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Fathom Macroeconomic Data API — Category Series
x402
Fathom Macroeconomic Data API — Category Series is a paid API for AI agents from fredfathom.vercel.app, paid per call via x402, $0.06/call, status unknown (last checked 2026-10-11).
Returns a list of FRED economic data series belonging to a specified FRED category ID
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 an array of economic time series objects (each with series metadata such as ID, name, frequency, units, and observation range), the source attribution, and the queried category ID. The series array is paginated by the limit parameter.
Example use cases
Exploring inflation data series
“Show me the first 30 economic time series under FRED category 32455 — I'm looking for inflation and price index series I can use for my analysis.”
Unemployment indicator discovery
“What economic time series are available in FRED category 12 for unemployment? Give me up to 20 results so I can see what's there.”
Interest rate series browsing
“List the economic data series in FRED category 22 — I want to find interest rate time series to track Fed policy changes.”
Technical details
Endpoint
POSThttps://fredfathom.vercel.app/api/category-series?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need to discover or enumerate available FRED economic time series within a known FRED category — for example, to browse what GDP, inflation, unemployment, or interest rate series exist before fetching actual observations. Prefer this over a general search when you already know the FRED category ID and want a structured list of its series. This is a discovery/browsing step, not for fetching time series data values themselves.
Side effects
- Invalid or nonexistent categoryId returns empty series array or error
- Omitting required categoryId field causes a 400/validation error
- Limit parameter out of range or non-numeric may cause unexpected results
- Upstream FRED API outage may cause degraded or failed responses
- Rate limiting or payment failures may block access
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| limit | string | Max results (default: 20) |
| categoryIdrequired | string | FRED category ID |
Output
Schema · Response
| Field | Type | Description |
|---|---|---|
| series | array | |
| sourcerequired | string | |
| category_id | string |
Tags
x402
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