# FRED Economic Series Search

> FRED Economic Series Search is a paid API for AI agents from agent402.tools, paid per call via x402, $0.005/call, status unknown (last checked 2026-09-14).

Full-text search across FRED's ~800,000 economic time series, returning series IDs, titles, frequency, units, and popularity scores

## Facts

- Endpoint: GET https://agent402.tools/api/fred-search
- Price: $0.005/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/fred-economic-series-search-6558def2
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_qP20LmEGNe6QsZyW1ECTi

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 fred-economic-series-search-6558def2
```

Example prompt: Search FRED for economic time series related to 'unemployment rate' and give me the top 5 results including their series IDs, titles, frequencies, and units.

## When to prefer this

Use this endpoint when you need to discover FRED economic time series by keyword before fetching actual data. Ideal as the first step in a two-call workflow: search here to get a series ID, then call /api/fred-series to retrieve the actual data values. Prefer this over manually guessing FRED series IDs, which are non-obvious alphanumeric codes.

## Known failure modes

- Missing required 'q' query parameter returns an error
- Limit outside 1-100 range may return an error or be clamped
- Obscure or misspelled search terms may return zero results
- Payment of 0.005 USDC required; unpaid requests return 402 Payment Required
- Network timeout if FRED upstream is slow

## How this service works

Full-text search across FRED's ~800,000 economic time series. Returns series IDs (use with /api/fred-series), titles, frequency, units, and a popularity score. ?q=unemployment+rate&limit=10 This product uses the FRED(R) API but is not endorsed or certified by the Federal Reserve Bank of St. Louis.

## Output

A list of up to 100 FRED economic time series entries, each containing a series ID (usable with companion /api/fred-series endpoint), human-readable title, data frequency (e.g. monthly, quarterly), measurement units, and a popularity score indicating how widely used the series is.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [
      "q"
     ],
     "properties": {
      "q": {
       "type": "string",
       "description": "Search text"
      },
      "limit": {
       "type": "number",
       "description": "Results to return, 1-100 (default 10)"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object",
     "required": [
      "query",
      "count",
      "results"
     ],
     "properties": {
      "count": {
       "type": "integer"
      },
      "query": {
       "type": "string"
      },
      "results": {
       "type": "array",
       "items": {
        "type": "object",
        "properties": {
         "id": {
          "type": "string"
         },
         "title": {
          "type": "string"
         },
         "units": {
          "type": "string"
         },
         "frequency": {
          "type": "string"
         },
         "popularity": {
          "type": "integer"
         }
        }
       }
      }
     }
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "count": 5,
  "query": "consumer price index",
  "results": [
   {
    "id": "CPIAUCSL",
    "title": "Consumer Price Index for All Urban Consumers: All Items",
    "units": "Index 1982-1984=100",
    "frequency": "Monthly",
    "popularity": 95
   }
  ]
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/fred-economic-series-search-6558def2/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from agent402.tools](https://www.zero.xyz/host/agent402.tools/llms.txt)