API Change Feed MCP Server

by workers-anthonyzilar-changefeed Your server? Claim it

answering

API Change Feed is answering right now. Last checked moments ago. It exposes 6 tools.

Breaking changes, deprecations and security fixes for 38 popular APIs/SDKs. Paid per call via x402.

Uptime history 72 hours of history

72 hours agonow

100.0%

Uptime 24h

92 of 92 checks

Tools

read from the server

282 ms

Response time

average over 24h

open, no key

Access

streamable-http

What changed 2

Every tool that appeared, vanished or quietly changed what it asks for. Recorded since 6 November 2026. No other catalogue keeps this.

6 Nov a tool appeared quick_check

6 Nov a tool changed version

Nothing serious here today

Today is the operative word: we check API Change Feed every 15 minutes and re-read its code on every release. Watch it and you find out the day that stops being true.

Connect this server

Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 0 min ago.

Claude Code Claude Desktop Codex Cursor VS Code

run in your terminal

claude mcp add api-change-feed --transport http https://changefeed.anthonyzilar.workers.dev/mcp

Settings → Connectors → Add custom connector, then paste this address

https://changefeed.anthonyzilar.workers.dev/mcp

~/.codex/config.toml

[mcp_servers.api-change-feed]
url = "https://changefeed.anthonyzilar.workers.dev/mcp"

.cursor/mcp.json

{
  "mcpServers": {
    "api-change-feed": {
      "url": "https://changefeed.anthonyzilar.workers.dev/mcp"
    }
  }
}

.vscode/mcp.json

{
  "servers": {
    "api-change-feed": {
      "type": "http",
      "url": "https://changefeed.anthonyzilar.workers.dev/mcp"
    }
  }
}

Available tools 6

Read directly from the server with tools/list, grouped by what they act on. If a tool disappears, we record the date.

changes

get_changes

Normalized change records (breaking, deprecation, security, release) for one tracked API/SDK or all of them, filterable by date and kind. Costs $0.005 (x402, USDC).

digest

digest

Everything breaking, deprecated or security-related across all tracked sources since a date, grouped by source. Costs $0.02 (x402, USDC).

preview

preview_changes

Latest five breaking/deprecation/security headlines across all sources, to check freshness. Free.

quick

quick_check

Free. Before writing code against a library you may know only from older training data, check whether it changed since that version: verdict, major versions crossed, how many breaking changes, deprecations and security fixes, and the top three breaking headlines. Call upgrade_check (paid) for the full details with evidence.

sources

list_sources

List the 60 APIs/SDKs we track and the package names to query them by. Free.

upgrade

upgrade_check

What changed in a package since the version your code targets: breaking changes, deprecations, security fixes and major versions crossed, with the sentence that triggered each label. Call this before writing code against a library you may know only from older training data. Costs $0.01 (x402, USDC).

Endpoints

URL	Transport	State	Latency	Checked
https://changefeed.anthonyzilar.workers.dev/mcp	streamable-http	answering	101 ms	0 min ago

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API Change Feed — questions

Answers built from our own checks of this server.

What can API Change Feed do?

It exposes 6 tools, read directly from the server on our last check. Among them: digest, get_changes, list_sources, preview_changes, quick_check, upgrade_check. The full list with descriptions is on this page — we take it from the server itself via tools/list, not from a README. How MCP servers expose tools in the first place →

Is API Change Feed working right now?

We send a real MCP handshake every 15 minutes. Over the last 24 hours 92 of 92 checks got a reply (100.0%), average response time 282 ms. The bar chart above shows every period we have measured.

How do I connect API Change Feed?

Copy the ready config from this page. We generate it for Claude Code, Claude Desktop, Codex, Cursor and VS Code, each in the form that client actually reads. It is a remote server, so there is nothing to install — the client connects to the address.

Does API Change Feed need an API key?

No. API Change Feed completed a full MCP handshake with us as an anonymous client and listed its tools without asking for anything. All 6 of them are readable on this page. This is what we observed, not what the docs claim.

How fast is API Change Feed?

It answers our handshake in 282 ms on average, which is faster than 50% of all working MCP servers we measure. The comparison comes from our own checks across the whole registry, every 15 minutes.