SemVer compare

semver-compare · version 1.0.0 · Versions & config · free, no key needed

Compare two strict Semantic Versions by precedence.

Use when you need to: semver compare · compare semver · cmp semantic versions.

Supported

• semver compare
• compare semver
• cmp semantic versions

Not supported

• loose versions
• descending option
• npm lookup

Behavior

• Use installed semver 7.8.5 with loose: false. Same strict regex as baseline example-tests / semver-sort.
• result is semver.compare(a,b): -1, 0, or 1. Build metadata does not affect precedence.
• Reject v-prefix, spaces, leading zeros, latest, empty.

Input

• a (string, required): min length 1; max length 256
• b (string, required): min length 1; max length 256

Output

• result (one of -1, 0, 1, required)

Limits

• max version length: 256

Example

Request input:

{
  "a": "1.0.0-alpha",
  "b": "1.0.0"
}

Response:

{
  "result": {
    "result": -1
  }
}

How to call it

MCP

Connect https://computefirst.net/mcp (setup), then call execute with:

{
  "id": "semver-compare",
  "version": "1.0.0",
  "input": {
    "a": "1.0.0-alpha",
    "b": "1.0.0"
  }
}

HTTP (no key)

curl -X POST https://computefirst.net/v1/tools/semver-compare/versions/1.0.0/execute \
  -H "Content-Type: application/json" \
  -d '{"a":"1.0.0-alpha","b":"1.0.0"}'

The machine-readable contract is at /v1/tools/semver-compare/versions/1.0.0.

CLI

node cli.mjs run semver-compare 1.0.0 --input input.json --base-url https://computefirst.net

Get the client at /clients/cli/.

Related tools

• SemVer sort: Sort strict valid Semantic Versions in ascending precedence order.
• SemVer filter: Filter strict versions that satisfy a range, preserving original order and strings.
• SemVer satisfies: Test whether a strict version satisfies a semver range.
• .env merge: Overlay two dotenv-subset documents, replacing left values and appending right-only keys.
• .env parse: Parse a strict dotenv-subset document into ordered key/value entries.
• .env stringify: Serialize unique env key/value entries to a canonical dotenv-subset document.