CourierDB

CourierDB is a JSON-first database with a simple HTTP API, Python SDK, and MCP interface.

Core Features

• JSON document storage (NoSQL-style)
• Fast LMDB-backed persistence
• API key protection (optional)
• Docker-ready server
• MCP tools for agent workflows
• Python SDK for typed CRUD access

Breaking Change

Vector and semantic features were removed.

• Removed USearch integration
• Removed embeddings/vectorization logic
• Removed /v1/{collection}/search API
• Removed SDK search(...)
• Removed MCP courierdb_search

Getting Started

GitHub

https://github.com/RecursionAI/CourierDB

Docs

• Install and Setup
• Python SDK
• n8n Guide
• API Schemas
• MCP Setup