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Fathom Macroeconomic Data API — Series Tags
x402
Fathom Macroeconomic Data API — Series Tags is a paid API for AI agents from fathoms.vercel.app, paid per call via x402, $0.04/call, status unknown (last checked 2026-09-14).
Retrieves the metadata tags associated with a FRED economic time series by its series ID
Price / call$0.04
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 an object containing an array of tag objects associated with the specified FRED series (each tag may include name, group_id, notes, created, popularity, and series_count fields), along with the source identifier and the series ID that was queried.
Example use cases
Categorize an inflation indicator
“What FRED tags are attached to the CPI series — look up the metadata tags for series ID 'CPIAUCSL' so I can see what categories and themes it belongs to.”
Explore unemployment series classification
“Can you fetch the FRED tags for the unemployment rate series 'UNRATE'? I want to understand how it's classified in the FRED database.”
Audit economic dataset taxonomy
“Pull the FRED metadata tags for the 10-year Treasury yield series 'DGS10' — I'm building a taxonomy of interest rate indicators and need to know how FRED categorizes it.”
Technical details
Endpoint
POSThttps://fathoms.vercel.app/api/series-tagsWhen to prefer
Use this endpoint when you need to understand the metadata classification, thematic grouping, or topic tags of a specific FRED economic time series. Prefer this over general series search when you already know the series ID and want to enrich it with tag/category context for filtering, taxonomy building, or dataset auditing. This is more targeted than a full series search and cheaper when you only need tag metadata.
Side effects
- Invalid or unknown FRED series ID returns empty tags array or error
- Missing required seriesId field returns validation error
- FRED upstream service unavailability causes timeout or 5xx error
- Misspelled series ID (e.g. lowercase when uppercase required) returns no results
- Rate limiting or payment failure results in 402 or 429 response
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| seriesIdrequired | string | FRED series ID |
Output
Schema · Response
| Field | Type | Description |
|---|---|---|
| tags | array | |
| sourcerequired | string | |
| series_id | string |
Tags
x402
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