Overview
What's in the API reference and where to start.
The Threadliner API is the same API the dashboard itself calls — everything you can do by hand, you can also do programmatically.
Start here
- Authentication — create an API key and use it
- Code examples — five real, verified requests and responses
- Rate limits
- Error response format
Endpoint reference
The sidebar groups below — Auth, Contacts, Forms, Forms (Public), Newsletter, Newsletter (Public), CRM, Automation, Webhooks, Billing, Admin, Health — are generated directly from the API's own OpenAPI spec, one page per endpoint, grouped the same way the API itself groups routes. Expand any group in the sidebar to browse its endpoints.
Each endpoint page shows the exact request/response schema, straight from the spec — if the API changes, regenerating these pages picks it up automatically.
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