{"slug":"402signal-com-route-060552","title":"402Signal checks the endpoint, price and recipient before your agent pays, on x4","host":"402signal.com","method":"POST","resource":"https://402signal.com/route","category":"market","description":"402Signal checks the endpoint, price and recipient before your agent pays, on x402 and MPP, and returns a signed record verifiable offline. $0.003 on Base, Solana, and Algorand only when a qualifying live offer is found; a miss is free. Seller payment is separate. Your agent keeps the wallet. Eviden","price_listed":0.003,"price_asked":0.003,"state":"answering","state_label":"Answering","checks_7d":1,"answered_7d":1,"latency_ms_median":826,"reported_calls_30d":418,"reported_payers_30d":6,"networks":["algorand:wGHE2Pwdvd7S12BL5FaOP20EGYesN73ktiC1qzkkit8=","eip155:8453","solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp"],"badge":"unverified","paid_checks_7d":0,"paid_ok_7d":0,"example_input":{"body":{"need":"erc20 token balance","url":"https://example.com/x402/balance"},"bodyType":"json","method":"POST","type":"http"},"output_schema":{"$schema":"https://json-schema.org/draft/2020-12/schema","properties":{"input":{"additionalProperties":false,"properties":{"body":{"anyOf":[{"required":["need"]},{"required":["url"]}],"properties":{"need":{"type":"string"},"require_route_binding":{"description":"Opt in to a signed v4 route binding; implies require_transparency even if false. Default false; ordinary requests keep v3. A ranked winner that cannot bind may fall through to the next already-probed selectable bindable candidate; 503 route_binding_unavailable only when none remain. wrapExactAuthorize reports state=binding_unavailable with keep_calling_route true; policy working, not a crash. Buyer verifies raw response JSON with a pinned log key and compares the current seller request and challenge before signing. Expiry or changed terms do not undo a settled checking fee. Guide: https://402signal.com/developers#route-binding","type":"boolean"},"require_transparency":{"description":"Require a durable leaf and signed checkpoint receipt on HTTP 200. Default false; require_route_binding=true also requires transparency. Receipt failure after settlement remains billed. Private replay records support bounded recovery of the original response; they are not long-term evidence storage. Keep your own copy outside public logs.","type":"boolean"},"url":{"type":"string"}},"type":"object"},"bodyType":{"enum":["json","form-data","text"],"type":"string"},"headers":{"additionalProperties":{"type":"string"},"type":"object"},"method":{"enum":["POST","PUT","PATCH"],"type":"string"},"queryParams":{"additionalProperties":{"type":"string"},"type":"object"},"type":{"const":"http","type":"string"}},"required":["type","method","bodyType","body"],"type":"object"},"output":{"properties":{"example":{"type":"object"},"type":{"type":"string"}},"required":["type"],"type":"object"}},"required":["input"],"type":"object"},"history":[{"day":"2026-09-24","reachable":true,"status":402,"valid_402":true,"asked_usdc":0.003,"price_match":true,"latency_ms":826,"error":null}],"description_full":"402Signal checks the endpoint, price and recipient before your agent pays, on x402 and MPP, and returns a signed record verifiable offline. $0.003 on Base, Solana, and Algorand only when a qualifying live offer is found; a miss is free. Seller payment is separate. Your agent keeps the wallet. Evidence enters the PQ Trust log on Algorand MainNet. require_route_binding=true adds a signed v4 receipt for buyer-side comparison before signing. Guide: https://402signal.com/developers#route-binding","last_updated":"2026-09-24T13:28:12.35Z","schemes":["exact"]}