Data Processing
JSON Flattener
Flatten nested JSON objects into key-value pairs with customizable delimiters and flattening strategies
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-flattener' \
-H 'Content-Type: application/json' \
-d '{"jsonInput":"{\n \"user\": {\n \"name\": \"John\",\n \"details\": {\n \"age\": 30,\n \"city\": \"New York\"\n }\n },\n \"settings\": {\n \"theme\": \"dark\",\n \"notifications\": true\n }\n}","strategy":"nested","delimiter":".","maxDepth":0,"includeArrays":true,"filterNulls":false,"preserveOrder":true,"sortKeys":"none"}'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-flattenerParameters
| Name | Type | Required | Description |
|---|---|---|---|
| jsonInput | textarea | Yes | — |
| strategy | select | Yes | — |
| delimiter | text | No | — |
| maxDepth | number | No | — |
| includeArrays | checkbox | No | — |
| filterNulls |
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-flattener": {
"name": "json-flattener",
"description": "Flatten nested JSON objects into key-value pairs with customizable delimiters and flattening strategies",
"baseUrl": "https://api.elysiatools.com/mcp/sse?toolId=json-flattener",
"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-flattener",
"arguments": {
"jsonInput": "{\n \"user\": {\n \"name\": \"John\",\n \"details\": {\n \"age\": 30,\n \"city\": \"New York\"\n }\n },\n \"settings\": {\n \"theme\": \"dark\",\n \"notifications\": true\n }\n}",
"strategy": "nested",
"delimiter": ".",
"maxDepth": 0,
"includeArrays": true,
"filterNulls": false,
"preserveOrder": true,
"sortKeys": "none"
}
}
}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).