--- title: "Connect Brex to Hypamoon" description: "Brex has an open API. See what you can build with it in Hypamoon, how it signs in, and the sources we checked." url: https://hypamoon.com/connect-to/brex --- 1. [Connect to](https://hypamoon.com/connect-to) 2. Brex ERP and accounting # Connect Brex to Hypamoon Yes. Brex has a public, versioned API and you create the key yourself, so your chat can write the adapter. Open ## The check Three questions about the API of Brex, answered from its own docs. **Public API docs**\ **Yes.** [Read the docs](https://developer.brex.com/guides/authentication) **A key you create yourself**\ **Yes.** Account or card admins create user tokens with scopes under Developer, Settings, after the company accepts the developer API agreement. [developer.brex.com](https://developer.brex.com/guides/authentication) **Versions or a changelog**\ **Yes.** Versioned endpoints, a versioning policy and a public changelog. [developer.brex.com](https://developer.brex.com/changelog) **How it signs in**\ User token sent as a Bearer token; OAuth for partner apps. **Webhooks**\ **Yes.** It can tell your app when something changes. [developer.brex.com](https://developer.brex.com/guides/webhooks) **Hosting**\ Cloud ## What you can build Pull card expenses and receipts into your books, and look up budgets or card limits from your chat. Your chat writes it as a Hypamoon adapter from the docs above. Reading starts after you click Allow in the portal, and every write waits for your approval, one call at a time. [How adapters work](https://hypamoon.com/docs/adapters) ### Good to know - Your adapter uses a fixed key: you paste it once in the Hypamoon portal, never in the chat, and it only goes to the API host you allow. - A user token expires after 90 days without calls and stops when its user is deactivated. Limits are 1,000 requests per minute per client and account, plus daily caps on transfers and new cards. ## Try it in your chat Fill in what to read and write, and send it. Say this in your chat > Build the Hypamoon recipe build-an-adapter for Brex. API docs: https://developer.brex.com/guides/authentication. Read: \[what\]. Write: \[what, or nothing\]. [Open in Claude](https://claude.ai/new?q=Build%20the%20Hypamoon%20recipe%20build-an-adapter%20for%20Brex.%20API%20docs%3A%20https%3A%2F%2Fdeveloper.brex.com%2Fguides%2Fauthentication.%20Read%3A%20%5Bwhat%5D.%20Write%3A%20%5Bwhat%2C%20or%20nothing%5D.) In Claude, or another chat with the full Hypamoon connection; adapters are not in ChatGPT yet. You paste the key in the portal, never in the chat. [The full recipe](https://hypamoon.com/r/build-an-adapter) ## Sources Checked on 1 November 2026. - [developer.brex.com/guides/authentication](https://developer.brex.com/guides/authentication) - [developer.brex.com/changelog](https://developer.brex.com/changelog) - [developer.brex.com/guides/webhooks](https://developer.brex.com/guides/webhooks) Brex is a name of its owner, used here only to describe the software. This page is not an official integration and Hypamoon has no partnership with Brex. Found something that changed? Tell us at [support](https://hypamoon.com/support#contact). ## More in erp and accounting - [**Acumatica** Open](https://hypamoon.com/connect-to/acumatica) - [**AFAS Profit** Open](https://hypamoon.com/connect-to/afas-profit) - [**DATEV** Possible](https://hypamoon.com/connect-to/datev) - [**e-Boekhouden.nl** Open](https://hypamoon.com/connect-to/e-boekhouden) - [**Exact for Accountancy** Open](https://hypamoon.com/connect-to/exact-for-accountancy) - [**Exact Globe+** Possible](https://hypamoon.com/connect-to/exact-globe) - [**Exact Gripp** Possible](https://hypamoon.com/connect-to/exact-gripp) - [**Exact Multivers** Possible](https://hypamoon.com/connect-to/unit4-multivers) - [**Exact Online** Open](https://hypamoon.com/connect-to/exact-online) - [**FreshBooks** Open](https://hypamoon.com/connect-to/freshbooks) - [**Holded** Open](https://hypamoon.com/connect-to/holded) - [**Isah** Unknown](https://hypamoon.com/connect-to/isah) - [**Jortt** Open](https://hypamoon.com/connect-to/jortt) - [**KING