# x402 MCP Demo

> x402 MCP Demo — thinkflow-ro-x402-mcp-demo. Use this tool when you need to demonstrate secure payment processing for MCP tools, solving issues of unauthorized access and unpaid usage. It provides a minimal demo of the x402 payment protocol, handling real 402 rejections and testnet payments as inputs and generating secure payment outputs. Ideal for developers and testers requiring a payment-protected MCP tool endpoint in a controlled environment.

Canonical page: https://skillsregistry.net/skills/thinkflow-ro-x402-mcp-demo  
JSON: https://api.skillsregistry.net/v1/skills/thinkflow-ro-x402-mcp-demo

## Description

A minimal demo of the x402 payment protocol protecting an MCP tool endpoint, showing how to charge for MCP tools using real 402 rejections and testnet payments.

## Trust

- **Trust score (0–1):** 0.70
- **Verification tier:** verified
- **Last scanned:** 2026-08-29

## Facts

- **Version:** 1.0.0
- **Skill type:** atomic
- **Execution layer:** mcp-remote
- **Runtime environment:** api
- **Category:** finance
- **Updated:** 2026-08-29

## Source

- **Source listing:** [Glama](https://glama.ai/mcp/servers/j3f5t1bs80)
- **Repository:** <https://github.com/Thinkflow-ro/x402-mcp-demo>

## Use it

Resolve this record through the SkillsRegistry MCP server (no auth, read-only):

```
claude mcp add --transport http --scope user skillsregistry https://api.skillsregistry.net/mcp
```

```json
{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": {
    "name": "get_skill",
    "arguments": {
      "slug": "thinkflow-ro-x402-mcp-demo"
    }
  }
}
```

REST: `GET https://api.skillsregistry.net/v1/skills/thinkflow-ro-x402-mcp-demo` · pull for local use: `GET https://api.skillsregistry.net/v1/skills/thinkflow-ro-x402-mcp-demo/pull`

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SkillsRegistry indexes agent skills from public registries and GitHub. Skills we have analysed are scanned with Circle-IR and scored on six dimensions; each listing states its scan coverage. More: https://skillsregistry.net/llms.txt