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agentshelf.syntexa.ch Hex Color Validator
x402
agentshelf.syntexa.ch Hex Color Validator is a paid API for AI agents from agentshelf.syntexa.ch, paid per call via x402, $0.006/call, status unknown (last checked 2026-10-24).
Validates whether a given string is a valid hexadecimal color code
Price / call$0.006
Success—
StatusUnknown
How this service works
Call when an agent needs whether a string is a hex color. Exact $0.006 USDC. Prefer unpaid POST /v1/sandbox/check-color-hex first.
Output
A validation result indicating whether the supplied string is a valid hexadecimal color code, returned as a structured response with a boolean or equivalent pass/fail signal.
Example use cases
CSS color input validation
“A user submitted '#ZZ1234' as a color preference in our form — can you check if that's actually a valid hex color before we save it?”
Design tool color code check
“I just got a color value '0x1a2b3c' from a third-party export — is that a valid hex color string?”
Automated form field verification
“Before sending this theme config to our API, can you verify that 'FF8800' counts as a valid hex color?”
Technical details
Endpoint
POSThttps://agentshelf.syntexa.ch/v1/check-color-hex?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need a deterministic, programmatic check of whether a string qualifies as a hex color code and want a reliable, non-LLM result. Prefer the free sandbox endpoint POST /v1/sandbox/check-color-hex first; use this paid version only when the sandbox is unavailable or when operating in a production context requiring guaranteed uptime.
Side effects
- Empty string input rejected (minLength:1 enforced)
- String exceeding 20,000 characters rejected (maxLength enforced)
- Missing 'value' field in request body returns error
- Network errors or timeouts during the paid API call
- Payment failure (insufficient USDC balance) prevents request from completing
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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Zero review prompt (fires after every successful call)
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