---
title: "Brazilian monetary aggregates M0-M4"
method: GET
path: "/api/v1/bcb/money-supply"
tags: ["Central Banks & Monetary"]
---

# Brazilian monetary aggregates M0-M4

`GET /api/v1/bcb/money-supply`

Monthly monetary aggregates from Banco Central do Brasil SGS. M0 = monetary base (27), M1 = narrow money (29), M2 = M1 + deposits (30), M3 = M2 + money market funds (31), M4 = M3 + public debt securities (32). Values in BRL millions.

## Query parameters

- `last_n` integer — Number of most-recent observations per aggregate.

## Response `200`

Monthly observations of M0, M1, M2, M3, M4 (BRL millions).

- EnvelopeBcbMoneySupplyPayload
  - `data` BcbMoneySupplyPayload, required
    - `m0` BcbObservation[], required — M0 monetary base (SGS 27, BRL millions).
      - `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
    - `m1` BcbObservation[], required — M1 narrow money (SGS 29, BRL millions).
      - `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
    - `m2` BcbObservation[], required — M2 - M1 plus savings and time deposits (SGS 30, BRL millions).
      - `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
    - `m3` BcbObservation[], required — M3 - M2 plus money market funds (SGS 31, BRL millions).
      - `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
    - `m4` BcbObservation[], required — M4 - M3 plus public debt securities (SGS 32, BRL millions).
      - `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. 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.

---

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