@witnessed/mcp

MCP building blocks for Receipts. Construct an MCP server that exposes issue_receipt / verify_receipt tools backed by the Receipts SDK (signing happens locally with the agent's own key).

npm i @witnessed/mcp

import { createMcpServer, makeHandlers } from "@witnessed/mcp";
import { ReceiptsClient } from "@witnessed/sdk";

const client = new ReceiptsClient({
  baseUrl: "https://witness.medtekki.no",
  privateJwk: ReceiptsClient.generateKey().privateJwk,
});
const trustedWitnessKeys = await fetch("https://witness.medtekki.no/public-key")
  .then((r) => r.json())
  .then((pk) => ({ [pk.key_id]: pk.public_key }));

const server = createMcpServer({ client, trustedWitnessKeys }); // connect over your transport

The hosted witness also exposes a remote MCP endpoint at https://witness.medtekki.no/mcp (verify/get only — issuance needs client-side signing, so issue with the SDK locally).

MIT licensed.