Renda Fixa

br.api.rendafixaPublished by rendafixa.api.brOfficial publisherv1.0.0Updated Oct 24, 2026

Brazilian fixed income (CDB, LCI, LCA, CRI, CRA, Tesouro) ranked by net-of-tax and real return.

VerifiedStreamable HTTPWeb executableFinanceData & Analytics

Overview

AI-generated overview

Remote MCP server that lets an assistant search and rank Brazilian fixed-income bonds by net-of-tax and real return.

What you can do
  • Search and rank active Brazilian fixed-income bonds (CDB, LCI, LCA, CRI, CRA, debentures, Tesouro) with filters for product, index, issuer, tax exemption and FGC coverage.
  • Compare bonds using precomputed net annualized return after income tax and real return above IPCA.
  • List the banks and brokers in the dataset with their numeric codes and bond counts, to use as issuer filters.
When to use it
Useful when someone wants to compare Brazilian fixed-income products, find the highest-yielding tax-exempt or FGC-covered bonds, or filter by issuer, index or maturity inside an AI assistant.
Requirements
Remote streamable HTTP endpoint; no local install. An optional Authorization header with a Bearer API key from the provider's site unlocks the full dataset; without it only a 5-bond preview is returned. A paid plan is needed for a key.
Before you install
The API key is a secret sent in the Authorization header (or as a key query parameter for URL-only connectors); keep it out of shared configs. Full data requires an active subscription, so there is a cost. The server is read-only and returns investment data, not advice; returns are projections based on central bank Focus estimates.

Installation

In SourceWeft

  1. Open Renda Fixa in the dashboard and add it to a workspace.
  2. Enable the server for the chats that should use its tools.

Web executable via Streamable HTTP. Remote servers run from the web runtime once configured in a workspace.

Use with an agent

Paste this prompt into Claude Code, Codex, Cursor or another agent — or into SourceWeft chat. The agent reads this server's install guide, shows you its publisher, endpoint and sign-in, and adds it to your client once you agree. Keys never go into a command.

Read https://sourceweft.com/mcp/br.api.rendafixa%2Frenda-fixa/install.md and connect the MCP server it describes to my client. Before changing any config, show me its publisher, endpoint and sign-in method and wait for my OK. Never put an API key in a command or in a file I would commit; ask me where it should come from.

Read the install guide the agent follows

Other MCP clients

Add this to your client's mcpServers config.

{
  "mcpServers": {
    "renda-fixa": {
      "type": "http",
      "url": "https://rendafixa.api.br/mcp"
    }
  }
}

README

Renda Fixa API

Títulos de renda fixa do Brasil em uma chamada — CDB, LCI, LCA, CRI, CRA, debêntures e Tesouro Direto de vários bancos e corretoras, com retorno líquido após IR e ganho real acima do IPCA já calculados a partir das projeções do Boletim Focus (Banco Central). Atualizado diariamente.

  • REST/JSON — GET https://rendafixa.api.br/api/
  • CSV para planilhas — Google Sheets e Excel, sem programar
  • Servidor MCP — use no Claude, ChatGPT, Cursor e outros assistentes de IA
  • OpenAPI 3.1 — openapi.json

📖 Documentação: https://rendafixa.api.br/docs/api · 💳 Planos: https://rendafixa.api.br/pricing

Experimente agora (sem chave)

Sem chave, a API responde com uma prévia de 5 títulos:

bash
curl "https://rendafixa.api.br/api/"
json
{  "response": { "status": "preview", "description": "No API key provided. Showing up to 5 bonds as a preview." },  "bonds": [    {      "name": "CDB 360 DIAS",      "bank": 77,      "bank_name": "Banco Inter",      "product": "cdb",      "index": "cdi*",      "rate": 1.05,      "fgc_protection": true,      "tax_free": false,      "min_investment": 100,      "maturity_date": "2027-05-08",      "rating": "AA+",      "net_annualized_return": 0.1165,      "real_annualized_return": 0.0676    }  ]}

Com uma chave de uma conta com assinatura ativa, a resposta traz todos os títulos. Gere a sua em rendafixa.api.br/user/api-keys.

bash
curl -H "Authorization: Bearer rf_SUA_CHAVE" \     "https://rendafixa.api.br/api/?product=lci,lca&tax_free=1&fgc=1"

Filtros

ParâmetroValores
productcdb, lci, lca, cri, cra, deb, tpf, td, lf, misclista separada por vírgula
indexcdi*, cdi+, ipca*, ipca+, selic*, selic+, precodifique + como %2B
bankcódigos numéricosex.: 341 Itaú, 77 Inter, 208 BTG
tax_free0 / 1só tributados / só isentos de IR
fgc0 / 1sem / com cobertura do FGC
formatjson / csv

Taxas e retornos são decimais: 0.1165 = 11,65% a.a. Detalhes de cada campo e de como os retornos são calculados estão na documentação.

Exemplos

Os títulos isentos de IR que mais rendem, sem nenhuma dependência:

bash
RENDAFIXA_KEY=rf_SUA_CHAVE python examples/python/melhores_isentos.py

Planilhas

Google Sheets (planilha em português):

=IMPORTDATA("https://rendafixa.api.br/api/?format=csv&locale=pt-BR&key=rf_SUA_CHAVE")

Em uma planilha em inglês, tire o &locale=pt-BR. Os filtros funcionam na mesma URL: &product=lci,lca&tax_free=1.

Excel: Dados → Da Web → cole a URL acima.

Assistentes de IA (MCP)

A API também é um servidor MCP remoto: https://rendafixa.api.br/mcp. Depois de adicionado, é só perguntar — "qual LCI com FGC rende mais em até 2 anos?".

Claude Code

bash
claude mcp add --transport http rendafixa https://rendafixa.api.br/mcp \  --header "Authorization: Bearer rf_SUA_CHAVE"

Cursor (.cursor/mcp.json) e outros clientes com configuração em JSON

json
{  "mcpServers": {    "rendafixa": {      "url": "https://rendafixa.api.br/mcp",      "headers": { "Authorization": "Bearer rf_SUA_CHAVE" }    }  }}

Claude.ai e ChatGPT (conectores personalizados, que aceitam só uma URL): https://rendafixa.api.br/mcp?key=rf_SUA_CHAVE

Ferramentas: search_bonds (filtra e ordena por retorno líquido, ganho real, vencimento ou aplicação mínima) e list_issuers (bancos e códigos). Sem chave, a prévia.

Licença

Os exemplos deste repositório são MIT. O uso da API está sujeito aos planos e termos do Renda Fixa.

Source: README.md at commit b0c37a8

Tools

2

search_bonds

Buscar títulos de renda fixa

Search active Brazilian fixed-income bonds and rank them. Every bond comes with net_annualized_return (after IR, to maturity) and real_annualized_return (above IPCA), both decimals. 'rate' depends on 'index': cdi* 1.05 = 105% of CDI, cdi+ 0.02 = CDI + 2% a.a., ipca+ 0.06 = IPCA + 6% a.a., pre 0.13 = 13% a.a. fixed. Without an API key the result is a short preview.

Parametersfgcbankindexlimitproductsort_bytax_freemax_yearsmax_min_investment

list_issuers

Listar emissores e corretoras

List the banks/brokers present in the data with their numeric codes and how many bonds each has, to use as the 'bank' filter of search_bonds.

Takes no parameters.

Version history

1
  1. v1.0.0LatestOct 9, 2026

Score

100% of the applicable checks met

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  • Tools listedRequired15 pts
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