API reference

OpenAPI 3.1 specification for Robertium's static data endpoints

Every endpoint below resolves to a JSON file served from robertium.com/data/*. No signup, no authentication, no rate limits. The raw spec is at /openapi.yaml — import it into Postman, Insomnia, Swagger Editor, or any OpenAPI-aware client. For a higher-level walkthrough and bulk-export options, see Research access.