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Fathom Macroeconomic Data API — Vintage Dates
x402
Fathom Macroeconomic Data API — Vintage Dates is a paid API for AI agents from fathoms.vercel.app, paid per call via x402, $0.06/call, status unknown (last checked 2026-09-14).
Retrieves vintage date history for a FRED economic time series, showing when data was published or revised over time
Price / call$0.06
Success—
StatusUnknown
How this service works
Free macroeconomic data API powered by FRED. 816,000+ economic time series. GDP, inflation, unemployment, interest rates, and more.
Output
Returns a JSON object containing the FRED series ID, the data source label, and an array of vintage date objects representing each point in time when the series data was published or revised. Each item in the vintage_dates array reflects a distinct data release or revision event.
Example use cases
Track GDP revision history
“Get the vintage dates for the FRED series GDP — show me the last 15 dates so I can see when quarterly GDP data has been revised.”
Monitor CPI publication timeline
“Fetch the publication and revision history for the FRED series CPIAUCSL — give me 10 vintage dates so I can track when inflation data was officially released.”
Research Fed funds rate data revisions
“Look up vintage dates for FEDFUNDS in FRED — I need to know when the federal funds rate time series data was last revised, up to 20 results.”
Technical details
Endpoint
POSThttps://fathoms.vercel.app/api/vintageWhen to prefer
Choose this endpoint when you need to understand the revision history or publication timeline of a specific FRED economic series — particularly useful for data quality analysis, backtesting economic models with real-time data vintages, or auditing when official statistics were released or revised. Prefer this over a general series data endpoint when your goal is metadata about data provenance rather than the data values themselves.
Side effects
- Invalid or unknown FRED series ID returns an error or empty result
- Malformed seriesId causes request rejection
- Limit parameter set to a non-numeric string may be ignored or cause error
- FRED upstream service unavailability may result in timeout or 5xx error
- Request without required seriesId field returns validation error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| limit | string | Max results (default: 10) |
| seriesIdrequired | string | FRED series ID |
Output
Schema · Response
| Field | Type | Description |
|---|---|---|
| sourcerequired | string | |
| series_id | string | |
| vintage_dates | array |
Tags
x402
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