What's new?
Weel's OpenAPI now supports read-write actions. You can push data into Weel programmatically, from any system: your chart of accounts, custom fields, users, and budgets.
Native integrations cover the common accounting systems and ERPs. The read-write API covers everything bespoke, so if you run a system Weel doesn't natively integrate, you can now build the integration you need.
Write access is rolling out in beta to customers on our Enterprise plan from June 2026.
Why it matters
- Build the integration you need: For systems Weel doesn't natively integrate, the read-write API is your path to integration.
- No more manual data entry: Sync GL codes, categories, and custom field values straight from your source system instead of re-keying them.
- Provisioning that matches your HR workflows: Invite, update, and deactivate users in line with your HRIS, so access is ready on day one and closed the moment someone leaves.
- Spend controls driven by your own systems: Set and adjust budgets programmatically, triggered by events in the tools you already run.
Key features
Four new endpoint groups on the existing API, each with full create, update, and delete operations:
- User provisioning: Invite a user, update their role, payment types, and delegation settings, and deactivate them as people join, move, and leave your business.
- Budgets: Create, update, and delete budgets through the API, so your spend limits respond to events elsewhere in your stack.
- Chart of accounts: Push and maintain GL codes, categories, and the mapping between them, so your coding structure in Weel matches your business.
- Custom fields: Manage custom fields and their values through the API, with no cap on the number of values. Define a structure like project code or cost centre and keep thousands of values current without re-entering them by hand.
How to get started
- Read the API documentation: Available at https://developer.letsweel.com
- Set up API access: Generate and manage your API credentials in your Weel account settings, and store your keys securely.
- Call the write endpoints: Use POST to create, PATCH to update, and DELETE to remove.
- Wire it to your source system: Schedule or event-trigger the calls from your ERP or HRIS, so your data in Weel stays current automatically.
