1 — Add to Cursor MCP config
~/.cursor/mcp.json
{
  "mcpServers": {
    "thoughtproof": {
      "command": "npx",
      "args": ["pot-mcp"],
      "env": { "TP_API_KEY": "tp_op_..." }
    }
  }
}
2 — Agent calls thoughtproof_verify before acting
Terminal — payment-agent
agent processing: Approve €500 to vendor-42 (invoice #4421)
 
calling thoughtproof_verify...
  agentId: agent_OD_JD9t_8vvDW_5s
  claim: "Approve €500 payment to vendor-42"
  verdict: VERIFIED
  domain: finance
3 — Signed receipt issued
api.thoughtproof.ai — response 201
Receipt issued
receiptId rcpt_ZWLFM5V5SZvHCPou
verdict VERIFIED
trust score
0.000
blockHash sha256:c6907568f69e486ca11068dc244…
algorithm EdDSA / Ed25519
expires 2026-06-02T19:37:19Z
the black box stays black. the output gets a receipt.
thoughtproof.ai · npm install pot-mcp · api.thoughtproof.ai/openapi.json
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