What can I automate with Brex in Sim?

You can list expenses, get expense, update expense memo, upload receipt, and match receipt with Brex in Sim, plus 29 more Brex tools listed on this page. Each runs as a tool inside an AI agent, so the agent can combine Brex with any other connected service and apply LLM reasoning between steps.

How do I connect Brex to Sim?

(1) Create a free account at sim.ai. (2) Create an agent in your workspace. (3) Drag a Brex block onto the workflow builder. (4) Paste your Brex API key to authenticate. (5) Pick a tool such as "List Expenses", wire up its inputs, and click Run.

How do I list expenses with Brex in Sim?

Add a Brex block to your agent and select "List Expenses" as the tool. List expenses in the Brex account with optional filters for user, status, payment status, and purchase date range. Fill in the required fields. Inputs can reference outputs from earlier steps, such as text generated by an AI block or data fetched from another integration.

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Brex integration for AI agents

Manage expenses, receipts, transactions, and team data in Brex

View docs

Last updated October 14, 2026

What Sim agents can do with Brex

List and update expenses, upload and match receipts, view card and cash transactions, accounts, budgets, spend limits, vendors, transfers, and team data.

Category: Commerce
Authentication: API key
Tools: 34
Triggers: 0
Documentation: Brex docs

How to automate Brex with Sim

Create a free account
Sign up at sim.ai in seconds. No credit card required. Your workspace is ready immediately.
Add a Brex block
Open your workspace, drag a Brex block onto the workflow builder, and paste in your Brex API key.
Configure, connect, and run
Pick the tool you need, wire in an AI agent for reasoning or data transformation, and run. Your Brex automation is live.

Agent templates

Ready-to-use templates featuring Brex. Click any to build it instantly.

Brex tools

34 Brex tools available to Sim agents.

List Expenses

List expenses in the Brex account with optional filters for user, status, payment status, and purchase date range

Get Expense

Get a single Brex expense by its ID, including merchant, user, and receipt details

Update Expense Memo

Update the memo of a Brex card expense

Upload Receipt

Upload a receipt file and attach it to a specific Brex card expense

Match Receipt

Upload a receipt file and let Brex automatically match it with existing expenses

List Card Transactions

List settled card transactions for all Brex card accounts

List Cash Transactions

List transactions for a Brex cash account

List Card Accounts

List all Brex card accounts with balances and limits

List Cash Accounts

List all Brex cash accounts with balances and account details

Get Cash Account

Get a Brex cash account by ID, or the primary cash account when no ID is provided

List Card Statements

List finalized statements for the primary Brex card account

List Cash Statements

List finalized statements for a Brex cash account

List Users

List users in the Brex account, optionally filtered by email

Get User

Get a Brex user by their ID

Get Current User

Get the Brex user associated with the API token

List Departments

List departments in the Brex account, optionally filtered by name

List Locations

List locations in the Brex account, optionally filtered by name

List Titles

List job titles in the Brex account, optionally filtered by name

List Cards

List cards in the Brex account, optionally filtered by card owner

Get Company

Get the Brex company associated with the API token

List Budgets

List budgets in the Brex account

Get Budget

Get a Brex budget by its ID

Create Budget

Create a new budget in the Brex account

Archive Budget

Archive a Brex budget, making any spend limits beneath it unusable for future expenses and removing it from the UI

List Spend Limits

List spend limits in the Brex account, optionally filtered by member user

Get Spend Limit

Get a Brex spend limit by its ID

Create Spend Limit

Create a new spend limit (hard-authorization card program) in the Brex account

List Vendors

List vendors in the Brex account, optionally filtered by name

Get Vendor

Get a Brex vendor by its ID

Create Vendor

Create a new vendor in the Brex account

Update Vendor

Update an existing vendor in the Brex account

List Transfers

List money transfers in the Brex account

Get Transfer

Get a Brex money transfer by its ID

Create Transfer

Create a money transfer from a Brex cash account to a vendor

Frequently asked questions

Sim's Brex integration adds 34 tools to the AI agents you build in Sim's visual workflow builder. Manage expenses, receipts, transactions, and team data in Brex.