SQL Explain Plan Visualizer

Parse EXPLAIN / EXPLAIN ANALYZE output (PostgreSQL/MySQL/SQLite) into a cost tree, flag estimated-vs-actual row divergence, and suggest indexes

html· HTML resultOpen tool

Quick start

Call this tool from your code in three languages.

cURL

curl -X POST 'https://api.elysiatools.com/en/api/tools/sql-explain-plan-visualizer' \
  -H 'Content-Type: application/json' \
  -d '{"explainOutput":"[\n  {\n    \"Plan\": {\n      \"Node Type\": \"Seq Scan\",\n      \"Relation Name\": \"users\",\n      \"Alias\": \"users\",\n      \"Filter\": \"((email)::text = '\''a@b.com'\'')\",\n      \"Plan Rows\": 1000,\n      \"Plan Width\": 142,\n      \"Total Cost\": 1541.00,\n      \"Actual Rows\": 95000,\n      \"Actual Loops\": 1,\n      \"Actual Startup Time\": 0.1,\n      \"Actual Total Time\": 12.4\n    }\n  }\n]","dialect":"auto","sql":"SELECT * FROM users WHERE lower(email) = '\''[email protected]'\''","maxDepth":20}'

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/sql-explain-plan-visualizer

Parameters

Name	Type	Required	Description
explainOutput	textarea	Yes	—
dialect	select	No	—
sql	textarea	No	—
maxDepth	number	No	—

Response format

HTML result

JSON

{
  "result": "<div>Processed HTML content</div>",
  "error": "Error message (optional)",
  "message": "Notification message (optional)",
  "metadata": {
    "key": "value"
  }
}

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-sql-explain-plan-visualizer": {
      "name": "sql-explain-plan-visualizer",
      "description": "Parse EXPLAIN / EXPLAIN ANALYZE output (PostgreSQL/MySQL/SQLite) into a cost tree, flag estimated-vs-actual row divergence, and suggest indexes",
      "baseUrl": "https://api.elysiatools.com/mcp/sse?toolId=sql-explain-plan-visualizer",
      "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": "sql-explain-plan-visualizer",
    "arguments": {
  "explainOutput": "[\n  {\n    \"Plan\": {\n      \"Node Type\": \"Seq Scan\",\n      \"Relation Name\": \"users\",\n      \"Alias\": \"users\",\n      \"Filter\": \"((email)::text = '[email protected]')\",\n      \"Plan Rows\": 1000,\n      \"Plan Width\": 142,\n      \"Total Cost\": 1541.00,\n      \"Actual Rows\": 95000,\n      \"Actual Loops\": 1,\n      \"Actual Startup Time\": 0.1,\n      \"Actual Total Time\": 12.4\n    }\n  }\n]",
  "dialect": "auto",
  "sql": "SELECT * FROM users WHERE lower(email) = '[email protected]'",
  "maxDepth": 20
}
  }
}

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]