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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 fathom-opal.vercel.app, paid per call via x402, $0.06/call, status unknown (last checked 2026-09-14).
Returns the list of vintage dates (data release timestamps) for a given FRED economic time series, showing when historical data was revised or published
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 data source label, the FRED series ID, and an array of vintage date objects — each representing a date when the time series data was released, revised, or updated by the original data provider.
Example use cases
GDP revision history for research
“I'm writing an economics paper and need to know all the dates when real GDP data (FRED series GDPC1) was revised — can you fetch the vintage dates, up to 50 entries?”
Inflation data release tracking
“Pull the vintage dates for the CPIAUCSL series from FRED so I can see exactly when CPI inflation data was published or updated historically — give me the last 15.”
Unemployment data revision audit
“I need to audit when the UNRATE unemployment series was revised over time — can you get me the vintage dates for that FRED series, showing 25 results?”
Technical details
Endpoint
POSThttps://fathom-opal.vercel.app/api/vintageWhen to prefer
Choose this endpoint when you specifically need to know WHEN a FRED economic time series was published or revised — i.e., its vintage dates — rather than the actual data values. Ideal for macroeconomic research requiring data revision history, real-time data analysis, or understanding how estimates were updated over time. Prefer this over general FRED wrappers if you need a pay-per-call, no-subscription model with USDC micropayments via x402.
Side effects
- Invalid or unknown FRED series ID returns an error or empty result
- Limit parameter ignored or causing unexpected truncation if malformed
- Network timeout from the Vercel serverless deployment under cold-start conditions
- FRED upstream API outage causing data unavailability
- Payment failure via x402 protocol blocking the request
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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