API Change Feed
Tells AI coding agents what changed in the APIs and SDKs they use: breaking changes, deprecations and security fixes for 38 popular libraries (OpenAI, Anthropic, Stripe, Next.js, React, Node and more) since the version their code targets. Free tools list sources and headlines; upgrade checks are paid per call via x402 (USDC on Base).
Hosted MCP Server
npx add-mcp 'https://changefeed.anthonyzilar.workers.dev/mcp'Installs into Claude Code, Codex, Cursor and more
Documentation
x402 · USDC on Base · no API key
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 Built for AI coding agents whose training data is out of date.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.
GET /v1/upgrade-check | $0.01 | Breaking changes, deprecations, security fixes and major versions crossed between the version your code targets and the latest release of a package. |
|---|---|---|
GET /v1/changes | $0.005 | Normalized change records (breaking, deprecation, security, release) for one tracked API/SDK or all of them, filterable by date and kind. |
GET /v1/digest | $0.02 | Cross-ecosystem digest of breaking changes, deprecations and security fixes since a date, grouped by source. |
GET /v1/sources | free | Tracked APIs/SDKs and package names |
GET /v1/preview | free | Latest headlines |
For agents: llms.txt · OpenAPI · x402.json · MCP server: https://changefeed.anthonyzilar.workers.dev/mcp
Testing an integration? The same API runs at /sandbox/v1 with free test USDC and data delayed 30 days.