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.

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.

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.

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.

Brex MCP Server for AutoGen 10 tools — connect in under 2 minutes

Name: Brex
Availability: InStock
Author: Vinkius

microsoft.github.io/autogen/docs/tools/mcp-tools

Built by Vinkius GDPR 10 Tools Framework

Microsoft AutoGen enables multi-agent conversations where agents negotiate, delegate, and execute tasks collaboratively. Add Brex as an MCP tool provider through Vinkius and every agent in the group can access live data and take action.

Get MCP Server for AI Agents

ASK AI ABOUT THIS MCP SERVER

Open in ChatGPT Open in Claude Open in Perplexity

Vinkius supports streamable HTTP and SSE.

python

import asyncio
from autogen_agentchat.agents import AssistantAgent
from autogen_ext.tools.mcp import McpWorkbench

async def main():
    # Your Vinkius token. get it at cloud.vinkius.com
    async with McpWorkbench(
        server_params={"url": "https://edge.vinkius.com/[YOUR_TOKEN_HERE]/mcp"},
        transport="streamable_http",
    ) as workbench:
        tools = await workbench.list_tools()
        agent = AssistantAgent(
            name="brex_agent",
            tools=tools,
            system_message=(
                "You help users with Brex. "
                "10 tools available."
            ),
        )
        print(f"Agent ready with {len(tools)} tools")

asyncio.run(main())

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* Every MCP server runs on Vinkius-managed infrastructure inside AWS - a purpose-built runtime with per-request V8 isolates, Ed25519 signed audit chains, and sub-40ms cold starts optimized for native MCP execution. See our infrastructure

About Brex MCP Server

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.

AutoGen enables multi-agent conversations where agents negotiate, delegate, and collaboratively use Brex tools. Connect 10 tools through Vinkius and assign role-based access. a data analyst queries while a reviewer validates, with optional human-in-the-loop approval for sensitive operations.

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.

The Brex MCP Server exposes 10 tools through the Vinkius. Connect it to AutoGen in under two minutes — no API keys to rotate, no infrastructure to provision, no vendor lock-in. Your configuration, your data, your control.

How to Connect Brex to AutoGen via MCP

Follow these steps to integrate the Brex MCP Server with AutoGen.

Install AutoGen

Run pip install "autogen-ext[mcp]"

Replace the token

Replace [YOUR_TOKEN_HERE] with your Vinkius token

Integrate into workflow

Use the agent in your AutoGen multi-agent orchestration

Explore tools

The workbench discovers 10 tools from Brex automatically

Why Use AutoGen with the Brex MCP Server

AutoGen provides unique advantages when paired with Brex through the Model Context Protocol.

Multi-agent conversations: multiple AutoGen agents discuss, delegate, and collaboratively use Brex tools to solve complex tasks

Role-based architecture lets you assign Brex tool access to specific agents. a data analyst queries while a reviewer validates

Human-in-the-loop support: agents can pause for human approval before executing sensitive Brex tool calls

Code execution sandbox: AutoGen agents can write and run code that processes Brex tool responses in an isolated environment

Brex + AutoGen Use Cases

Practical scenarios where AutoGen combined with the Brex MCP Server delivers measurable value.

Collaborative analysis: one agent queries Brex while another validates results and a third generates the final report

Automated review pipelines: a researcher agent fetches data from Brex, a critic agent evaluates quality, and a writer produces the output

Interactive planning: agents negotiate task allocation using Brex data to make informed decisions about resource distribution

Code generation with live data: an AutoGen coder agent writes scripts that process Brex responses in a sandboxed execution environment

Brex MCP Tools for AutoGen (10)

These 10 tools become available when you connect Brex to AutoGen via MCP:

brex_create_card

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

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_get_balance

Get main cash balance of the Brex Cash accounts

brex_list_budgets

List budget programs assigned to teams

brex_list_cards

List all issued cards across the company

brex_list_transactions

Sweep historical Brex card and account transactions

brex_list_users

List all users in the Brex company account

brex_list_vendors

List saved Vendors inside Brex AP

brex_pay_vendor

Orchestrate a vendor payment (Send Money)

Example Prompts for Brex in AutoGen

Ready-to-use prompts you can give your AutoGen agent to start working with Brex immediately.

"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."

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

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

Troubleshooting Brex MCP Server with AutoGen

Common issues when connecting Brex to AutoGen through the Vinkius, and how to resolve them.

McpWorkbench not found

Install: pip install "autogen-ext[mcp]"

Brex + AutoGen FAQ

Common questions about integrating Brex MCP Server with AutoGen.

How does AutoGen connect to MCP servers?

Create an MCP tool adapter and assign it to one or more agents in the group chat. AutoGen agents can then call Brex tools during their conversation turns.

Can different agents have different MCP tool access?

Yes. AutoGen's role-based architecture lets you assign specific MCP tools to specific agents, so a querying agent has different capabilities than a reviewing agent.