x402 MCP Starter
Free self-hosted x402 USDC billing for Cloudflare MCP servers, with a Base Sepolia test endpoint.
Should I use this
Quality & Safety
A
Based on automated analysis of tool definitions and protocol compliance.
Context Cost
~283Tokens (tool definitions)
~827 BTypical response size
Minimal attention impact (0.22% of 128k context)
This is the approximate number of tokens consumed each time the server's tools are loaded into a model's context. Higher counts reduce the attention available for other tasks.
Install
One-Click Install
Add this to your `claude_desktop_config.json` file:
{
"mcpServers": {
"x402-mcp-starter": {
"url": "https://x402-mcp-starter.kadopi.workers.dev/mcp"
}
}
}Remote endpoints
https://x402-mcp-starter.kadopi.workers.dev/mcpstreamable-httpWhat it can do
Tool inventory
Tools (2)
🟢 Read-only🟡 Write🔴 Delete⚪ Unknown
🟢validate_x402_config(network, asset, amount, priceUsd, payTo, ...)
Free: checks Base USDC, price, amount, recipient, and facilitator settings before you deploy an x402-paid MCP tool.
Input Schema
{
"type": "object",
"properties": {
"network": {
"type": "string",
"enum": [
"eip155:84532",
"eip155:8453"
]
},
"asset": {
"type": "string"
},
"amount": {
"type": "string"
},
"priceUsd": {
"type": "number"
},
"payTo": {
"type": "string"
},
"facilitatorUrl": {
"type": "string"
}
},
"required": [
"network",
"asset",
"amount",
"priceUsd",
"payTo",
"facilitatorUrl"
],
"$schema": "https://json-schema.org/draft/2020-12/schema"
}🟢get_paid_sample(option)
Fixed-price reference path: confirms that an x402-aware MCP client can pay and receive a receipt.
Input Schema
{
"type": "object",
"properties": {
"option": {
"type": "string",
"enum": [
"basic",
"standard",
"extended"
]
}
},
"required": [
"option"
],
"$schema": "https://json-schema.org/draft/2020-12/schema"
}Community
Evidence
Recent observations
verifiedversion not recorded2 tools
verifiedversion not recorded2 tools
verifiedversion not recorded2 tools