Proof-of-Completion for AI agents. Postcept checks that high-risk agent actions (refunds, credits, cancellations, ticket updates) actually completed in the system of record, then issues signed, tamper-evident receipts.
Postcept itself is a hosted product. What's open here is the trust layer and the API clients.
receipt (@postcept/receipt): verify a Postcept Receipt's signature yourself, in any JavaScript runtime. No API call, and nothing to trust but the published key.
sdk (@postcept/sdk): typed TypeScript client for the API.
postcept-python (postcept): Python client for the API.
mcp (@postcept/mcp): Model Context Protocol server, so an agent can verify its own actions as a tool.
relay (@postcept/relay): Open-source customer-side relay for local connector credentials and evidence minimization.
demo (@postcept/demo): Locally runnable CLI demo covering completion gap verification scenarios.
gauntlet (@postcept/gauntlet): The Completion Gap Gauntlet, a reproducible scoring harness for verification baselines.
uptime: Independent, append-only uptime history.