "array",
      "items": {
        "type": "string"
      },
      "maxItems": 100,
      "description": "Optional hostname allowlist without schemes or paths, for example openai.com."
    },
    "blockedDomains": {
      "type": "array",
      "items": {
        "type": "string"
      },
      "maxItems": 100,
      "description": "Optional hostname blocklist without schemes or paths."
    },
    "freshnessHours": {
      "type": "integer",
      "maximum": 8760,
      "minimum": 1,
      "description": "Maximum preferred source age in hours. Defaults to 168 hours."
    },
    "minimumSources": {
      "type": "integer",
      "maximum": 10,
      "minimum": 1,
      "description": "Minimum number of sources requested. Defaults to 2 and cannot exceed maxSources."
    },
    "includeConflicts": {
      "type": "boolean",
      "description": "Whether to search for and report conflicting evidence. Defaults to true."
    }
  },
  "additionalProperties": false
}

verify_claim_deep output schema

{
  "type": "object",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "required": [
    "verificationId",
    "claim",
    "status",
    "observedAt",
    "conclusion",
    "atomicFacts",
    "providerSources",
    "evidence",
    "snapshots",
    "conflicts",
    "limitations",
    "provenance",
    "commerce"
  ],
  "properties": {
    "claim": {
      "type": "string"
    },
    "status": {
      "enum": [
        "confirmed",
        "partially_confirmed",
        "contradicted",
        "insufficient_evidence",
        "ambiguous"
      ],
      "type": "string"
    },
    "commerce": {
      "type": "object",
      "required": [
        "orderId",
        "orderToken",
        "receiptId",
        "orderUrl"
      ],
      "properties": {
        "orderId": {
          "type": "string"
        },
        "orderUrl": {
          "type": "string",
          "format": "uri"
        },
        "receiptId": {
          "type": [
            "string",
            "null"
          ]
        },
        "orderToken": {
          "type": "string"
        }
      },
      "additionalProperties": false
    },
    "evidence": {
      "type": "array",
      "items": {
        "type": "object",
        "required": [
          "id",
          "url",
          "title",
          "publisher",
          "publishedAt",
          "retrievedAt",
          "excerpt",
          "relationship",
          "sourceType",
          "qualityReason",
          "providerSourceMatched",
          "cited",
          "snapshotId",
          "consulted",
          "snapshotted"
        ],
        "properties": {
          "id": {
            "type": "string"
          },
          "url": {
            "type": "string",
            "format": "uri"
          },
          "cited": {
            "type": "boolean"
          },
          "title": {
            "type": "string"
          },
          "excerpt": {
            "type": "string"
          },
          "consulted": {
            "type": "boolean"
          },
          "publisher": {
            "type": "string"
          },
          "snapshotId": {
            "type": [
              "string",
              "null"
            ]
          },
          "sourceType": {
            "type": "string"
          },
          "publishedAt": {
            "type": [
              "string",
              "null"
            ]
          },
          "retrievedAt": {
            "type": "string",
            "format": "date-time"
          },
          "snapshotted": {
            "type": "boolean"
          },
          "relationship": {
            "enum": [
              "supports",
              "contradicts",
              "context"
            ],
            "type": "string"
          },
          "qualityReason": {
            "type": "string"
          },
          "providerSourceMatched": {
            "type": "boolean"
          }
        },
        "additionalProperties": false
      }
    },
    "conflicts": {
      "type": "array",
      "items": {
        "type": "object",
        "required": [
          "summary",
          "evidenceIds"
        ],
        "properties": {
          "summary": {
            "type": "string"
          },
          "evidenceIds": {
            "type": "array",
            "items": {
              "type": "string"
            }
          }
        },
        "additionalProperties": false
      }
    },
    "snapshots": {
      "type": "array",
      "items": {
        "type": "object",
        "required": [
          "snapshotId",
          "requestedUrl",
          "finalUrl",
          "retrievedAt",
          "status",
          "httpStatus",
          "contentType",
          "contentLength",
          "rawSha256",
          "normalizedSha256",
          "failureReason"
        ],
        "properties": {
          "status": {
            "enum": [
              "captured",
              "failed",
              "blocked",
              "too_large",
              "unsupported"
            ],
            "type": "string"
          },
          "finalUrl": {
            "anyOf": [
              {
                "type": "string",
                "format": "uri"
              },
              {
                "type": "null"
              }
            ]
          },
          "rawSha256": {
            "type": [
              "string",
              "null"
            ]
          },
          "httpStatus": {
            "anyOf": [
              {
                "type": "integer"
              },
              {
                "type": "null"
              }
            ]
          },
