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Regex Builder from Natural Language
x402
Regex Builder from Natural Language is a paid API for AI agents from dev-5090-box.tailfb4c1f.ts.net, paid per call via x402, $0.02/call, status unknown (last checked 2026-10-12).
Converts a plain-English description of a pattern into a regex and a matching test string
Price / call$0.02
Success—
StatusUnknown
How this service works
Build a regex from a natural-language description. Returns just the regex + one test string.
Output
Returns a regular expression pattern string and a single example test string that the regex matches, with no extra explanation or prose.
Example use cases
Email validation regex generation
“I need a regex that matches valid email addresses like user@example.com — can you generate one along with a test string that proves it works?”
Date format pattern builder
“Write me a regex that matches dates in YYYY-MM-DD format, and include a sample date string I can use to test it.”
Password rule enforcement regex
“Generate a regex for passwords that require at least 8 characters, one uppercase letter, one digit, and one special character — and give me an example string that passes it.”
Technical details
Endpoint
POSThttps://dev-5090-box.tailfb4c1f.ts.net/v1/regex-build?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a quick, ready-to-use regex generated directly from a plain-English description without having to write or debug patterns manually. It's ideal for developers prototyping validation logic, agents building dynamic input sanitizers, or tools that need to generate and immediately test a regex in one round-trip call. Prefer it over general-purpose chat endpoints when you want a minimal, structured response (just the regex + test string) rather than a verbose explanation.
Side effects
- Ambiguous natural language description may produce an incorrect or overly broad regex
- Very complex multi-rule patterns may result in a regex that partially mismatches edge cases
- The test string returned may not cover all branches of the regex
- Model may occasionally hallucinate invalid regex syntax
- Upstream LLM unavailable or GPU resource exhausted returns a 5xx error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| usage | object | |
| choices | array |
Tags
x402
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