Update all FastMCP examples to use mcp.server.fastmcp instead of fastmcp.
Add tests to verify example servers work correctly.
Changes:
- Update import paths in all example files
- Create test_examples.py to verify functionality
- Fix test assertions to match actual response format
This commit integrates FastMCP, a high-level MCP server implementation originally written by Jeremiah Lowin,
into the official MCP SDK. It also updates dependencies and adds new dev dependencies.
It moves the existing SDK into a .lowlevel .
The helper types in mcp.server.types got really confusioning during
implementation as they overlapped with mcp.types. I now believe it
is better if we stay more low level to the spec types.
To do this, we now only use mcp.types everywhere. We renamed mcp.server.types
to mcp.server.models and removed it to the absolute minimum.
Replace generic capability dictionaries with structured types for prompts,
resources, tools, and roots. This improves type safety and makes capability
features like listChanged and subscribe more explicit in the protocol.
## Goal
Support running an MCP server in the same process as the client, while preserving MCP abstractions.
## Details
1. **(core change)** Adds a new `memory` transport module that enables in-process client-server communication.
This includes:
- `create_client_server_memory_streams()` to create bidirectional memory streams
- `create_connected_server_and_client_session()` to establish an in-process client-server connection
3. (minor) Enhances error handling and timeout support:
- Adds configurable read timeouts to sessions via `read_timeout_seconds` parameter
- Improves exception handling in the server with a new `raise_exceptions` flag to control whether errors are returned to clients or raised directly
- Ensures proper cleanup of request context tokens in error cases
4. (minor) Makes server improvements:
- Adds built-in ping handler support