          "snapshotId": {
            "type": "string"
          },
          "contentType": {
            "type": [
              "string",
              "null"
            ]
          },
          "retrievedAt": {
            "type": "string",
            "format": "date-time"
          },
          "requestedUrl": {
            "type": "string",
            "format": "uri"
          },
          "contentLength": {
            "anyOf": [
              {
                "type": "integer"
              },
              {
                "type": "null"
              }
            ]
          },
          "failureReason": {
            "type": [
              "string",
              "null"
            ]
          },
          "normalizedSha256": {
            "type": [
              "string",
              "null"
            ]
          }
        },
        "additionalProperties": false
      }
    },
    "conclusion": {
      "type": "string"
    },
    "observedAt": {
      "type": "string",
      "format": "date-time"
    },
    "provenance": {
      "type": "object",
      "required": [
        "provider",
        "model",
        "providerResponseId",
        "searchedWeb",
        "consultedSourceCount",
        "citedSourceCount",
        "providerSourceCount",
        "matchedEvidenceCount",
        "snapshottedSourceCount",
        "webSearchCallCount",
        "inputTokens",
        "cachedInputTokens",
        "outputTokens",
        "cacheHit"
      ],
      "properties": {
        "model": {
          "type": "string"
        },
        "cacheHit": {
          "type": "boolean"
        },
        "provider": {
          "type": "string"
        },
        "inputTokens": {
          "type": "integer",
          "minimum": 0
        },
        "searchedWeb": {
          "type": "boolean"
        },
        "outputTokens": {
          "type": "integer",
          "minimum": 0
        },
        "citedSourceCount": {
          "type": "integer",
          "minimum": 0
        },
        "cachedInputTokens": {
          "type": "integer",
          "minimum": 0
        },
        "providerResponseId": {
          "type": "string"
        },
        "webSearchCallCount": {
          "type": "integer",
          "minimum": 0
        },
        "providerSourceCount": {
          "type": "integer",
          "minimum": 0
        },
        "consultedSourceCount": {
          "type": "integer",
          "minimum": 0
        },
        "matchedEvidenceCount": {
          "type": "integer",
          "minimum": 0
        },
        "snapshottedSourceCount": {
          "type": "integer",
          "minimum": 0
        }
      },
      "additionalProperties": false
    },
    "atomicFacts": {
      "type": "array",
      "items": {
        "type": "object",
        "required": [
          "statement",
          "status",
          "confidence",
          "explanation",
          "evidenceIds"
        ],
        "properties": {
          "status": {
            "enum": [
              "confirmed",
              "partially_confirmed",
              "contradicted",
              "insufficient_evidence",
              "ambiguous"
            ],
            "type": "string"
          },
          "statement": {
            "type": "string"
          },
          "confidence": {
            "type": "number",
            "maximum": 1,
            "minimum": 0
          },
          "evidenceIds": {
            "type": "array",
            "items": {
              "type": "string"
            }
          },
          "explanation": {
            "type": "string"
          }
        },
        "additionalProperties": false
      }
    },
    "limitations": {
      "type": "array",
      "items": {
        "type": "string"
      }
    },
    "verificationId": {
      "type": "string"
    },
    "providerSources": {
      "type": "array",
      "items": {
        "type": "object",
        "required": [
          "sourceId",
          "url",
          "title",
          "provider",
          "searchCallIds",
          "actions",
          "queries",
          "evidenceIds",
          "cited",
          "snapshotId"
        ],
        "properties": {
          "url": {
            "type": "string",
            "format": "uri"
          },
          "cited": {
            "type": "boolean"
          },
          "title": {
            "type": [
              "string",
              "null"
            ]
          },
          "actions": {
            "type": "array",
            "items": {
              "type": "string"
            }
          },
          "queries": {
            "type": "array",
            "items": {
              "type": "string"
            }
          },
          "provider": {
            "type": "string"
          },
          "sourceId": {
            "type": "string"
          },
          "snapshotId": {
            "type": [
              "string",
              "null"
            ]
          },
          "evidenceIds": {
            "type": "array",
            "items": {
              "type": "string"
            }
          },
          "searchCallIds": {
            "type": "array",
            "items": {
              "type": "string"
            }
          }
        },
        "additionalProperties": false
      }
    }
  },
  "additionalProperties": false
}

verify_claim_deep annotations

{
  "readOnlyHint": false,
  "openWorldHint": true,
  "idempotentHint": false,
  "destructiveHint": false
}

verify_claim_research — Verify claim (research)

Advertised by the server during the last successful anonymous check.

