4G Clinical API
Production API host operated by 4G Clinical on AWS API Gateway at api.4gclinical.com. Anonymous requests to every probed path return HTTP 403 ForbiddenException, so no route, contract or discovery document is reachable without sponsor credentials. 4G Clinical describes the surface in marketing terms as "API-enabled access for sponsor systems, dashboards, and reporting environments" (4G DataHub) plus Enterprise Prancer Integrations, and its own vulnerability disclosure policy puts "public-facing systems and APIs" in scope. No OpenAPI, GraphQL, AsyncAPI, WSDL or MCP manifest is published; see x-coverage.