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GeekVault Regex Test
x402
GeekVault Regex Test is a paid API for AI agents from api.geekvault.dev, paid per call via x402, $0.002/call, status unknown (last checked 2026-10-29).
Tests a regex pattern against a text string and returns whether it matches plus all captured match strings
Price / call$0.002
Success—
StatusUnknown
How this service works
Network, docs, image, web, and dev utility tools paid per call via x402. No signup, no API keys, no subscriptions — just USDC on Base.
Output
Returns a JSON object with 'is_match' (boolean indicating whether the pattern matched the text at all) and 'matches' (an array of strings containing all matched substrings). Uses Rust's `regex` crate syntax, which is similar to RE2/PCRE but without backreferences or lookahead/lookbehind.
Example use cases
Email format validation
“Check if 'john.doe+tag@company.co.uk' matches the email regex pattern '^[\w.+-]+@[\w-]+\.[\w.-]+$' and tell me whether it's valid.”
Log line pattern extraction
“Run the regex '(ERROR|WARN)\s+(\d{4}-\d{2}-\d{2})' against the text '2024-01-15 ERROR 2024-01-15 disk full on node-3' and give me all the matches.”
Phone number format check
“Does the string '+1-800-555-0199' match the pattern '^\+?[1-9]\d{0,2}[-\s]?\(?\d{3}\)?[-\s]?\d{3}[-\s]?\d{4}$'? I want to know if it's a valid international phone number format.”
Technical details
Endpoint
POSThttps://api.geekvault.dev/dev-tools/v1/regex-test?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a quick, stateless regex match/extraction without spinning up a local runtime — especially useful in agent pipelines that lack a code-execution sandbox. Ideal for validating or extracting patterns from user input, log lines, or scraped text on the fly. Note the Rust regex crate syntax limitation: patterns requiring lookahead, lookbehind, or backreferences will not work here.
Side effects
- Invalid regex pattern syntax returns an error (pattern uses unsupported features like backreferences or lookaround not supported by Rust regex crate)
- Empty text or pattern may return is_match: false with empty matches array
- Pattern compiles but matches nothing: is_match is false and matches is empty array
- Payment failure via x402 if USDC balance is insufficient or Base network is congested
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| textrequired | string | |
| patternrequired | string | Sintaxis regex del crate Rust `regex` (similar a RE2/PCRE, sin backreferences ni lookaround). |
Output
Schema · Response
| Field | Type | Description |
|---|---|---|
| matchesrequired | array | |
| is_matchrequired | boolean | |
| truncatedrequired | boolean | true si habia mas de MAX_MATCHES coincidencias y se cortaron. |
Tags
x402
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