API Composition Gateway MCP Server

by lazymac2x Your server? Claim it

answering

API Composition Gateway is answering right now. Last checked 12 min ago. It exposes 4 tools. Last commit 20 Apr 2026.

Cloudflare Workers MCP server: api-composition-gateway

Uptime history 47 days of history

47 days agonow

100.0%

Uptime 24h

91 of 91 checks

Tools

read from the server

167 ms

Response time

average over 24h

Stars

last commit 20 Apr 2026

Nothing serious here today

Today is the operative word: we check API Composition Gateway every 15 minutes and re-read its code on every release. Watch it and you find out the day that stops being true.

Connect this server

Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 12 min ago.

Claude Code Claude Desktop Codex Cursor VS Code

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

URL	Transport	State	Latency	Checked
https://api.lazy-mac.com/api-composition-gateway/mcp	streamable-http	answering	76 ms	12 min ago

Alternatives to API Composition Gateway

same job, measured the same way

AI Gateway

by lazymac2x

Cloudflare Workers MCP server: ai-gateway

answering

API Mock Server

by lazymac2x

Cloudflare Workers MCP server: api-mock-server

6 tools answering

API Diff Monitor

by lazymac2x

Cloudflare Workers MCP server: api-diff-monitor

6 tools answering

API Perf Analyzer

by lazymac2x

Cloudflare Workers MCP server: api-perf-analyzer

4 tools answering

API Flow Analyzer

by lazymac2x

Cloudflare Workers MCP server: api-flow-analyzer

6 tools answering

Blog

by lazymac2x

Cloudflare Workers MCP server: blog

3 tools answering

AI Eval

by lazymac2x

Cloudflare Workers MCP server: ai-eval

3 tools answering

Cron Parser

by lazymac2x

Cloudflare Workers MCP server: cron-parser

6 tools answering

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 167 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 167 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?

We cannot say either way: written in JavaScript and 0 stars on GitHub, but we could not determine the licence, and without one the code is not open source by default.