# Fathom Macroeconomic Data API — Release Dates

> Fathom Macroeconomic Data API — Release Dates is a paid API for AI agents from fredthom.vercel.app, paid per call via x402, $0.4/call, status unknown (last checked 2026-09-15).

Returns the scheduled and historical release dates for a specific FRED economic data release, given a release ID

## Facts

- Endpoint: POST https://fredthom.vercel.app/api/release-dates
- Price: $0.4/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/fathom-macroeconomic-data-api-release-dates-4340be93
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_MfWrt0VrWrrWZHZ0izTsp

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability fathom-macroeconomic-data-api-release-dates-4340be93 -d '<json body>'
```

Example prompt: Can you pull the last 5 release dates for FRED release ID 21 — I want to see when the GDP data has been published recently?

## When to prefer this

Use this endpoint when you need to know the publication schedule or historical release dates for a specific macroeconomic data series from FRED — for example, to track when GDP, CPI, or unemployment figures are published. Prefer this over general time-series endpoints when your goal is scheduling/calendar metadata about a release rather than the actual data values.

## Known failure modes

- Missing or invalid releaseId returns an error — FRED release IDs must be valid numeric identifiers
- No release dates found for a valid but obscure release ID returns an empty dates array
- Limit parameter ignored or defaulted to 10 if not supplied or malformed
- Network/service unavailability on Vercel hosting returns 5xx error
- Payment not processed (x402 protocol failure) results in 402 response before data is returned

## How this service works

Free macroeconomic data API powered by FRED. 816,000+ economic time series. GDP, inflation, unemployment, interest rates, and more.

## Output

An array of release date objects for the specified FRED release, along with the source identifier and release ID. Each item in the dates array contains scheduling/publication date information for that economic data release.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "required": [
  "releaseId"
 ],
 "properties": {
  "limit": {
   "type": "string",
   "description": "Max results (default: 10)"
  },
  "releaseId": {
   "type": "string",
   "description": "FRED release ID"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "object",
 "required": [
  "source"
 ],
 "properties": {
  "dates": {
   "type": "array",
   "items": {
    "type": "object"
   }
  },
  "source": {
   "type": "string"
  },
  "release_id": {
   "type": "string"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/fathom-macroeconomic-data-api-release-dates-4340be93/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from fredthom.vercel.app](https://www.zero.xyz/host/fredthom.vercel.app/llms.txt)