Open-world

Research-grade verification with the largest search and evidence budget. Costs $0.25 USDC on Base per call.

verify_claim_research input schema

{
  "type": "object",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "required": [
    "claim"
  ],
  "properties": {
    "asOf": {
      "type": "string",
      "description": "Optional YYYY-MM-DD date at which the claim should be evaluated."
    },
    "claim": {
      "type": "string",
      "maxLength": 4000,
      "minLength": 3,
      "description": "The factual claim to verify."
    },
    "language": {
      "type": "string",
      "maxLength": 35,
      "minLength": 2,
      "description": "Preferred response language or auto for automatic selection. Defaults to auto."
    },
    "maxSources": {
      "type": "integer",
      "maximum": 20,
      "minimum": 1,
      "description": "Maximum number of evidence sources to return, capped by the selected verification tier."
    },
    "jurisdiction": {
      "type": "string",
      "maxLength": 100,
      "description": "Optional country, state, or legal jurisdiction that should frame the verification."
    },
    "sourcePolicy": {
      "enum": [
        "official_only",
        "authoritative",
        "open_web"
      ],
      "type": "string",
      "description": "Source selection policy. Defaults to authoritative; official_only requires allowedDomains."
    },
    "allowedDomains": {
      "type": "array",
      "items": {
        "type": "string"
      },
      "maxItems": 100,
      "description": "Optional hostname allowlist without schemes or paths, for example openai.com."
    },
    "blockedDomains": {
      "type": "array",
      "items": {
        "type": "string"
      },
      "maxItems": 100,
      "description": "Optional hostname blocklist without schemes or paths."
    },
    "freshnessHours": {
      "type": "integer",
      "maximum": 8760,
      "minimum": 1,
      "description": "Maximum preferred source age in hours. Defaults to 168 hours."
    },
    "minimumSources": {
      "type": "integer",
      "maximum": 10,
      "minimum": 1,
      "description": "Minimum number of sources requested. Defaults to 2 and cannot exceed maxSources."
    },
    "includeConflicts": {
      "type": "boolean",
      "description": "Whether to search for and report conflicting evidence. Defaults to true."
    }
  },
  "additionalProperties": false
}

