# Bank of England IADB Exchange Rate Series

> Bank of England IADB Exchange Rate Series is a paid API for AI agents from api.chainmarket-api.workers.dev, paid per call via x402, $0.002/call, status unknown (last checked 2026-10-24).

Fetches historical Bank of England statistical time-series data (e.g. USD/GBP exchange rates) by series code for a configurable number of days

## Facts

- Endpoint: GET https://api.chainmarket-api.workers.dev/api/finance/bank-of-england-iadb?utm_source=zero.xyz
- Price: $0.002/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-24
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/bank-of-england-iadb-exchange-rate-series-4b49d366
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_ORalj2AttnybQV0T7J2-U

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 bank-of-england-iadb-exchange-rate-series-4b49d366
```

Example prompt: Fetch the last 60 days of USD/GBP exchange rate data from the Bank of England IADB using the XUDLUSS series.

## When to prefer this

Use this endpoint when you need official, authoritative historical exchange rate or macroeconomic time-series data directly from the Bank of England IADB, without requiring an API key or account signup. Ideal for AI agents needing pay-per-call access to UK central bank data for forex analysis, monetary policy research, or financial reporting. Prefer this over general forex APIs when the Bank of England is explicitly the required source.

## Known failure modes

- Invalid or unknown series code returns empty rows or an error
- Days parameter out of range (outside 1-365) may return a validation error
- Bank of England IADB source unavailable results in fetch failure
- No data available for the requested date range (e.g. weekends/holidays with no published values)
- Payment failure (insufficient USDC balance) results in HTTP 402 with no charge

## How this service works

Bank of England official daily statistics (IADB) for one series code (default XUDLUSS) over the last N days, from the Bank's CSV download. Values as published; no interpretation of the series.

## Output

A JSON object containing an array of date-value pairs for the requested Bank of England series, along with the series code, the source URL (bankofengland.co.uk IADB), and a checkedAt timestamp indicating when the data was retrieved.

## 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": [],
     "properties": {
      "days": {
       "type": "string",
       "description": "How many calendar days back to fetch, 1 to 365 (default 30)"
      },
      "series": {
       "type": "string",
       "description": "Bank of England series code, e.g. XUDLUSS (default)"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "rows": [
   {
    "date": "2026-09-23",
    "value": 1.3265
   },
   {
    "date": "2026-09-24",
    "value": 1.322
   }
  ],
  "series": "XUDLUSS",
  "source": "https://www.bankofengland.co.uk/boeapps/database/",
  "checkedAt": "2026-10-23T09:36:12.712Z"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/bank-of-england-iadb-exchange-rate-series-4b49d366/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.chainmarket-api.workers.dev](https://www.zero.xyz/host/api.chainmarket-api.workers.dev/llms.txt)