The platform · app.castomapi.com
Custom endpoints
Your own JavaScript at /c/your-slug — sandboxed in isolated V8, 2 s CPU, 128 MB, a guarded fetch, billed from the same wallet.
Upload a script that defines main(req); it gets a URL. It runs in its own isolate per request with no network except a bridged fetch that refuses private addresses, and it costs tokens like any other call. See the Custom endpoints page for the whole story.
This service publishes no public OpenAPI document; the operations below are from its own documentation. Base URL: https://app.castomapi.com
The platform
Auth
One identity for every product: sign-in, sessions, OAuth clients, projects and the revocation keys every service checks.
Billing & plans
Plan entitlements for every castomo product: Stripe subscriptions in, effective quotas out, pushed to the product that enforces them.
Pay
Payments between people and businesses on the platform, with Stripe underneath.
Book
Bookings and availability: resources, slots, reservations, reminders and refunds by policy.
Events
A free global events API: what is happening where, for dashboards and sites that need a calendar they did not write.
Data
Free global reference data: countries, languages, currencies, logistics, standards — tens of millions of records, no key.