JSON Key Renamer

Batch rename JSON object keys with support for patterns, rules, and transformations. Perfect for API response formatting and data normalization.

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/json-key-renamer' \
  -H 'Content-Type: application/json' \
  -d '{"jsonInput":"{\n  \"firstName\": \"John\",\n  \"lastName\": \"Doe\",\n  \"userAge\": 30,\n  \"emailAddress\": \"[email protected]\",\n  \"profile\": {\n    \"profileImage\": \"avatar.jpg\",\n    \"profileBio\": \"Software Developer\"\n  }\n}","renameMode":"rules","renameRules":"{\n  \"firstName\": \"first_name\",\n  \"lastName\": \"last_name\",\n  \"userAge\": \"age\",\n  \"emailAddress\": \"email\",\n  \"profileImage\": \"avatar\",\n  \"profileBio\": \"bio\"\n}","caseConversion":"none","maxDepth":0,"includeArrays":true,"handleConflicts":"error","preserveOriginal":false}'

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/json-key-renamer

Parameters

Name	Type	Required	Description
jsonInput	textarea	Yes	—
renameMode	select	Yes	—
renameRules	textarea	Yes	—
caseConversion	select	Yes	—
maxDepth	number	No	—
includeArrays	checkbox	No	—
handleConflicts	select	Yes	—
preserveOriginal	checkbox	No	—

Response format

JSON result

JSON

{
  "key": {...},
  "metadata": {
    "key": "value"
  },
  "error": "Error message (optional)",
  "message": "Notification message (optional)"
}

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-json-key-renamer": {
      "name": "json-key-renamer",
      "description": "Batch rename JSON object keys with support for patterns, rules, and transformations. Perfect for API response formatting and data normalization.",
      "baseUrl": "https://api.elysiatools.com/mcp/sse?toolId=json-key-renamer",
      "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": "json-key-renamer",
    "arguments": {
  "jsonInput": "{\n  \"firstName\": \"John\",\n  \"lastName\": \"Doe\",\n  \"userAge\": 30,\n  \"emailAddress\": \"[email protected]\",\n  \"profile\": {\n    \"profileImage\": \"avatar.jpg\",\n    \"profileBio\": \"Software Developer\"\n  }\n}",
  "renameMode": "rules",
  "renameRules": "{\n  \"firstName\": \"first_name\",\n  \"lastName\": \"last_name\",\n  \"userAge\": \"age\",\n  \"emailAddress\": \"email\",\n  \"profileImage\": \"avatar\",\n  \"profileBio\": \"bio\"\n}",
  "caseConversion": "none",
  "maxDepth": 0,
  "includeArrays": true,
  "handleConflicts": "error",
  "preserveOriginal": false
}
  }
}

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]