Development
Connect to any WebSocket (ws:// or wss://) endpoint from your browser, send and receive messages, and inspect open/close/error events with codes — ideal for debugging real-time APIs and sockets
Call this tool from your code in three languages.
curl -X POST 'https://api.elysiatools.com/en/api/tools/websocket-tester' \
-H 'Content-Type: application/json' \
-d '{"url":"wss://echo.websocket.events","subprotocol":"e.g. chat, graphql-ws","autoReconnect":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/websocket-tester| Name | Type | Required | Description |
|---|---|---|---|
| url | text | No | — |
| subprotocol | text | No | — |
| autoReconnect | checkbox | No | — |
Interactive result
{
"result": "Initial display content",
"interactive": true,
"components": [
{
"type": "timer",
"id": "timer1",
"config": {
"label": "Countdown",
"duration": 60
}
}
],
"state": {
"key": "value"
},
"actions": [
{
"type": "start",
"id": "start-btn",
"label": "Start"
}
],
"styles": "/* Custom CSS */",
"scripts": "/* Client-side scripts */",
"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-websocket-tester": {
"name": "websocket-tester",
"description": "Connect to any WebSocket (ws:// or wss://) endpoint from your browser, send and receive messages, and inspect open/close/error events with codes — ideal for debugging real-time APIs and sockets",
"baseUrl": "https://api.elysiatools.com/mcp/sse?toolId=websocket-tester",
"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": "websocket-tester",
"arguments": {
"url": "wss://echo.websocket.events",
"subprotocol": "e.g. chat, graphql-ws",
"autoReconnect": false
}
}
}Questions or issues? Contact [email protected]