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Mercury402 FRED Series Data API
x402
Mercury402 FRED Series Data API is a paid API for AI agents from api.mercury402.com, paid per call via x402, $0.05/call, status unknown (last checked 2026-09-15).
Fetches Federal Reserve Economic Data (FRED) time-series observations for a specified series ID, optionally filtered by date range or limited in count.
Price / call$0.05
Success—
StatusUnknown
How this service works
76 live pay-per-call financial data APIs for AI agents. Treasury, FRED, forex, spreads, breakeven inflation, macro bundles, and composite dashboards. USDC on Base.
Output
Returns a JSON object containing the FRED series ID, a list of observations (each with a date and value), and realtime start/end timestamps indicating data vintage.
Example use cases
Unemployment trend analysis
“Get me the unemployment rate data from FRED — series UNRATE — for the last five years, from January 1, 2019 to December 31, 2023, with up to 60 observations, so I can chart the trend.”
Inflation indicator spot check
“Look up the FRED series CPIAUCSL for a single date, January 1, 2024, to get the latest CPI reading.”
Macro dashboard enrichment
“Fetch the FRED series FEDFUNDS — the federal funds rate — from March 1, 2022 through March 1, 2025, limit to 36 observations, so I can add it to my macro dashboard.”
Technical details
Endpoint
GEThttps://api.mercury402.com/v1/fred/%7Bseries_id%7DWhen to prefer
Choose this endpoint when you need structured, pay-per-call access to specific FRED economic time-series data without managing a FRED API key, especially in autonomous agent workflows that use x402 micropayments on Base. It's ideal when you need a single series by ID with optional date filtering and want machine-readable JSON output compatible with agent pipelines.
Side effects
- Invalid or unknown series_id returns an error or empty observations array
- Date range with no available data returns empty observations
- Malformed date strings (not YYYY-MM-DD) may cause query errors
- Payment failure (insufficient USDC balance) results in 402 response before data is returned
- Rate limits or upstream FRED API unavailability may cause timeouts
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| date | string | Single date observation (YYYY-MM-DD) |
| limit | integer | Max observations to return |
| observation_end | string | End date for range query (YYYY-MM-DD) |
| observation_start | string | Start date for range query (YYYY-MM-DD) |
Output
Schema · Response
{
"type": "json",
"example": {
"series_id": "UNRATE",
"observations": [
{
"date": "2024-01-01",
"value": "3.7"
}
],
"realtime_end": "2026-03-11",
"realtime_start": "2026-03-11"
}
}Tags
x402
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