What is x402? The HTTP payment protocol for AI agents, explained
Article summary
Quick briefing — cleaned from the original RSS feed
Originally published at true402.dev/guides/what-is-x402 . x402 is how software pays software — money over HTTP, using a status code that sat unused for 25 years. No accounts, no API keys, no monthly plans. A request gets a price; the client pays; the result comes back. Here's the whole idea. The 402 finally means something HTTP reserved a status code — 402 Payment Required — back in the 1990s, then left it blank for decades because the web had no native way to pay. x402 fills that blank: a…
1Key Takeaways
- Originally published at true402.dev/guides/what-is-x402 .
- x402 is how software pays software — money over HTTP, using a status code that sat unused for 25 years.
- No accounts, no API keys, no monthly plans.
- A request gets a price; the client pays; the result comes back.
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 originally published at true402.dev/guides/what-is-x402 .
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