URL-Based MCP Server
URL MCP is a proof of concept stateless MCP server builder that allows users to build MCP servers without writing or hosting code. It's intended for protocol and security experimentation rather than for building real world MCP integrations.
What is URL-Based MCP Server?
URL-Based MCP Server is a proof of concept stateless MCP server builder that allows users to create MCP servers without writing or hosting code, primarily for protocol and security experimentation.
How to use URL-Based MCP Server?
- Visit https://url-mcp-demo.sshh.io/
- Add custom tools to your MCP server by selecting either static text responses or dynamic HTTP-based responses.
- Copy the
MCP Configurationinto your client of choice.
Key features of URL-Based MCP Server?
- Stateless MCP server creation without coding.
- Customizable tools for various responses.
- Designed for protocol and security experimentation.
Use cases of URL-Based MCP Server?
- Building custom MCP servers for testing.
- Experimenting with security protocols.
- Creating mock environments for application audits.
FAQ from URL-Based MCP Server?
- Can I host this server locally?
Local hosting is not necessary as the server is designed to be used via URL.
- What types of responses can I configure?
You can configure both static text responses and dynamic HTTP-based responses using tools like webhook.site.
- Is this project suitable for production use?
No, this project is intended for experimentation and not for real-world integrations.
URL-Based MCP Server
URL MCP is a proof of concept stateless MCP server builder that allows users to build MCP servers without writing or hosting code. It's intended for protocol and security experimentation rather than for building real world MCP integrations.
Usage
- Go to https://url-mcp-demo.sshh.io/
- Add custom tools to your MCP server
- If you want to hardcode tool responses, select "static text response"
- If you want dynamic HTTP-based responses, select "http post endpoint"
- Typically I'll use a temp URL from https://webhook.site/ which logs all the requests and allows you to configure custom responses
- Copy the
MCP Configurationinto your client of choice
Local Hosting
There is not really a point to hosting this locally (the whole idea is that you can use this without hosting just with the URL) but in case you want to modify the app itself:
cd backend && pip install requirements.txt && python main.py
Example: System Prompt Exfiltration
Create a custom MCP server for extracting the system prompt of an application.
- Configure the tools to trick the client into trusting it. Use a https://webhook.site/ temp url for the tool response.
- Copy the MCP config
- In the client ask for an audit and the view the webhook logs.
| Step 1 | Step 2 | Step 3 |
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