Data Processing

Find Key

Find the first matching key using lodash _.findKey

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Quick start

Call this tool from your code in three languages.

cURL

curl -X POST 'https://api.elysiatools.com/en/api/tools/find-key' \
  -H 'Content-Type: application/json' \
  -d '{"objectInput":"{\"a\":{\"active\":false},\"b\":{\"active\":true}}","predicateType":"property","predicateProperty":"active","matchPath":"active","matchValue":"true","matchObject":"{\"active\":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/find-key

Parameters

Name	Type	Required	Description
objectInput	textarea	Yes	Enter a JSON object
predicateType	select	No	—
predicateProperty	text	No	Truthy property name when using property predicate
matchPath	text	No	Property path for matchesProperty
matchValue	textarea	No	JSON value to match

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-find-key": {
      "name": "find-key",
      "description": "Find the first matching key using lodash _.findKey",
      "baseUrl": "https://api.elysiatools.com/mcp/sse?toolId=find-key",
      "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": "find-key",
    "arguments": {
  "objectInput": "{\"a\":{\"active\":false},\"b\":{\"active\":true}}",
  "predicateType": "property",
  "predicateProperty": "active",
  "matchPath": "active",
  "matchValue": "true",
  "matchObject": "{\"active\":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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