SemverKit MCP Server

by workers-mike-tusa-semverkit Your server? Claim it

answering

SemverKit is answering right now. Last checked 4 min ago. It exposes 5 tools.

Semver parse, compare, npm range checks, max-satisfying and version bumps (node-semver compatible).

Uptime history 19 days of history · worst day 99%

19 days agonow

100.0%

Uptime 24h

91 of 91 checks

Tools

read from the server

109 ms

Response time

average over 24h

open, no key

Access

streamable-http

Nothing serious here today

Today is the operative word: we check SemverKit 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 4 min ago.

Claude Code Claude Desktop Codex Cursor VS Code

run in your terminal

claude mcp add semverkit --transport http https://semverkit.mike-tusa.workers.dev/mcp

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

https://semverkit.mike-tusa.workers.dev/mcp

~/.codex/config.toml

[mcp_servers.semverkit]
url = "https://semverkit.mike-tusa.workers.dev/mcp"

.cursor/mcp.json

{
  "mcpServers": {
    "semverkit": {
      "url": "https://semverkit.mike-tusa.workers.dev/mcp"
    }
  }
}

.vscode/mcp.json

{
  "servers": {
    "semverkit": {
      "type": "http",
      "url": "https://semverkit.mike-tusa.workers.dev/mcp"
    }
  }
}

Available tools 5

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

bump

bump_version

Compute the next version for a release type (major, minor, patch, premajor, preminor, prepatch, prerelease, release), with an optional prerelease id such as alpha, beta or rc, exactly like npm version / semver.inc. Read-only: nothing is published. Same engine as GET /api/bump.

compare

compare_versions

Compare a and b by SemVer precedence (prereleases sort before the release, build metadata ignored). Returns -1, 0 or 1 and the change type from the lower to the higher version (major, minor, patch, premajor, preminor, prepatch, prerelease) exactly like semver.diff. Read-only. Same engine as GET /api/compare.

parse

parse_version

Validate a version against SemVer 2.0.0 and split it into major, minor, patch, prerelease identifiers and build metadata, with isPrerelease/isStable flags. Read-only. Same engine as GET /api/parse.

range

check_range

Does a version satisfy an npm-style range (^, ~, x-ranges, hyphen ranges, comparators, || alternatives)? Returns the answer and the range desugared into plain comparators (e.g. ^0.2.3 → >=0.2.3 <0.3.0-0), with a note when npm's prerelease rule is why it fails. Read-only. Same engine as GET /api/satisfies.

resolve

resolve_versions

Sort 1 to 200 versions by SemVer precedence (duplicates removed, invalid ones listed separately) and, if a range is given, return the matching versions plus maxSatisfying / minSatisfying (what npm would install from that list) and the latest stable version. Read-only. Same engine as GET /api/resolve.

Endpoints

URL	Transport	State	Latency	Checked
https://semverkit.mike-tusa.workers.dev/mcp	streamable-http	answering	102 ms	4 min ago

Alternatives to SemverKit

same job, measured the same way

Semver MCP

by mrfentmen

Semantic version toolkit: parse, compare, sort and range-check versions (npm-style ^ ~ and hyphen

118 installs/wk local only

npm MCP

by alisaitteke

MCP server for npm package management, security analysis, and compatibility checking

56 installs/wk local only

Env

by ryudi84

MCP server for .env file validation, parsing, and comparison.

local only

ContrastKit

by workers-mike-tusa-contrastkit

WCAG color contrast checks, nearest accessible color, CSS color conversion and palette pair checks.

4 tools answering

Ship.com

by atlasgrunch

Compare rates, manage orders, buy labels, schedule pickups, and report on shipping.

answering

npm

by mikusnuz

MCP server for npm package management — publish, version, search, audit, and more

75 installs/wk local only

Hyundai Bluelink / Kia Connect

by mattoddie

Check your Hyundai or Kia's charge, range, locks and location, pre-heat it and manage charging.

local only

GenPark SemVer Dependency Resolver Agent

by alphaparkinc

Semantic Versioning 2.0.0 range matcher and dependency tree resolver for multi-agent toolkits and pl

local only

SemverKit — questions

Answers built from our own checks of this server.

What can SemverKit do?

It exposes 5 tools, read directly from the server on our last check. Among them: bump_version, check_range, compare_versions, parse_version, resolve_versions. 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 SemverKit working right now?

We send a real MCP handshake every 15 minutes. Over the last 24 hours 91 of 91 checks got a reply (100.0%), average response time 109 ms. The bar chart above shows every period we have measured.

How do I connect SemverKit?

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 SemverKit need an API key?

No. SemverKit completed a full MCP handshake with us as an anonymous client and listed its tools without asking for anything. All 5 of them are readable on this page. This is what we observed, not what the docs claim.

How fast is SemverKit?

It answers our handshake in 109 ms on average, which is faster than 91% of all working MCP servers we measure. That puts it in the quick quarter of the ecosystem. The comparison comes from our own checks across the whole registry, every 15 minutes.