{"uid":"cap_K8KkHcKo9yJDubVhBLMEQ","slug":"council-of-ai-x402-bazaar-population-slice-19a28457","name":"Council of AI — x402-Bazaar Population Slice","description":"We measure how AI systems behave against frozen, published tests and publish checkable evidence. Issued measurement cards are signed; unsigned supporting runs are labelled. Read the live board and corrections ledger.","url":"https://councilof.ai/api/pop/x402-bazaar?utm_source=zero.xyz","method":"GET","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["input"],"properties":{"input":{"type":"object","required":["type","method"],"properties":{"type":{"type":"string","const":"http"},"method":{"enum":["GET","HEAD","DELETE"],"type":"string"}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object"}}}}},"responseSchema":{"type":"json","example":{"n":null,"id":"x402-bazaar","kind":"slice","rows":"<the population rows / artifact bytes, verbatim>","as_of":"2026-09-17T05:48:05Z","state":"INDEXED","n_unit":"listings per index frame (frames overlap; the artifact refuses a total, so n is null — not 0)","schema":"csoai.population-door/0.1","settle":{"payer":"<0x… or null>","network":"<caip2 or null>","transaction":"<0x… or null>"},"source":["/interop/agent-population-2026-09-17.json","/interop/x402-door-census-2026-09-16.json"],"attestation":{"schema":"https://councilof.ai/schema/card-v0.json","sha256":"<hex>","payload":{"kind":"csoai.population.slice/0.1","rows_sha256":"<hex>"},"surface":"population.slice","sig_ed25519":"<hex or null>"}}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.01","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"probe","requiresHandshake":false,"reviewCount":0,"rating":{"score":"0.00","successRate":"0.00","reviews":0,"stars":null,"state":"unrated"},"availabilityStatus":"unknown","priceObserved":null,"sessionDeposit":null,"pricing":{"kind":"static","summary":"$0.01/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.01","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.01","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_ivOCHk4Z_TJouyCDWEREe","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.01","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Fetches a signed, verifiable snapshot of x402 API marketplace listings indexed by Council of AI's independent measurement system","exampleAgentPrompt":"Can you pull the latest signed population slice from the Council of AI x402-bazaar index so I can see what API listings are currently indexed and check the attestation signature?","exampleUseCases":[{"title":"Auditing x402 marketplace listings","prompt":"Fetch me the current Council of AI population snapshot for the x402 bazaar — I want to verify the attestation signature and see which APIs are listed in the index right now."},{"title":"Tracking x402 API directory changes","prompt":"Get me the latest x402-bazaar population slice from Council of AI, including the source artifacts and the as_of timestamp, so I can compare it to last week's snapshot."},{"title":"Building a verified x402 API catalog","prompt":"Pull the signed population slice from the Council of AI x402-bazaar index — I need the rows data and the ed25519 attestation to confirm the listing data hasn't been tampered with."}],"resultDescription":"Returns a JSON object containing: a slice ID ('x402-bazaar'), kind ('slice'), verbatim population rows of x402 marketplace listings, an as_of timestamp, an INDEXED state flag, source artifact file references, settlement info (payer address, network, transaction hash), and a signed attestation card with SHA-256 hash, ed25519 signature, and schema reference. The 'n' field is null (not zero) because the artifact refuses a total count across overlapping index frames.","failureModes":["Payment not received or insufficient — returns 402 with payment requirements","Invalid HTTP method (e.g. POST) — only GET, HEAD, DELETE accepted","Attestation signature is null if signing has not yet occurred for that slice","Source artifacts temporarily unavailable — stale or missing rows data","Network or CAIP-2 chain unavailable — settle fields return null"],"whenToPreferThis":"Use this endpoint when you need a cryptographically attested, independently verifiable snapshot of x402 marketplace API listings — particularly when auditability, tamper-evidence, or signed provenance of directory data matters. Prefer this over generic API directories when you need the ed25519 signature and SHA-256 hash for downstream verification, or when you specifically need the Council of AI's independent measurement provenance rather than a self-reported listing.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-02T02:26:13.274Z","isFirstParty":false,"canonicalSlug":"council-of-ai-x402-bazaar-population-slice-19a28457"}