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validar-semver MCP Server

answering

validar-semver is answering right now. Last checked 14 min ago. It exposes 1 tools. Last commit 11 Aug 2026.

Resolves real semver range satisfaction (^1.2.3, ~2.0) against a version. Paid via x402/USDC.

Uptime history 21 days of history · worst day 99%
21 days agonow
100.0%
Uptime 24h
91 of 91 checks
1
Tools
read from the server
455 ms
Response time
average over 24h
0
Stars
last commit 11 Aug 2026

What the code does

We read the source, 13 h ago · tools taken from the live server · rules 3dff92dd89df

Capabilities

What this server is able to do. For an MCP server this is often the job itself — a terminal server runs commands because that is what it is for. Listed so you know what you are plugging in, not as an accusation.

Runs an external command worker-configuration.d.ts:3387
    exec(input?: string | URLPatternInit, baseURL?: string): URLPatternResult | null;

Is this your server and something here is wrong? Tell us — corrections are free and do not require a plan.

This code can reach further than it looks

We found places where it runs commands, builds paths or queries from values it is given. None of that is a flaw by itself — it becomes one when the code changes, and code changes quietly between releases. We re-read it on every one.

Three servers free · no card

Connect this server

Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 14 min ago.

run in your terminal
claude mcp add validar-semver --transport http https://validar-semver.encodari.workers.dev/mcp
~/Library/Application Support/Claude/claude_desktop_config.json
{
  "mcpServers": {
    "validar-semver": {
      "url": "https://validar-semver.encodari.workers.dev/mcp"
    }
  }
}
~/.codex/config.toml
[mcp_servers.validar-semver]
url = "https://validar-semver.encodari.workers.dev/mcp"
.cursor/mcp.json
{
  "mcpServers": {
    "validar-semver": {
      "url": "https://validar-semver.encodari.workers.dev/mcp"
    }
  }
}
.vscode/mcp.json
{
  "mcpServers": {
    "validar-semver": {
      "url": "https://validar-semver.encodari.workers.dev/mcp"
    }
  }
}

Available tools 1

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

validate
validate_semver
Resolves real semver range satisfaction (e.g. "^1.2.3", "~2.0", "2.x", ">=1.0.0 <2.0.0") against a version, using the same semver engine npm uses (the "semver" package), not a model guess about what should match. Costs $0.01 USDC (Base) per call.

Endpoints

URLTransportStateLatencyChecked
https://validar-semver.encodari.workers.dev/mcp streamable-http answering 772 ms 14 min ago

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validar-semver — questions

Answers built from our own checks of this server.

What can validar-semver do?
It exposes 1 tools, read directly from the server on our last check. Among them: validate_semver. 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 validar-semver 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 455 ms. The bar chart above shows every period we have measured.
How do I connect validar-semver?
Copy the ready config from this page — we generate it for Claude Code, Claude Desktop, Codex, Cursor and VS Code, each with the file path that client actually reads. It is a remote server, so there is nothing to install — the client connects to the address.
Does validar-semver need an API key?
No. validar-semver completed a full MCP handshake with us as an anonymous client and listed its tools without asking for anything. All 1 of them are readable on this page. This is what we observed, not what the docs claim.
How fast is validar-semver?
It answers our handshake in 455 ms on average, which is faster than 39% of all working MCP servers we measure. The comparison comes from our own checks across the whole registry, every 15 minutes.
Is validar-semver open source?
Yes — it is published under the MIT licence, written in TypeScript and 0 stars on GitHub. The source link is on this page, so you can read exactly what it does with your data before you connect it.