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Lunar.dev is an open-source platform formanaging, governing and optimizing third-party API consumption across applications and AI agent workloads at scale.

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.

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.

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