Add Cart Line
POST/api/portal/cart/lines
Add or increase a product line. product_id and quantity are required. Rejected with 422 and a reason (invalid_quantity, below_moq, increment_mismatch, unknown_product) when quantity rules or catalog visibility fail.
This endpoint currently requires session authentication; Personal Access Token scope support is in progress.
Request
Responses
- 201
- 401
- 403
- 422
- 429
Created
Response Headers
Unauthenticated — the bearer token is missing, revoked, expired, or malformed. Never retry automatically; fix the credential. See the Errors guide.
Forbidden — the token lacks a required scope, the endpoint is not available to API tokens, or the user behind the token lacks the permission. A human must adjust the token scopes or user permissions; do not retry.
Unprocessable Entity
Response Headers
Rate limited — platform limit is 1,000 requests/min; individual tokens may carry lower limits. Honor the Retry-After header before retrying. See the Rate Limits guide.