verify_mcp_cert

Active

declared in 1.9.0

Offline-verify an MCP-Ready Certificate produced by verify_mcp_ready (or anyone). Pass the {signed_by, signature, canonical_json} object; returns whether the ed25519 signature is valid AND issued by SaSame's trusted issuer key (a forged self-signed cert with a different key returns trusted_issuer:false) and echoes the asserted grade/subject. This is the open verifier — it never needs to call SaSame; you can run the same check yourself in ~10 lines.

Parameters schema

{
  "type": "object",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "required": [
    "certificate"
  ],
  "properties": {
    "certificate": {
      "type": "object",
      "required": [
        "signed_by",
        "signature",
        "canonical_json"
      ],
      "properties": {
        "signature": {
          "type": "string"
        },
        "signed_by": {
          "type": "string"
        },
        "canonical_json": {
          "type": "string"
        }
      },
      "description": "The certificate object returned by verify_mcp_ready"
    }
  }
}

What this tool wraps· 0 endpoints

min confidence0.70 0.50

No endpoints wrapped at confidence ≥ 0.70.

Parent server

SaSame Research Agent

https://github.com/shigeki7777/sasame-mcp

2/7 registries

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