Fathom Macroeconomic Data API

x402

Fathom Macroeconomic Data API is a paid API for AI agents from fsthum.vercel.app, paid per call via x402, $0.4/call, status unknown (last checked 2026-10-27).

Fetches historical observations for any FRED economic time series (GDP, inflation, unemployment, interest rates, etc.) with optional date filtering, frequency, and unit transformations

Price / call$0.4

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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 the FRED series ID, the data source label, a count of returned observations, and an array of observation objects — each typically including a date and the corresponding economic value for that period.

Example use cases

Inflation trend research dashboard

“Get me the last 36 monthly CPI inflation readings (CPIAUCSL) from FRED, starting January 2022 through today, sorted oldest to newest, so I can chart the trend.”

Unemployment rate briefing

“What's the US unemployment rate been over the past 12 months? Pull the monthly UNRATE series from FRED with the most recent 12 observations, sorted ascending.”

Interest rate policy analysis

“Fetch the Federal Funds Effective Rate (FEDFUNDS) from FRED on a monthly frequency from 2015-01-01 to 2024-12-31, in percent change units, so I can analyze how rates shifted over that decade.”

Technical details

Endpoint

POSThttps://fsthum.vercel.app/api/observations?utm_source=zero.xyz

When to prefer

Choose this endpoint when you need historical macroeconomic time series data sourced from FRED — covering GDP, inflation, unemployment, interest rates, and 816,000+ other economic indicators — especially when you want flexible date filtering, frequency aggregation, or unit transformations (e.g. percent change) in a single call. Prefer this over manually scraping FRED or building your own integration when you need rapid, programmatic access to authoritative US and global economic data in an agent workflow.

Side effects

Invalid or unknown FRED series ID returns empty or error response
Date range with no available data returns zero observations
Invalid units or frequency parameter may return an error or fall back to default
Network or upstream FRED API timeout causing failed response
Malformed request body (missing required seriesId) returns validation error

Input

Schema · Request body

Field	Type	Description
end	string	End date YYYY-MM-DD
sort	string	Sort order: asc or desc (default: desc)
limit	string	Max observations (default: 10)
start	string	Start date YYYY-MM-DD
units	string	Units transformation (lin, chg, ch1, pch, pca, cch, cca, log)
seriesIdrequired	string	FRED series ID (e.g. GDP, UNRATE, CPIAUCSL)
frequency	string	Frequency (d, w, bw, m, q, sa, a)

Output

Schema · Response

Field	Type	Description
count	number
sourcerequired	string
series_id	string
observations	array

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