* feat(python): add E2E testing for Python server in CI workflow
- Introduced a new job in the GitHub Actions workflow to run end-to-end tests against the Python MCP server.
- Updated the inspector.py to allow overriding the CDN base URL via an environment variable.
- Added a new script command for running Python E2E tests in the package.json.
- Enhanced documentation to include instructions for running Python server E2E tests.
* fix(inspector): skip proxy when inspector is served from the MCP server itself
When the inspector is embedded in a Python (or other) MCP server, the
window.location.origin matches the MCP server's origin, so
/inspector/api/proxy doesn't exist there. Routing auto-connect through
that missing proxy caused silent connection failures.
Now proxyAddress is only set when the inspector origin differs from the
target URL's origin (i.e. the inspector has its own server running).
Also add echo tool to server_example.py so python.test.ts can pass.
* fix(inspector): detect proxy availability via runtime config injection
Inject window.__MCP_PROXY_URL__ from the inspector server when it serves
the HTML. When served from a Python/custom MCP server (same origin), the
flag is absent and autoProxyFallback is disabled so no proxy is used.
- Add proxyUrl to RuntimeConfig in shared-static.ts
- Default to /inspector/api/proxy when inspector server serves
- Read __MCP_PROXY_URL__ in App.tsx and configure defaultAutoProxyFallback
- Disable autoProxyFallback when no proxy is available (no hosted fallback)
* ci: trigger inspector E2E workflow on PRs to canary/main
* ci: temporarily disable mix/prod/builtin E2E jobs for Python testing
* ci: re-enable all E2E jobs, workflow_dispatch only
* ci: re-enable E2E jobs for Python testing in CI workflow
* chore: enter canary prerelease mode
* chore(typescript): version packages (canary)
* fix(inspector): resolve auto-connect issues for embedded servers
This patch release addresses the auto-connect functionality of the inspector when served from an MCP server. Key changes include skipping the proxy when the inspector's origin matches the MCP server's origin and detecting proxy availability through runtime configuration. Additionally, the mcp-use package has been updated to version 1.21.2.
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Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>
* fix(python/server): simplify tool JSON Schema for Optional parameters
Pydantic generates {"anyOf": [{"type": "T"}, {"type": "null"}]} for
Optional[T] tool parameters. While valid JSON Schema 2020-12, this
pattern breaks description rendering in the MCP Inspector UI and fails
Gemini API validation (requires top-level type field). MCP signals
optionality via the required array, making the anyOf/null wrapper
redundant.
- Add simplify_optional_schema() utility that collapses nullable anyOf
into flat {"type": "T"} while preserving description, default, title
- Override MCPServer.add_tool() to apply simplification after Pydantic
generates the schema
- Add 12 unit tests for the schema simplifier (test_json_schema.py)
- Add 23 unit tests for tool schema output (test_list_tool_format.py)
- Update server_example.py with representative parameter patterns
including Literal enum types
* docs(python/server): add parameter types and JSON Schema section to tools docs
Document the Python-to-JSON-Schema type mapping, required/optional/nullable
parameter patterns, and Literal enum usage. Includes a note explaining the
anyOf/null simplification that mcp-use applies automatically.
* feat(python/server): add icons parameter to MCPServer constructor
Pass through the icons parameter to FastMCP so server-level icons can
be set directly in the MCPServer constructor.
* docs(python/server): document icons parameter in server overview
* docs(python): update server example with icons and Literal enum params
* style: format server_example.py
* test(python): add unit tests for icons constructor parameter
* docs: regenerate API reference for icons param
* fix(python/server): simplify tool JSON Schema for Optional parameters
Pydantic generates {"anyOf": [{"type": "T"}, {"type": "null"}]} for
Optional[T] tool parameters. While valid JSON Schema 2020-12, this
pattern breaks description rendering in the MCP Inspector UI and fails
Gemini API validation (requires top-level type field). MCP signals
optionality via the required array, making the anyOf/null wrapper
redundant.
- Add simplify_optional_schema() utility that collapses nullable anyOf
into flat {"type": "T"} while preserving description, default, title
- Override MCPServer.add_tool() to apply simplification after Pydantic
generates the schema
- Add 12 unit tests for the schema simplifier (test_json_schema.py)
- Add 23 unit tests for tool schema output (test_list_tool_format.py)
- Update server_example.py with representative parameter patterns
including Literal enum types
* docs(python/server): add parameter types and JSON Schema section to tools docs
Document the Python-to-JSON-Schema type mapping, required/optional/nullable
parameter patterns, and Literal enum usage. Includes a note explaining the
anyOf/null simplification that mcp-use applies automatically.
* fix(python/server): address PR review comments on json_schema.py
- Fix _simplify_property docstring: says "in place" but returns new dict
- Fix simplify_optional_schema docstring: document fast-path return when
no properties exist (returns original, not a copy)
- Wrap dict comprehension for line length
* style: format server_example.py
* docs: regenerate API reference for json_schema module
- Added detailed examples for defining tools, prompts, and resources in Python, showcasing their usage with annotations and context.
- Updated README to include a Python server example for weather information retrieval.
- Improved clarity on prompt and resource definitions, including argument descriptions and JSON-RPC responses.
- Enhanced documentation for better understanding of dynamic resources and tool functionalities.
* fix(python/server): improve debug and pretty_print_jsonrpc behavior
- Make pretty_print_jsonrpc work independently of debug_level
(previously required DEBUG=2 environment variable)
- Rename run_debug to debug in server.run() for consistency
- Make run(debug=True) override server's debug_level if it was 0
- Remove aggressive signal handlers that broke thread compatibility
(uvicorn handles SIGINT/SIGTERM gracefully)
- Update all documentation to use new debug parameter name
* refactor(python/server): remove unused lupo_tool function from server_example.py
* docs: update signals API reference after simplification
* refactor: remove unused signals.py module
uvicorn already handles SIGINT/SIGTERM gracefully, so custom signal
handlers are unnecessary. Removed the signals.py file and all references
to setup_signal_handlers().
* chore: remove analysis files
* chore: add example server pretty print JSON RPC for transparency
* updated telemetry module
* chore: agent side tel - langchain adapter - client tel
* server side tel:
* update API reference
* python transports and primitive reports are publishes only if not skipped
* remove wrongly generate files
* properly typed middleware
* remove examples
* feat(docs): add middleware and session management documentation
- Introduced new documentation for middleware, detailing hooks, minimal examples, and best practices for integrating middleware in MCP servers.
- Added a session management guide explaining session ID handling, usage patterns, and examples for managing per-client state in MCP servers.
- Updated to include links to the new middleware and session management pages.
* generate docs
* remove few events
* adapter tel
* adapter tel
* api ref docs update
* google adapter fix
* fix version
* fix event naming
* server example is streamable and echo tool fix
* removed initialize middleware hook, initialize requests are not passed thorugh normal handlers
* api ref
* beta on middleware
Enrico Toniato