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Fathom Macroeconomic Data API — Tags Endpoint
x402
Fathom Macroeconomic Data API — Tags Endpoint 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).
Returns a list of available tags (category/topic labels) for browsing and filtering the 816,000+ FRED-powered economic time series
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 array of tag objects (each representing a category or topic label used to classify FRED economic time series) and a source identifier string indicating the data origin. Tags can be used to discover and filter specific economic time series data.
Example use cases
Discover inflation-related data categories
“I want to explore what inflation-related economic data is available — can you search Fathom's macroeconomic database for tags matching 'inflation' and list up to 30?”
Browse all macroeconomic topic labels
“Show me all the topic tags available in the Fathom macroeconomic database — give me up to 50 categories so I can figure out what economic time series I can pull.”
Find tags for unemployment research
“I'm doing research on labor markets — can you query Fathom's FRED database for tags related to 'unemployment' and return up to 25 results?”
Technical details
Endpoint
POSThttps://fathom-opal.vercel.app/api/tagsWhen to prefer
Choose this endpoint when you need to discover or browse the taxonomy of available economic data categories before querying specific time series. It is the right first step when you don't know the exact tag name and want to explore what macroeconomic topics (GDP, inflation, unemployment, interest rates) are indexed. Prefer this over directly querying series if you need to enumerate valid filter terms.
Side effects
- Empty tag list if search keyword matches nothing in the database
- Missing or malformed limit parameter may default to 50 results
- Service unavailability on the Vercel-hosted endpoint returning 5xx errors
- Payment failure if x402 USDC payment of $0.04 is not properly submitted
- Stale or cached results if the underlying FRED data source is not refreshed
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| limit | string | Max results (default: 50) |
| search | string | Filter tags by keyword |
Output
Schema · Response
| Field | Type | Description |
|---|---|---|
| tags | array | |
| sourcerequired | string |
Tags
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