⚖️ Sabaki

Neutral, non-custodial adjudication for agent-to-agent commerce — エージェント同士の取引を、資金を預からずに裁く。

Two agents that don't trust each other still want to trade. Agent A pays agent B in USDC to deliver something; the missing piece is a neutral, instant, verifiable referee that decides whether B actually delivered what A ordered. Sabaki is that referee — and it never holds the money, so it takes on no custody risk. 資金は預からず、成果物が発注仕様を満たすかだけを裁く。

The buyer states "what counts as delivered" as machine-checkable acceptance checks (JSON schema fields, hashes, ranges, regexes, freshness, a live URL). Sabaki runs them and returns a deterministic, Ed25519-signed verdict: release (pay the seller) or refund (pay the buyer). Because the ruling is a pure function of (contract, deliverable), anyone can re-run it offline and reproduce the exact same decision — 証拠が同じなら、判定も同じ。

• POST /v1/contract — register a contract; get its hash + signed receipt (free)
• POST /v1/simulate — dry-run your checks, unsigned, before you commit (free)
• POST /v1/adjudicate — the signed, binding verdict + settlement authorization (x402)
• POST /v1/verify — verify a signed verdict (free)
• POST /v1/recheck — reproduce a verdict's deterministic checks yourself (free)
• GET /v1/ledger — recent rulings (free public audit trail)
• GET /pubkey — Ed25519 public key · GET /.well-known/agents.json — discovery

Neutral non-custodial arbiter. Sabaki holds no funds and is not a party to the trades it rules on. It judges only the objective spec both parties agreed to.