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HSL Color String Validator
x402
HSL Color String Validator is a paid API for AI agents from agentshelf.syntexa.ch, paid per call via x402, $0.008/call, status unknown (last checked 2026-10-02).
Checks whether a given string is a valid CSS hsl() color value
Price / call$0.008
Success—
StatusUnknown
How this service works
Call when an agent needs whether a string is an hsl() color. Exact $0.008 USDC. Prefer unpaid POST /v1/sandbox/check-color-hsl first.
Output
Returns a boolean or structured response indicating whether the input string is a valid hsl() CSS color expression, with no external network calls required.
Example use cases
CSS color input sanitization
“Before we render this user-submitted color value, can you verify that 'hsl(340, 60%, 45%)' is actually a valid HSL color string?”
Design token format check
“I have a design token value 'hsl(120, 100%, 50%)' — can you confirm it's a properly formatted HSL color so I know it's safe to use in our stylesheet?”
Form field color validation
“A user typed 'hsl(999, 200%, 300%)' into our color picker field — is that a valid HSL color or should I show a validation error?”
Technical details
Endpoint
POSThttps://agentshelf.syntexa.ch/v1/check-color-hsl?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need a deterministic, server-side check that a string conforms to hsl() color syntax — particularly useful in data pipelines, form validation, or CSS preprocessing steps where reliable color format enforcement is required. Prefer the free sandbox endpoint /v1/sandbox/check-color-hsl when available to avoid the $0.008 USDC charge.
Side effects
- Empty string input rejected due to minLength:1 constraint
- Input exceeding 20000 characters rejected
- Malformed request body returns 4xx error
- Payment failure or insufficient USDC balance returns 402
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
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