agentmods.dev

openapi-mcp-gateway

A tool for finding or creating a configuration that connects an API to an MCP gateway. OpenAPI is a machine-readable description of an API; the configuration can limit operations and reshape their inputs and outputs.

In plain words
What is it for?
Use it to obtain an API's OpenAPI specification, choose which operations agents may use, and shape tool inputs and outputs with JSONata.
Why use it?
It helps turn an API description into a controlled set of agent tools without exposing every API operation or its raw response shape.

Plugin for Claude Code

3 2d ago A scan tokens not measured original MIT
View the source file mroops0111/openapi-mcp-gateway
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.

Claude Code
/plugin marketplace add mroops0111/openapi-mcp-gateway
agentmods
npx agentmods add plugins/mroops0111/openapi-mcp-gateway/plugin
Clone the repo
git clone --depth 1 https://github.com/mroops0111/openapi-mcp-gateway

Made for: Claude Code.

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. Scan, not verified.
Origin original No closer match found in the catalogue.
Security

Grade A, and why

openapi-mcp-gateway 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 yesterday.

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.

plugin/.claude-plugin/plugin.json · 12 lines

What it actually says

{
  "name": "openapi-mcp-gateway",
  "description": "Find or generate an openapi-mcp-gateway config for any API. Acquire its OpenAPI spec, scope operations with policy, and shape tools with JSONata.",
  "version": "0.6.3",
  "author": {
    "name": "Yun-Tai Yang"
  },
  "homepage": "https://github.com/mroops0111/openapi-mcp-gateway",
  "license": "MIT",
  "keywords": ["mcp", "openapi", "config", "jsonata"]
}
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.

  1. yesterday First seen · 12 lines scan A 77905741cd20

Subscribe to this mod's changes

openapi-mcp-gateway is a plugin published in the GitHub repository mroops0111/openapi-mcp-gateway (3 stars, last pushed 2d ago), licensed MIT. Its token cost is not measured: this kind of file is read by the harness, not the model. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

Backend and APIsPlanningfastapigatewaymcpoauth2openapiopenapi-to-mcp
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