REST & GraphQL API, TypeScript SDK, webhooks, and full open-source access. Everything a developer needs to extend, integrate, or automate Billin.
API keys and OAuth 2.0. Scoped tokens per integration. Rotate without downtime.
Every UI action is an endpoint. Full OpenAPI 3.1 spec. Auto-generated client SDKs.
Flexible queries, real-time subscriptions, persisted queries. Ships alongside REST.
Subscribe to any record change. Signed payloads, retry logic, delivery log.
Typed, tree-shakeable. Works in browser and Node. npm install @billin/sdk
Add fields, forms, and reports without forking. First-class citizen in the data model.
Join 4,200+ developers building on Billin. GitHub discussions, Discord, and weekly office hours.