# Fathom Macroeconomic Data API — Bulk Series Fetch

> Fathom Macroeconomic Data API — Bulk Series Fetch is a paid API for AI agents from fathom-opal.vercel.app, paid per call via x402, $0.15/call, status unknown (last checked 2026-09-14).

Fetches multiple FRED economic time series in a single bulk request, returning recent observations for indicators like GDP, inflation, unemployment, and interest rates.

## Facts

- Endpoint: POST https://fathom-opal.vercel.app/api/bulk
- Price: $0.15/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-data-api-bulk-series-fetch-faf90dcf
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_w9WQOEm1F-oDcHhWantTb

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-bulk-series-fetch-faf90dcf -d '<json body>'
```

Example prompt: Can you pull the latest 10 observations for GDP, UNRATE, and CPIAUCSL from FRED so I can see how the economy has been trending?

## When to prefer this

Choose this endpoint when you need multiple FRED economic series in a single API call rather than making individual requests per series. It is ideal for macro dashboards, economic research agents, and any workflow requiring correlated indicators (e.g. GDP + inflation + unemployment together). Prefer it over single-series endpoints when batching 2+ FRED series, and over direct FRED API access when you need a simple pay-per-use wrapper without managing API keys.

## Known failure modes

- Invalid FRED series ID returns an error or empty result for that series
- Network or upstream FRED API unavailability causes request failure
- Requesting too many series in one call may cause timeouts
- Malformed request body (missing seriesIds array) returns a 400-level error
- Payment failure (insufficient USDC) blocks access

## How this service works

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

## Output

A JSON object with a 'source' field (e.g. 'FRED') and a 'results' object keyed by series ID, each containing recent observations (date and value pairs) for the requested economic time series.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "required": [
  "seriesIds"
 ],
 "properties": {
  "limit": {
   "type": "string",
   "description": "Observations per series (default: 5)"
  },
  "seriesIds": {
   "type": "array",
   "description": "Array of FRED series IDs (e.g. ['GDP', 'UNRATE', 'CPIAUCSL'])"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "object",
 "required": [
  "source"
 ],
 "properties": {
  "source": {
   "type": "string"
  },
  "results": {
   "type": "object"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/fathom-macroeconomic-data-api-bulk-series-fetch-faf90dcf/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)