How do I install Tersign Evidence?

Pick a client above and copy the generated config. Cursor and VS Code also have a deep link when the server can run locally or remotely.

Is Tersign Evidence official?

No. Registry-listed is not the same as vendor-official. Read the methodology for the difference.

How is the trust score calculated?

This listing scores 13 (Limited). The formula is published on the methodology page.

MCPpedia

Tersign Evidence MCP Server | MCPpedia

Tersign Evidence MCP Server

Name: Tersign Evidence MCP Server
Author: tersignhq

The record layer for the machine age: counter-signed receipts and agent action records.

Tools Versions Alternatives

Registrytersignhq

13Limited

Install

~/Library/Application Support/Claude/claude_desktop_config.json

{
  "mcpServers": {
    "tersignhq-tersign-js": {
      "command": "npx",
      "args": [
        "-y",
        "tersign@0.6.7"
      ],
      "env": {
        "TERSIGN_SELLER_KEY": "YOUR_TERSIGN_SELLER_KEY",
        "TERSIGN_ISSUER_NAME": "",
        "TERSIGN_ISSUER_JURISDICTION": "",
        "TERSIGN_ISSUER_TAX_ID": "",
        "TERSIGN_LEDGER_URL": "",
        "TERSIGN_LEDGER_API_KEY": "YOUR_TERSIGN_LEDGER_API_KEY",
        "TERSIGN_LEDGER_SELLER_ID": ""
      }
    }
  }
}

Install guide

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Environment

Name	Required	Notes
TERSIGN_SELLER_KEY	No	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. Secret.
TERSIGN_ISSUER_NAME	No	Seller/issuer display name
TERSIGN_ISSUER_JURISDICTION	No	Seller jurisdiction (e.g. HK)
TERSIGN_ISSUER_TAX_ID	No	Seller tax/business-registration id (optional)
TERSIGN_LEDGER_URL	No	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
TERSIGN_LEDGER_API_KEY	No	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. Secret.
TERSIGN_LEDGER_SELLER_ID	No	Ledger seller id (optional). With TERSIGN_LEDGER_URL and TERSIGN_LEDGER_API_KEY it enables record_refund and chained issue_receipt.

Tersign Evidence MCP Server

Install

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