API Reference
Complete documentation for the OpenDelphi REST API. Build powerful integrations with predictable, resource-oriented endpoints and consistent JSON responses.
Authentication
All API requests require a Bearer token passed in the Authorization header. Generate API keys from your dashboard under Settings. Keys can be scoped to specific projects and revoked at any time.
Surveys API
Create, update, list, and delete surveys programmatically. The Surveys API supports full CRUD operations, branching logic configuration, and template management. Responses are paginated by default with configurable page sizes.
Responses API
Retrieve individual or aggregated survey responses with flexible filtering and sorting options. Export data in JSON or CSV format, and use real-time streaming for live dashboards. Supports partial responses and session resumption.
Webhooks
Subscribe to real-time events such as response submissions, survey completions, and quota thresholds. Webhooks are delivered with HMAC signatures for verification and include automatic retries with exponential backoff.
Ready to get started?
Join thousands of researchers, teams, and organizations using OpenDelphi.
Get Started Free