Koskamo

Stablecoin Attestations MCP

Provides machine-readable stablecoin reserve attestations as JSON, including reserves, composition, attestor, on-chain supply, and reserve ratio. Supports querying specific issuers and historical periods, with tools for listing issuers and retrieving detailed reserve data.

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.

Stablecoin Attestations MCP logo, by AgentwaresCommunity listingStreamable HTTPNo sign-inEndpoint checked 2026-11-06Published by Agentwares
You need:No signup: POST /v1/keys returns an API key with a $0 balance and fund_urlPOST it with the key and an amount for a Stripe Checkout URLsample=true is free and needs no key
MCP endpoint (Streamable HTTP)
https://agentwares-stablecoin.vercel.app/mcp
Vendor documentation

What its tools do

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

Read-only (1)

Can change data (1)

2 of 2 have a description · 2 of 2 declare behavior hints · 1 of 1 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

  • Retrieve latest parsed reserve attestation for a specific stablecoin issuer
  • List all issuers in the registry with attestation details
  • Query historical reserve data by period
  • Get on-chain supply and reserve ratio data

Source and maintenance

Community listingRegistry 0.1.3
mcp-registry: io.github.agentwares/stablecoin-attestations@0.1.3Source repositoryProject website
Maintenance checked

Protocol and capabilities

Server
stablecoin-attestations 0.1.3
MCP protocol negotiated in check
2025-11-25
Tools
2 advertised
Resources
Not advertised
Resource templates
Not advertised
Prompts
Not advertised
Server-advertised capabilities
{
  "tools": {
    "listChanged": true
  },
  "logging": {}
}

Server-provided instructions

Untrusted server output shown for inspection. It is not Koskamo guidance and is excluded from knowledge search.

Issuer reserve attestations parsed to JSON. 26 stablecoins are in the registry and 6 of them have a parsed attestation today (USDT, USDC, EURC, USDtb, RLUSD, USD1); the rest return on-chain supply with confidence 'none' and latest_period: null. Start with stablecoin_list_issuers (free) to pick a symbol, then stablecoin_reserves({symbol}) — $0.02 per call against a prepaid balance (Authorization: Bearer <key>), or sample=true for a free example that needs no key. No key yet? POST /v1/keys with no auth for one, then POST its fund_url to get a Stripe Checkout URL, or fund it in USDC over x402; the 402 you get without credit carries the same instructions. Every response carries as_of, source_url, sources and a notice; the data is informational, never advice.

Tools

2 advertised

stablecoin_reserves — Stablecoin reserve attestation
Advertised by the server during the last successful anonymous check.
Advertised destructiveOpen-world

Latest parsed reserve attestation for one stablecoin issuer as JSON: as_of date, total reserves, composition by asset category, attestor, source_url, current on-chain supply (DefiLlama) and the reserve ratio. Use it when an agent needs machine-readable backing data instead of reading the issuer's PDF. Pass symbol (USDC, USDT, ...) or issuer; period=YYYY-MM selects an earlier month. Issuers without a third-party attestation return supply only with confidence 'none'. Paid: $0.02 per call; without credit you get a PAYMENT_REQUIRED result. Set sample=true for a free example response.

