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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 fathom-opal.vercel.app, paid per call via x402, $0.04/call, status unknown (last checked 2026-09-14).
Retrieves the tags associated with a specific FRED economic data category by category 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 a list of tag objects associated with the specified FRED category, along with the category ID and the data source identifier (FRED). Each tag object contains metadata used to classify and describe the category's economic data series.
Example use cases
Exploring economic category taxonomy
“I want to know what tags FRED uses to classify the 'Money, Banking, & Finance' category — can you fetch the tags for category ID 32992 from Fathom?”
Building a macroeconomic data filter
“I'm building an economic data explorer and need the tags associated with FRED category 125 so I can group related time series — can you look those up?”
Auditing FRED category metadata
“Can you retrieve the classification tags for FRED category 33060 from the Fathom API? I want to verify how it's labeled before I index it in my database.”
Technical details
Endpoint
POSThttps://fathom-opal.vercel.app/api/category-tagsWhen to prefer
Use this endpoint when you need to discover how a specific FRED economic data category is tagged or classified — particularly useful for building data explorers, category browsers, or metadata indexing pipelines. Prefer this over general FRED direct access when you want a lightweight, pay-per-call interface without managing FRED API keys.
Side effects
- Invalid or nonexistent categoryId returns empty tags array or error
- Missing required categoryId field causes 400 bad request
- FRED upstream service unavailability may cause delayed or failed responses
- Category ID provided as integer instead of string may cause validation error
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
x402
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