{"uid":"cap_VegDCLWmI-gqy-36MTTi6","slug":"clink-forge-state-gdp-series-4e983b85","name":"Clink Forge State GDP Series","description":"Pay per call over x402. USDC on Base, no account, no API key. 28 government-sourced data products at $0.001–$0.05 per call, every response signed and provenance-chained.","url":"https://api.clinkforge.com/v1/p/state-gdp-series","method":"GET","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","properties":{"input":{"type":"object","properties":{"type":{"const":"http"},"method":{"const":"GET"},"queryParams":{"type":"object","required":[],"properties":{"end":{"type":"string","maxLength":10},"start":{"type":"string","maxLength":10},"entity":{"type":"string","maxLength":8}},"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":"0.005","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":"$0.005/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.005","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.005","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_ELgg22C7TsqTfv3Cr2wDs","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.005","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Retrieves a time-series of U.S. state-level GDP data from government sources, with cryptographic provenance and attestation, paid per-call via x402/USDC.","exampleAgentPrompt":"Pull the state GDP time series for California from 2015 to 2023 — I need the data with full cryptographic provenance so I can verify it came from a government source.","exampleUseCases":[{"title":"State economic trend analysis","prompt":"Get me the GDP series for Texas from 2010 to 2022 with provenance, so I can chart how the state economy grew over that period."},{"title":"Multi-state GDP comparison research","prompt":"Fetch the GDP time series for New York from 2018 to 2023 — I want the signed, government-sourced data so I can compare it against other states reliably."},{"title":"Verifiable data for automated reporting","prompt":"Retrieve the state GDP series for Florida from 2020 to 2023 with the full attestation signature — my pipeline needs cryptographic proof that the data came from an official government source."}],"resultDescription":"Returns an array of GDP data rows for the specified state and date range, along with a provenance chain (source URL, observing authority, hash, and timestamp), a cryptographic attestation (signature, result digest, signing key ID), and a payment receipt confirming the $0.02 USDC per-call transaction. Each record includes a unique record ID.","failureModes":["Payment not settled — x402 payment flow fails or USDC balance insufficient, resulting in 402 response with no data","Invalid entity code — unrecognized state code returns empty data or error","Date range out of bounds — start/end dates outside available data window return empty rows","Network timeout — upstream government data source temporarily unavailable","Malformed query parameters — non-ISO date strings or oversized entity codes rejected at schema validation"],"whenToPreferThis":"Choose this endpoint when you need U.S. state-level GDP time series data with cryptographic provenance and attestation — especially when downstream consumers need to verify data authenticity without trusting a centralized API key-gated provider. Ideal for autonomous agents that can pay per-call in USDC without account setup, and for pipelines that require auditable, signed government-sourced economic data. Prefer alternatives if you need real-time GDP estimates, non-U.S. GDP data, or GDP at the county/metro level.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-15T00:48:55.155Z","isFirstParty":false}