Tersign Evidence

{
  "$schema": "https://static.modelcontextprotocol.io/schemas/2025-12-11/server.schema.json",
  "name": "io.github.tersignhq/evidence",
  "description": "Counter-signed evidence records for agent commerce: receipts, verification, dispute envelopes.",
  "title": "Tersign Evidence",
  "repository": {
    "url": "https://github.com/tersignhq/tersign-js",
    "source": "github"
  },
  "version": "0.6.3",
  "websiteUrl": "https://tersign.ai",
  "packages": [
    {
      "registryType": "npm",
      "identifier": "tersign",
      "version": "0.6.3",
      "runtimeHint": "npx",
      "transport": {
        "type": "stdio"
      },
      "environmentVariables": [
        {
          "description": "Optional: your own 0x-prefixed signing key. Unset or empty, the server uses the key in the macOS keychain (tersign-signer) or ~/.tersign/signer.key, and generates one there on first run. The key never leaves your machine. If your ledger account has a registered signing key, set that key here: the ledger rejects respondent dispute evidence signed by any other key.",
          "format": "string",
          "isSecret": true,
          "name": "TERSIGN_SELLER_KEY"
        },
        {
          "description": "Seller/issuer display name",
          "format": "string",
          "name": "TERSIGN_ISSUER_NAME"
        },
        {
          "description": "Seller jurisdiction (e.g. HK)",
          "format": "string",
          "name": "TERSIGN_ISSUER_JURISDICTION"
        },
        {
          "description": "Seller tax/business-registration id (optional)",
          "format": "string",
          "name": "TERSIGN_ISSUER_TAX_ID"
        },
        {
          "description": "Ledger base URL (optional). Needed by the dispute tools, and with the API key and seller id by record_refund and chained issue_receipt; record_disclosure defaults to https://tersign.ai",
          "format": "string",
          "name": "TERSIGN_LEDGER_URL"
        },
        {
          "description": "Ledger seller API key (optional). With TERSIGN_LEDGER_URL and TERSIGN_LEDGER_SELLER_ID it enables record_refund and chained issue_receipt; with TERSIGN_LEDGER_URL it authenticates respondent dispute evidence. record_disclosure needs no API key.",
          "format": "string",
          "isSecret": true,
          "name": "TERSIGN_LEDGER_API_KEY"
        },
        {
          "description": "Ledger seller id (optional). With TERSIGN_LEDGER_URL and TERSIGN_LEDGER_API_KEY it enables record_refund and chained issue_receipt.",
          "format": "string",
          "name": "TERSIGN_LEDGER_SELLER_ID"
        }
      ]
    }
  ],
  "_meta": {
    "io.modelcontextprotocol.registry/publisher-provided": {
      "categories": [
        "finance",
        "security"
      ],
      "license": "Apache-2.0",
      "summary": "Tersign is the evidence layer for agent commerce (B2B / machine-to-machine). Agents issue seller-signed EIP-712 receipts and action records; the hosted ledger at https://tersign.ai optionally counter-signs them into per-seller hash chains that anyone can verify without an account. Disputes export as venue-ready evidence envelopes (generic / internet-court / kleros / uma). The SDK and MCP server work fully standalone without the hosted ledger: issue and verify offline, counter-sign later. No configuration is needed: every environment variable is optional, and the server generates and keeps a local signing key on first run when none is set. record_disclosure's first call self-provisions a free signer-keyed account on the ledger (https://tersign.ai by default), except when that key is already registered to an API-key account (409) or the daily provisioning caps are reached (429; https://tersign.ai/pricing). Canonical bytes, digests and chain construction are pinned by public two-sided conformance vectors: https://github.com/tersignhq/evidence-record-conformance (Apache-2.0, CI-tested). Verify a live counter-signed record right now: npx tersign verify 0xe5874f1ffe87f0a6dd9eb157730f67b86ee4538b125fe30fcc4e165213dd3fc4 --ledger https://tersign.ai",
      "tags": [
        "evidence",
        "receipts",
        "counter-signing",
        "agent-commerce",
        "agent-payments",
        "x402",
        "disputes",
        "eip-712",
        "audit-trail",
        "verification"
      ],
      "tools": [
        "issue_receipt",
        "verify_receipt",
        "verify_compliance_record",
        "record_disclosure",
        "record_refund",
        "open_dispute",
        "submit_dispute_evidence",
        "adjudicate_dispute",
        "get_dispute"
      ]
    }
  }
}