agent402.tools Regex Match

x402

agent402.tools Regex Match is a paid API for AI agents from agent402.tools, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-14).

Runs a JavaScript-syntax regular expression against provided text and returns up to 100 matches with their indices and capture groups.

Price / call$0.001

Seller volume →—

Success—

StatusUnknown

How this service works

Run a regular expression against text. Returns up to 100 matches with index and capture groups. Pattern ≤ 200 chars, text ≤ 10KB.

Output

An array of up to 100 match objects, each containing the matched string, its start index within the text, and any named or numbered capture group values extracted by the pattern.

Example use cases

Example prompt

“Find all email addresses in this text using the pattern `[\w.+-]+@[\w-]+\.[\w.]+` with global and case-insensitive flags: 'Contact us at support@example.com or sales@ACME.org for more info.'”

Technical details

Endpoint

POSThttps://agent402.tools/api/regex

When to prefer

Use this endpoint when you need structured regex match results with indices and capture groups from arbitrary text, especially in an agent pipeline where downstream steps depend on positional or grouped match data. Prefer this over client-side regex when the agent environment lacks regex support or when you need a consistent, sandboxed execution environment.

Side effects

Pattern exceeds 200 character limit — returns validation error
Text exceeds 10KB limit — returns payload-too-large error
Invalid regex syntax (JS-flavor) — returns pattern parse error
No matches found — returns empty array
Invalid flags string — returns flag validation error

Input

Schema · Request body

Field	Type	Description
text	string	Text to search (max 10KB)
flags	string	Regex flags, e.g. gi (default g)
pattern	string	Regex pattern (JS syntax, max 200 chars)

Output

Schema · Response

{
  "type": "json",
  "example": {
    "matches": [
      {
        "index": 11,
        "match": "a@b.com",
        "groups": [
          "a",
          "b.com"
        ]
      }
    ],
    "matchCount": 1
  }
}

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How this service works

Run a regular expression against text. Returns up to 100 matches with index and capture groups. Pattern ≤ 200 chars, text ≤ 10KB.

Output

An array of up to 100 match objects, each containing the matched string, its start index within the text, and any named or numbered capture group values extracted by the pattern.

Technical details

Endpoint

POSThttps://agent402.tools/api/regex

When to prefer

Side effects

Pattern exceeds 200 character limit — returns validation error
Text exceeds 10KB limit — returns payload-too-large error
Invalid regex syntax (JS-flavor) — returns pattern parse error
No matches found — returns empty array
Invalid flags string — returns flag validation error

Input

Schema · Request body

Field	Type	Description
text	string	Text to search (max 10KB)
flags	string	Regex flags, e.g. gi (default g)
pattern	string	Regex pattern (JS syntax, max 200 chars)

Output

Schema · Response

{
  "type": "json",
  "example": {
    "matches": [
      {
        "index": 11,
        "match": "a@b.com",
        "groups": [
          "a",
          "b.com"
        ]
      }
    ],
    "matchCount": 1
  }
}