mcpbeat

API Composition Gateway MCP Server

io.github.lazymac2x/api-composition-gateway
answering

API Composition Gateway is answering right now. Last checked 15 min ago. It exposes 4 tools. Last commit 20 Apr 2026.

Cloudflare Workers MCP server: api-composition-gateway

Uptime history 39 hours of history
39 hours agonow
100.0%
Uptime 24h
91 of 91 checks
4
Tools
read from the server
153 ms
Response time
average over 24h
0
Stars
last commit 20 Apr 2026

Connect this server

Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 15 min ago.

run in your terminal
claude mcp add api-composition-gateway --transport http https://api.lazy-mac.com/api-composition-gateway/mcp
~/Library/Application Support/Claude/claude_desktop_config.json
{
  "mcpServers": {
    "api-composition-gateway": {
      "url": "https://api.lazy-mac.com/api-composition-gateway/mcp"
    }
  }
}
~/.codex/config.toml
[mcp_servers.api-composition-gateway]
url = "https://api.lazy-mac.com/api-composition-gateway/mcp"
.cursor/mcp.json
{
  "mcpServers": {
    "api-composition-gateway": {
      "url": "https://api.lazy-mac.com/api-composition-gateway/mcp"
    }
  }
}
.vscode/mcp.json
{
  "mcpServers": {
    "api-composition-gateway": {
      "url": "https://api.lazy-mac.com/api-composition-gateway/mcp"
    }
  }
}

Available tools 4

Read directly from the server with tools/list, grouped by what they act on. If a tool disappears, we record the date.

api
api-merger
Merge multiple API responses into a single unified response keyed by a shared field.
error
error-aggregator
Aggregate and surface errors from multiple data sources with optional simulation.
field
field-selector
Select specific fields from a data source (GraphQL-style projection).
response
response-cache-manager
Manage in-memory response caching with TTL and invalidation (per-isolate, best-effort).

Endpoints

URLTransportStateLatencyChecked
https://api.lazy-mac.com/api-composition-gateway/mcp streamable-http answering 196 ms 15 min ago

API Composition Gateway — questions

Answers built from our own checks of this server.

What can API Composition Gateway do?
It exposes 4 tools, read directly from the server on our last check. Among them: api-merger, error-aggregator, field-selector, response-cache-manager. The full list with descriptions is on this page — we take it from the server itself via tools/list, not from a README. How MCP servers expose tools in the first place →
Is API Composition Gateway working right now?
We send a real MCP handshake every 15 minutes. Over the last 24 hours 91 of 91 checks got a reply (100.0%), average response time 153 ms. The bar chart above shows every period we have measured.
How do I connect API Composition Gateway?
Copy the ready config from this page — we generate it for Claude Code, Claude Desktop, Codex, Cursor and VS Code, each with the file path that client actually reads. It is a remote server, so there is nothing to install — the client connects to the address.
Does API Composition Gateway need an API key?
No. API Composition Gateway completed a full MCP handshake with us as an anonymous client and listed its tools without asking for anything. All 4 of them are readable on this page. This is what we observed, not what the docs claim.
How fast is API Composition Gateway?
It answers our handshake in 153 ms on average, which is faster than 73% of all working MCP servers we measure. The comparison comes from our own checks across the whole registry, every 15 minutes.
Is API Composition Gateway open source?
Yes — written in JavaScript and 0 stars on GitHub. The source link is on this page, so you can read exactly what it does with your data before you connect it.