MCP Gateway Pro

MCP Server Aggregator & Proxy

Connect AI agents to any combination of MCP servers and REST APIs through a single endpoint that runs in your own AWS account. API-key authentication, per-key rate limits, routing, and analytics, so your agents reach every tool the same way.

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Included in the AppXen Platform appliance

What it does

MCP Gateway Pro is the "API Gateway for the agent era." An AI agent (Claude, Bedrock Agent, custom LangChain/Strands agent, etc.) connects to a single AppXen gateway endpoint. When the agent calls tools/list, Gateway Pro aggregates tools from all registered upstream MCP servers and returns a unified catalog.

When the agent calls tools/call, Gateway Pro routes the request to the correct upstream server, handles auth, enforces rate limits, and records the request for the console's analytics.

Architecture

Agent Layer

Claude Bedrock Agent LangChain Strands Custom

MCP over Streamable HTTP

MCP Gateway Pro

Auth → Rate Limit → Router → MCP Client Pool

Analytics ← Logging

Servers & Extensions

GitHub

MCP

Internal API

REST API

CloudWatch

Extension

RAG Engine

Built-in

REST API Proxy

New

Turn any REST API into MCP tools. Provide an OpenAPI spec (3.0, 3.1, or Swagger 2.0) and Gateway Pro auto-discovers endpoints, generates tool definitions, and handles HTTP translation at runtime. Your agents call MCP tools — the gateway makes HTTP requests. No custom server code needed.

OpenAPI auto-discovery Up to 200 endpoints per API Bearer & API key auth Path, query, body params

Read the docs

Extensions & Built-in Services

New

Extend your gateway with pre-built integrations that run as isolated MCP server subprocesses. Enable an extension like AWS CloudWatch from the gallery, provide your credentials, and the gateway handles the rest. Built-in services like RAG Engine and Media Storage are always available with zero configuration.

One-click enable Encrypted credential storage Isolated subprocess execution AWS CloudWatch extension

Read the docs

Key Features

Unified Authentication

Agents authenticate with an API key sent as a Bearer header. The gateway holds the credentials for your upstream servers, so agents never see them.

Rate Limiting

A per-minute limit on each API key, 1,000 by default. Protect upstream servers and control costs.

Real-time Analytics

Request volume, latency P50/P95/P99, error rates, top tools by usage.

Tool Aggregation

Namespaced tools from multiple MCP servers, served from a single endpoint.

Gallery & Extensions

Browse MCP servers and extensions from the gallery. One-click setup for GitHub, Neon, CloudWatch, and more.

Media & Storage

Built-in file upload, cloud storage, and media management accessible as MCP tools.

Example Request

# Agent calls a GitHub tool through Gateway

POST https://<your-appliance-host>/mcp
Authorization: Bearer <your API key>
{
  "jsonrpc": "2.0",
  "method": "tools/call",
  "params": {
    "name": "github__create_issue",
    "arguments": {
      "repo": "appxen/gateway",
      "title": "Bug: rate limiter not resetting"
    }
  }
}

Pricing

Included in the AppXen Platform appliance: from $0.149 per instance-hour or $949 per year on the large instance types ($0.199 or $1,299 on the xlarge types), billed hourly or annually through AWS Marketplace, plus your own AWS usage and Amazon Bedrock tokens, billed by AWS. AppXen does not meter requests, storage or tokens.

Learn more

Specs

Transports SSE, Streamable HTTP

Registered servers Up to 25

API keys Up to 10

Rate limit 1,000 / min per key

REST endpoints 200 per API

Resources

Documentation Subscribe on AWS Marketplace Contact Support

Run MCP Gateway Pro in your AWS account

MCP Gateway Pro ships inside the AppXen Platform appliance. It runs in your AWS account on your own Amazon Bedrock, billed hourly or annually through AWS Marketplace, plus your own AWS usage.

Subscribe on AWS Marketplace Read the Docs