# Mdkit > Convert documents (PDF, Office, HTML) into clean, LLM-ready Markdown and JSON. ## API - [API reference](https://api.mdkit.online/docs): interactive; machine-readable OpenAPI spec at https://api.mdkit.online/openapi.json. - [Pricing](https://api.mdkit.online/pricing): Free plus Essential, Scale plans; monthly credits reset each cycle. - Auth: send an `X-API-Key` header (create keys after signing in). - Anonymous requests work at a lower, IP-based rate limit. - [Health](https://api.mdkit.online/health): liveness probe. ## MCP - The Model Context Protocol surface is served at `https://api.mdkit.online/mcp` (streamable HTTP, JSON). - `tools/list` is open for discovery; tool calls use the same key + credit tier as REST. ## About - [About](https://api.mdkit.online/about) - [Privacy](https://api.mdkit.online/privacy) - [Terms](https://api.mdkit.online/terms) - [Impressum](https://api.mdkit.online/imprint)