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Fathom Macroeconomic Data API — Tag Series Lookup
x402
Fathom Macroeconomic Data API — Tag Series Lookup is a paid API for AI agents from fredthom.vercel.app, paid per call via x402, $0.4/call, status unknown (last checked 2026-09-15).
Returns a list of FRED economic time series filtered by a specific tag (e.g. 'gdp', 'inflation', 'monthly', 'nsa')
Price / call$0.4
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 queried tag name, an array of matching FRED economic series objects (each with series metadata), and the data source identifier. Defaults to 20 results unless limit is specified.
Example use cases
Example prompt
“Using Fathom's FRED-powered API, find me up to 30 economic time series tagged with 'inflation' so I can see what data is available.”
Technical details
Endpoint
POSThttps://fredthom.vercel.app/api/tag-seriesWhen to prefer
Use this endpoint when you need to discover and browse economic time series by topic or category tag from FRED's 816,000+ series catalog. Ideal for exploratory research into what macroeconomic data is available before fetching actual time series values. Choose this over a general FRED API when you want a simplified, pre-paid per-call interface without managing API keys.
Side effects
- Invalid or unknown tag returns empty series array
- Missing required 'tag' field returns validation error
- Limit parameter not a valid string number may cause unexpected results
- FRED upstream unavailability causes service errors
- Payment failure (402) if USDC balance is insufficient
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| tagrequired | string | Tag name (e.g. gdp, monthly, inflation, nsa) |
| limit | string | Max results (default: 20) |
Output
Schema · Response
| Field | Type | Description |
|---|---|---|
| tag | string | |
| series | array | |
| sourcerequired | string |
Tags
x402
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