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Vextorium Regex Tester
x402
Vextorium Regex Tester is a paid API for AI agents from api.vextorium.com, paid per call via x402, $0.002/call, status unknown (last checked 2026-10-16).
Test a regular expression against text, returning all matches with positions, capture groups, named groups, and optional substitution result
Price / call$0.002
Success—
StatusUnknown
How this service works
Test a regular expression against a text: every match with position, groups and named groups, plus the result of a substitution if you pass a replacement. Flags i, m, s, x. Time-limited, safe against catastrophic backtracking.
Output
Returns whether the pattern matched, total number of matches, each match's text and start/end positions, positional capture groups, named capture groups, defined group count, group names list, and the full substitution result string if a replacement was provided.
Example use cases
Email extraction from raw text
“Run the regex `(?P<user>[\w.+-]+)@(?P<dom>[\w.-]+\.[a-z]{2,})` against this text: 'Reach us at support@acme.com or sales@acme.co.uk' — give me all matches with their named groups and positions.”
Log line parsing with substitution
“Test the pattern `ERROR (\d{3}): (.+)` against my log snippet 'ERROR 404: Page not found\nERROR 500: Internal error' using multiline flag, and replace each match with 'FAULT \1 — \2'.”
Validate date format in a string
“Check whether the pattern `^\d{4}-\d{2}-\d{2}$` matches the string '2024-07-15', and tell me if it fully matches, what the groups are, and what position the match starts at.”
Technical details
Endpoint
POSThttps://api.vextorium.com/regex-probar-pago?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need server-side, safe regex execution with full match detail (positions, capture groups, named groups) without running untrusted patterns locally. It is especially useful when you want substitution results alongside match metadata in a single call, need protection against ReDoS via server-side time limits, or are working in an environment where executing arbitrary regex locally is undesirable.
Side effects
- Invalid regex pattern returns an error (catastrophic backtracking is time-limited and killed safely)
- Missing required fields 'patron' or 'texto' returns a validation error
- Unsupported flag characters outside i, m, s, x cause an error
- Payment of 0.002 USDC not provided or rejected blocks the request
- Very large input text may be truncated or rejected
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| flags | string | |
| texto | string | |
| patron | string | |
| reemplazo | string | |
| max_coincidencias | integer |
Tags
x402
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