stablecoin_reserves input schema
{
  "type": "object",
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "properties": {
    "issuer": {
      "type": "string",
      "minLength": 1,
      "description": "Issuer name or registry id when the symbol is unknown, e.g. \"circle\" or \"paxos\""
    },
    "period": {
      "type": "string",
      "pattern": "^\\d{4}-\\d{2}$",
      "description": "Report month as YYYY-MM. Default: the newest parsed month. See history_available."
    },
    "sample": {
      "type": "boolean",
      "default": false,
      "description": "Set true to return an example response at no charge (sample mode). Default false."
    },
    "symbol": {
      "type": "string",
      "minLength": 1,
      "description": "Token symbol, case-insensitive: USDC, USDT, PYUSD, RLUSD, ... (see stablecoin_list_issuers)"
    }
  },
  "additionalProperties": false
}
stablecoin_reserves output schema
{
  "type": "object",
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "required": [
    "issuer",
    "symbol",
    "name",
    "peg",
    "backing",
    "as_of",
    "period",
    "currency",
    "total_reserves_usd",
    "tokens_in_circulation_reported",
    "composition",
    "attestor",
    "attestation_type",
    "cadence",
    "source_url",
    "report_url",
    "issued_on",
    "onchain_supply",
    "reserve_ratio",
    "reserve_ratio_vs_onchain_supply",
    "confidence",
    "checks",
    "history_available",
    "sources",
    "sample",
    "notice"
  ],
  "properties": {
    "peg": {
      "type": "string"
    },
    "name": {
      "type": "string"
    },
    "as_of": {
      "type": [
        "string",
        "null"
      ]
    },
    "checks": {
      "anyOf": [
        {
          "type": "object",
          "required": [
            "composition_sums_to_total",
            "composition_gap",
            "reserves_cover_circulation"
          ],
          "properties": {
            "composition_gap": {
              "type": "number"
            },
            "composition_sums_to_total": {
              "type": "boolean"
            },
            "reserves_cover_circulation": {
              "type": [
                "boolean",
                "null"
              ]
            }
          },
          "additionalProperties": false
        },
        {
          "type": "null"
        }
      ]
    },
    "issuer": {
      "type": "string"
    },
    "notice": {
      "type": "string"
    },
    "period": {
      "type": [
        "string",
        "null"
      ]
    },
    "sample": {
      "type": "boolean"
    },
    "symbol": {
      "type": "string"
    },
    "backing": {
      "type": "string"
    },
    "cadence": {
      "type": "string"
    },
    "sources": {
      "type": "array",
      "items": {
        "type": "string"
      }
    },
    "attestor": {
      "type": [
        "string",
        "null"
      ]
    },
    "currency": {
      "type": "string"
    },
    "issued_on": {
      "type": [
        "string",
        "null"
      ]
    },
    "confidence": {
      "enum": [
        "high",
        "medium",
        "low",
        "none"
      ],
      "type": "string"
    },
    "report_url": {
      "type": [
        "string",
        "null"
      ]
    },
    "source_url": {
      "type": "string"
    },
    "composition": {
      "type": "array",
      "items": {
        "type": "object",
        "required": [
          "category",
          "label",
          "amount_usd",
          "share"
        ],
        "properties": {
          "label": {
            "type": "string"
          },
          "share": {
            "type": [
              "number",
              "null"
            ]
          },
          "category": {
            "enum": [
              "cash_at_banks",
              "cash_in_fund",
              "us_treasury_bills",
              "us_treasury_repo",
              "money_market_fund",
              "tokenized_fund",
              "other_government_securities",
              "commercial_paper",
              "corporate_bonds",
              "precious_metals",
              "bitcoin",
              "secured_loans",
              "crypto_collateral",
              "receivables_adjustments",
              "other"
            ],
            "type": "string"
          },
          "amount_usd": {
            "type": "number"
          }
        },
        "additionalProperties": false
      }
    },
    "reserve_ratio": {
      "type": [
        "number",
        "null"
      ]
    },
    "onchain_supply": {
      "anyOf": [
        {
          "type": "object",
          "required": [
            "amount",
            "currency",
            "as_of",
            "source",
            "defillama_id",
            "price_usd"
          ],
          "properties": {
            "as_of": {
              "type": "string"
            },
            "amount": {
              "type": "number"
            },
            "source": {
              "type": "string",
              "const": "defillama"
            },
            "currency": {
              "type": "string"
            },
            "price_usd": {
              "type": [
                "number",
                "null"
              ]
            },
            "defillama_id": {
              "type": "string"
            }
          },
          "additionalProperties": false
        },
        {
          "type": "null"
        }
      ]
    },
    "attestation_type": {
      "type": "string"
    },
    "history_available": {
      "type": "array",
      "items": {
        "type": "string"
      }
    },
    "total_reserves_usd": {
      "type": [
        "number",
        "null"
      ]
    },
    "tokens_in_circulation_reported": {
      "type": [
        "number",
        "null"
      ]
    },
    "reserve_ratio_vs_onchain_supply": {
      "type": [
        "number",
        "null"
      ]
    }
  },
  "additionalProperties": false
}
stablecoin_reserves annotations
{
  "readOnlyHint": false,
  "openWorldHint": true,
  "idempotentHint": false,
  "destructiveHint": true
}
stablecoin_list_issuers — List covered stablecoin issuers
Advertised by the server during the last successful anonymous check.
Advertised read-only

