For the complete documentation index, see llms.txt.

POST /v1/billing/checkout

Create Billing Checkout Session

Creates a Stripe Checkout Session for upgrading to a paid developer plan. Redirects the user to Stripe-hosted checkout on success.

Auth required: Yes

Request Body

• plan: string (required) — The developer plan to subscribe to

Responses

• 200: Checkout session URL
• 400: Validation error
• 401: Authentication required or invalid
• 404: Resource not found

Authentication

Requires authentication. Pass a Bearer token (Supabase JWT) or an API key (`Authorization: Bearer vennio_sk_live_*`) in the request headers.

Base URL: https://api.vennio.app