Development

Regex Benchmark

Compare performance of different regex patterns, identify bottlenecks, and detect degenerate cases

json· JSON resultOpen tool

Quick start

Call this tool from your code in three languages.

cURL

curl -X POST 'https://api.elysiatools.com/en/api/tools/regex-benchmark' \
  -H 'Content-Type: application/json' \
  -d '{"regexList":".*\n[a-z]+\n\\d+","testInput":"hello world\n12345\nabc","regexFlags":"Flags to apply to all patterns (e.g., gi, m, i)","iterations":1000,"warmupRuns":100,"targetDialect":"javascript","includeDegenerate":true}'

API reference

Send a POST request with your inputs as JSON. File parameters require a separate upload first.

Endpoint

HTTP

POST https://api.elysiatools.com/en/api/tools/regex-benchmark

Parameters

Name	Type	Required	Description
regexList	textarea	Yes	—
testInput	textarea	Yes	—
regexFlags	text	No	—
iterations	number	No	—
warmupRuns	number	No	—
targetDialect

MCP integration

Add this tool to your Model Context Protocol server so AI agents can list and call it.

Server configuration

Add this block to your MCP client configuration:

mcp.json

{
  "mcpServers": {
    "elysiatools-regex-benchmark": {
      "name": "regex-benchmark",
      "description": "Compare performance of different regex patterns, identify bottlenecks, and detect degenerate cases",
      "baseUrl": "https://api.elysiatools.com/mcp/sse?toolId=regex-benchmark",
      "command": "",
      "args": [],
      "env": {},
      "isActive": true,
      "type": "sse"
    }
  }
}

List available tools

After connecting to the SSE endpoint, list the exposed tools:

tools/list

{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/list"
}

Call this tool

Invoke the tool by its id, passing arguments built from its parameters:

tools/call

{
  "jsonrpc": "2.0",
  "id": 2,
  "method": "tools/call",
  "params": {
    "name": "regex-benchmark",
    "arguments": {
  "regexList": ".*\n[a-z]+\n\\d+",
  "testInput": "hello world\n12345\nabc",
  "regexFlags": "Flags to apply to all patterns (e.g., gi, m, i)",
  "iterations": 1000,
  "warmupRuns": 100,
  "targetDialect": "javascript",
  "includeDegenerate": true
}
  }
}

Chain multiple tools in one session with a comma-separated toolId list, e.g. /mcp/sse?toolId=png-to-webp,jpg-to-webp,gif-to-webp (max 20).

Questions or issues? Contact [email protected]

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