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C6

C6 Bank

v0.1.0-alpha.2OAuth2alpha

BR digital bank (JPMorgan-backed). BaaS for Pix, DICT, boleto, accounts. OAuth2 + mTLS. Alpha — developers.c6bank.com.br contract-gated, paths follow BACEN Pix v2 + C6 BaaS conventions.

14 tools5 env vars🇧🇷 Brazilalpha — pending validation

What your agent can do

C6 Bank gives your agent 14 tools it calls directly — pick the ones it needs, in Claude, Cursor, or any MCP client.

  • get_oauth_tokenMint or return a cached OAuth2 client_credentials bearer token for the C6 Developer Portal. Exposed so agents can inspect token freshness; normal tool calls obtain tokens implicitly.
  • create_pix_cobCreate a Pix immediate charge (cob) with QR code. Returns the txid, copy-paste EMV payload, and location URL per BACEN Pix v2.
  • get_pix_cobRetrieve a Pix immediate charge (cob) by its txid.
Example call
// Your agent calls a tool directly — no glue code.
// CodeSpar's managed tier handles OAuth2, token rotation and rate limits.
const result = await session.call("get_oauth_token", { /* ... */ });

Install

terminal
$ npm install @codespar/mcp-c6@alpha

Quickstart

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

claude_desktop_config.json
{
  "mcpServers": {
    "c6": {
      "command": "npx",
      "args": [
        "-y",
        "@codespar/mcp-c6@alpha"
      ],
      "env": {
        "C6_CLIENT_ID": "<your_c6_client_id>",
        "C6_CLIENT_SECRET": "<your_c6_client_secret>",
        "C6_CERT_PATH": "<your_c6_cert_path>",
        "C6_KEY_PATH": "<your_c6_key_path>"
      }
    }
  }
}

After restart, your agent can call any of the 14 tools below — try get_oauth_token first.

Environment variables · 5

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

C6_CLIENT_ID
required

C6 OAuth client_id issued via the Developer Portal after contract onboarding.

C6_CLIENT_SECRET
requiredsecret

C6 OAuth client_secret.

C6_CERT_PATH
required

Absolute path to the mTLS client certificate (.crt or .pem). BACEN mandates mTLS for Pix v2.

C6_KEY_PATH
requiredsecret

Absolute path to the mTLS private key (.key or .pem).

C6_ENV
optional

Environment: 'sandbox' or 'production'. Defaults to 'sandbox'.

Available tools · 14

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

READget_oauth_token
Mint or return a cached OAuth2 client_credentials bearer token for the C6 Developer Portal. Exposed so agents can inspect token freshness; normal tool calls obtain tokens implicitly.
WRITEcreate_pix_cob
Create a Pix immediate charge (cob) with QR code. Returns the txid, copy-paste EMV payload, and location URL per BACEN Pix v2.
READget_pix_cob
Retrieve a Pix immediate charge (cob) by its txid.
READlist_pix_cob
List Pix immediate charges (cob) registered by the merchant within a date range. Paginated per BACEN Pix v2.
WRITEcreate_pix_cobv
Create a Pix charge with due date (cobv) — used for boleto-like Pix where the payer can pay at or after a due date with optional fine/interest. Returns txid, copy-paste EMV payload, and location URL.
READget_pix_cobv
Retrieve a Pix due-date charge (cobv) by its txid.
READresolve_dict_key
Resolve a DICT key (CPF, CNPJ, email, phone, EVP) to the owner's account data before sending a Pix. Subject to BCB rate limits per consenting payer.
WRITEregister_pix_key
Register a DICT key (CPF, CNPJ, email, phone, or EVP) on a C6 account owned by the merchant. Subject to BCB validation flows (e.g. email/SMS confirmation for email/phone keys).

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

Run `npx -y @codespar/mcp-c6` and add the config block above to your MCP client — Claude, Cursor, VS Code, or any MCP-compatible client. No build step, no SDK required. Prefer hosted? CodeSpar's managed tier runs it for you with auth handled.
C6 Bank — MCP server · 14 tools | CodeSpar