Design
Expand 3-digit HEX codes to 6-digit codes (e.g., #FFF to #FFFFFF)
Call this tool from your code in three languages.
curl -X POST 'https://api.elysiatools.com/en/api/tools/color-expander' \
-H 'Content-Type: application/json' \
-d '{"colors":"Enter HEX colors, one per line:\n#FFF\n#000\n#F00\n#0F0\n#00F\n#FF0\n#F0F\n#0FF\nFFFFFF\n000000","format":"uppercase","includeAlreadyExpanded":false}'Send a POST request with your inputs as JSON. File parameters require a separate upload first.
POST https://api.elysiatools.com/en/api/tools/color-expander| Name | Type | Required | Description |
|---|---|---|---|
| colors | textarea | Yes | — |
| format | select | Yes | — |
| includeAlreadyExpanded | checkbox | No | Show colors that are already 6 digits with reasons |
Text result
{
"result": "Processed text content",
"error": "Error message (optional)",
"message": "Notification message (optional)",
"metadata": {
"key": "value"
}
}Add this tool to your Model Context Protocol server so AI agents can list and call it.
Add this block to your MCP client configuration:
{
"mcpServers": {
"elysiatools-color-expander": {
"name": "color-expander",
"description": "Expand 3-digit HEX codes to 6-digit codes (e.g., #FFF to #FFFFFF)",
"baseUrl": "https://api.elysiatools.com/mcp/sse?toolId=color-expander",
"command": "",
"args": [],
"env": {},
"isActive": true,
"type": "sse"
}
}
}After connecting to the SSE endpoint, list the exposed tools:
{
"jsonrpc": "2.0",
"id": 1,
"method": "tools/list"
}Invoke the tool by its id, passing arguments built from its parameters:
{
"jsonrpc": "2.0",
"id": 2,
"method": "tools/call",
"params": {
"name": "color-expander",
"arguments": {
"colors": "Enter HEX colors, one per line:\n#FFF\n#000\n#F00\n#0F0\n#00F\n#FF0\n#F0F\n#0FF\nFFFFFF\n000000",
"format": "uppercase",
"includeAlreadyExpanded": false
}
}
}Questions or issues? Contact [email protected]