Efi

v0.2.0OAuth2

Direct Pix via BCB, charges, and carnets. One of the first fintechs authorized as a PSP by the Brazilian Central Bank.

18 tools1 env vars🇧🇷 Brazilstable on npm

Install

terminal

$ npm install @codespar/mcp-efi

Quickstart

Add this entry to your claude_desktop_config.json (or any MCP-compatible client config).

claude_desktop_config.json

{
  "mcpServers": {
    "efi": {
      "command": "npx",
      "args": [
        "-y",
        "@codespar/mcp-efi"
      ],
      "env": {
        "EFI_CLIENT_SECRET": "<your_efi_client_secret>"
      }
    }
  }
}

After restart, your agent can call any of the 18 tools below — try create_cob first.

Environment variables · 1

Required to authenticate the server. Stored encrypted when using CodeSpar managed hosting.

EFI_CLIENT_SECRET

requiredsecret

API key for efi

Available tools · 18

Each tool is independent — your agent loads only what it needs to reduce context and response time.

WRITEcreate_cob

Create an immediate Pix charge (cobranca imediata)

READget_cob

Get Pix charge details by txid

READlist_cobs

List Pix charges by date range

WRITEcreate_charge

Create a billing charge (boleto or credit card)

WRITEget_charge

Get charge details by ID

WRITEcreate_carnet

Create a carnet (payment booklet with multiple parcels)

READget_pix_key

Get details of a registered Pix key

WRITEcreate_pix_evp

Create a random Pix key (EVP/alias)

Compatible frameworks

MCP is a protocol — any framework that speaks it can mount this server.

Claude Agent SDKAnthropic

OpenAI AgentsOpenAI

Vercel AI SDKVercel

LangChainLangChain

LlamaIndexLlamaIndex

CrewAICrewAI

MastraMastra

Any MCP clientProtocol

Frequently asked questions

All credentials are encrypted at rest in an isolated vault scoped per organization. OAuth2 tokens are automatically refreshed before expiry. Your agent code never sees raw secrets — it receives scoped, short-lived session tokens.