Enables large language models to interact with and utilize REST APIs by providing configured REST APIs as context.
If you already use Openapi, the openapi mcp server is the piece that lets your assistant work with it directly. Enables large language models to interact with and utilize REST APIs by providing configured REST APIs as context.
Enables large language models to interact with and utilize REST APIs by providing configured REST APIs as context.
The toolset is worth reading before you wire it up, because it tells you what the integration is really for:
Configuration — The Configuration tool exposed by this serverConfiguration is passed through the environment: DEBUG, API_BASE_URL, OPENAPI_SPEC_PATH, API_HEADERS, API_WHITE_LIST, TWINE_USERNAME. Treat anything key-shaped as a real credential — scope it to the minimum the server needs, and rotate it if it ever lands in a shared config.
Installation goes through your MCP client rather than a global install: point it at openapi_mcp_server on PyPI and it is fetched when the client starts. The copy-paste blocks for Claude Desktop, Claude Code and Cursor are further down this page.
Among the developer tooling options, the useful question is rarely "what can it do" but "what does it cost you to run" — permissions, credentials, and how much of your context its toolset consumes. Openapi's toolset — Configuration — is a fair guide to whether it matches your workflow. It is maintained by rahgadda; worth a glance at recent repository activity before you build anything load-bearing on it.
SyncDev reviews every entry in this directory against the project's own documentation before publishing, and revisits them as servers change.
| Tool | What it does |
|---|---|
| Configuration | The Configuration tool exposed by this server. |
{
"mcpServers": {
"openapi-3": {
"command": "uvx",
"args": ["openapi_mcp_server"],
"env": {
"DEBUG": "your-value",
"API_BASE_URL": "your-value",
"OPENAPI_SPEC_PATH": "your-value",
"API_HEADERS": "your-value",
"API_WHITE_LIST": "your-value",
"TWINE_USERNAME": "your-value"
}
}
}
}Add to claude_desktop_config.json, then restart Claude Desktop.
| Variable | Description | Required |
|---|---|---|
| DEBUG | Configuration value read at startup. | Optional |
| API_BASE_URL | Endpoint or connection string the server talks to. | Yes |
| OPENAPI_SPEC_PATH | Filesystem location the server is allowed to use. | Optional |
| API_HEADERS | Configuration value read at startup. | Optional |
| API_WHITE_LIST | Configuration value read at startup. | Optional |
| TWINE_USERNAME | Configuration value read at startup. | Optional |
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