Adds modules/kubernetes/x402_instance/ — a small Go reverse proxy
(forgejo.viktorbarzin.me/viktor/x402-gateway:ce333419) that selectively
issues HTTP 402 Payment Required to declared AI-bot User-Agents and
validates X-PAYMENT headers against a Coinbase x402 facilitator.
Browsers are forwarded transparently to Anubis (which then handles the
JS PoW gate as before).
Wired into all nine Anubis-fronted sites:
ingress -> x402-X -> anubis-X -> backend
While `wallet_address` is empty the gateway runs in DRY_RUN — every
request is transparent-proxied, no 402s issued. This lets the pod sit
in the request path with zero behavioural impact today; flipping the
wallet variable in the per-stack module call activates payment-required
mode for AI-bot UAs.
Default config: Base mainnet USDC, $0.01/req, x402.org/facilitator,
catch-all UA list (ClaudeBot|GPTBot|Bytespider|meta-externalagent|
PerplexityBot|GoogleOther|cohere-ai|Diffbot|Amazonbot|
Applebot-Extended|FacebookBot|ImagesiftBot|YouBot|anthropic-ai|
Claude-Web|petalbot|spawning-ai|scrapy|python-requests).
Verified post-apply: 9/9 pods Running, all 9 sites still serve the
Anubis challenge to plain curl with identical TTFB, x402 logs confirm
"dry_run":true on every instance.
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