once_key_claim

com.oliverkiss/agentic-endpoints · Verify this server

Atomic idempotency witness. Claims a {namespace, action_key} pair exactly once, so a fleet of agents cannot perform the same side effect twice. Call this BEFORE any non-idempotent action such as sending an email, charging a card, or posting an order. Returns one of: 'claimed' — you won, do the work, then call once_key_complete; 'in_progress' — another agent holds a live lease, wait retry_after seconds and do NOT do the work; 'duplicate' — already done, and the 'result' field carries the original outcome, so use it instead of repeating the work; 'held' — another agent claimed this key, set no lease, and has NOT completed it: there is no result and there may never be one, so do NOT do the work and do NOT treat it as done, because the key stays locked until expires_at; 'conflict' — the same key was claimed with a different payload hash, so your key derivation is wrong. Backed by a strongly consistent Durable Object; this is not something an agent can safely reimplement locally. Costs $0.001 in USDC on Base, paid via the x402 protocol.