Changelog State API

A machine-payable API that watches release notes and changelogs for 42 monitored vendors and projects — Anthropic, Auth0, Chainlink, Chrome, Circle, Clerk, Cloudflare, DeepSeek Harness, Discord, Docker, Figma, Foundry, Gemini, Geth, GitHub, Hugging Face, Kubernetes, LangChain, Linear, LiteLLM, MCP, NEAR, NEAR API JS, Next.js, Node.js, Notion, OpenAI, OpenZeppelin, Playwright, Prisma, React, Sentry, shadcn/ui, Stripe, Supabase, Twilio, TypeScript, Vercel, viem, Wormhole SDK, x402 and xAI. Structured release and changelog intelligence for agent-critical vendors. It answers two questions: what shipped, and what changed. Breaking is a flag quoted from the source when the source states it — not a prediction that the caller's production will fail. This API does not track SaaS pricing pages or uptime/status pages.

Fleet status and each vendor's headline release are free to read. Structured release history and detected-change history, per vendor, are paid per call over x402 (USDC on Base, verified and settled by the PayAI facilitator).

For agents:

• /llms.txt — plain-language guide to every route, free and paid
• /openapi.json — OpenAPI 3.1 spec (YAML at /openapi.yaml)
• /.well-known/agent.json — agent card
• /.well-known/x402 — x402 payment configuration
• /api/monitors — free fleet catalog, one card per tracked vendor

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