{"uid":"cap_rPvfJ3w5HC2vRx13TeGM3","slug":"council-of-ai-mcp-registry-population-slice-5aacd0eb","name":"Council of AI — MCP Registry 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/mcp-registry?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":354,"id":"mcp-registry","kind":"slice","rows":"<the population rows / artifact bytes, verbatim>","as_of":"2026-09-22T08:27:50Z","state":"INDEXED","n_unit":"own server names in the official MCP registry (one row per name, classified on isLatest=true)","schema":"csoai.population-door/0.1","settle":{"payer":"<0x… or null>","network":"<caip2 or null>","transaction":"<0x… or null>"},"source":["/interop/mcp-registry-self-listings-2026-09-22.json","/interop/agent-population-2026-09-17.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_9EscK1Q3svIxApzGh1Elp","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":"Returns a signed, verifiable population slice of server names indexed from the official MCP registry, with attestation metadata and cryptographic provenance.","exampleAgentPrompt":"Pull the latest signed population slice from the Council of AI MCP registry endpoint — I want to see how many server names are currently indexed, along with the attestation hash and timestamp so I can verify the data.","exampleUseCases":[{"title":"Audit MCP registry server count","prompt":"Can you fetch the Council of AI's signed MCP registry snapshot and tell me how many server names are currently indexed, plus the as_of timestamp?"},{"title":"Verify registry data integrity","prompt":"I need to confirm the integrity of the MCP registry data — grab the latest Council of AI population slice and give me the SHA-256 hash and ed25519 signature so I can check it myself."},{"title":"Track MCP ecosystem growth over time","prompt":"Get me the current Council of AI MCP registry population slice — I want to record the server count and timestamp so I can track how the MCP ecosystem is growing month over month."}],"resultDescription":"Returns a JSON object with the total count of MCP registry server names (n), a unique slice ID, raw population rows, an as_of timestamp, indexing state, schema version, settlement details (payer, network, transaction), source file references, and a signed attestation block containing a card schema URL, SHA-256 of the payload, surface label, and an optional ed25519 signature for cryptographic verification.","failureModes":["Payment not fulfilled — 402 response if x402 payment is not provided or insufficient","Invalid method — only GET/HEAD/DELETE accepted; POST or PUT will be rejected","Attestation signature may be null if the slice is an unsigned supporting run rather than an issued measurement card","Stale data — as_of timestamp may lag real-time registry updates","Registry source unavailable — upstream MCP registry fetch failure could result in stale or empty rows"],"whenToPreferThis":"Choose this endpoint when you need a cryptographically signed, independently verified snapshot of MCP registry server names with full attestation metadata — not just a raw registry dump. It is ideal when auditability, tamper-evidence, and reproducibility matter, such as compliance checks, ecosystem audits, or any workflow that needs to verify the provenance of MCP server population data.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-02T04:39:58.045Z","isFirstParty":false,"canonicalSlug":"council-of-ai-mcp-registry-population-slice-5aacd0eb"}