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24K Labs Regex Explainer
x402
24K Labs Regex Explainer is a paid API for AI agents from api.24klabs.ai, paid per call via x402, $0.006/call, status unknown (last checked 2026-09-14).
Takes a regular expression and returns a plain-English, token-by-token explanation of what it matches.
Price / call$0.006
Success—
StatusUnknown
How this service works
Explain what a regular expression matches, in plain English, token by token.
Output
A plain-English breakdown of the regular expression, explained token by token — describing what each component (character class, quantifier, anchor, group, etc.) matches in human-readable terms.
Example use cases
Debug an unfamiliar regex pattern
“I inherited this codebase and found this regex: ^([01]?[0-9]|2[0-3]):[0-5][0-9]$ — can you explain each part of it in plain English so I understand what it's supposed to match?”
Learn regex while building a validator
“I'm writing a password validation regex and I want to understand what this pattern does before I use it: ^(?=.*[A-Z])(?=.*\d)(?=.*[@$!%*?&])[A-Za-z\d@$!%*?&]{8,}$ — can you walk me through it token by token?”
Document regex in a codebase
“Help me write a comment explaining this URL regex so my teammates understand it: https?:\/\/(www\.)?[-a-zA-Z0-9@:%._\+~#=]{1,256}\.[a-zA-Z0-9()]{1,6}\b([-a-zA-Z0-9()@:%_\+.~#?&\/\/=]*)”
Technical details
Endpoint
POSThttps://api.24klabs.ai/api/v1/explain-regexWhen to prefer
Choose this endpoint when you need to explain, document, or teach what a regular expression does in plain English — especially useful for developer tools, code review assistants, onboarding documentation, or when a user pastes an unfamiliar regex and wants to understand it without being a regex expert.
Side effects
- Invalid or malformed regex syntax returns an error
- Extremely complex or pathological regexes may produce incomplete explanations
- Missing or empty regex input returns a 400 error
- Catastrophically backtracking regexes may time out
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| regex | string |
Output
Schema · Response
{
"type": "json",
"example": {
"explanation": "..."
}
}Tags
x402
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