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Fathom Macroeconomic Data API — Tag Series Search
x402
Fathom Macroeconomic Data API — Tag Series Search is a paid API for AI agents from fredfathom.vercel.app, paid per call via x402, $0.06/call, status unknown (last checked 2026-10-10).
Returns a list of FRED economic time series associated with a given tag (e.g. 'gdp', 'monthly', 'inflation', 'nsa')
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 tag name queried, an array of matching economic time series objects (each with series identifiers and metadata from FRED), and the data source attribution string.
Example use cases
Discover inflation data series
“I want to explore all the inflation-related time series available in FRED — can you pull up to 20 series tagged 'inflation' so I can see what datasets exist?”
Find monthly unemployment indicators
“Give me a list of FRED economic series tagged 'monthly' and 'unemployment' — I'm looking for the most relevant monthly unemployment datasets, show me up to 25.”
Explore GDP data series catalog
“What FRED time series are tagged with 'gdp'? Pull the top 20 so I can decide which GDP series to use for my economic model.”
Technical details
Endpoint
POSThttps://fredfathom.vercel.app/api/tag-series?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need to discover which FRED economic time series exist for a given thematic tag (e.g. 'gdp', 'inflation', 'nsa') rather than fetching a known series directly. It is ideal for exploration and catalog search before retrieving actual data values from a specific series.
Side effects
- Unknown or misspelled tag returns empty series array
- Missing required 'tag' field returns a validation error
- Limit parameter must be numeric string; invalid format may cause errors
- FRED backend downtime may cause upstream failures
- Very broad tags (e.g. 'annual') may return truncated results at default limit of 20
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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