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Signed facts you can verify against the published key, not ratings; facts only, no advice. Query: ?url=https://...","extensions":{"bazaar":{"info":{"input":{"method":"GET","queryParams":{"url":"https://x402.org/protected"},"type":"http"},"output":{"example":{"facts":{"bazaar":{"available":true,"host_listing_count":3,"last_called_at":"2026-10-14T12:00:00Z","listed":true,"listed_payTo":["0x742d35cc6634c0532925a3b844bc454e4438f44e"],"payer_trend":[{"calls30d":17,"payers30d":4,"snapshot":"2026-10-15"}],"payout_wallet_reuse":{},"snapshot_date":"2026-10-15"},"challenge":{"accepts":[],"problems":[],"valid":true},"checked_at":"2026-10-15T00:00:00Z","disclaimer":"Deterministic observations only. Not advice to pay, buy or sell.","reachability":{"http_status":402,"latency_ms":180,"reachable":true},"schema":"prepay-check/v1","target":"https://x402.org/protected"},"signature":{"alg":"Ed25519","key_id":"72cb9da845cc948f","public_key_b64":"C3wmUnTtL12LUfkfDCR0bIeUXjbfq+hde5OeQC+dUy0=","signed_over":"canonical JSON of facts (sorted keys, no whitespace)","value_b64":"base64 Ed25519 signature over the canonical facts"}},"type":"json"}},"schema":{"$schema":"https://json-schema.org/draft/2020-12/schema","properties":{"input":{"additionalProperties":false,"properties":{"method":{"enum":["GET","HEAD","DELETE"],"type":"string"},"queryParams":{"properties":{"url":{"description":"Full https URL of the x402 endpoint to check before paying it","format":"uri","type":"string"}},"required":["url"],"type":"object"},"type":{"const":"http","type":"string"}},"required":["type","method"],"type":"object"},"output":{"properties":{"example":{"type":"object"},"type":{"type":"string"}},"required":["type"],"type":"object"}},"required":["input"],"type":"object"}}},"lastUpdated":"2026-10-21T10:38:41.037Z","quality":{"l30DaysTotalCalls":3,"l30DaysUniquePayers":1,"lastCalledAt":"2026-10-21T10:38:40.102Z"},"resource":"https://89-116-220-218.sslip.io/x402/preflight","type":"http","x402Version":2},"source":"x402_bazaar","summary":"Pre-pay Check: Ed25519-signed, deterministic facts about another x402 endpoint before you pay it: challenge validity, reachability and latency, host listing count, payout wallet reuse across hosts, last-called and payer trend from daily Bazaar snapshots. Use it when choosing between paid endpoints. Signed facts you can verify against the published key, not ratings; facts only, no advice. 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