HTTP WG on x402 payments and signature keys

Radar2026-08-31

The IETF HTTP Working Group saw activity on payment-related status codes and signature infrastructure. One thread turned heated over an external project while another weighed a call for adoption of key distribution headers.

Debate over x402 and HTTP 402 semantics

IETF HTTP Working Group members debated the external x402 project hosted by the Linux Foundation. The project defines semantics for the 402 status code and payment headers with a cryptocurrency focus. The heated exchange matters to HTTP developers because it raises questions about who sets core status code behavior outside the working group.

Call for adoption of signature key draft

The HTTP WG opened a call for adoption of draft-hardt-httpbis-signature-key-08 that ends on 2026-09-07. The draft adds key distribution and negotiation headers for RFC 9421 signatures and drew technical objections on complexity. Implementers of HTTP message signatures have a short window to assess whether the working group should take on the work.