---
title: "Euro area yield curve"
method: GET
path: "/api/v1/ecb/yield-curve"
tags: ["Central Banks & Monetary"]
---

# Euro area yield curve

`GET /api/v1/ecb/yield-curve`

Euro area government bond yield curve (ECB YC dataflow). One row per maturity with maturity as 'year_N'/'month_N' and rate as a decimal fraction. Resolves the latest available date when none is given.

## Query parameters

- `date` string, nullable — Curve date (YYYY-MM-DD). Latest available if omitted.
- `rating` string — Bond rating: aaa or all_ratings.
- `yield_curve_type` string — spot_rate, instantaneous_forward, or par_yield.

## Response `200`

Per-maturity yield curve points for the requested date.

- EnvelopeStubData
  - `data` StubData, required — Response shape not yet documented; fields are returned as-is.
  - `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)