{"uid":"cap_mBvns_R_SLLvQlOLF5H4t","slug":"fathom-macroeconomic-data-api-vintage-series-dfa64de8","name":"Fathom Macroeconomic Data API — Vintage Series","description":"Free macroeconomic data API powered by FRED. 816,000+ economic time series. GDP, inflation, unemployment, interest rates, and more.","url":"https://fsthum.vercel.app/api/vintage?utm_source=zero.xyz","method":"POST","headers":{},"bodySchema":{"type":"object","required":["seriesId"],"properties":{"limit":{"type":"string","description":"Max results (default: 10)"},"seriesId":{"type":"string","description":"FRED series ID"}}},"responseSchema":{"type":"object","required":["source"],"properties":{"source":{"type":"string"},"series_id":{"type":"string"},"vintage_dates":{"type":"array","items":{"type":"object"}}}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.4","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"registry","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":"$0.4/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.4","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.4","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_dix_1IsU_ML76Y2Tgvcfo","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.4","costPer":"request","priority":0,"asset":null,"unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Retrieves vintage date data for a specific FRED economic time series, returning historical revision snapshots for macroeconomic indicators.","exampleAgentPrompt":"Pull the vintage date history for the FRED series GDPC1 — I want to see the last 10 revision snapshots for US real GDP.","exampleUseCases":[{"title":"GDP revision history analysis","prompt":"Can you fetch the vintage dates for FRED series GDPC1 so I can see how the US real GDP estimates have been revised over time? Give me the last 10 vintages."},{"title":"Inflation data snapshot retrieval","prompt":"Get me the vintage date snapshots for the FRED series CPIAUCSL — I need to see the historical revisions to the consumer price index, limit it to 5 results."},{"title":"Unemployment rate revision tracking","prompt":"Pull the vintage dates for UNRATE from FRED — I want to track how the unemployment rate data has been revised historically, show me up to 20 entries."}],"resultDescription":"Returns a JSON object containing the source name, the requested FRED series ID, and an array of vintage date objects representing historical data revision snapshots for that economic time series.","failureModes":["Invalid or unknown FRED series ID returns an error or empty result","Missing required seriesId field causes a validation error","Limit parameter set too high may cause slow responses or truncated results","Network or upstream FRED API unavailability causes request failure","Malformed request body returns a 400-level error"],"whenToPreferThis":"Choose this endpoint when you need historical revision snapshots (vintage dates) for a specific FRED macroeconomic series — particularly useful for understanding how economic data estimates have been revised over time. Prefer this over general data lookups when the focus is on data revisions rather than just current values, and when the FRED series ID is already known.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-29T13:04:42.149Z","isFirstParty":false,"canonicalSlug":"fathom-macroeconomic-data-api-vintage-series-dfa64de8"}