ProofSlip MCP server

Lightweight status poll for a ProofSlip receipt. Returns only status, is_terminal, and next_poll_after_seconds — no payload or summary. Use this instead of verify_receipt when you only need to know if a receipt state has changed. If is_terminal is false, wait next_poll_after_seconds before checking again. No API key required.

Create a ProofSlip receipt to record that something happened. Use 'action' for completed events, 'approval' for decisions awaiting review, 'handshake' for agent-to-agent coordination, 'resume' for continuation bookmarks, 'failure' for structured error records. Returns a receipt_id and verify_url. Receipts expire after 24 hours by default.

Get a free ProofSlip API key. Returns the key directly — save it immediately, it cannot be retrieved later. Only needed once. After signup, configure the key as PROOFSLIP_API_KEY environment variable to use create_receipt. Free tier: 500 receipts per month.

Verify a ProofSlip receipt and retrieve its full data (type, status, summary, payload, ref, expiry). Use this to check what happened before deciding what to do next. Returns the complete receipt if valid, or a not_found error if expired or missing. No API key required.