# Bcb-br-mcp — Brazilian Central Bank data (Selic, IPCA, FX, Focus survey, PTAX) inside Cursor, with provenance on every answer

**URL:** <https://forum.cursor.com/t/bcb-br-mcp-brazilian-central-bank-data-selic-ipca-fx-focus-survey-ptax-inside-cursor-with-provenance-on-every-answer/173076>\
**Category:** Built for Cursor\
**Tags:** mcp\
**Created:** [September 26, 2026, 5:14pm UTC](https://forum.cursor.com/t/bcb-br-mcp-brazilian-central-bank-data-selic-ipca-fx-focus-survey-ptax-inside-cursor-with-provenance-on-every-answer/173076 "2026-09-26T17:14:59Z")\
**Posts on this page:** 1\
**Page:** 1

<div class="post-metadata">

**Author:** ![SidneyBissoli](https://sea3.discourse-cdn.com/cursor1/user_avatar/forum.cursor.com/sidneybissoli/32/122172_2.png) [@SidneyBissoli](https://forum.cursor.com/u/SidneyBissoli)\
**Post date:** [September 26, 2026, 5:14pm UTC](https://forum.cursor.com/t/bcb-br-mcp-brazilian-central-bank-data-selic-ipca-fx-focus-survey-ptax-inside-cursor-with-provenance-on-every-answer/173076/1 "2026-09-26T17:14:59Z")

</div>

If you build anything that touches the Brazilian economy — pricing, fintech, reports, research — your agent eventually needs the official numbers from the Banco Central do Brasil: the Selic rate, IPCA inflation, exchange rates, GDP, credit aggregates, the Focus market-expectations survey and the PTAX reference rates.

`bcb-br-mcp` is an open-source MCP server that gives Cursor those numbers straight from the BCB’s public APIs, with 17 tools and no API key.

**Add it to Cursor** — `.cursor/mcp.json` in your project (or the global one):

```json
{
  "mcpServers": {
    "bcb-br": {
      "command": "npx",
      "args": ["-y", "bcb-br-mcp"]
    }
  }
}

```

Or point Cursor at the hosted endpoint, nothing to install:

```auto
https://bcb.sidneybissoli.com/mcp

```

**What you can ask the agent**

- “What is the current Selic rate and the accumulated IPCA over 12 months?”
- “Give me the USD/BRL PTAX for every business day of March 2026.”
- “What does the Focus survey expect for IPCA in 2026 and 2027?”
- “Deflate this series of nominal revenue to constant 2025 reais.”
- “Compare credit to households and credit to companies since 2020.”

**Why I built it instead of letting the model call the REST API directly**

The BCB APIs have sharp edges that silently produce wrong numbers: the time-series endpoint caps daily series at 10 years and returns an HTML page with HTTP 200 for unknown codes; `ultimos/N` returns some series newest-first and others oldest-first; price indexes (IPCA, IGP-M) are published as monthly rates, so “last minus first” gives nonsense (it reported +23.8% for IPCA 2024 when the real figure was 4.83%); the PTAX endpoint wants dates as MM-DD-YYYY and returns zero rows, not an error, otherwise. The server handles all of that on its side.

Every response carries a provenance block: the series, the period, the canonical URL that reproduces the query, the real extraction timestamp and the licence (ODbL). What the BCB published comes out verbatim; anything computed (variation, correlation, deflation) is marked as derived, with the convention used.

- Repo: [GitHub - SidneyBissoli/bcb-br-mcp: MCP server for Brazil Central Bank (BCB) data — Selic, IPCA, exchange rates, GDP for AI agents · GitHub](https://github.com/SidneyBissoli/bcb-br-mcp)
- npm: [https://www.npmjs.com/package/bcb-br-mcp](https://www.npmjs.com/package/bcb-br-mcp)
- Tool descriptions are in Portuguese (the users are mostly Brazilian); the agent handles them fine in English prompts.

Happy to hear what other Brazilian public data you would want an agent to reach.