---
title: "Single CAD FX pair history"
method: GET
path: "/api/v1/boc/fx/{pair}"
tags: ["Central Banks & Monetary"]
---

# Single CAD FX pair history

`GET /api/v1/boc/fx/{pair}`

Daily noon-rate history for a single CAD FX pair. Accepts any Valet FX code of the form `FX<CCY>CAD` (e.g. `FXUSDCAD`, `FXEURCAD`, `FXJPYCAD`). For the full list of valid pairs, call `/api/v1/boc/fx` or `/api/v1/boc/catalog`.

Returns CAD paid per unit of the counter currency.

## Path parameters

- `pair` string, required — Valet FX code, typically `FX<CCY>CAD`.

## Query parameters

- `recent_years` integer — Number of years of history.

## Response `200`

Daily noon-rate history for a single CAD FX pair.

- EnvelopeBocFxPairData
  - `data` BocFxPairData, required — Single CAD FX pair history.
    - `seriesDetail` object, required — Map of series code to metadata (label, frequency, unit).
    - `count` integer, required — Number of observations in this response.
    - `observations` BocObservation[], required — Array of observations, each with `d` plus one float per series code.
      - `d` string, nullable — Observation date (YYYY-MM-DD).
  - `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.
- `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.

---

[API](https://skmtc.net/sugra/apis/sugra-api.md) · [All operations](https://skmtc.net/sugra/apis/sugra-api/llms.txt) · [OpenAPI document](https://skmtc-service-staging.skmtc.workers.dev/v1/apis/sugra/sugra-api/versions/dcf7427e6897/schema)