{"uid":"cap_kVcu58DUozJYDAYNI0OmT","slug":"clink-forge-state-population-lookup-16ad086a","name":"Clink Forge State Population Lookup","description":"Pay per call over x402. USDC on Base, no account, no API key. 28 government-sourced data products at $0.001–$0.05 per call, every response signed and provenance-chained.","url":"https://api.clinkforge.com/v1/p/state-population-lookup","method":"GET","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","properties":{"input":{"type":"object","properties":{"type":{"const":"http"},"method":{"const":"GET"},"queryParams":{"type":"object","required":["id"],"properties":{"id":{"type":"string","maxLength":4}},"additionalProperties":false}}},"output":{"type":"object"}}},"responseSchema":{"type":"json","example":{"data":[{"field":"value","_record_id":"R-100"}],"product":"example-product","row_count":1,"provenance":[{"hash":"sha256...","authority":"AGENCY","source_url":"https://agency.gov/data","observed_at":"2026-08-25T00:00:00Z"}],"attestation":{"signature":"base64...","result_digest":"sha256...","signing_key_id":"forge-signing-1"},"payment_receipt":{"amount_usd":0.01,"settlement_ref":"0xtx..."},"product_version":1},"description":"data rows + provenance chain + attestation"},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.001","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":"$0.001/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.001","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.001","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_iqRfUR0LSLkZIi4Si911p","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.001","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Returns government-sourced population data for a US state by state ID, with cryptographic provenance and attestation, paid per call via x402/USDC.","exampleAgentPrompt":"Pull the official government-sourced population figure for California (state ID 'CA') from Clink Forge — I need the cryptographically signed, provenance-chained result so I can verify the source.","exampleUseCases":[{"title":"Verify state population for policy analysis","prompt":"Get me the verified, government-sourced population data for Texas — I need the provenance chain so I can cite the official source in my report."},{"title":"Autonomous agent enriches demographic dataset","prompt":"For each state in my list, fetch the official signed population figure from Clink Forge using the two-letter state ID and log the attestation signature alongside the number."},{"title":"Audit trail for compliance reporting","prompt":"Retrieve the cryptographically attested population count for New York (state ID 'NY') — I need the full provenance record including which government agency and source URL it came from."}],"resultDescription":"Returns a JSON object containing one or more population data rows for the requested state, a provenance chain (hash, authority name, source government URL, and observation timestamp), a cryptographic attestation (signature, result digest, signing key ID), a payment receipt (amount in USD and on-chain settlement reference), product metadata (name, version), and a row count.","failureModes":["Invalid or missing 'id' query parameter (too long, wrong format) returns a validation error","Payment failure over x402 if insufficient USDC balance — call is rejected before data is returned","Unknown state ID returns empty data set or not-found error","Network or blockchain settlement timeout causing delayed or failed response","Signing service unavailability causing attestation failure"],"whenToPreferThis":"Choose this endpoint when you need official, government-sourced US state population data with cryptographic provenance and an on-chain payment trail — particularly when auditability, citation of authority, or machine-verifiable data integrity matters. It requires no API key or account, making it ideal for autonomous agents that can pay per call in USDC. Prefer it over unattested data APIs when compliance, reproducibility, or verifiable sourcing is a requirement.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-16T00:45:07.046Z","isFirstParty":false}