Data Processing

CSV / Excel Diff Tool

Compare two CSV or XLSX datasets and export a PDF report with row, column, and cell-level differences

file· File resultOpen tool

Quick start

Call this tool from your code in three languages.

cURL

# 1) Upload each file first → returns { filePath }
curl -X POST 'https://api.elysiatools.com/upload/csv-excel-diff-tool' \
  -F 'file=@/path/to/leftFile.ext'
curl -X POST 'https://api.elysiatools.com/upload/csv-excel-diff-tool' \
  -F 'file=@/path/to/rightFile.ext'

# 2) Call the tool with the returned filePath values
curl -X POST 'https://api.elysiatools.com/en/api/tools/csv-excel-diff-tool' \
  -F 'leftInput=id,sku,price,status
1,A-100,29.99,active
2,A-200,45.00,active' \
  -F 'leftFile=/path/to/file.ext' \
  -F 'leftSheetName=Sheet1' \
  -F 'rightInput=id,sku,price,status
1,A-100,29.99,active
2,A-200,49.00,active
3,A-300,15.00,draft' \
  -F 'rightFile=/path/to/file.ext' \
  -F 'rightSheetName=Sheet1' \
  -F 'keyColumns=id' \
  -F 'compareMode=all' \
  -F 'reportTitle=Pricing Snapshot Diff'

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/csv-excel-diff-tool

Parameters

Name	Type	Required	Description
leftInput	textarea	No	—
leftFile	fileupload required	No	—
leftSheetName	text	No	—
rightInput	textarea	No	—
rightFile	fileupload required	No	—
rightSheetName	text	No	—
keyColumns	text	No	—
compareMode	select	No	—
reportTitle	text	No	—

File-type parameters must be uploaded first via POST /upload/csv-excel-diff-tool, then the returned filePath is passed to the corresponding file field.

Response format

File result

JSON

{
  "filePath": "/public/processing/randomid.ext",
  "fileName": "output.ext",
  "contentType": "application/octet-stream",
  "size": 1024,
  "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-csv-excel-diff-tool": {
      "name": "csv-excel-diff-tool",
      "description": "Compare two CSV or XLSX datasets and export a PDF report with row, column, and cell-level differences",
      "baseUrl": "https://api.elysiatools.com/mcp/sse?toolId=csv-excel-diff-tool",
      "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": "csv-excel-diff-tool",
    "arguments": {
  "leftInput": "id,sku,price,status\n1,A-100,29.99,active\n2,A-200,45.00,active",
  "leftFile": "https://example.com/file.ext",
  "leftSheetName": "Sheet1",
  "rightInput": "id,sku,price,status\n1,A-100,29.99,active\n2,A-200,49.00,active\n3,A-300,15.00,draft",
  "rightFile": "https://example.com/file.ext",
  "rightSheetName": "Sheet1",
  "keyColumns": "id",
  "compareMode": "all",
  "reportTitle": "Pricing Snapshot Diff"
}
  }
}

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).

File parameters accept a public file URL only (https://…). Local paths, data: URIs, and Base64 strings are not supported.

Questions or issues? Contact [email protected]