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x402 Utils – Regex Match & Replace (RE2)
x402
x402 Utils – Regex Match & Replace (RE2) is a paid API for AI agents from qcb7fnxsbd7fbhj4.68r.lambda-web.us-east-1.on.aws, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-29).
Runs a RE2 regular expression on a text, returning all matches with positions and capture groups, plus an optional replacement result.
Price / call$0.001
Success—
StatusUnknown
How this service works
Run a regular expression on a text: every match with its position and capture groups (named too), and the text with a replacement applied. RE2 syntax, which runs in linear time (no lookaround or backreferences).
Output
Returns a JSON object with: `matched` (boolean), `count` (number of matches), `matches` array (each with `index`, `match` string, `groups` array of positional captures, `named` map of named captures), and `replaced` (the full text with the replacement applied, if a replacement was provided).
Example use cases
Extract all email addresses from text
“Pull out every email address from this paragraph using a regex — pattern `[\w.+-]+@[\w-]+\.[\w.]+` — and tell me how many there are and where each one appears: 'Contact alice@example.com or support@company.org for help.'”
Find and reformat dates in a document
“I have this text: 'Invoice date: 2025-07-14, due: 2025-08-01.' Use the pattern `(\d{4})-(\d{2})-(\d{2})` with named groups year, month, day and replace each date with the format $3/$2/$1 so it reads European style.”
Validate log lines with capture groups
“Check if any lines in this server log match the pattern `^ERROR (\d{3}): (.+)$` with multiline mode on, and give me the status code and message from each match: 'INFO 200: OK\nERROR 503: Service Unavailable\nERROR 404: Not Found'”
Technical details
Endpoint
POSThttps://qcb7fnxsbd7fbhj4.68r.lambda-web.us-east-1.on.aws/v1/regex?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need server-side, guaranteed linear-time regex execution (RE2) without risk of catastrophic backtracking, when you need both match extraction (positions + groups) and replacement in a single call, or when your runtime doesn't have a regex engine available. Prefer over client-side solutions when working with untrusted patterns that could cause ReDoS vulnerabilities, or when you need named capture groups and positional indices reliably returned as structured JSON.
Side effects
- Invalid RE2 pattern syntax returns an error — RE2 does not support lookahead, lookbehind, or backreferences
- Text exceeding 1 MB will be rejected
- Pattern exceeding 2000 characters will be rejected
- Invalid flag characters (anything other than i, m, s) will cause an error
- Payment failure or missing x402 payment header returns 402 status
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| text | string | the text (up to 1 MB) |
| flags | string | any of i (ignore case), m (multiline), s (dot matches newline) |
| pattern | string | the pattern (up to 2000 characters) |
| replacement | string | optional replacement, $1 for groups |
Output
Schema · Response
{
"type": "json",
"example": {
"count": 2,
"matched": true,
"matches": [
{
"index": 5,
"match": "2026-10",
"named": {
"year": "2026"
},
"groups": [
"2026",
"10"
]
}
],
"replaced": "from 10/2026 to 01/2027"
}
}Tags
x402
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