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Openapi MCP Server

by snaggle-ai

Explore OpenAPI v3 specifications, summarize APIs, and inspect the endpoints needed for a task through MCP.

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Install Openapi MCP Server

Pick your client, then add it in one click or paste the config.

Streamable HTTP (Remote)
Server URL
https://openapi-mcp.openapisearch.com/mcp

Remote servers are added in the app, not the config file: Customize → Connectors → Add custom connector, then paste this URL.

Overview

snaggle-ai/openapi-mcp-server MCP server helps AI clients search and explore OpenAPI v3 specifications through oapis.org. It identifies a relevant specification, produces a plain-language overview, and retrieves details for selected API operations. The server accepts specifications in JSON or YAML format. Reach for it when an agent needs to understand an HTTP or REST API from its OpenAPI documentation rather than manually browsing the specification.

Use cases

  • Find the OpenAPI specification for an API
  • Summarize an API specification for an agent
  • Inspect the operations needed for an integration
  • Compare JSON and YAML API documentation formats

Key features

  • OpenAPI specification discovery
  • Plain-language API summaries
  • Operation-level endpoint details
  • JSON and YAML support
  • Hosted MCP endpoint

Tools2

What Openapi MCP Server lets your agent do. Expand a tool for its parameters.

Verified live~1.9k tokens of context

Security & health

What it can reach and how reliably it runs — from our own checks, not the maintainer’s claims.

ActiveLast checked Today

Recent health check succeeded.

17/18 checks healthy over the last 78d

What it can do

From the 2 tools this server returned when we ran it.

Handles credentials · 2Read-only tools · 2

Observed 2026-10-15 in an isolated sandbox. A description of reach, not a security audit.

Supply-chain signal

2 high-severity advisories on record for this package. Most advisories affect transitive dependencies and may not be exploitable in this server's actual usage — this is a directional signal, not a security audit.

Critical 1High 1Medium 0Low 0

Scanned 8/24/2026 via OSV.dev · https://openapi-mcp.openapisearch.com/mcp (npm)

Adoption & maintenance

Factual signals from GitHub, npm, and our automated checks — not a rating.

GitHub stars905Stargazers on the source repository.
Last commit3mo agoMost recent push to the default branch.
Tools exposed2Callable tools this server registers over MCP.
Directory activity1 upvotesConfig copies, upvotes, and views on AllMCPs.

How Openapi MCP Server works

What snaggle-ai/openapi-mcp-server MCP server does

snaggle-ai/openapi-mcp-server MCP server exposes OpenAPI specification discovery and inspection to MCP-compatible clients. It is designed for working with API documentation available through oapis.org, helping an agent move from a broad API request to the specific operations that may satisfy it.

The workflow has three stages. First, the server identifies the OpenAPI specification relevant to the request. Next, it returns a summary in simpler language. Finally, it narrows the specification to the required endpoints and explains how those operations work. This makes the server useful for understanding an API contract before writing integration code or deciding which request to make.

The documented capabilities concern searching and exploring specifications. The material does not state that the server executes API operations or sends requests to the APIs described by those specifications.

How it works

The service uses oapis.org as the source for OpenAPI information. An MCP client sends a request to explore an API, and the server performs the identification, summarization, and operation-detail steps on the client’s behalf. The specification data may be represented as JSON or YAML.

A hosted MCP endpoint is provided at https://openapi-mcp.openapisearch.com/mcp. The README also identifies Claude Desktop and Cursor as tested clients. For local development, the repository instructs users to start the project with wrangler dev, then use the MCP Inspector separately for testing.

Setup and configuration

For a client that accepts remote MCP servers, configure the hosted endpoint directly:

https://openapi-mcp.openapisearch.com/mcp

The README includes an installation link for an MCP installation service, but the direct MCP URL is the clearest configuration detail provided for other clients.

Local testing uses the following sequence:

  1. Run wrangler dev from the project.
  2. Start the MCP Inspector with npx @modelcontextprotocol/inspector.

Tools and capabilities

The documented capabilities of the snaggle-ai/openapi-mcp-server MCP server are:

  • Find the OpenAPI specification associated with an API request.
  • Present an overview of an OpenAPI specification in simple language.
  • Retrieve details for specific API operations.
  • Work with OpenAPI documents in JSON and YAML formats.
  • Expose the functionality through MCP for clients including Claude Desktop and Cursor.

These capabilities make it a documentation exploration layer for HTTP and REST APIs. They should not be interpreted as evidence that the server authenticates to, calls, or mutates the underlying APIs.

Limitations and notes

It also does not describe credentials for APIs documented by the specifications.

The hosted endpoint is therefore the documented path for clients that support remote MCP connections.

Read the full README View source on GitHub

Reviews

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Frequently Asked Questions about Openapi MCP Server

Use the hosted MCP URL https://openapi-mcp.openapisearch.com/mcp in a client that supports remote MCP servers.

Yes.

Yes. Cursor is listed among the tested clients.

Yes. The documented features include support for both JSON and YAML formats.

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