verify_claim_research output schema

{
  "type": "object",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "required": [
    "verificationId",
    "claim",
    "status",
    "observedAt",
    "conclusion",
    "atomicFacts",
    "providerSources",
    "evidence",
    "snapshots",
    "conflicts",
    "limitations",
    "provenance",
    "commerce"
  ],
  "properties": {
    "claim": {
      "type": "string"
    },
    "status": {
      "enum": [
        "confirmed",
        "partially_confirmed",
        "contradicted",
        "insufficient_evidence",
        "ambiguous"
      ],
      "type": "string"
    },
    "commerce": {
      "type": "object",
      "required": [
        "orderId",
        "orderToken",
        "receiptId",
        "orderUrl"
      ],
      "properties": {
        "orderId": {
          "type": "string"
        },
        "orderUrl": {
          "type": "string",
          "format": "uri"
        },
        "receiptId": {
          "type": [
            "string",
            "null"
          ]
        },
        "orderToken": {
          "type": "string"
        }
      },
      "additionalProperties": false
    },
    "evidence": {
      "type": "array",
      "items": {
        "type": "object",
        "required": [
          "id",
          "url",
          "title",
          "publisher",
          "publishedAt",
          "retrievedAt",
          "excerpt",
          "relationship",
          "sourceType",
          "qualityReason",
          "providerSourceMatched",
          "cited",
          "snapshotId",
          "consulted",
          "snapshotted"
        ],
        "properties": {
          "id": {
            "type": "string"
          },
          "url": {
            "type": "string",
            "format": "uri"
          },
          "cited": {
            "type": "boolean"
          },
          "title": {
            "type": "string"
          },
          "excerpt": {
            "type": "string"
          },
          "consulted": {
            "type": "boolean"
          },
          "publisher": {
            "type": "string"
          },
          "snapshotId": {
            "type": [
              "string",
              "null"
            ]
          },
          "sourceType": {
            "type": "string"
          },
          "publishedAt": {
            "type": [
              "string",
              "null"
            ]
          },
          "retrievedAt": {
            "type": "string",
            "format": "date-time"
          },
          "snapshotted": {
            "type": "boolean"
          },
          "relationship": {
            "enum": [
              "supports",
              "contradicts",
              "context"
            ],
            "type": "string"
          },
          "qualityReason": {
            "type": "string"
          },
          "providerSourceMatched": {
            "type": "boolean"
          }
        },
        "additionalProperties": false
      }
    },
    "conflicts": {
      "type": "array",
      "items": {
        "type": "object",
        "required": [
          "summary",
          "evidenceIds"
        ],
        "properties": {
          "summary": {
            "type": "string"
          },
          "evidenceIds": {
            "type": "array",
            "items": {
              "type": "string"
            }
          }
        },
        "additionalProperties": false
      }
    },
    "snapshots": {
      "type": "array",
      "items": {
        "type": "object",
        "required": [
          "snapshotId",
          "requestedUrl",
          "finalUrl",
          "retrievedAt",
          "status",
          "httpStatus",
          "contentType",
          "contentLength",
          "rawSha256",
          "normalizedSha256",
          "failureReason"
        ],
        "properties": {
          "status": {
            "enum": [
              "captured",
              "failed",
              "blocked",
              "too_large",
              "unsupported"
            ],
            "type": "string"
          },
          "finalUrl": {
            "anyOf": [
              {
                "type": "string",
                "format": "uri"
              },
              {
                "type": "null"
              }
            ]
          },
          "rawSha256": {
            "type": [
              "string",
              "null"
            ]
          },
          "httpStatus": {
            "anyOf": [
              {
                "type": "integer"
              },
              {
                "type": "null"
              }
            ]
          },
          "snapshotId": {
            "type": "string"
          },
          "contentType": {
            "type": [
              "string",
              "null"
            ]
          },
          "retrievedAt": {
            "type": "string",
            "format": "date-time"
          },
          "requestedUrl": {
            "type": "string",
            "format": "uri"
          },
          "contentLength": {
            "anyOf": [
              {
                "type": "integer"
              },
              {
                "type": "null"
              }
            ]
          },
          "failureReason": {
            "type": [
              "string",
              "null"
            ]
          },
          "normalizedSha256": {
            "type": [
              "string",
              "null"
            ]
          }
        },
        "additionalProperties": false
      }
    },
    "conclusion": {
      "type": "string"
    },
    "observedAt": {
      "type": "string",
      "format": "date-time"
    },
    "provenance": {
      "type": "object",
      "required": [
        "provider",
        "model",
        "providerResponseId",
        "searchedWeb",
        "consultedSourceCount",
        "citedSourceCount",
        "providerSourceCount",
        "matchedEvidenceCount",
        "snapshottedSourceCount",
        "webSearchCallCount",
        "inputTokens",
        "cachedInputTokens",
        "outputTokens",
        "cacheHit"
      ],
      "properties": {
        "model": {
          "type": "string"
        },
        "cacheHit": {
          "type": "boolean"
        },
        "provider": {
          "type": "string"
        },
        "inputTokens": {
          "type": "integer",
          "minimum": 0
        },
        "searchedWeb": {
          "type": "boolean"
        },
        "outputTokens": {
          "type": "integer",
          "minimum": 0
        },
        "citedSourceCount": {
          "type": "integer",
          "minimum": 0
        },
        "cachedInputTokens": {
          "type": "integer",
          "minimum": 0
        },
        "providerResponseId": {
          "type": "string"
        },
        "webSearchCallCount": {
          "type": "integer",
          "minimum": 0
        },
        "providerSourceCount": {
          "type": "integer",
          "minimum": 0
        },
        "consultedSourceCount": {
          "type": "integer",
          "minimum": 0
        },
        "matchedEvidenceCount": {
          "type": "integer",
          "minimum": 0
        },
        "snapshottedSourceCount": {
          "type": "integer",
          "minimum": 0
        }
      },
      "additionalProperties": false
    },
    "atomicFacts": {
      "type": "array",
      "items": {
        "type": "object",
        "required": [
          "statement",
          "status",
          "confidence",
          "explanation",
          "evidenceIds"
        ],
        "properties": {
          "status": {
            "enum": [
              "confirmed",
              "partially_confirmed",
              "contradicted",
              "insufficient_evidence",
              "ambiguous"
            ],
            "type": "string"
          },
          "statement": {
            "type": "string"
          },
          "confidence": {
            "type": "number",
            "maximum": 1,
            "minimum": 0
          },
          "evidenceIds": {
            "type": "array",
            "items": {
              "type": "string"
            }
          },
          "explanation": {
            "type": "string"
          }
        },
        "additionalProperties": false
      }
    },
    "limitations": {
      "type": "array",
      "items": {
        "type": "string"
      }
    },
    "verificationId": {
      "type": "string"
    },
    "providerSources": {
      "type": "array",
      "items": {
        "type": "object",
        "required": [
          "sourceId",
          "url",
          "title",
          "provider",
          "searchCallIds",
          "actions",
          "queries",
          "evidenceIds",
          "cited",
          "snapshotId"
        ],
        "properties": {
          "url": {
            "type": "string",
            "format": "uri"
          },
          "cited": {
            "type": "boolean"
          },
          "title": {
            "type": [
              "string",
              "null"
            ]
          },
          "actions": {
            "type": "array",
            "items": {
              "type": "string"
            }
          },
          "queries": {
            "type": "array",
            "items": {
              "type": "string"
            }
          },
          "provider": {
            "type": "string"
          },
          "sourceId": {
            "type": "string"
          },
          "snapshotId": {
            "type": [
              "string",
              "null"
            ]
          },
          "evidenceIds": {
            "type": "array",
            "items": {
              "type": "string"
            }
          },
          "searchCallIds": {
            "type": "array",
            "items": {
              "type": "string"
            }
          }
        },
        "additionalProperties": false
      }
    }
  },
  "additionalProperties": false
}

