Json Flatten MCP tool

MCP findutils:json_flatten

Flatten a nested JSON object into a single-level map with dot-separated keys.

Needs an API key. Running a tool needs an API key. Keys are not for sale yet: ask for early access. About API keys

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Arguments

application/json

json

string required

JSON object to flatten.
separator

string optional

Key separator. Defaults to ".". Default ".".
arrayNotation

string optional

How an array index is written: "bracket" gives items[0], "dot" gives items.0. Bracket is the default because it keeps an array index distinct from an object key that happens to be a number. One of bracket · dot. Default "bracket".

Example arguments

Verified

{
  "json": {
    "a": {
      "b": 1
    }
  }
}

claude mcp add findutils --transport http https://mcp.findutils.com/ --header "Authorization: Bearer YOUR_API_KEY"

{
  "mcpServers": {
    "findutils": {
      "url": "https://mcp.findutils.com/",
      "headers": {
        "Authorization": "Bearer YOUR_API_KEY"
      }
    }
  }
}

curl -X POST https://mcp.findutils.com/ \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "jsonrpc": "2.0",
    "id": 1,
    "method": "tools/call",
    "params": {
      "name": "json_flatten",
      "arguments": {
        "json": "{\"a\":{\"b\":1}}"
      }
    }
  }'

Also a REST endpoint

The same tool answers plain HTTP at POST /api/tools/json-flatten/execute.

REST reference

Rate limit: 120 a minute, per IP
Auth: API key
REST id: json-flatten
MCP name: json_flatten
Category: Data
Machine-readable: openapi.json · markdown.md

Arguments

Example arguments

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