Server definition

Hash: sha256:e649020e864b13b240cc333d0c1339204d35c2050acf2b0545166e079d097a9e
What it is: What a remote MCP server returned when asked what it offers: 5 tools

The blob, as servednamed by its sha256

{
  "instructions": null,
  "tools": [
    {
      "description": "Create a FreeSign envelope from a PDF SHA-256 hash. Do not send PDF bytes. The created envelope is NOT yet session-bound — the browser that opens the returned signing_url generates an ECDSA P-256 keypair locally and POSTs the public JWK to /api/envelopes/{id}/session-bind before any protected request will succeed. AI agents calling this tool just hand the signing_url to a human, who continues in a browser.",
      "inputSchema": {
        "properties": {
          "document_sha256": {
            "description": "SHA-256 of the original PDF bytes, computed locally by the user or agent.",
            "pattern": "^[a-f0-9]{64}$",
            "type": "string"
          }
        },
        "required": [
          "document_sha256"
        ],
        "type": "object"
      },
      "name": "create_signing_envelope",
      "outputSchema": {
        "properties": {
          "envelope_id": {
            "type": "string"
          },
          "expires_at": {
            "type": "string"
          },
          "session_binding_required": {
            "description": "True when the envelope still needs the browser to call /api/envelopes/{id}/session-bind. Always true for MCP-created envelopes.",
            "type": "boolean"
          },
          "signing_url": {
            "type": "string"
          }
        },
        "required": [
          "envelope_id",
          "signing_url",
          "expires_at"
        ],
        "type": "object"
      }
    },
    {
      "description": "Return the .ots proof (base64) for a given OpenTimestamps anchor on an envelope. Use the official `ots-cli` to verify offline against Bitcoin block headers. Each seal has two anchors: `kind: \"byterange\"` commits to the signed document, `kind: \"signed_attrs\"` commits to SHA-256 of the CMS SignedAttributes (which carry the post-quantum key commitment).",
      "inputSchema": {
        "properties": {
          "anchor_id": {
            "pattern": "^ots_[a-f0-9]{32}$",
            "type": "string"
          },
          "envelope_id": {
            "pattern": "^env_[a-f0-9]{32}$",
            "type": "string"
          }
        },
        "required": [
          "envelope_id",
          "anchor_id"
        ],
        "type": "object"
      },
      "name": "get_ots_proof",
      "outputSchema": {
        "properties": {
          "anchor_id": {
            "type": "string"
          },
          "anchored_hash": {
            "type": "string"
          },
          "btc_block_hash": {
            "type": [
              "string",
              "null"
            ]
          },
          "btc_block_height": {
            "type": [
              "integer",
              "null"
            ]
          },
          "calendar_urls": {
            "items": {
              "type": "string"
            },
            "type": "array"
          },
          "envelope_id": {
            "type": "string"
          },
          "kind": {
            "enum": [
              "byterange",
              "signed_attrs"
            ],
            "type": "string"
          },
          "proof_base64": {
            "description": "Complete .ots file bytes, base64.",
            "type": "string"
          },
          "status": {
            "enum": [
              "pending",
              "confirmed"
            ],
            "type": "string"
          }
        },
        "required": [
          "envelope_id",
          "anchor_id",
          "status",
          "anchored_hash",
          "proof_base64"
        ],
        "type": "object"
      }
    },
    {
      "description": "Return the envelope record (including final_pdf_sha256, final_signature_base64url, final_payload_json), per-signer signing receipts, and OpenTimestamps anchor metadata. Evidence only, never PDF bytes.",
      "inputSchema": {
        "properties": {
          "envelope_id": {
            "type": "string"
          }
        },
        "required": [
          "envelope_id"
        ],
        "type": "object"
      },
      "name": "get_receipt",
      "outputSchema": {
        "properties": {
          "envelope": {
            "type": "object"
          },
          "ots_anchors": {
            "items": {
              "type": "object"
            },
            "type": "array"
          },
          "receipts": {
            "items": {
              "type": "object"
            },
            "type": "array"
          }
        },
        "required": [
          "envelope",
          "receipts",
          "ots_anchors"
        ],
        "type": "object"
      }
    },
    {
      "description": "Return an envelope's append-only audit-event hash chain together with a server-computed integrity verdict: every event_hash is recomputed from its canonical material, and the prev_event_hash linkage and per-envelope seq contiguity are checked. Evidence only, never PDF bytes. The raw events are included verbatim so the caller can independently re-derive the verdict instead of trusting `chain.valid`.",
      "inputSchema": {
        "properties": {
          "envelope_id": {
            "pattern": "^env_[a-f0-9]{32}$",
            "type": "string"
          }
        },
        "required": [
          "envelope_id"
        ],
        "type": "object"
      },
      "name": "verify_audit_chain",
      "outputSchema": {
        "properties": {
          "attested_audit_chain_head_hash": {
            "description": "The audit-chain head derived from the signer-signed v2 final payload (G-01), fed into the verdict's head cross-check. NULL until the envelope is finalized.",
            "type": [
              "string",
              "null"
            ]
          },
          "attested_head_signature_verified": {
            "description": "True when the final-payload signature carrying the attested head was re-verified against the signer's on-file public key. False when not finalized or the signature did not verify.",
            "type": "boolean"
          },
          "chain": {
            "properties": {
              "broken_at": {
                "description": "seq of the first broken event, or null (also null for a head_mismatch — no single event is at fault).",
                "type": [
                  "integer",
                  "null"
                ]
              },
              "event_count": {
                "type": "integer"
              },
              "events": {
                "items": {
                  "type": "object"
                },
                "type": "array"
              },
              "head_checked": {
                "description": "True when an attested head was supplied and cross-checked against the recomputed chain.",
                "type": "boolean"
              },
              "head_match": {
                "description": "Result of the head cross-check, or null when no attested head was available.",
                "type": [
                  "boolean",
                  "null"
                ]
              },
              "reason": {
                "enum": [
                  "hash_mismatch",
                  "broken_link",
                  "seq_bad_start",
                  "seq_gap",
                  "seq_duplicate",
                  "head_mismatch",
                  null
                ],
                "type": [
                  "string",
                  "null"
                ]
              },
              "valid": {
                "type": "boolean"
              }
            },
            "required": [
              "valid",
              "event_count",
              "broken_at",
              "reason",
              "head_checked",
              "head_match",
              "events"
            ],
            "type": "object"
          },
          "envelope_id": {
            "type": "string"
          },
          "events": {
            "items": {
              "type": "object"
            },
            "type": "array"
          }
        },
        "required": [
          "envelope_id",
          "attested_audit_chain_head_hash",
          "attested_head_signature_verified",
          "chain",
          "events"
        ],
        "type": "object"
      }
    },
    {
      "description": "Find FreeSign receipts matching a local document SHA-256 hash.",
      "inputSchema": {
        "properties": {
          "document_sha256": {
            "pattern": "^[a-f0-9]{64}$",
            "type": "string"
          }
        },
        "required": [
          "document_sha256"
        ],
        "type": "object"
      },
      "name": "verify_document_hash",
      "outputSchema": {
        "properties": {
          "matches": {
            "items": {
              "type": "object"
            },
            "type": "array"
          }
        },
        "required": [
          "matches"
        ],
        "type": "object"
      }
    }
  ]
}

Verify it yourself

curl -s https://api.teppi.xyz/v1/evidence/sha256:e649020e864b13b240cc333d0c1339204d35c2050acf2b0545166e079d097a9e | sha256sum