Free x402 payment-challenge generator with Express/Hono snippets; paid tier adds more frameworks.
Connect Remote server
claude mcp add --transport http tools https://x402gen.sebastiaan-ba3.workers.dev/mcp
{
"mcpServers": {
"tools": {
"url": "https://x402gen.sebastiaan-ba3.workers.dev/mcp"
}
}
}
{
"servers": {
"tools": {
"type": "http",
"url": "https://x402gen.sebastiaan-ba3.workers.dev/mcp"
}
}
}
Settings > Connectors > Add custom connector
URL: https://x402gen.sebastiaan-ba3.workers.dev/mcp
Tools 2 found in our last check
generate_x402_challengeBuild a spec-compliant x402 v2 payment challenge (402 response body) from a price, wallet and network. Returns the challenge JSON, the base64 PAYMENT-REQUIRED header value, a curl test command, and free code snippets (Cloudflare Worker, Express) to return it. Free, no auth. Pre-…
generate_x402_challenge_fullSame as generate_x402_challenge plus 5 more framework snippets (FastAPI, Next.js, Django, Go, Rails, raw Node) and a ready /.well-known/x402.json manifest. Requires payment (USDC on Base, x402) -- NOT callable for free over MCP. Calling this tool returns the exact HTTP request t…
Details
| Endpoint | https://x402gen.sebastiaan-ba3.workers.dev/mcp (Streamable HTTP) |
| First published | 12 Nov 2026 |
| Last updated | 12 Nov 2026 |
| Registry name | dev.workers.sebastiaan-ba3.x402gen/tools |
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