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Connect Brex to ChatGPT, Claude and Gemini

Set it up once and it works in ChatGPT, Claude, Cursor, and any other client you love. It all runs safely in the background, so you can relax and focus on what really matters. Run your company's spend engine through your AI agent.

Ask AI about this Connector

Developed, maintained, and hosted by Vinkius.

MCP VERIFIED · PRODUCTION READY · VINKIUS GUARANTEED

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Works with modern AI clients that support MCP, including ChatGPT, Claude, Cursor, and more.

ChatGPTClaudeCursorPerplexityGeminiMicrosoft CopilotRaycastMeta AI

Your AI does the work. We keep it safe and sound.

No other AI tool gives you this. Your workflow runs in the client you already love, your account stays protected, and you decide what the agent can and cannot do. It is the whole reason to make the switch.

Each Connector lives inside our infrastructure, the same place where your workflow runs. The three things below are already part of it, working quietly in the background so you never have to think about them. Nothing to add, nothing to set up, nothing to worry about.

A futuristic MCP client docking bay
V8 Isolate01

Each Connector runs inside its own sealed environment.

Each Connector runs inside its own sealed V8 runtime — no access to your files, your system, or other servers. A Connector never sees past its own request.

Kill Switch02

One switch stops every agent. Instantly.

One action deactivates every Connector, revokes every token, and ends every session at once. AI Governance keeps the record.

FinOps per User03

Spending limits that pause instead of surprise.

Every user keeps their own connections and credentials, isolated from everyone else. Anything that would cross your spending limit is held for your approval, not billed.

Three controls, built into the layer your AI connects through.

Curated set · 10 capabilities

We ship only the actions that matter.

Capability set01 / 03

01-04

4 capabilities in this set.

Part of 10 available through Brex.

  1. 01

    Brex create card

    Issues a new dynamic virtual corporate card. Use this to provide employees with isolated spending limits for specific SaaS capabilities.

  2. 02

    Brex get balance

    Retrieves the current cash balance for your Brex Cash accounts. Use this to check your available liquidity instantly.

  3. 03

    Brex list cards

    Returns a list of all corporate cards currently issued across your company.

  4. 04

    Brex list vendors

    Fetches the list of all saved vendors within your Brex Accounts Payable module.

Capability set02 / 03

05-07

3 capabilities in this set.

Part of 10 available through Brex.

  1. 05

    Brex pay vendor

    Orchestrates a payment to a specific vendor. This capability handles the money transfer through your existing routing protocols.

  2. 06

    Brex list users

    Provides a full list of all users registered in your Brex company account.

  3. 07

    Brex create user

    Invites a new employee to the Brex platform. You'll need to provide their email, first name, and last name.

Capability set03 / 03

08-10

3 capabilities in this set.

Part of 10 available through Brex.

  1. 08

    Brex create vendor

    Adds a new entity to your Accounts Payable system so you can begin paying them.

  2. 09

    Brex list budgets

    Lists the various budget programs currently assigned to different teams in your organization.

  3. 10

    Brex list transactions

    Sweeps through historical card and account transaction data. This is useful for auditing specific spending patterns.

Real work

What teams actually run

01

Rapid Onboarding

When a new hire starts, your agent can invite them to Brex and issue their first virtual card immediately.

02

SaaS Subscription Management

Issue isolated virtual cards for specific software capabilities to keep company spending organized.

03

Accounts Payable Automation

Add new vendors to your system and send payments using simple text instructions.

04

Expense Auditing

Ask your agent to find all charges from a specific vendor over a certain time period.

Automate a task

Put Brex to work on one thing.

Step-by-step automations your AI runs through this Connector: the workflow, the prompts to start with, and the exact capabilities behind each move.

One connector, every AI

Brex works with the most popular AI clients.

These are the most popular clients, each with a step-by-step guide: one link, set up once, with governance and visibility built in. And because everything runs on the MCP standard, the same connection also works in any other compatible client — nothing to rebuild.

ClaudeClaudeChatGPTChatGPTGeminiGeminiPerplexityPerplexityGrokGrokMicrosoft CopilotMicrosoft CopilotCursorCursorVS CodeVS CodeWindsurfWindsurfJetBrainsJetBrainsClineClineLangChainLangChainVercel AI SDKVercel AI SDKLovableLovableZ.aiZ.aiRaycastRaycastQwen CodeQwen CodeKimi CodeKimi CodeLe ChatLe Chat

Building your own app? The connector is yours to use.

