# agentgateway

> An open-source Rust proxy for agent-to-LLM, agent-to-tool (MCP) and agent-to-agent (A2A) traffic.

## Facts
- **Category:** [MCP Servers](https://agentsearchengine.app/category/mcp-servers)
- **Type:** Infrastructure
- **Pricing:** Open source
- **GitHub stars:** 4,993
- **Language:** Rust
- **License:** Apache-2.0
- **Last repo activity:** today (Sep 23, 2026)
- **Official site:** https://agentgateway.dev
- **Source code:** https://github.com/agentgateway/agentgateway
- **Listing on Agent Search Engine:** https://agentsearchengine.app/agents/agentgateway
- **Data verified:** September 2026

## Best for
Teams running many agents who need central policy, spend control and telemetry for LLM, tool and agent calls.

## About agentgateway
agentgateway is an open-source proxy built on MCP and A2A that adds security, observability and governance to agent traffic. It routes LLM calls to major providers through an OpenAI-compatible API with budget controls, load balancing and failover; federates MCP tools across stdio, HTTP, SSE and streamable HTTP with OpenAPI integration and OAuth; and secures agent-to-agent communication.

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Source: [Agent Search Engine](https://agentsearchengine.app) — an independent, hand-curated index of AI agents, MCP servers, and frameworks. Rankings are never sold; sponsored placements are labeled and never numbered. Full directory: https://agentsearchengine.app/llms-full.txt