Give Your AI Agent a Wallet — x402 Payment Protocol in Practice
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The x402 protocol is simple: when an agent calls a paid API without payment, the server returns HTTP 402 with a payment invoice. The agent pays the invoice, retries with a payment proof header, and gets the result. That's it. Three steps. No API keys, no signup, no monthly subscription. Here's how to implement it from scratch. The Protocol in 3 Steps Step 1: Agent calls → Server returns 402 curl -s https://minia2a.uk/x402/captcha-solve Response (HTTP 402): { "error" : "Payment Required" ,…
1Key Takeaways
- The x402 protocol is simple: when an agent calls a paid API without payment, the server returns HTTP 402 with a payment invoice.
- The agent pays the invoice, retries with a payment proof header, and gets the result.
- No API keys, no signup, no monthly subscription.
- Here's how to implement it from scratch.
2AIWedia Score
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3Why it matters
Coding AI shifts how fast software ships and how much human review each change needs. DEV — AI reports that the x402 protocol is simple: when an agent calls a paid API without payment, the server returns HTTP 402 with a payment invoice.
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