Free. Lists every issuer in the registry with symbol, issuer, attestation type, attestor, cadence, source_url and which months are parsed. Call it first to pick a symbol for stablecoin_reserves.

stablecoin_list_issuers input schema
{
  "type": "object",
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "properties": {},
  "additionalProperties": false
}
stablecoin_list_issuers output schema
{
  "type": "object",
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "required": [
    "count",
    "issuers",
    "price_usd_per_reserves_call",
    "notice"
  ],
  "properties": {
    "count": {
      "type": "number"
    },
    "notice": {
      "type": "string"
    },
    "issuers": {
      "type": "array",
      "items": {
        "type": "object",
        "required": [
          "id",
          "symbol",
          "name",
          "issuer",
          "peg",
          "backing",
          "attestor",
          "attestation_type",
          "cadence",
          "source_url",
          "fetch_mode",
          "latest_period",
          "months_available",
          "verified_at"
        ],
        "properties": {
          "id": {
            "type": "string"
          },
          "peg": {
            "type": "string"
          },
          "name": {
            "type": "string"
          },
          "issuer": {
            "type": "string"
          },
          "symbol": {
            "type": "string"
          },
          "backing": {
            "type": "string"
          },
          "cadence": {
            "type": "string"
          },
          "attestor": {
            "type": [
              "string",
              "null"
            ]
          },
          "fetch_mode": {
            "type": "string"
          },
          "source_url": {
            "type": "string"
          },
          "verified_at": {
            "type": "string"
          },
          "latest_period": {
            "type": [
              "string",
              "null"
            ]
          },
          "attestation_type": {
            "type": "string"
          },
          "months_available": {
            "type": "number"
          }
        },
        "additionalProperties": false
      }
    },
    "price_usd_per_reserves_call": {
      "type": "number"
    }
  },
  "additionalProperties": false
}
stablecoin_list_issuers annotations
{
  "readOnlyHint": true,
  "openWorldHint": false,
  "idempotentHint": true,
  "destructiveHint": false
}

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
743 ms
95th percentile latency
743 ms

Maintenance history

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

  • · probe · passed · 743 ms · metadata changed · 2 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 stablecoin-attestations-mcp-vercel https://agentwares-stablecoin.vercel.app/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 stablecoin-attestations-mcp-vercel --url https://agentwares-stablecoin.vercel.app/mcp

Cursor

Merge this server into .cursor/mcp.json in your project, then enable stablecoin-attestations-mcp-vercel in your MCP settings.
Cursor configuration
{
  "mcpServers": {
    "stablecoin-attestations-mcp-vercel": {
      "url": "https://agentwares-stablecoin.vercel.app/mcp"
    }
  }
}

Cline

Merge this into cline_mcp_settings.json (Cline → MCP Servers → Configure).
Cline configuration
{
  "mcpServers": {
    "stablecoin-attestations-mcp-vercel": {
      "type": "streamableHttp",
      "url": "https://agentwares-stablecoin.vercel.app/mcp",
      "disabled": false
    }
  }
}

VS Code

Merge this server into .vscode/mcp.json. Use MCP: List Servers to start stablecoin-attestations-mcp-vercel and inspect its tools.
VS Code configuration
{
  "servers": {
    "stablecoin-attestations-mcp-vercel": {
      "type": "http",
      "url": "https://agentwares-stablecoin.vercel.app/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 stablecoin-attestations-mcp-vercel https://agentwares-stablecoin.vercel.app/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://agentwares-stablecoin.vercel.app/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": {
    "stablecoin-attestations-mcp-vercel": {
      "serverUrl": "https://agentwares-stablecoin.vercel.app/mcp"
    }
  }
}

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