HubVibe: 37 Machine-Payable Dev Utilities and WCAG Audits

37 machine-payable dev utilities (the `workers` section: LLM inference, web search and extraction, Base chain reads, market and prediction-market data, BigQuery analysis and forecasting, image/speech/video generation, sandboxed Python, maps, cited research and verification) and five deterministic site audits (the `endpoints` section: accessibility via axe-core, SEO, security headers, performance, bundle). One price per call, payable by software over HTTP 402 with no account. Every capability carries its input and output JSON Schema here and in /openapi.json; every delivered /work job has a receipt. The audits are rule-based checks against the actual page; a check that could not run is never reported as a pass.