How to install Sezzlee OpenAPI in Gemini CLI

Gemini CLI was replaced by Antigravity CLI in June 2026. On an enterprise licence or paid API key you can still install Sezzlee OpenAPI by running "gemini mcp add sezzlee-openapi npx -y @sezzlee/openapi-mcp", then type /mcp to check it.

Built from the published package · server updated yesterday

Run the install command

In a terminal, run:

gemini mcp add sezzlee-openapi npx -y @sezzlee/openapi-mcp

2
Check it
Inside Gemini CLI, type /mcp to list servers and tools.

MCP servers run with your permissions. If Sezzlee OpenAPI needs an API key, add it under env in the config. Check its README.

Install Sezzlee OpenAPI in another app

Claude Code Claude Desktop Cursor VS Code Windsurf Codex Antigravity CLI ChatGPT

Similar servers

mockserver mock-server

100

Mock, record/replay, verify and chaos-test any HTTP, REST, gRPC or LLM dependency over MCP.

AAA Local 5.0k

XcodeBuildMCP getsentry

100

XcodeBuildMCP provides tools for Xcode project management, simulator management, and app utilities.

AAA Local 6.5k

Repowise repowise-dev

Codebase intelligence for AI coding agents — graph, git history, docs, decisions, code health.

ACA Local 7.9k

Questions

Does Sezzlee OpenAPI work in Gemini CLI?

Yes. Gemini CLI supports local and remote mcp servers, extensions (legacy), and Sezzlee OpenAPI installs with the steps above.

Sezzlee OpenAPI does not show up in Gemini CLI. What now?

Restart Gemini CLI fully, check the JSON is valid, and make sure Node.js (for npx) is installed. See common MCP errors and fixes.

Is Sezzlee OpenAPI safe?

It scores 81 of 100. Review the code before you install it, and only give it the access it needs. Grades and details.