MCP For Claude Marketplace
Brex

Brex MCP Connector for Claude

A+

Equip your AI to navigate your Brex suite. Spin up virtual cards, route new team members, and check daily cash allocations through natural chat.

10 tools Official Updated Oct 1, 2026 Official Vinkius Partner
More Details Connect to Claude

The Brex MCP Server bridges standard large language models directly via the platform.brexapis.com to your startup's core spend engine. By delivering a single static User Token, you enable the most flexible financial assistant available.

What you can do

  • Agile Employee Onboarding — brex_create_user directly provisions employees with their associated hierarchical structure. Follow it up with brex_create_card to hand them digital spend capacity securely limited.
  • Accounting Snapshots — You don't need to load the Brex dash to trace down runaway expenses. Trigger brex_list_transactions to pull highly contextualized raw CSV data into your AI workspace.
  • Accounts Payable Controls — Draft and approve external entity vendors via brex_create_vendor and initiate routing payments brex_pay_vendor seamlessly, letting internal routing protocols map out the wires.

How it works

  1. In your Brex settings, you can generate an immediate User Token (typically starting with user_token_).
  2. This token natively identifies you and limits AI actions safely within your existing managerial permissions level.
  3. Drop this into your client credentials and authorize AI access.

Who is this for?

  • Forward-Thinking CFOs / FinOps — Handle your routine accounting actions strictly through language.
  • Startups Scaling — Automatically loop AI agents to handle corporate card provisioning to cloud instances without manual checks.
corporate-cardsspend-managementemployee-onboardingfinancial-operationscash-managementvirtual-cards

10 tools expose this connector's capabilities to your AI agent.

brex_create_card

Useful for giving employees isolated cards for SaaS subscriptions. Issue a dynamic Virtual Corporate Card

brex_get_balance

Get main cash balance of the Brex Cash accounts

brex_list_cards

List all issued cards across the company

brex_list_vendors

List saved Vendors inside Brex AP

brex_pay_vendor

Orchestrate a vendor payment (Send Money)

brex_list_users

List all users in the Brex company account

brex_create_user

You must provide a valid email, first name, and last name. Invite a new employee / user to Brex

brex_create_vendor

Create a Vendor in AP (Accounts Payable)

brex_list_budgets

List budget programs assigned to teams

brex_list_transactions

Sweep historical Brex card and account transactions

See how to talk to your AI agent using Brex.

Invite the new engineer 'John Carter' via email john@company.com into Brex. After you get his ID, spin him up a Virtual Card with a $1K limit immediately.

Double-tool chain complete! First, I invoked `brex_create_user` and instantiated John natively. Next, I utilized the Brex User UUID `usx_210` to successfully map and authorize a fresh Virtual Mastercard strictly capped at a 1000 limit.

Check the core cash settlement. How much Treasury base balance do we stand at? Extract only active Checking values.

According to the `cash/balances` API sweep, your primary operational checking environment sits at $145,210.00 USD securely settled by your local Brex vault integrations.

Pull all corporate expenses tracked over the past 30 days focusing entirely on our AWS hosting and digital footprints.

I performed a granular array analysis of over 50 transaction payloads returning from the last 30 intervals. Brex logs exactly three occurrences of AWS charges on the 'Engineering Budget'. Amounting to roughly $3,000 cumulatively.

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.

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