# API Gateway MCP Server (agent skill)

> API Gateway MCP Server is an agent skill (a SKILL.md file) from google/skills. Configures Google Cloud API Gateway to act as a remote Model Context Protocol (MCP) server (Public Preview) that exposes REST APIs as agent tools… It works with Claude Code, Codex and Gemini CLI and has 21,578 GitHub stars across a repository of 7 listed skills.

Configures Google Cloud API Gateway to act as a remote Model Context Protocol (MCP) server (Public Preview) that exposes REST APIs as agent tools over HTTP (POST /mcp). Use when migrating OpenAPI 2.0 specs to OpenAPI 3.x for MCP, annotating specs with x-google-api-management.mcp and x-google-mcp-tool, securing tools/list with JWTs or API keys, connecting Google ADK (McpToolset) or Apigee API hub and Agent Registry, or troubleshooting MCP JSON-RPC errors (-32601, -32602, -32000).

## Key facts

| Fact | Value |
|---|---|
| Repository | https://github.com/google/skills |
| Skill path | skills/cloud/api-gateway-mcp-server/SKILL.md |
| Skill name | api-gateway-mcp-server |
| GitHub stars | 21,578 |
| Installs on skills.sh | 2 |
| License | Apache-2.0 |
| Skills in repo | 7 |
| Plugin marketplace | google-plugins |
| Official | yes |
| Works with | Claude Code, Codex, Gemini CLI |
| Category | Coding |
| Last commit | Oct 25, 2026 |

## When it triggers

- Use when migrating OpenAPI 2.
- use for Apigee X proxy bundles, outbound LLM model routing, or GKE Gateway API.

## Add this skill

### Claude Code

```sh
/plugin marketplace add google/skills
/plugin   # browse google-plugins and install the plugin that contains api-gateway-mcp-server
```

In the Claude apps, zip the skill folder and upload it under Customize > Skills > + > Upload a skill (code execution must be on).

### ChatGPT / Codex

```sh
git clone --depth 1 https://github.com/google/skills.git
cp -r skills/skills/cloud/api-gateway-mcp-server .agents/skills/api-gateway-mcp-server   # repo; ~/.agents/skills for all projects
```

### Cursor

```sh
git clone --depth 1 https://github.com/google/skills.git
cp -r skills/skills/cloud/api-gateway-mcp-server .cursor/skills/api-gateway-mcp-server   # project; ~/.cursor/skills for all projects
```

Sources (checked 2026-10-07): https://code.claude.com/docs/en/skills, https://support.claude.com/en/articles/12512180-using-skills-in-claude, https://learn.chatgpt.com/docs/build-skills, https://cursor.com/docs/context/skills

skills.sh listing: https://www.skills.sh/google/skills/api-gateway-mcp-server

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Canonical page: https://appsgit.com/skills/google-api-gateway-mcp-server
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Machine access: JSON API https://appsgit.com/api/v1/apps (OpenAPI: https://appsgit.com/openapi.json), MCP server https://mcp.appsgit.com/mcp, full index https://appsgit.com/llms-full.txt.