API Documentation apps

Routebase

Routebase is the single source of truth for your APIs. Design your OpenAPI spec once in a visual editor, and your documentation portal, mock servers, contract tests, and monitoring all derive from it. Change the spec, publish — and Routebase catches what drifted before your consumers do, with field-level diffs against your live API. Work on specs the way you work on code: branch, review, merge, with breaking-change detection. And because every workspace ships a built-in MCP server, your AI agents read and act on the same source of truth, under your team's permissions.