OpenAPI to MCP

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Turn any API into an MCP server

A stateless proxy that dynamically creates an MCP server from any OpenAPI schema, enabling seamless integration with tools like Prompteus, Claude, and Cursor.

Generate Your MCP server URL

Generated MCP URL:

This is a best-effort base service. We're proxying the requests for free and not retaining any usage information.

How It Works

This service acts as a stateless proxy between MCP clients and OpenAPI-documented APIs. It requires basic endpoint configuration, which is passed as a base64url-encoded JSON object in the URL.

1. Create Configuration

Create a configuration payload with your API's base URL and schema URL to connect to your OpenAPI service.

2. Generate URL

The configuration is encoded as base64url and appended to the MCP server URL, creating your custom endpoint.

3. Connect Tools

Use the resulting MCP server URL with your preferred tools like Prompteus, Cursor, VS Code, Windsurf, etc.

Integration Examples

Connect your MCP server to your favorite development tools with these simple configurations.

  1. Navigate to the MCP Servers page in Prompteus
  2. Click the Import MCP Server button
  3. Enter the MCP server URL:
  1. Click Fetch to validate and initialize the server
  2. Optionally add a Friendly Name to distinguish between multiple MCP servers
  3. Select the desired Tools and Resources from the available options
  4. Click Import to complete the setup
To use the MCP server in a Neuron workflow:
  1. Add a Call AI Model node to your workflow
  2. In the node's settings, select your MCP server from the dropdown
  3. You can select multiple MCP servers for a single workflow
  4. The selected tools and resources will be available for use in your workflow

Built by Prompteus

This tool is built by the team at Prompteus. We're helping developers ship AI features in minutes not days, with tools like orchestration, caching, LLM request routing and observability.

Learn more about Prompteus