llms.txt
+10 −9
https://changefeed.anthonyzilar.workers.dev/llms.txt
− > Breaking changes, deprecations and security fixes for 38 popular APIs and SDKs (LLM SDKs, Stripe, Next.js, React, Node, Python frameworks, cloud SDKs). Built for AI coding agents whose training data is out of date. Paid per call with x402 (USDC on Base); no account or API key.− Call GET /v1/upgrade-check?package=<npm or pypi name>&from=<version your code targets> before writing code against a library you may know only from older training data. It returns every breaking change, deprecation and security fix between that version and the latest release, plus every major version crossed. Use GET /v1/sources (free) to see which packages are tracked, and GET /v1/preview (free) to check freshness. Paid routes answer HTTP 402 with x402 payment terms; any x402 client pays in USD− - [Sources](https://changefeed.anthonyzilar.workers.dev/v1/sources): every API/SDK we track, with package names you can query by.− - [Preview](https://changefeed.anthonyzilar.workers.dev/v1/preview): latest five breaking/deprecation/security headlines.− - [OpenAPI](https://changefeed.anthonyzilar.workers.dev/openapi.json) with x-payment-info on paid operations.− - [MCP server](https://changefeed.anthonyzilar.workers.dev/mcp) (Streamable HTTP): free tools list_sources and preview_changes; paid tools upgrade_check, get_changes and digest (x402).− - [Upgrade check](https://changefeed.anthonyzilar.workers.dev/v1/upgrade-check?package=next&from=14.2.0) ($0.01): what broke, what's deprecated and what's patched since your version.− - [Changes](https://changefeed.anthonyzilar.workers.dev/v1/changes?source=stripe&kinds=breaking,deprecation) ($0.005): filterable change records by source, date and kind.− - [Digest](https://changefeed.anthonyzilar.workers.dev/v1/digest?since=2026-10-01) ($0.02): everything breaking across all tracked sources since a date.+ > Breaking changes, deprecations and security fixes for 60 popular APIs and SDKs (LLM SDKs, Stripe, Next.js, React, Vue, Svelte, Angular, Node, pandas, NumPy, Python frameworks, cloud SDKs). Built for AI coding agents whose training data is out of date. Free quick check; full reports paid per call with x402 (USDC on Base); no account or API key.+ Before writing code against a library you may know only from older training data, call GET /v1/quick-check?package=<npm or pypi name>&from=<version your code targets> (prefix the name with npm: or pypi: when it exists in both registries, e.g. pypi:openai) (free, about 20 calls a minute per client): it says whether anything broke since that version, which major versions were crossed, and how many breaking changes, deprecations and security fixes there are, with the top three breaking headlines. F+ - [Quick check](https://changefeed.dev/v1/quick-check?package=next&from=14.2.0): did anything break since my version? Verdict, counts and the top three breaking headlines. Rate-limited per client.+ - [Sources](https://changefeed.dev/v1/sources): every API/SDK we track, with package names you can query by.+ - [Preview](https://changefeed.dev/v1/preview): latest five breaking/deprecation/security headlines.+ - [OpenAPI](https://changefeed.dev/openapi.json) with x-payment-info on paid operations.+ - [MCP server](https://changefeed.dev/mcp) (Streamable HTTP): free tools quick_check, list_sources and preview_changes; paid tools upgrade_check, get_changes and digest (x402). Claude Code: claude mcp add --transport http changefeed https://changefeed.dev/mcp+ - [Upgrade check](https://changefeed.dev/v1/upgrade-check?package=next&from=14.2.0) ($0.01): what broke, what's deprecated and what's patched since your version.+ - [Changes](https://changefeed.dev/v1/changes?source=stripe&kinds=breaking,deprecation) ($0.005): filterable change records by source, date and kind.+ - [Digest](https://changefeed.dev/v1/digest?since=2026-10-01) ($0.02): everything breaking across all tracked sources since a date.