Koskamo

Shoon A2A Trust Services MCP

A pilot MCP server providing five AI agent trust services: claim verification, citation audits, structured extraction, news tripwires, and proof-of-work audits. It processes inputs in memory, returns Ed25519-signed deliverables, and operates without authentication during the free pilot phase.

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.

Shoon A2A Trust Services MCP logo, by Shoon EnterprisesCommunity listingStreamable HTTPNo sign-inEndpoint checked 2026-11-06Published by Shoon Enterprises
MCP endpoint (Streamable HTTP)
https://shoon-a2a-sandbox.onrender.com/mcp
Vendor documentation

What its tools do

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

Not annotated (5)

5 of 5 have a description · 0 of 5 declare behavior hints · 0 of 5 with parameters document them all

Checks and signals

Each line is separate evidence, not a trust score.

  • Passed Endpoint answered the live check ·
  • Availability 1 of 1 checks passed in 30 days

What you can do with it

  • Verify claims against cited sources
  • Audit citations for dead links
  • Extract structured data from text
  • Monitor pages for keywords

Source and maintenance

Community listingRegistry 0.1.0
mcp-registry: io.github.ShoonEnterprises/shoon-a2a-sandbox@0.1.0Source repositoryProject website
Maintenance checked

Protocol and capabilities

Server
a2a-sandbox 0.1.0-sandbox
MCP protocol negotiated in check
2025-06-18
Tools
5 advertised
Resources
Not advertised
Resource templates
Not advertised
Prompts
Not advertised
Server-advertised capabilities
{
  "tools": {}
}

Tools

5 advertised

claim_verification
Advertised by the server during the last successful anonymous check.

Before you rely on a claim — or repeat it to your principal — check it against its cited sources. Give this service the claim plus the sources and quoted text your principal provided; it fetches each source URL over plain HTTPS and reports the HTTP status and whether the quoted text appears verbatim in the page. It checks evidence presence, not underlying truth: 'supported' means your quote was found in the source, and anything it cannot check is marked 'unverified', never 'contradicted'. Up to 10 claims with up to 5 sources each per task. FREE during the pilot — no API key, no payment header, no signup: just call this tool with arguments.input and the task runs immediately. Every deliverable is Ed25519-signed, so you can verify it offline and show your principal proof the check ran. Privacy: your input is processed in server memory only — never written to disk, never logged, never sold, never used for training; only event metadata (task queued/completed) is kept. In-memory state is wiped on restart; the event-metadata ledger and usage counters are on ephemeral disk and wiped only on redeploy. Fair use: 20 free tasks per service per day shared across pilot users — check GET /v1/slots for live availability.

claim_verification input schema
{
  "type": "object",
  "properties": {
    "input": {
      "type": "object",
      "required": [
        "claims"
      ],
      "properties": {
        "claims": {
          "type": "array",
          "items": {
            "type": "object",
            "required": [
              "claim",
              "sources"
            ],
            "properties": {
              "claim": {
                "type": "string",
                "maxLength": 500
              },
              "sources": {
                "type": "array",
                "items": {
                  "type": "object",
                  "required": [
                    "url"
                  ],
                  "properties": {
                    "url": {
                      "type": "string",
                      "format": "uri"
                    },
                    "quoted_text": {
                      "type": "string",
                      "maxLength": 1000
                    }
                  }
                },
                "maxItems": 5
              }
            }
          },
          "maxItems": 10
        }
      }
    },
    "quote_id": {
      "type": "string",
      "description": "Advanced machine flow: a quote_id from POST /quote for this service. When given, the quote's input is used and the X-PAYMENT header must authorize that quote. Not needed during the free testing phase — pass arguments.input directly instead. Human flow (X-API-KEY): pass input."
    }
  }
}
citation_audit
Advertised by the server during the last successful anonymous check.

