Themis: API testing, API monitoring and API contract validation
Themis is a free, self-hostable API workspace. Send and test API requests with environments and variables, group them into collections, monitor endpoints on a
schedule, and validate every response against OpenAPI or JSON Schema contracts. When something breaks, Themis explains what failed and how to fix it.
Features
- API testing workspace: params, headers, auth, JSON, form and file bodies, with a pass or fail verdict for every response
- Collections with request chaining; import from curl, Postman collections and OpenAPI files
- API monitoring: schedules, incidents, Slack and Discord alerts, maintenance windows and public status pages
- API contract validation with OpenAPI 3 and JSON Schema, version history and breaking change detection
- AI summaries of failures, and a CLI for CI pipelines
Create a free account · Source on GitHub