Claude Brex connectorWhat Claude can do in your Brex account.
The Claude Brex connector exposes 10 tools. 7 read your spend data, 0 write to it on the directory sheet, and 3 are documented nowhere. Below: what Claude can look up, what it cannot touch, the admin step first, and where Brex says more than the sheet.
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What changes for an employee with a Brex card
No more logging into the dashboard to answer the same three questions: how much is left on the limit, which receipts are missing, when the reimbursement lands. You ask Claude, it reads your own Brex data and answers in the chat. Card numbers never show up, and what your role hides stays hidden.
Close your expense report faster. list_my_expenses pulls your recent spend, filtered by date, amount or merchant, and flags the lines still missing a receipt. get_expense_policy answers the policy question you were about to email finance about.
Know what you can still spend. list_my_limits gives each limit, its remaining balance and its period; list_my_cards shows the cards you can use and their status, without their numbers.
Stop chasing reimbursements. get_reimbursement_payout_date returns the expected payout date of an approved reimbursement.
What it will not do: the directory sheet lists no tool that changes anything, and Brex points to its dashboard or mobile app to create reimbursements, approve or reject expenses, or edit a team's transactions. Brex's article does describe edits to your own memos and receipts, a gap covered in the limits below. Nothing runs by itself either; for scheduled exports, the Brex Make integration answers another need, and the Integrations hub lists the rest.
The vocabulary in one minute
Five words you will meet while plugging Brex into Claude.
- Connector
- The link you set up once between Claude and an account you already have, so Claude can work in it while it answers you.
- Tool
- One named thing a connector lets Claude do. Claude picks the ones it needs on its own, and the directory sheet lists them by name.
- Authorization
- Brex's own sign-in and permission request, where you hand Claude its access. Granted once per person, revocable the same way.
- Approval
- The confirmation Claude waits for before it goes ahead with a change to an account, shown in the conversation when it matters.
- MCP
- The shared standard connectors are built on: it is what lets an assistant like Claude talk to an outside service such as Brex.
Connect Brex to Claude in three steps
- 01
Find Brex in Claude
Open Claude's settings, go to Customize then Connectors, and look for Brex. On a Team or Enterprise workspace, an Owner or Primary Owner has to switch the connector on before members can sign in to it.
- 02
Start the connection
Click Connect on Brex's row, then sign in with the email tied to your Brex account, through single sign-on if your company uses it. If the link breaks, use Disconnect and connect again.
- 03
Approve the permission request
Read Brex's permission request before you accept: it belongs to Brex, not to Claude, and it sets what the access covers. Access can be revoked later from the Brex dashboard, under Settings, Personal settings, Connected Integrations.
The 10 tools, sorted by what they do
Brex gives Claude 10 tools: 7 that read your account, 0 that change something in it, and 3 no official source describes.
Two groups on the directory sheet: what Claude reads, and what no official source describes. Tool names stay exactly as Claude shows them.
- 7 read
- 3 not documented
What Claude reads (7)
7 toolsSeven tools that look up your spending data without touching it.
get_card_by_id
Retrieves the details of one Brex card, including its limits and status, according to Brex's description of its server. Card numbers are not part of what Claude gets.
get_expense_policy
Gives Claude your company's expense policy, so it can answer policy questions and guide how you word a memo, as the directory sheet describes.
get_reimbursement_payout_date
Looks up the expected payout date of a reimbursement that has already been approved.
list_my_cards
Shows the cards you are allowed to use and whether each one is active, without ever displaying a card number.
list_my_expenses
Pulls your recent expenses, which Claude can filter by date, amount or merchant, and points out those still missing a receipt.
list_my_limits
Reads your spend limits with the amount left on each and the period it covers.
list_users_by_name_or_email
Searches the people in your Brex account by name or email, which Brex frames as useful for admins running audits or onboarding.
Not documented (3)
3 toolsThe directory publishes these three names and nothing more. No official text says what they do, and this page will not guess from a name.
get_user_by_id
This name appears on the directory's tool list, and that is all anyone publishes about it. Brex's article does not describe it and no Claude page does either, so this page goes no further.
get_user_myself
Listed by name on the directory sheet with no official description, neither from Brex nor from Anthropic. Reading a role into the name would be making it up.
list_users
No source explains this one: Brex's help article describes searching users, not this tool, and Claude's documentation has no Brex page. Only its name is public, nothing about what it returns.
What Claude asks before it acts
By default, Claude stops and asks for your go-ahead before any action it takes on an account for you. On this sheet every documented tool only reads, and no source says whether a lookup triggers that prompt.
On a Team or Enterprise workspace, owners decide whether members may let some actions through without being asked each time. They can also cap what a connector may do for the whole organisation, keeping reads and closing writes, and nobody overrides that from their own account. Brex adds its own layer: the connector respects your role-based permissions, so Claude only sees what your Brex user is allowed to see. Card and account admins can ask broader company spend questions.
Which plans this works on
None of the 819 sheets in the official directory shows plan availability. The per-connector answer is published nowhere, and that is a real gap in the catalogue.
The general rule is published: remote connectors are open to all users on Claude, Cowork, Claude Desktop and mobile. On Team and Enterprise, an Owner or Primary Owner switches the connector on for the organisation before each member can sign in. Brex tells its users the same thing. For the current state of this one, check the Brex sheet in the official directory.
Where this connector stops
A connector is not an automation. Claude calls these tools while it answers you: nothing starts when a card is swiped or a receipt goes missing.
Only Brex documents this connector, and flags it as early access; neither Claude's help centre nor Anthropic's developer docs have a page on it. By default, its sheet only exposes reading, which is an observed floor, not a guarantee: an administrator may open actions no public sheet shows. The partner badge is not a security audit, and Anthropic says on every sheet that it does not guarantee how a publisher's tools behave. Your questions and Claude's answers are processed by Anthropic under your organisation's Claude agreement, Brex notes.
Can the Brex connector change anything in Brex from Claude?
- Claude directory sheet ↗September 202610 tools, all named get or list; no tool that edits anything is listed.
- Brex help article, Brex in Claude section ↗September 2026The connector lets you edit memos, receipts, attendees and spend limits on your own transactions, and covers banking, bills, travel and accounting too.
What this page followsThey describe different tool lists. Brex announces edits and whole areas that none of the 10 tools on the sheet carries, and itself says a tools refresh is needed to get the full suite. This page sticks to the sheet and states the gap: after refreshing, the list Claude shows you is the one that counts.
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