Json Unflatten MCP tool

MCP findutils:json_unflatten

Unflatten a flat key map back into nested JSON. Understands both array notations json_flatten emits: items[0].name and items.0.name. A numeric segment rebuilds an array rather than an object.

Try it

Arguments

application/json

json

string required

Flat JSON object to expand.
separator

string optional

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

string optional

Which notation the flat keys use, matching json_flatten. In "dot", a bare numeric segment such as items.0 rebuilds an array; in "bracket" only items[0] does, so an object key that is literally "0" survives. One of bracket · dot. Default "bracket".

Example arguments

Verified

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

claude mcp add findutils --transport http https://mcp.findutils.com/

{
  "mcpServers": {
    "findutils": {
      "url": "https://mcp.findutils.com/"
    }
  }
}

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

Also a REST endpoint

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

REST reference

Rate limit: 120 a minute, per IP
Auth: None
REST id: json-unflatten
MCP name: json_unflatten
Category: Data
Machine-readable: openapi.json · markdown.md

Arguments

Example arguments

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