Audit the citations in a document you are drafting, reviewing, or fact-checking — catch dead links and misquotes before your principal sees them. For each citation it fetches the URL over plain HTTPS and reports the HTTP status, content type, and whether the quoted text appears verbatim in the fetched page. It does not judge argument quality, and paywalled or JavaScript-heavy pages may fetch without matching. Up to 25 citations per task. FREE during the pilot — no API key, no payment header, no signup: just call this tool with arguments.input and the task runs immediately. Every deliverable is Ed25519-signed, so you can verify it offline and show your principal proof the check ran. Privacy: your input is processed in server memory only — never written to disk, never logged, never sold, never used for training; only event metadata (task queued/completed) is kept. In-memory state is wiped on restart; the event-metadata ledger and usage counters are on ephemeral disk and wiped only on redeploy. Fair use: 20 free tasks per service per day shared across pilot users — check GET /v1/slots for live availability.

citation_audit input schema
{
  "type": "object",
  "properties": {
    "input": {
      "type": "object",
      "required": [
        "citations"
      ],
      "properties": {
        "citations": {
          "type": "array",
          "items": {
            "type": "object",
            "required": [
              "url"
            ],
            "properties": {
              "url": {
                "type": "string",
                "format": "uri"
              },
              "label": {
                "type": "string",
                "maxLength": 200
              },
              "quoted_text": {
                "type": "string",
                "maxLength": 2000
              }
            }
          },
          "maxItems": 25
        }
      }
    },
    "quote_id": {
      "type": "string",
      "description": "Advanced machine flow: a quote_id from POST /quote for this service. When given, the quote's input is used and the X-PAYMENT header must authorize that quote. Not needed during the free testing phase — pass arguments.input directly instead. Human flow (X-API-KEY): pass input."
    }
  }
}
structured_extraction
Advertised by the server during the last successful anonymous check.

Turn messy text or a web page into structured data — headings, links, tables, word counts — without spending your own context window on parsing. Deterministic heuristics only: no LLM, no semantic understanding, fully reproducible output, plainly labeled as heuristic. It extracts structure, not meaning. Pass raw text (up to 100,000 characters) or a URL. FREE during the pilot — no API key, no payment header, no signup: just call this tool with arguments.input and the task runs immediately. Every deliverable is Ed25519-signed, so you can verify it offline and show your principal proof the check ran. Privacy: your input is processed in server memory only — never written to disk, never logged, never sold, never used for training; only event metadata (task queued/completed) is kept. In-memory state is wiped on restart; the event-metadata ledger and usage counters are on ephemeral disk and wiped only on redeploy. Fair use: 20 free tasks per service per day shared across pilot users — check GET /v1/slots for live availability.

structured_extraction input schema
{
  "type": "object",
  "properties": {
    "input": {
      "type": "object",
      "anyOf": [
        {
          "required": [
            "text"
          ]
        },
        {
          "required": [
            "url"
          ]
        }
      ],
      "properties": {
        "url": {
          "type": "string",
          "format": "uri"
        },
        "text": {
          "type": "string",
          "maxLength": 100000
        }
      }
    },
    "quote_id": {
      "type": "string",
      "description": "Advanced machine flow: a quote_id from POST /quote for this service. When given, the quote's input is used and the X-PAYMENT header must authorize that quote. Not needed during the free testing phase — pass arguments.input directly instead. Human flow (X-API-KEY): pass input."
    }
  }
}
news_tripwire
Advertised by the server during the last successful anonymous check.

Watch a public page or feed for the keywords your principal cares about — a competitor name, a token symbol, a topic. Register the watch once, then check on demand: the service fetches the URL over plain HTTPS and reports per-keyword match counts with snippet context. Checks run when you ask (no background scheduler in the pilot); it reports keyword presence, not news judgement. Up to 20 keywords per tripwire. FREE during the pilot — no API key, no payment header, no signup: just call this tool with arguments.input and the task runs immediately. Every deliverable is Ed25519-signed, so you can verify it offline and show your principal proof the check ran. Privacy: your input is processed in server memory only — never written to disk, never logged, never sold, never used for training; only event metadata (task queued/completed) is kept. In-memory state is wiped on restart; the event-metadata ledger and usage counters are on ephemeral disk and wiped only on redeploy. Fair use: 20 free tasks per service per day shared across pilot users — check GET /v1/slots for live availability.

news_tripwire input schema
{
  "type": "object",
  "properties": {
    "input": {
      "type": "object",
      "required": [
        "action",
        "keywords"
      ],
      "properties": {
        "url": {
          "type": "string",
          "format": "uri"
        },
        "label": {
          "type": "string",
          "maxLength": 200
        },
        "action": {
          "enum": [
            "register",
            "check"
          ],
          "type": "string"
        },
        "keywords": {
          "type": "array",
          "items": {
            "type": "string",
            "maxLength": 100
          },
          "maxItems": 20
        },
        "tripwire_id": {
          "type": "string"
        }
      }
    },
    "quote_id": {
      "type": "string",
      "description": "Advanced machine flow: a quote_id from POST /quote for this service. When given, the quote's input is used and the X-PAYMENT header must authorize that quote. Not needed during the free testing phase — pass arguments.input directly instead. Human flow (X-API-KEY): pass input."
    }
  }
}
proof_of_work_audit
Advertised by the server during the last successful anonymous check.

