MCP C6

Name: MCP C6
Author: codespar

by codesparversion 0.1.0-alpha.4i★ –iRuns on your computer

Registry nameio.github.codespar/mcp-c6

Install

Overview

Description from the maker (original English)

DEPRECATED: no live endpoint (baas.c6bank.com.br does not resolve)

PopNx MCP’s three pillars

These three are never merged into one score: opinions, measurements and popularity are different things.

User voiceiNo reviews yetReviews open together with accounts in a later step
Our basic checksi1 of 1 passedChecked from public information; code not scanned yet
UsageiNot measured yet★ –

What you can do with it

We have not written a plain-language summary for this one yet. Below are the facts we read from the registry.

Connection: Runs on your computer
Transport: stdio
Category: Other
You need to fill in: C6_CLIENT_ID, C6_CLIENT_SECRET, C6_CERT_PATH, C6_KEY_PATH

Install

Pick the AI app you use, then copy the settings.

Before you install

Basic checks: 1 of 1 passed
Runs on your computer with your user’s permissions (files, network, apps).
You fill in yourself: C6_CLIENT_ID, C6_CLIENT_SECRET, C6_CERT_PATH, C6_KEY_PATH, C6_ENV

Values marked secret are keys to your account. Never share them or paste them into a chat.

You need

npmNode.js installed (for the npx command)

Which app do you use?

ClaudeClaude CodeCursorVS CodeChatGPT

Pick your app above. We remember it, so next time the button says “Install in …”.

Open Claude Desktop → Settings → Developer → Edit Config, and paste this into claude_desktop_config.json

{
  "mcpServers": {
    "c6": {
      "command": "npx",
      "args": [
        "-y",
        "@codespar/mcp-c6"
      ],
      "env": {
        "C6_CLIENT_ID": "your-value",
        "C6_CLIENT_SECRET": "your-value",
        "C6_CERT_PATH": "your-value",
        "C6_KEY_PATH": "your-value",
        "C6_ENV": "your-value"
      }
    }
  }
}

Run this in your terminal

claude mcp add c6 --env C6_CLIENT_ID=your-value --env C6_CLIENT_SECRET=your-value --env C6_CERT_PATH=your-value --env C6_KEY_PATH=your-value --env C6_ENV=your-value -- npx -y @codespar/mcp-c6

Fill in the empty values before running it.

Open in Cursor

Or copy the settings yourself

Paste into .cursor/mcp.json in your project, or ~/.cursor/mcp.json

{
  "mcpServers": {
    "c6": {
      "command": "npx",
      "args": [
        "-y",
        "@codespar/mcp-c6"
      ],
      "env": {
        "C6_CLIENT_ID": "your-value",
        "C6_CLIENT_SECRET": "your-value",
        "C6_CERT_PATH": "your-value",
        "C6_KEY_PATH": "your-value",
        "C6_ENV": "your-value"
      }
    }
  }
}

Your browser asks to open the app, then the app shows the settings and asks you to confirm. Key values are left empty for you to fill in.

Open in VS Code

Or copy the settings yourself

Paste into .vscode/mcp.json in your project

{
  "servers": {
    "c6": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "@codespar/mcp-c6"
      ],
      "env": {
        "C6_CLIENT_ID": "your-value",
        "C6_CLIENT_SECRET": "your-value",
        "C6_CERT_PATH": "your-value",
        "C6_KEY_PATH": "your-value",
        "C6_ENV": "your-value"
      }
    }
  }
}

Your browser asks to open the app, then the app shows the settings and asks you to confirm. Key values are left empty for you to fill in.

This one runs on your computer, and ChatGPT can only connect to servers on the internet. Pick another app.

Your choice stays on this device in a cookie; no account needed.

Values you fill in

C6_CLIENT_ID required env
C6 OAuth client_id issued via the Developer Portal after contract onboarding.
C6_CLIENT_SECRET secret required env
C6 OAuth client_secret.
C6_CERT_PATH required env
Absolute path to the mTLS client certificate (.crt or .pem). BACEN mandates mTLS for Pix v2.
C6_KEY_PATH secret required env
Absolute path to the mTLS private key (.key or .pem).
C6_ENV env
Environment: 'sandbox' or 'production'. Defaults to 'sandbox'.

These settings are generated from the maker’s registry entry. If the README says otherwise, follow the README.

What it can do

Runs on your computer; the tool list appears in your AI app after you install it.

Basic checksi

We check information anyone can see; we have not read the code. Checks that do not apply are left out of the count. · Checked Nov 6, 2026

✓ Pass
Maker matches the repo
The registry name was verified with the GitHub account codespar, which owns the repo
… Not checked yet
Still maintained
We have not read this repo from GitHub yet
… Not checked yet
Has a licence
We have not read this repo from GitHub yet
– Not applicable
Endpoint responds
This one runs on your computer; there is no internet endpoint
– Not applicable
Sign-in with OAuth
Runs on your computer and uses local settings instead
… Not checked yet
No hidden instructions in tool descriptions
Runs on your computer; we can only read tool lists from internet endpoints

Compared with others in Otheri

More stars than 0% of the other 32531 servers in this category
Published to the registry more recently than 50% of the other 32531 servers in this category
Basic checks equal to or better than 100% of the other 32531 servers in this category

Compared with every active server in this category in the registry. Stars count only when the publisher owns the repo.

Common questions

Is MCP C6 safe?

It passed 1 of 1 applicable basic checks. We have not read the code. Before adding a key or token, see what access the server asks for and use a key with only the permissions you need.

What keys or codes does it need?

You need to fill in: C6_CLIENT_ID, C6_CLIENT_SECRET, C6_CERT_PATH, C6_KEY_PATH

Does it run on my computer or in the cloud?

