# Fathom Macroeconomic Calendar API

> Fathom Macroeconomic Calendar API is a paid API for AI agents from fathom-opal.vercel.app, paid per call via x402, $0.08/call, status unknown (last checked 2026-09-14).

Retrieves upcoming macroeconomic calendar events (economic releases, announcements) powered by FRED data

## Facts

- Endpoint: POST https://fathom-opal.vercel.app/api/calendar
- Price: $0.08/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/fathom-macroeconomic-calendar-api-09d4c783
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_MxKP94-kmVWZbG8Tt2cKK

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-calendar-api-09d4c783 -d '<json body>'
```

Example prompt: Can you pull up the next 20 upcoming macroeconomic calendar events from Fathom — things like scheduled GDP releases, inflation reports, and interest rate decisions?

## When to prefer this

Use this endpoint when you need to discover upcoming scheduled macroeconomic data release events (e.g., GDP, CPI, unemployment, FOMC decisions) rather than fetching historical time-series values. It is ideal for economic calendars, pre-market briefings, or scheduling workflows around data releases. Prefer this over general FRED time-series queries when the goal is 'what is coming next' rather than 'what happened historically'.

## Known failure modes

- Invalid limit parameter type (must be a string representation of an integer)
- Empty events array if no upcoming events are scheduled in the data feed
- Payment failure if x402 USDC payment of $0.08 is not processed correctly
- Service unavailability on Vercel deployment causing 5xx errors
- FRED upstream data outage causing stale or missing calendar data

## 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 macroeconomic calendar events (such as scheduled GDP releases, CPI announcements, unemployment reports, interest rate decisions) along with a source attribution string identifying the data provider.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "limit": {
   "type": "string",
   "description": "Max results (default: 15)"
  }
 }
}
```

## Response schema (JSON Schema)

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

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/fathom-macroeconomic-calendar-api-09d4c783/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from fathom-opal.vercel.app](https://www.zero.xyz/host/fathom-opal.vercel.app/llms.txt)