You don't need a client to put Brex to work: the same hosted connection plugs into your own applications and agent code, with the same governance on every request. Build with it, chat with it — one connection for both.

Observed, not estimated

922ms average. Fast in production.

Brex is checked daily against the live service.

Daily averagePeak 1195ms
Oct 3Today
Fastest day
769ms
Slowest day
1195ms
14-day trend
Slowing+20%

Connect your client

One URL. Every client.

Activate the Connector, copy your link, and paste it into the client you already use. 10 capabilities arrive ready to run.

Preview access · not provider authentication

The vk_preview_* token belongs to Vinkius preview infrastructure. It lets Claude discover and display the capabilities of Brex, so you can see the experience inside your AI.

It does not authenticate your account with Brex. Actions requiring credentials or live account data may not run until you activate the Connector and authorize the service.

Brex Connector

You're all set. Choose your MCP client and follow the setup instructions.

Connector linkhttps://edge.vinkius.com/vk_preview_UXa2sU0JvoscQWRF41Zv6b0C2qlmTQmZVMAci9J1/mcp

Claude Desktop

Follow the steps below to connect in seconds.

  1. 1In Claude Desktop, open Settings → Connectors.
  2. 2Click “Add custom connector” and paste the connector link above as the remote MCP server URL.
  3. 3Click Add and start a new chat — Brex capabilities are ready to use.
Configuration · claude_desktop_config.jsonCopy
{
  "mcpServers": {
    "brex-mcp": {
      "url": "https://edge.vinkius.com/vk_preview_UXa2sU0JvoscQWRF41Zv6b0C2qlmTQmZVMAci9J1/mcp"
    }
  }
}
  • Claude
  • ChatGPT
  • Cursor
  • VS Code
  • Windsurf
  • Claude Code
  • JetBrains
  • Cline

Step-by-step instructions for each client are in the guide. How to connect

Guided setup for Claude? Set up Brex in Claude and other AIs

See all the AI clients this connector works with ↑

Who it's for

Built for the work Brex owners hand off.

This MCP is built for finance teams and growing startups that want to automate repetitive spend management tasks.

  • 01

    CFOs and FinOps Leads

    Handle routine accounting and cash management via chat instead of manual dashboard navigation.

  • 02

    Operations Managers

    Automate the provisioning of corporate cards for new hires and contractors.

  • 03

    Startup Founders

    Monitor burn rates and manage vendor payments without needing deep accounting expertise.

FAQ

Questions Brex owners ask.

  • 01

    How secure is the connection to my Brex account?

    The MCP uses your existing Brex User Token. This means the AI can only perform actions that you already have permission to do within Brex.

  • 02

    Do I need to manually approve every card I issue?

    The AI performs actions based on your existing managerial permissions. If your Brex role allows you to create cards, the AI can do it for you.

  • 03

    Can I use this with any AI client?

    Yes, this MCP works with any client that supports the Model Context Protocol, such as Claude, Cursor, or Windsurf.

  • 04

    What happens if I want to see the full transaction list?

    You can use the capability to sweep historical transactions, which your agent can then summarize or filter for you.

  • 05

    Can I pay vendors directly through the AI?

    Yes, the MCP includes capabilities to create vendors and orchestrate payments through your Brex account.

  • 06

    Can the agent truly issue a real, functioning corporate card?

    Yes! The brex_create_card logic specifically maps to creating a virtual limit card. By default, it operates completely valid via Visa/Mastercard configurations matching Brex internals. The agent handles setting its name and tying it strictly to the user id.

  • 07

    What acts as the final authentication key for Brex?

    You only need a User Token. Brex explicitly supports personal workflow automation using user_tokens which perfectly mimic your permissions. It typically begins literally with the string user_token_ followed by hashes.

  • 08

    Will vendor payments via AI require external 2FA from my side?

    To enforce safety in the integration, the approval_type parameter when sending vendor money defaults to 'MANUAL'. This means the AI structures all the math, formatting, routing inputs perfectly but leaves the final 'Accept' button queued on your dashboard.

  • 09

    How can I see my user lists across Brex?

    Run a request on brex_list_users. The AI will natively stream the company's organizational tree mapping the emails to Brex UUIDs required for triggering corporate card injections.

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