{"uid":"cap_4clfS-Laqq17LI0PFVYCU","slug":"clink-forge-cpi-us-monthly-24340cc4","name":"Clink Forge CPI US Monthly","description":"Pay per call over x402. USDC on Base, no account, no API key. 28 government-sourced data products at $0.001–$0.05 per call, every response signed and provenance-chained.","url":"https://api.clinkforge.com/v1/p/cpi-us-monthly","method":"GET","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","properties":{"input":{"type":"object","properties":{"type":{"const":"http"},"method":{"const":"GET"},"queryParams":{"type":"object","required":["year"],"properties":{"year":{"type":"string","maxLength":7}},"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_FprOku3lV_TQZXqsIdpD-","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 US Consumer Price Index monthly data rows with cryptographic provenance and attestation, sold per-call via x402 micropayment.","exampleAgentPrompt":"Pull the US monthly CPI data for 2023 from Clink Forge — I need the figures with their cryptographic attestation so I can verify the source.","exampleUseCases":[{"title":"Inflation trend analysis for a report","prompt":"Get me the US monthly CPI figures for 2022 — I need each month's value along with the provenance details so I can cite the original source in my economic report."},{"title":"Compliance audit with verified data","prompt":"Fetch the US Consumer Price Index monthly data for 2021 with cryptographic attestation so our compliance team can verify the data hasn't been tampered with."},{"title":"Automated macro data pipeline","prompt":"Every month I need to pull the latest year's US CPI data from Clink Forge and store it in our pipeline — make sure we get the payment receipt and the Ed25519 signature each time."}],"resultDescription":"A JSON object containing an array of monthly CPI data rows (each with a payload and record ID), product metadata (slug and version), a provenance block (license ID, source URL, and observation timestamp), an Ed25519 cryptographic attestation signature, and a blockchain payment receipt reference confirming the x402 micropayment settlement.","failureModes":["Missing or invalid 'year' query parameter returns a validation error","Year out of available data range returns no rows or a 404-style error","Insufficient USDC balance or failed x402 payment results in a 402 Payment Required response","Malformed payment header causes authentication failure","Network timeout if the API is under load"],"whenToPreferThis":"Choose this endpoint when you need US monthly CPI data with cryptographic provenance and verifiable attestation — for example in compliance, audit, or automated pipelines where tamper-evidence matters. It is ideal for AI agents that can pay per-call via x402 micropayments in USDC and need a machine-readable proof of data origin. Prefer it over raw BLS scraping when you want structured JSON output, a signed attestation, and a payment receipt bundled in a single response.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-14T18:44:14.920Z","isFirstParty":false}