Data Processing

CSV File Merger

Merge multiple CSV files into a single file with options for header handling and deduplication

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-merger' \
  -F 'file=@/path/to/csvFiles.ext'

# 2) Call the tool with the returned filePath values
curl -X POST 'https://api.elysiatools.com/en/api/tools/csv-merger' \
  -F 'csvFiles=/path/to/file.ext' \
  -F 'headerHandling=first' \
  -F 'separator=,' \
  -F 'outputFormat=csv' \
  -F 'deduplicate=no'

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-merger

Parameters

Name	Type	Required	Description
csvFiles	fileupload required	Yes	—
headerHandling	select	Yes	—
separator	select	Yes	—
outputFormat	select	Yes	—
deduplicate	select	Yes

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-merger": {
      "name": "csv-merger",
      "description": "Merge multiple CSV files into a single file with options for header handling and deduplication",
      "baseUrl": "https://api.elysiatools.com/mcp/sse?toolId=csv-merger",
      "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-merger",
    "arguments": {
  "csvFiles": "https://example.com/file.ext",
  "headerHandling": "first",
  "separator": ",",
  "outputFormat": "csv",
  "deduplicate": "no"
}
  }
}

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).

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