It runs on your computer. Your AI app starts it when needed, and data does not pass through the maker’s servers (unless it calls an online service itself).

Is it still maintained?

The GitHub repo last changed –, and the latest version (0.1.0-alpha.4) reached the registry 40 days ago.

Which apps can use it?

Apps that support MCP, such as Claude Desktop, Claude Code, Cursor and VS Code. You also need Node.js on your computer.

What can I use instead?

In the same category: Spec Driven Development, Remote Desktop Commander, Reelsaw

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README from the maker

Open the README

Copied from the maker’s repo as written. PopNx MCP has not reviewed or endorsed it. HTML, images and scripts are removed. Links lead off this site.

@codespar/mcp-c6

Deprecated: no live endpoint. Measured on 2026-09-27 against two public DNS resolvers (8.8.8.8 and 1.1.1.1): baas.c6bank.com.br (production) and baas-sandbox.c6bank.com.br (sandbox) do not resolve in DNS. C6's developer portal now documents baas-api.c6bank.info (production) and baas-api-sandbox.c6bank.info (sandbox), both behind mTLS; this server's paths and auth were not written against them and have not been checked. No tool in this server reaches a service. The package is deprecated on npm and stays in this repository for reference only. If you have a working endpoint, point the server at it with C6_BASE_URL. To bring the package back, open an issue in mcp-dev-latam with the provider's documented base URL.

MCP server for C6 Bank — a top Brazilian digital bank, JPMorgan-backed.

C6 ranks among the largest Brazilian digital banks by retail account base and has expanded aggressively into SMB and corporate banking. Merchants integrate directly for Pix, boleto, and account-data flows.

Status: alpha (`0.1.0-alpha.1`)

C6's Developer Portal is contract-gated — full OpenAPI specs for Pix, Cobrança, and account APIs are only visible to onboarded merchants. The endpoint paths in this server are best-guesses based on (a) the BACEN Pix v2 standard, (b) C6's public marketing pages, and (c) conventions shared across Itaú / Santander / Bradesco. Every unverified path is flagged TODO(verify) in the source.

Pin to exact versions during 0.1.x; paths will be corrected to match the portal spec once an onboarded merchant can validate.

Tools (14)

Tool	Purpose
`get_oauth_token`	Mint or return a cached OAuth2 client_credentials bearer token for the C6 Developer Portal.
`create_pix_cob`	Create a Pix immediate charge (cob) with QR code.
`get_pix_cob`	Retrieve a Pix immediate charge (cob) by its txid.
`list_pix_cob`	List Pix immediate charges (cob) registered by the merchant within a date range.
`create_pix_cobv`	Create a Pix charge with due date (cobv) — used for boleto-like Pix where the payer can pay at or after a d...
`get_pix_cobv`	Retrieve a Pix due-date charge (cobv) by its txid.
`resolve_dict_key`	Resolve a DICT key (CPF, CNPJ, email, phone, EVP) to the owner's account data before sending a Pix.
`register_pix_key`	Register a DICT key (CPF, CNPJ, email, phone, or EVP) on a C6 account owned by the merchant.
`delete_pix_key`	Delete a DICT key owned by the merchant.
`create_boleto`	Issue a boleto via C6 Cobrança.
`get_boleto`	Retrieve a boleto by its C6 identifier (id or nosso_numero).
`cancel_boleto`	Cancel (baixa) an outstanding boleto before payment.
`get_account_balance`	Retrieve the current balance snapshot for a merchant account.
`get_statement`	Retrieve account statement transactions for a given period.

Install

npm install @codespar/mcp-c6@0.1.0-alpha.1

Environment

C6_CLIENT_ID="..."        # OAuth client_id from C6's Developer Portal

C6_CLIENT_SECRET="..." # OAuth client_secret C6_CERT_PATH="/abs/path/to/client.crt" # mTLS client certificate C6_KEY_PATH="/abs/path/to/client.key" # mTLS private key C6_ENV="sandbox" # or "production" (default: sandbox)

Authentication

Two factors are both required on every call:

OAuth2 `client_credentials` — the server calls the token endpoint, caches the bearer until ~60s before expiry, and attaches Authorization: Bearer to downstream calls.
mTLS — BACEN mandates mutual TLS for Pix v2, and C6 enforces it across product families. The server loads the client certificate and private key from the paths you set, builds a Node https.Agent, and routes every request through it.

You obtain the cert + key bundle from the C6 Developer Portal after your merchant contract is signed.

Run

# stdio (default)

npx @codespar/mcp-c6

Caveats

Paths are unverified. See the TODO(verify) markers in src/index.ts. Onboarded merchants should validate against their portal-issued OpenAPI spec and open a PR.
Sandbox host is a guess. C6 issues a sandbox subdomain per merchant; override by editing BASE_URL if your provisioned sandbox URL differs.

Enterprise

Need governance, budget limits, and audit trails for agent payments? CodeSpar Enterprise adds policy engine, payment routing, and compliance templates on top of these MCP servers.

License

MIT

MCP C6

Overview

PopNx MCP’s three pillars

What you can do with it

Install

Before you install

Values you fill in

What it can do

Basic checksi

Maker matches the repo

Still maintained

Has a licence

Endpoint responds

Sign-in with OAuth

No hidden instructions in tool descriptions

Compared with others in Otheri

Common questions

Alternatives

Spec Driven Development

Remote Desktop Commander

Reelsaw

README from the maker

@codespar/mcp-c6

Status: alpha (0.1.0-alpha.1)

Tools (14)

Install

Environment

Authentication

Run

Caveats

Enterprise

License

Status: alpha (`0.1.0-alpha.1`)