- Agents and other automated clients can now pay per call with x402, without provisioning or storing an API key. Call a supported endpoint with no
key parameter, read the price and payment details off the 402 Payment Required response, pay, and retry with the payment header. Full walkthrough: Agentic Payments.
- Coverage extends to more routes, including Recalls by YMM and the rest of the recall workflows.
402 responses now spell out both ways forward — pay for this request, or authenticate with an API key — with a direct link to get one.
- Existing integrations are untouched. Send
key=YOUR_API_KEY and normal API-key billing applies; x402 only kicks in when no key is present.
- Read the price from the
402 response instead of hardcoding it; it can change.
- Built for one-off agent lookups. For steady volume, a plan is cheaper — see Pricing.
