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Fathom Macroeconomic Data API — Category Tree
x402
Fathom Macroeconomic Data API — Category Tree is a paid API for AI agents from fredthom.vercel.app, paid per call via x402, $0.35/call, status unknown (last checked 2026-09-14).
Returns the hierarchical category tree of FRED economic data categories, starting from a given parent 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
Returns an object with a source identifier, an array of child category objects (each with name and ID), and the parent category ID that was queried — enabling navigation of the FRED category hierarchy.
Example use cases
Example prompt
“Show me all the subcategories under FRED's root economic data category so I can figure out which branch contains inflation and price index data.”
Technical details
Endpoint
POSThttps://fredthom.vercel.app/api/category-treeWhen to prefer
Use this endpoint when you need to discover or navigate the FRED macroeconomic data category hierarchy before fetching actual time series data — particularly useful as a first step to identify which category IDs to use in subsequent series queries.
Side effects
- Invalid or non-existent categoryId returns empty children array or error
- Network timeout on Vercel serverless cold start
- Payment failure via x402 protocol returns 402 status without data
- Malformed request body returns 400 error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| categoryId | string | Parent category ID (default: 0 for root) |
Output
Schema · Response
| Field | Type | Description |
|---|---|---|
| sourcerequired | string | |
| children | array | |
| parent_id | string |
Tags
x402
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