MCP Calculator Streamable HTTP

activate

source .venv/bin/activate

run

uv run mcp dev server.py

run

python3 server.py

test (agent auto)

use the mcp calculator_streamable_http add 1 to 1 and show the result

curl

1 Initialize Session curl -X POST http://localhost:8000/mcp
-H "Content-Type: application/json"
-H "MCP-Protocol-Version: 2025-06-18"
-H "Accept: application/json, text/event-stream"
-d '{ "jsonrpc":"2.0", "id":1, "method":"initialize", "params":{"protocolVersion":"2025-06-18", "capabilities":{"tools":{}}, "clientInfo":{"name":"test-client", "version":"1.0.0"}}}'

1 Initialize Session and get session-id curl -X POST http://localhost:8000/mcp
-H "Content-Type: application/json"
-H "MCP-Protocol-Version: 2025-06-18"
-H "Accept: application/json, text/event-stream"
-d '{ "jsonrpc":"2.0", "id":1, "method":"initialize", "params":{"protocolVersion":"2025-06-18", "capabilities":{"tools":{}}, "clientInfo":{"name":"test-client", "version":"1.0.0"}}}'
-v 2>&1 | grep -i "mcp-session-id" | cut -d' ' -f3

2. Send Initialized Notification curl -X POST http://localhost:8000/mcp
   -H "Content-Type: application/json"
   -H "MCP-Protocol-Version: 2025-06-18"
   -H "Accept: application/json, text/event-stream"
   -H "Mcp-Session-Id: b7ab76da70b24c04afaf1123bfba5523"
   -d '{"jsonrpc":"2.0","method":"notifications/initialized"}'
3. List Tools curl -X POST http://localhost:8000/mcp
   -H "Content-Type: application/json"
   -H "MCP-Protocol-Version: 2025-06-18"
   -H "Accept: application/json, text/event-stream"
   -H "Mcp-Session-Id: b7ab76da70b24c04afaf1123bfba5523"
   -d '{"jsonrpc":"2.0","id":2,"method":"tools/list"}'
4. Call Add Tool curl -X POST http://localhost:8000/mcp
   -H "Content-Type: application/json"
   -H "MCP-Protocol-Version: 2025-06-18"
   -H "Accept: application/json, text/event-stream"
   -H "Mcp-Session-Id: b7ab76da70b24c04afaf1123bfba5523"
   -d '{"jsonrpc":"2.0","id":3,"method":"tools/call","params":{"name":"add","arguments":{"a":1,"b":1}}}'