# Federal Funds Rate - Current Rate and Trailing Series (FRED DFF)

> Federal Funds Rate - Current Rate and Trailing Series (FRED DFF) is a paid API for AI agents from agent402.tools, paid per call via x402, $0.005/call, status unknown (last checked 2026-10-10).

Returns the current effective federal funds rate plus a configurable trailing N-day historical series sourced from FRED DFF (Federal Reserve Board of Governors).

## Facts

- Endpoint: GET https://agent402.tools/api/fed-funds?utm_source=zero.xyz
- Price: $0.005/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-10
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/federal-funds-rate-current-rate-and-trailing-series-fred-dff-75a7dba7
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_qoRFSq9jfDoWG0iUn4yWP

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 federal-funds-rate-current-rate-and-trailing-series-fred-dff-75a7dba7
```

Example prompt: What's the current effective federal funds rate, and can you pull the trailing 60-day daily rate series from FRED so I can see how it's been trending?

## When to prefer this

Use this endpoint when you need the current effective federal funds rate or a historical daily series from the authoritative FRED DFF source. Prefer this over general financial data APIs when you specifically need the Federal Reserve's official benchmark rate with a clean trailing series for trend analysis, monetary policy research, or interest rate modeling.

## Known failure modes

- Invalid days parameter (outside 1-365 range) returns an error
- FRED data source temporarily unavailable causes fetch failure
- Missing or malformed query parameter falls back to 30-day default
- Payment not processed (x402 protocol) results in 402 response

## How this service works

Current effective federal funds rate (current, as of date, in percent) plus a trailing N-day history of {date, value}. Source: FRED DFF (Board of Governors), a daily series that includes weekends.

## Output

Returns the current effective federal funds rate and a trailing series of daily rate values (up to 365 days, defaulting to 30) sourced from the Federal Reserve's FRED DFF dataset, indexed by date.

## 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",
     "properties": {
      "days": {
       "type": "number",
       "description": "Trailing days to return (1-365, default 30)"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object",
     "required": [
      "date",
      "current",
      "days",
      "history",
      "source"
     ],
     "properties": {
      "date": {
       "type": "string"
      },
      "days": {
       "type": "integer"
      },
      "source": {
       "type": "string"
      },
      "current": {
       "type": "number"
      },
      "history": {
       "type": "array",
       "items": {
        "type": "object",
        "properties": {
         "date": {
          "type": "string"
         },
         "value": {
          "type": "number"
         }
        }
       }
      }
     }
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "date": "2026-06-17",
  "days": 30,
  "source": "FRED DFF",
  "current": 5.33,
  "history": [
   {
    "date": "2026-05-19",
    "value": 5.33
   }
  ]
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/federal-funds-rate-current-rate-and-trailing-series-fred-dff-75a7dba7/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)