What is mockzilla-mcp?

A local MCP server that creates a mock API from an OpenAPI specification. OpenAPI is a machine-readable description of an HTTP API, and the mock server can be used with Claude, Cursor, or Gemini CLI.

Use it to start a local mock of an OpenAPI-described API and try requests from supported AI coding tools.

It lets you test against a local version of an API when the real service is unavailable or unsuitable for development. It requires three environment variables to run.

mockzilla-mcp — MCP server by mockzilla

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Clone the repo

git clone --depth 1 https://github.com/mockzilla/mockzilla-mcp

Made for: Claude Code, Codex, Cursor, Gemini CLI, OpenCode.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

README.md

[![agentmods](https://agentmods.dev/badge/mcp/mockzilla/mockzilla-mcp/mockzilla-mcp/github.svg)](https://agentmods.dev/mcp/mockzilla/mockzilla-mcp/mockzilla-mcp)

Your own site

<a href="https://agentmods.dev/mcp/mockzilla/mockzilla-mcp/mockzilla-mcp"><img src="https://agentmods.dev/badge/mcp/mockzilla/mockzilla-mcp/mockzilla-mcp/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

Your own site · 80×15

<a href="https://agentmods.dev/mcp/mockzilla/mockzilla-mcp/mockzilla-mcp"><img src="https://agentmods.dev/badge/mcp/mockzilla/mockzilla-mcp/mockzilla-mcp.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session not measured What this adds to a session before it is invoked.

When invoked not measured Not applicable: nothing here is loaded into a session.

Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.

Origin 86% copy Near-identical to another mod in the catalogue.

Security

Grade A, and why

mockzilla-mcp scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 1mo ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

Origin

This is a copy

86% identical to haravan-mcp — 11 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.

server.json · 14 lines

What it actually says

{
  "mockzilla-mcp": {
    "command": "npx",
    "args": [
      "-y",
      "@mockzilla/mcp"
    ],
    "env": {
      "MOCKZILLA_TOKEN": "",
      "MOCKZILLA_MCP_URL": "",
      "MOCKZILLA_MANAGED_PORT": ""
    }
  }
}

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

1mo ago First seen · 14 lines scan A d61ec3fe95b5

Subscribe to this mod's changes

mockzilla-mcp is an MCP server published in the GitHub repository mockzilla/mockzilla-mcp (5 stars, last pushed 15d ago), licensed MIT. Its token cost is not measured: an MCP server costs its tool schemas, not its config file. A static security scan graded it A with 0 findings. It is 86% identical to haravan-mcp, differing in 11 lines, and is treated as a copy.

Backend and APIs Testing ai-tools api-simulation claude-desktop cursor developer-tools gemini-cli

mockzilla-mcp

Getting it into your agent

Wrote this? Show the measurements

Grade A, and why

Nothing flagged

This is a copy

What it actually says

What this file has done since we first saw it

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