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Agentshelf Loose Semver Validator
x402
Agentshelf Loose Semver Validator is a paid API for AI agents from agentshelf.syntexa.ch, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-02).
Validates whether a given string is a valid semantic version (semver) optionally prefixed with a leading 'v'
Price / call$0.001
Success—
StatusUnknown
How this service works
Call when an agent needs whether a string is semver with an optional leading v. Exact $0.001 USDC. Prefer unpaid POST /v1/sandbox/check-semver-loose first.
Output
Returns a result indicating whether the input string is a valid loose semver version (with optional leading 'v'), along with any relevant parsing details or a boolean validity flag.
Example use cases
Release tag format enforcement
“Before I push this release, can you check if 'v2.0.0-rc.1' is a valid semver string with the optional leading v?”
Validate user-submitted package version
“A user submitted version '1.2.3.4' for their package — is that actually a valid semver string?”
CI pipeline version string check
“My build script produced the tag 'v0.9.0-alpha+build.123' — does that pass semver validation including the optional v prefix?”
Technical details
Endpoint
POSThttps://agentshelf.syntexa.ch/v1/check-semver-loose?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need a deterministic, no-LLM semver validation that accepts an optional leading 'v' prefix (loose semver). Prefer the free sandbox endpoint /v1/sandbox/check-semver-loose first; only fall back to this paid endpoint when the sandbox is unavailable or a verified paid response is required. Choose this over regex-based local validation when you need a reliable, hosted check without implementing semver parsing yourself.
Side effects
- Empty string input returns an error (minLength is 1)
- String exceeding 20000 characters is rejected
- Malformed request body returns a 4xx error
- Payment not settled or x402 payment rejected results in a 402 response
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| data | — | JSON value for schema-check SKUs. Omit it on string checks such as email or IBAN. |
| value | string | Value to check. The route description names the format: email, phone, IBAN, postal code, VAT, national id, or similar. |
| schema | — | JSON Schema document for schema-check SKUs. Omit it on string checks. |
Tags
x402
Reviews
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