RFC 9421 and Open wbauth Protocol Accelerate AI Agents 5.5x by Replacing Anti-Detect Browsers with Cryptographic Signatures
A new open implementation of the IETF RFC 9421 HTTP Message Signatures standard called wbauth allows AI agents to authenticate using Ed25519 cryptographic signatures instead of resource-heavy anti-detect browser farms. The approach eliminates the need for Camoufox, Playwright, or AdsPower instances that consume 500 MB to 1.5 GB of RAM per process and require residential proxy pools. Benchmarks show cold start time dropping from 1744 ms to 5 ms, request time from 86.8 ms to 15.8 ms, and memory usage from 500 MB to 0.76 MB. The system uses three HTTP headers for signing and verification against a public key directory hosted on Cloudflare Workers and D1. Server-side validation at the WAF or edge involves fetching the public key, canonicalizing the message per RFC 9421, verifying the Ed25519 signature, and checking timestamps to prevent replay attacks. The npm package wb-auth@0.4.0 and PyPI package wbauth-sdk==0.4.0 provide ready-to-use signers for Node, Bun, Deno, Python httpx, and requests. The full source is available on GitHub under the MrKoriy/wbauth repository.
HabrOct 16, 2026Translated from Russian