verify_claim_research annotations

{
  "readOnlyHint": false,
  "openWorldHint": true,
  "idempotentHint": false,
  "destructiveHint": false
}

Prompts

Not advertised

No prompt definitions available.

Resources

Not advertised

No resource definitions available.

30-day availability

Aggregated from read-only remote checks; this is not a tool-execution or security guarantee.

Successful checks: 1 of 1 (100%)
Average latency: 824 ms
95th percentile latency: 824 ms

Maintenance history

Public check and source-refresh events. Editorial and ownership records remain private.

Nov 7, 2026, 12:59 PM UTC · probe · passed · 824 ms · metadata changed · 5 tool(s)

Connect from your client

Each snippet registers the same endpoint; pick the client you use.

This server is operated by the named third party. Listing and endpoint checks are not an endorsement or a security audit. Review the operator's permissions, terms, and data handling before connecting. How listings are checked and corrected.

Claude Code

Run this once in a terminal. It registers the remote server. Use --scope project to write .mcp.json for the repo.

Claude Code configuration

claude mcp add --transport http web-evidence-mcp https://api.aisoup.net/web-evidence/mcp

Codex

Run this once. Codex stores MCP servers in ~/.codex/config.toml (or .codex/config.toml in a trusted project).

Codex configuration

codex mcp add web-evidence-mcp --url https://api.aisoup.net/web-evidence/mcp

Cursor

Merge this server into .cursor/mcp.json in your project, then enable web-evidence-mcp in your MCP settings.

Cursor configuration

{
  "mcpServers": {
    "web-evidence-mcp": {
      "url": "https://api.aisoup.net/web-evidence/mcp"
    }
  }
}

Cline

Merge this into cline_mcp_settings.json (Cline → MCP Servers → Configure).

Cline configuration

{
  "mcpServers": {
    "web-evidence-mcp": {
      "type": "streamableHttp",
      "url": "https://api.aisoup.net/web-evidence/mcp",
      "disabled": false
    }
  }
}

VS Code

Merge this server into .vscode/mcp.json. Use MCP: List Servers to start web-evidence-mcp and inspect its tools.

VS Code configuration

{
  "servers": {
    "web-evidence-mcp": {
      "type": "http",
      "url": "https://api.aisoup.net/web-evidence/mcp"
    }
  }
}

Gemini CLI

Run this once. It writes .gemini/settings.json in the current project; pass --scope user for ~/.gemini/settings.json.

Gemini CLI configuration

gemini mcp add --transport http web-evidence-mcp https://api.aisoup.net/web-evidence/mcp

Claude Desktop

Open Claude Settings > Connectors > Add custom connector, enter this server URL and enable it for the conversation. This is a manual remote-connector handoff, not a desktop JSON configuration.

Claude Desktop configuration

https://api.aisoup.net/web-evidence/mcp

Windsurf

Merge this into ~/.codeium/windsurf/mcp_config.json, then refresh MCP in Cascade. Windsurf remote servers use serverUrl, not url.

Windsurf configuration

{
  "mcpServers": {
    "web-evidence-mcp": {
      "serverUrl": "https://api.aisoup.net/web-evidence/mcp"
    }
  }
}

Let your agent find its tools

Find servers like Web Evidence MCP from your agent. Add Koskamo once to search the index for endpoints, access requirements, and client setup. Public discovery needs no key.

Connect Koskamo Explore workflows

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Web Evidence MCP

Endpoint and access

What its tools do

Read-only (1)

Can change data (4)

Checks and signals

What you can do with it

Source and maintenance

Protocol and capabilities

Tools

Prompts

Resources

30-day availability

Maintenance history

Connect from your client

Claude Code

Codex

Cursor

Cline

VS Code

Gemini CLI

Claude Desktop

Windsurf

Let your agent find its tools

Other data and analytics servers