---
title: "GBP exchange rates"
method: GET
path: "/api/v1/boe/fx"
tags: ["Central Banks & Monetary"]
---

# GBP exchange rates

`GET /api/v1/boe/fx`

GBP rates for 16 currencies: USD, EUR, JPY, CHF, CAD, AUD, HKD, SGD, SEK, NOK, DKK, CZK, PLN, TWD, INR + Sterling Effective Index.

## Query parameters

- `days` integer — Number of days (lookback or forecast horizon).

## Response `200`

Daily GBP exchange rates for 16 currencies.

- EnvelopeListBoeFxDatum
  - `data` BoeFxDatum[], required
    - `date` string, nullable — Observation date (YYYY-MM-DD).
    - `XUDLUSS` union — Sterling spot exchange rate vs USD.
      - integer
      - number
    - `XUDLERS` union — Sterling spot exchange rate vs EUR.
      - integer
      - number
    - `XUDLJYS` union — Sterling spot exchange rate vs JPY.
      - integer
      - number
    - `XUDLSFS` union — Sterling spot exchange rate vs CHF.
      - integer
      - number
    - `XUDLCDS` union — Sterling spot exchange rate vs CAD.
      - integer
      - number
    - `XUDLADS` union — Sterling spot exchange rate vs AUD.
      - integer
      - number
    - `XUDLHDS` union — Sterling spot exchange rate vs HKD.
      - integer
      - number
    - `XUDLSGS` union — Sterling spot exchange rate vs SGD.
      - integer
      - number
    - `XUDLSKS` union — Sterling spot exchange rate vs SEK.
      - integer
      - number
    - `XUDLNKS` union — Sterling spot exchange rate vs NOK.
      - integer
      - number
    - `XUDLDKS` union — Sterling spot exchange rate vs DKK.
      - integer
      - number
    - `XUDLBK25` union — Sterling effective exchange rate index (BK25).
      - integer
      - number
    - `XUDLBK47` union — Sterling effective exchange rate index (BK47).
      - integer
      - number
    - `XUDLTWS` union — Sterling trade-weighted index.
      - integer
      - number
    - `XUDLBK97` union — Sterling effective exchange rate index (BK97).
      - integer
      - number
    - `XUDLBK82` union — Sterling effective exchange rate index (BK82).
      - integer
      - number
  - `meta` SugraMeta, required — Metadata attached to every /api/v1/* response envelope.
    - `endpoint` string, required — Requested endpoint path.
    - `data_time` string, required — ISO 8601 UTC timestamp of the source data, not of the request.
    - `response_time` string, required — ISO 8601 UTC timestamp when this response was produced.
    - `provider` string, required — API name and version.
    - `source` string, nullable — Identifier of the primary upstream source used for this response.
    - `attribution` string, nullable — Human-readable attribution mandated by an upstream source (e.g. a securities regulator or self-regulatory organization). Present only on responses whose source requires the owner and source to be clearly identified. Do not remove or alter it when using the response.
    - `fallback_used` boolean, nullable — True when the primary source failed and a fallback produced the data.
    - `fallback_chain` string[], nullable — Ordered list of sources attempted, in the order they were tried.
    - `cached` boolean, nullable — True when this response was served from the internal cache.
    - `stale` boolean, nullable — True when the cached response was returned after the upstream rate-limited or errored. Clients can use this to detect degraded data.

## Other responses

- `401` — Missing or invalid `x-api-key` header. JSON body with a stable `code` distinguishing `missing_api_key` (no header sent) from `invalid_api_key` (header sent, key not accepted); any other 401 source carries the generic `unauthorized` with its detail as `reason`. Plus `hint`. `plan` is always null on 401 - an unauthenticated request has no plan; quota exhaustion is 429, not 401.
- `422` — Validation Error
- `429` — Daily rate limit exceeded. Check `X-RateLimit-Reset` for the next window.
- `503` — Upstream source is temporarily unavailable. Retry after a short delay.

## Changes

- **2026-08-28** `560e8847c7b3` — 34 breaking
  - the response property `data/items/XUDLADS` became optional for the status `200`
  - the response property `data/items/XUDLBK25` became optional for the status `200`
  - the response property `data/items/XUDLBK47` became optional for the status `200`
  - the response property `data/items/XUDLBK82` became optional for the status `200`
  - …30 more
- **2026-08-08** `4c4530760ba1` — 12 info
  - added the optional property `code` to the response with the `401` status
  - added the optional property `code` to the response with the `429` status
  - added the optional property `code` to the response with the `503` status
  - added the optional property `hint` to the response with the `401` status
  - …8 more

[Change history](https://skmtc.dev/sugra/apis/sugra-api/changes/api/v1/boe/fx/get.md)

---

[API](https://skmtc.dev/sugra/apis/sugra-api.md) · [All operations](https://skmtc.dev/sugra/apis/sugra-api/llms.txt) · [OpenAPI document](https://skmtc-service-production.skmtc.workers.dev/v1/apis/sugra/sugra-api/revisions/87582f2e0110/schema)