Finance** Possible](https://hypamoon.com/connect-to/king-finance) - [**Lexware Office (lexoffice)** Open](https://hypamoon.com/connect-to/lexoffice) - [**Microsoft Dynamics 365 Business Central** Open](https://hypamoon.com/connect-to/dynamics-365-business-central) - [**Microsoft Dynamics 365 Finance and Operations** Open](https://hypamoon.com/connect-to/dynamics-365-finance-operations) - [**Microsoft Dynamics NAV** Open](https://hypamoon.com/connect-to/dynamics-nav) - [**Moneybird** Open](https://hypamoon.com/connect-to/moneybird) - [**Odoo** Open](https://hypamoon.com/connect-to/odoo) - [**Oracle NetSuite** Open](https://hypamoon.com/connect-to/oracle-netsuite) - [**Pennylane** Open](https://hypamoon.com/connect-to/pennylane) - [**QuickBooks Online** Open](https://hypamoon.com/connect-to/quickbooks-online) - [**Ridder iQ** Unknown](https://hypamoon.com/connect-to/ridder-iq) - [**Sage Accounting (Sage Business Cloud)** Unknown](https://hypamoon.com/connect-to/sage-accounting) - [**Sage Intacct** Possible](https://hypamoon.com/connect-to/sage-intacct) - [**SAP Business One** Open](https://hypamoon.com/connect-to/sap-business-one) - [**SAP S/4HANA** Open](https://hypamoon.com/connect-to/sap-s4hana) - [**sevDesk** Open](https://hypamoon.com/connect-to/sevdesk) - [**Simplicate** Open](https://hypamoon.com/connect-to/simplicate) - [**SnelStart** Possible](https://hypamoon.com/connect-to/snelstart) - [**Syntess Atrium** Closed](https://hypamoon.com/connect-to/syntess-atrium) - [**Twinfield** Possible](https://hypamoon.com/connect-to/twinfield) - [**Unit4 ERPx** Possible](https://hypamoon.com/connect-to/unit4-erpx) - [**Visma eAccounting** Possible](https://hypamoon.com/connect-to/visma-eaccounting) - [**Visma.net ERP** Possible](https://hypamoon.com/connect-to/visma-net-erp) - [**Wave** Possible](https://hypamoon.com/connect-to/wave) - [**Xero** Open](https://hypamoon.com/connect-to/xero) - [**Yuki (Nmbrs Accounting)** Unknown](https://hypamoon.com/connect-to/yuki) - [**Zoho Books** Open](https://hypamoon.com/connect-to/zoho-books) - [**BILL (Bill.com)** Open](https://hypamoon.com/connect-to/bill) - [**Expensify** Possible](https://hypamoon.com/connect-to/expensify) - [**Pleo** Possible](https://hypamoon.com/connect-to/pleo) - [**Ramp** Open](https://hypamoon.com/connect-to/ramp) [All 267 tools](https://hypamoon.com/connect-to) ## Tool not listed? Ask the chat to check its API. The same three checks work for any software. Your chat reads the vendor's own docs and tells you what it found. Say this in your chat > Check if \[software\] has an open API that a Hypamoon adapter can use: public API docs, a key or token I can create myself without asking the vendor, and versions or a changelog. Link the pages you used. [Open in Claude](https://claude.ai/new?q=Check%20if%20%5Bsoftware%5D%20has%20an%20open%20API%20that%20a%20Hypamoon%20adapter%20can%20use%3A%20public%20API%20docs%2C%20a%20key%20or%20token%20I%20can%20create%20myself%20without%20asking%20the%20vendor%2C%20and%20versions%20or%20a%20changelog.%20Link%20the%20pages%20you%20used.) [Open in ChatGPT](https://chatgpt.com/?q=Check%20if%20%5Bsoftware%5D%20has%20an%20open%20API%20that%20a%20Hypamoon%20adapter%20can%20use%3A%20public%20API%20docs%2C%20a%20key%20or%20token%20I%20can%20create%20myself%20without%20asking%20the%20vendor%2C%20and%20versions%20or%20a%20changelog.%20Link%20the%20pages%20you%20used.) Fill in the name of your software. Checking needs no connection to Hypamoon. ## Ready to connect Brex? Connect your chat once, then ask it to build the adapter. [Start free](https://app.hypamoon.com/?mode=signup&utm_source=connect-to&utm_campaign=brex) Works in Claude and ChatGPT. [Add to Claude](https://hypamoon.com/connect?via=connect-to~brex#claude) [Add to ChatGPT](https://hypamoon.com/connect?via=connect-to~brex#chatgpt)