---
title: "CDI interbank rate"
method: GET
path: "/api/v1/bcb/cdi"
tags: ["Central Banks & Monetary"]
---

# CDI interbank rate

`GET /api/v1/bcb/cdi`

Daily CDI (Certificado de Deposito Interbancario) rate, from BCB SGS series 12. Key reference for floating-rate corporate debt and private credit in Brazil.

## Query parameters

- `last_n` integer — Number of most-recent observations (upstream cap 20).

## Response `200`

Daily CDI observations (percent per day) ordered by ascending date.

- EnvelopeBcbCdiPayload
  - `data` BcbCdiPayload, required
    - `series` BcbObservation[], required — Daily CDI interbank rate (SGS 12, % daily).
      - `date` string, required — Observation date (YYYY-MM-DD, converted from BCB DD/MM/YYYY).
      - `value` union, required — Observation value (numeric when parseable, original string otherwise).
        - number
        - string
  - `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/4e2740743eb4/schema)