Test your x402 payment flow before you charge a cent

Listed by x402AgentPay LLC — api service, free per request, settled in USDC on Base via x402. Listing facts as of October 2026.

x402 Sandbox Wizard

x402AgentPay LLC

FREE

Free forever
Real EIP-712 signing
Dry-run before settle

Endpoint

https://x402-agent-pay.com/sandbox/

Open endpoint

What it does

The x402 Sandbox Wizard lets an agent configure, sign, verify, and dry-run a settlement against the live facilitator before any charge. It is free, and the schema is taken from the production code.

Try it

This endpoint is free. No X-Payment header is required.

curl -sS  'https://x402-agent-pay.com/sandbox/'