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55 lines
1.9 KiB
Markdown
55 lines
1.9 KiB
Markdown
# MCP Simple StreamableHttp Server Example
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A simple MCP server example demonstrating the StreamableHttp transport, which enables HTTP-based communication with MCP servers using streaming.
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## Features
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- Uses the StreamableHTTP transport for server-client communication
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- Supports REST API operations (POST, GET, DELETE) for `/mcp` endpoint
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- Task management with anyio task groups
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- Ability to send multiple notifications over time to the client
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- Proper resource cleanup and lifespan management
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- Resumability support via InMemoryEventStore
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## Usage
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Start the server on the default or custom port:
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```bash
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# Using custom port
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uv run mcp-simple-streamablehttp --port 3000
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# Custom logging level
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uv run mcp-simple-streamablehttp --log-level DEBUG
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# Enable JSON responses instead of SSE streams
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uv run mcp-simple-streamablehttp --json-response
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```
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The server exposes a tool named "start-notification-stream" that accepts three arguments:
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- `interval`: Time between notifications in seconds (e.g., 1.0)
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- `count`: Number of notifications to send (e.g., 5)
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- `caller`: Identifier string for the caller
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## Resumability Support
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This server includes resumability support through the InMemoryEventStore. This enables clients to:
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- Reconnect to the server after a disconnection
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- Resume event streaming from where they left off using the Last-Event-ID header
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The server will:
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- Generate unique event IDs for each SSE message
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- Store events in memory for later replay
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- Replay missed events when a client reconnects with a Last-Event-ID header
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Note: The InMemoryEventStore is designed for demonstration purposes only. For production use, consider implementing a persistent storage solution.
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## Client
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You can connect to this server using an HTTP client, for now only Typescript SDK has streamable HTTP client examples or you can use [Inspector](https://github.com/modelcontextprotocol/inspector) |