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Fathom Macroeconomic Data API — Series Tags Lookup
x402
Fathom Macroeconomic Data API — Series Tags Lookup 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 the tags associated with a specific FRED economic data series, given 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 a JSON object containing an array of tag objects associated with the requested FRED series (each tag describes a classification dimension such as topic, frequency, geography, or source), along with the series ID and the data source name.
Example use cases
Classifying an economic indicator
“Can you look up the tags for the FRED series CPIAUCSL so I can see how the consumer price index inflation series is categorized?”
Building a data discovery tool
“Fetch the taxonomy tags for the FRED series FEDFUNDS — I'm trying to understand what topics and categories the federal funds rate series belongs to.”
Verifying series metadata for a report
“Pull the tags associated with FRED series GDP for me — I want to confirm what classifications apply to it before I cite it in my economic analysis.”
Technical details
Endpoint
POSThttps://fathom-opal.vercel.app/api/series-tagsWhen to prefer
Use this endpoint when you need to discover how a FRED economic time series is classified or tagged — useful for building data catalogs, filtering series by topic or geography, or enriching metadata about a known series. Prefer this over a full series search when you already have the FRED series ID and only need its classification metadata.
Side effects
- Invalid or unknown FRED series ID returns an empty tags array or error
- Network timeout from upstream FRED API
- Missing required seriesId field returns a validation error
- FRED API rate limits or outages propagate as errors
- Payment failure (x402) if USDC balance is insufficient
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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