Xero Accounting API

How to authenticate

1. 1Create a free developer account at developer.xero.com and add an app.
2. 2Configure the OAuth 2.0 redirect URI and copy client id/secret.
3. 3Run the authorization code flow requesting scopes like accounting.transactions offline_access.
4. 4Exchange the code for access + refresh tokens; access tokens last 30 minutes.
5. 5Call the API with Authorization: Bearer and the xero-tenant-id header from the connections endpoint.

Example request

curl -H 'Authorization: Bearer ACCESS_TOKEN' -H 'xero-tenant-id: TENANT_ID' -H 'Accept: application/json' 'https://api.xero.com/api.xro/2.0/Invoices?page=1'

Example response

{"Invoices":[{"InvoiceID":"...","Type":"ACCREC","Contact":{"Name":"ABC Pte Ltd"},"AmountDue":214.00,"Status":"AUTHORISED"}]}