About Welcome to Lunar.dev
Lunar.dev is an open-source platform for managing, governing and optimizing third-party API consumption by applications and AI agents. It acts as a unified API gateway for AI traffic, aimed at teams that need central control over outbound calls.
Key features
- 01Live metrics on latency, errors, cost and tokens
- 02Policy control over agent tool access
- 03Rate limits, retries, priority queues and circuit breakers
- 04Consolidation of multiple MCP servers behind one gateway
Use cases
- 01Monitoring agent API call cost and error rates
- 02Throttling agent actions and limiting costly API usage
- 03Managing several MCP servers through a single entry point
MCP support
The Lunar MCPX component aggregates multiple MCP servers into one gateway, providing unified API access along with security and observability controls.
Configuration
Local server config is the same for every client. Copy it into your client’s MCP config file.
We haven’t collected a package or remote endpoint for this server. Follow the instructions in the project README.
Tools
Local servers expose tools only once running on your machine, and the maintainer has not provided a tool list.
Details
From the project README
Welcome to Lunar.dev
Lunar.dev is an open-source platform for managing, governing and optimizing third-party API consumption across applications and AI agent workloads at scale.
Consumption Management for the AI Era
As AI agents and autonomous workflows increasingly rely on external APIs, there's a growing need for a mediation layer that acts as a central aggregation point between applications, agents, and the services they depend on.
Lunar.dev provides that layer—serving as a unified API Gateway for AI, delivering:
- Live API Traffic Visibility: Get real-time metrics on latency, errors, cost, and token usage across all outbound traffic, including LLM and agent calls.
- AI-Aware Policy Enforcement: Control tool access, throttle agent actions, and govern agentic traffic with fine-grained rules.
- Advanced Traffic Shaping: Apply rate limits, retries, priority queues, and circuit breakers to manage load and ensure reliability.
- Cost & Performance Optimization: Identify waste, smooth traffic peaks, and reduce overuse of costly APIs through smart gateway policies.
- Centralized MCP Aggregation: Streamline operations by consolidating multiple MCP servers into a single gateway, enhancing security, observability, and management.
Choose Your Path
Lunar.dev is composed of two major components:
- Lunar Proxy – our core API gateway and control layer
- Lunar MCPX – a zero-code aggregator for multiple MCP servers with unified API access
Explore the one that fits your needs—or use both for a full-stack solution.
Open Source at the Core
This project was born out of the need for a more robust, production-ready approach to managing third-party APIs. It remains open-source at its core and free for non-production/personal use. For production environments, we offer advanced features through guided onboarding and platform tiers; visit our website or reach out directly for more information
Comments
New to MCP?
From what the protocol is to installing your first server, these answers cover most first questions.
An open protocol that defines how AI applications connect to external tools and data in a uniform way. Clients talk to the model; MCP servers provide tools, resources and prompt templates. They exchange standard messages, so one server can be reused by many clients.