Tersign MCP

The Tersign MCP server enables AI agents to generate, counter-sign, and anchor EIP-712 receipts and action records. It provides a record layer where machines can create immutable, verifiable logs of agent activities and payments, anchored to independent time sources for dispute resolution and compliance.

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Package and access

Local package with source-attributed installation metadata. Koskamo does not execute packages during review.

Community listingLocal stdioSource reviewed; not executedPublished by Tersign

Vendor documentation

What you can do with it

Generate counter-signed EIP-712 receipts for agent transactions
Anchor record chains to independent time sources for proof of existence
Verify receipt signatures and chain integrity offline or via ledger
Export venue-formatted evidence envelopes for disputes

Source and maintenance

Community listingRegistry 0.6.8

mcp-registry: io.github.tersignhq/evidence@0.6.8 Source repository Project website

Maintenance checked: Oct 31, 2026, 10:27 PM UTC

Packages and installation

Source-provided package data. Koskamo has not executed or live-probed this package.

tersign 0.6.8

npmnpx

tersign package definition

{
  "version": "0.6.8",
  "transport": "stdio",
  "identifier": "tersign",
  "runtimeHint": "npx",
  "registryType": "npm",
  "environmentVariables": [
    {
      "name": "TERSIGN_SELLER_KEY",
      "format": "string",
      "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."
    },
    {
      "name": "TERSIGN_ISSUER_NAME",
      "format": "string",
      "description": "Seller/issuer display name"
    },
    {
      "name": "TERSIGN_ISSUER_JURISDICTION",
      "format": "string",
      "description": "Seller jurisdiction (e.g. HK)"
    },
    {
      "name": "TERSIGN_ISSUER_TAX_ID",
      "format": "string",
      "description": "Seller tax/business-registration id (optional)"
    },
    {
      "name": "TERSIGN_LEDGER_URL",
      "format": "string",
      "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"
    },
    {
      "name": "TERSIGN_LEDGER_API_KEY",
      "format": "string",
      "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."
    },
    {
      "name": "TERSIGN_LEDGER_SELLER_ID",
      "format": "string",
      "description": "Ledger seller id (optional). With TERSIGN_LEDGER_URL and TERSIGN_LEDGER_API_KEY it enables record_refund and chained issue_receipt."
    }
  ]
}

Tools

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No tool definitions available.

Connect from your client

Each snippet configures the same source-provided package; replace placeholders before use.

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Cursor

Merge this local stdio configuration, replace every placeholder environment value, and restart Cursor. Koskamo has not executed this package.

Cursor configuration

{
  "mcpServers": {
    "tersign-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "tersign@0.6.8"
      ],
      "env": {
        "TERSIGN_SELLER_KEY": "<YOUR_TERSIGN_SELLER_KEY>",
        "TERSIGN_ISSUER_NAME": "<YOUR_TERSIGN_ISSUER_NAME>",
        "TERSIGN_ISSUER_JURISDICTION": "<YOUR_TERSIGN_ISSUER_JURISDICTION>",
        "TERSIGN_ISSUER_TAX_ID": "<YOUR_TERSIGN_ISSUER_TAX_ID>",
        "TERSIGN_LEDGER_URL": "<YOUR_TERSIGN_LEDGER_URL>",
        "TERSIGN_LEDGER_API_KEY": "<YOUR_TERSIGN_LEDGER_API_KEY>",
        "TERSIGN_LEDGER_SELLER_ID": "<YOUR_TERSIGN_LEDGER_SELLER_ID>"
      }
    }
  }
}

Cline

Merge this local stdio configuration, replace every placeholder environment value, and restart Cline. Koskamo has not executed this package.

Cline configuration

{
  "mcpServers": {
    "tersign-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "tersign@0.6.8"
      ],
      "env": {
        "TERSIGN_SELLER_KEY": "<YOUR_TERSIGN_SELLER_KEY>",
        "TERSIGN_ISSUER_NAME": "<YOUR_TERSIGN_ISSUER_NAME>",
        "TERSIGN_ISSUER_JURISDICTION": "<YOUR_TERSIGN_ISSUER_JURISDICTION>",
        "TERSIGN_ISSUER_TAX_ID": "<YOUR_TERSIGN_ISSUER_TAX_ID>",
        "TERSIGN_LEDGER_URL": "<YOUR_TERSIGN_LEDGER_URL>",
        "TERSIGN_LEDGER_API_KEY": "<YOUR_TERSIGN_LEDGER_API_KEY>",
        "TERSIGN_LEDGER_SELLER_ID": "<YOUR_TERSIGN_LEDGER_SELLER_ID>"
      }
    }
  }
}

VS Code

Merge this local stdio configuration, replace every placeholder environment value, and restart VS Code. Koskamo has not executed this package.

VS Code configuration

{
  "servers": {
    "tersign-mcp": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "tersign@0.6.8"
      ],
      "env": {
        "TERSIGN_SELLER_KEY": "<YOUR_TERSIGN_SELLER_KEY>",
        "TERSIGN_ISSUER_NAME": "<YOUR_TERSIGN_ISSUER_NAME>",
        "TERSIGN_ISSUER_JURISDICTION": "<YOUR_TERSIGN_ISSUER_JURISDICTION>",
        "TERSIGN_ISSUER_TAX_ID": "<YOUR_TERSIGN_ISSUER_TAX_ID>",
        "TERSIGN_LEDGER_URL": "<YOUR_TERSIGN_LEDGER_URL>",
        "TERSIGN_LEDGER_API_KEY": "<YOUR_TERSIGN_LEDGER_API_KEY>",
        "TERSIGN_LEDGER_SELLER_ID": "<YOUR_TERSIGN_LEDGER_SELLER_ID>"
      }
    }
  }
}

Claude Desktop

Merge this local stdio configuration, replace every placeholder environment value, and restart Claude Desktop. Koskamo has not executed this package.

Claude Desktop configuration

{
  "mcpServers": {
    "tersign-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "tersign@0.6.8"
      ],
      "env": {
        "TERSIGN_SELLER_KEY": "<YOUR_TERSIGN_SELLER_KEY>",
        "TERSIGN_ISSUER_NAME": "<YOUR_TERSIGN_ISSUER_NAME>",
        "TERSIGN_ISSUER_JURISDICTION": "<YOUR_TERSIGN_ISSUER_JURISDICTION>",
        "TERSIGN_ISSUER_TAX_ID": "<YOUR_TERSIGN_ISSUER_TAX_ID>",
        "TERSIGN_LEDGER_URL": "<YOUR_TERSIGN_LEDGER_URL>",
        "TERSIGN_LEDGER_API_KEY": "<YOUR_TERSIGN_LEDGER_API_KEY>",
        "TERSIGN_LEDGER_SELLER_ID": "<YOUR_TERSIGN_LEDGER_SELLER_ID>"
      }
    }
  }
}

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