The agent economy just got a Cardano rail, according to a recent major update. In an X post, the Cardano Foundation shared that Cardano is now part of the official x402 SDK, opening the door for applications and AI agents to make payments using ADA and Cardano Native Tokens (CNTs).
"JUST IN: Cardano is now part of the official x402 SDK. Any app or AI agent can pay for an API call in ADA or any CNT over a web request," Cardano Foundation posted.
Being part of the official x402 SDK, API calls can be paid for in ADA by apps or AI agents, which can also use any CNT over a web request. This requires no account, no API key, and no checkout page, as every service already on x402 can switch Cardano on. "The agent economy just got a Cardano rail," the Cardano Foundation wrote.
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JUST IN: Cardano is now part of the official x402 SDK.
Any app or AI agent can pay for an API call in $ADA or any CNT over a web request. No account, no API key, no checkout page.
Every service already on x402 can switch Cardano on.
The agent economy just got a Cardano rail. pic.twitter.com/SWZHczf9oC
x402 is the open HTTP payments standard that Coinbase created and the Linux Foundation now stewards.
The Cardano Foundation joined x402 as an Associate Member under the Linux Foundation in July 2026. Other members include Visa, Mastercard, Stripe, Google, AWS, and Coinbase.
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x402 is an open payment standard that revives the HTTP 402 status code so that applications and AI agents can pay per request in stablecoins without accounts, API keys, or a checkout page.
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