> For the complete documentation index, see [llms.txt](https://docs.alternativepayments.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.alternativepayments.io/api-reference/checkout-auth.md).

# Checkout Auth

## Generate a token for checkout flow

> Generate a token for checkout flow

```json
{"openapi":"3.1.1","info":{"title":"Alternative Payments","version":"1.2.0"},"servers":[{"url":"http://public-api.alternativepayments.io"}],"security":[{"OAuth2ClientCredentials":["checkout:write"]}],"components":{"securitySchemes":{"OAuth2ClientCredentials":{"type":"oauth2","flows":{"clientCredentials":{"tokenUrl":"/oauth/token","scopes":{"checkout:read":"Read checkout data","checkout:write":"Create checkout tokens","customers:read":"Read customers and payment methods","customers:write":"Create and update customers and payment methods","invoices:read":"Read invoices","invoices:write":"Create and update invoices","payments:read":"Read payments and payment requests","payments:write":"Create payments and payment requests","payouts:read":"Read payouts","refunds:read":"Read refunds","refunds:write":"Create refunds","tags:read":"Read customer tags","tags:write":"Create, update and delete customer tags, and add or remove them on customers","webhooks:read":"Read webhook subscriptions and events","webhooks:write":"Manage webhook subscriptions"}}}}},"schemas":{"GenerateTokenResponse":{"properties":{"expires_at":{"type":"integer"},"token":{"type":"string"}},"type":"object"},"HttpError":{"properties":{"code":{"type":"string"},"message":{"type":"string"},"validation_errors":{"additionalProperties":{"type":"string"},"type":"object"}},"type":"object"},"GenerateTokenInput":{"properties":{"customer_id":{"type":"string"},"invoice_id":{"type":"string"}},"required":["customer_id","invoice_id"],"type":"object"}}},"paths":{"/checkout-auth/init":{"post":{"description":"Generate a token for checkout flow","operationId":"initCheckoutAuth","responses":{"201":{"description":"Created","content":{"application/json":{"schema":{"$ref":"#/components/schemas/GenerateTokenResponse"}}}},"400":{"description":"Bad Request","content":{"application/json":{"schema":{"$ref":"#/components/schemas/HttpError"}}}},"404":{"description":"Not Found","content":{"application/json":{"schema":{"$ref":"#/components/schemas/HttpError"}}}},"500":{"description":"Internal Server Error","content":{"application/json":{"schema":{"$ref":"#/components/schemas/HttpError"}}}}},"summary":"Generate a token for checkout flow","tags":["CheckoutAuth"],"requestBody":{"content":{"application/json":{"schema":{"$ref":"#/components/schemas/GenerateTokenInput"}}},"description":"Customer and invoice the checkout token is scoped to","required":true}}}}}
```


---

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