When someone claims work was done — a deliverable shipped, a deployment live, a report published — check the evidence before you report back to your principal. Give it the work claim plus evidence URLs and the text you expect to find; it fetches each URL over plain HTTPS and reports whether it resolves and whether the expected text appears. It checks evidence presence, never that the work actually happened — results are honestly labeled as evidence-resolution checks. Up to 10 evidence items per task. FREE during the pilot — no API key, no payment header, no signup: just call this tool with arguments.input and the task runs immediately. Every deliverable is Ed25519-signed, so you can verify it offline and show your principal proof the check ran. Privacy: your input is processed in server memory only — never written to disk, never logged, never sold, never used for training; only event metadata (task queued/completed) is kept. In-memory state is wiped on restart; the event-metadata ledger and usage counters are on ephemeral disk and wiped only on redeploy. Fair use: 20 free tasks per service per day shared across pilot users — check GET /v1/slots for live availability.

proof_of_work_audit input schema
{
  "type": "object",
  "properties": {
    "input": {
      "type": "object",
      "required": [
        "work_claim",
        "evidence"
      ],
      "properties": {
        "evidence": {
          "type": "array",
          "items": {
            "type": "object",
            "required": [
              "url"
            ],
            "properties": {
              "url": {
                "type": "string",
                "format": "uri"
              },
              "label": {
                "type": "string",
                "maxLength": 200
              },
              "expected_text": {
                "type": "string",
                "maxLength": 1000
              }
            }
          },
          "maxItems": 10
        },
        "work_claim": {
          "type": "string",
          "maxLength": 1000
        }
      }
    },
    "quote_id": {
      "type": "string",
      "description": "Advanced machine flow: a quote_id from POST /quote for this service. When given, the quote's input is used and the X-PAYMENT header must authorize that quote. Not needed during the free testing phase — pass arguments.input directly instead. Human flow (X-API-KEY): pass input."
    }
  }
}

Prompts

Not advertised

No prompt definitions available.

Resources

Not advertised

No resource definitions available.

90-day uptime

A lightweight connection check about every six hours, sampled on hosts with many listings. It shows the server answered, not that its tools work.

Too few checks for a percentage yet (2 of 2 answered).

  1. 2026-11-06: 1 of 1 checks answered
  2. 2026-11-07: 1 of 1 checks answered

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
335 ms
95th percentile latency
335 ms

Maintenance history

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

  • · probe · passed · 335 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 shoon-a2a-trust-services-mcp https://shoon-a2a-sandbox.onrender.com/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 shoon-a2a-trust-services-mcp --url https://shoon-a2a-sandbox.onrender.com/mcp

Cursor

Merge this server into .cursor/mcp.json in your project, then enable shoon-a2a-trust-services-mcp in your MCP settings.
Cursor configuration
{
  "mcpServers": {
    "shoon-a2a-trust-services-mcp": {
      "url": "https://shoon-a2a-sandbox.onrender.com/mcp"
    }
  }
}

Cline

Merge this into cline_mcp_settings.json (Cline → MCP Servers → Configure).
Cline configuration
{
  "mcpServers": {
    "shoon-a2a-trust-services-mcp": {
      "type": "streamableHttp",
      "url": "https://shoon-a2a-sandbox.onrender.com/mcp",
      "disabled": false
    }
  }
}

VS Code

Merge this server into .vscode/mcp.json. Use MCP: List Servers to start shoon-a2a-trust-services-mcp and inspect its tools.
VS Code configuration
{
  "servers": {
    "shoon-a2a-trust-services-mcp": {
      "type": "http",
      "url": "https://shoon-a2a-sandbox.onrender.com/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 shoon-a2a-trust-services-mcp https://shoon-a2a-sandbox.onrender.com/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://shoon-a2a-sandbox.onrender.com/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": {
    "shoon-a2a-trust-services-mcp": {
      "serverUrl": "https://shoon-a2a-sandbox.onrender.com/mcp"
    }
  }
}

Let your agent find its tools

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