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Fathom Macroeconomic Data API — Category Tags
x402
Fathom Macroeconomic Data API — Category Tags is a paid API for AI agents from frederalfathom.vercel.app, paid per call via x402, $0.35/call, status unknown (last checked 2026-10-31).
Retrieves the tags associated with a specific FRED economic data category by category ID
Price / call$0.35
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
An object containing an array of tag objects associated with the specified FRED category, the source identifier (FRED), and the echoed category ID. Tags typically include metadata like tag names, groupings, and notes used to classify and discover economic data series within that category.
Example use cases
Exploring GDP data taxonomy
“What tags does FRED use to classify its GDP data category? I want to understand how it's labeled and organized.”
Building economic data search filters
“I'm building a search tool — can you pull the tags for FRED category 125 so I know what keywords to use to filter relevant economic series?”
Auditing category metadata for research
“I need to verify the tags assigned to FRED's unemployment category, ID 10. Can you fetch those tags so I can document how the data is classified?”
Technical details
Endpoint
POSThttps://frederalfathom.vercel.app/api/category-tags?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need to explore or enumerate the metadata tags that classify a known FRED economic data category — for example, when building search filters, auditing category taxonomy, or discovering related data series. Prefer it over series-level endpoints when your goal is category-level classification rather than actual time series data.
Side effects
- Invalid or non-existent FRED category ID returns an error or empty tag array
- Missing required categoryId field causes a 400 validation error
- FRED upstream API downtime or rate limits may result in a failed or delayed response
- Very broad or root-level categories may return a very large number of tags
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| categoryIdrequired | string | FRED category ID |
Output
Schema · Response
| Field | Type | Description |
|---|---|---|
| tags | array | |
| sourcerequired | string | |
| category_id | string |
Tags
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