Send notifications/tasks/status when progress updates. Args: session: MCP ServerSession task_id: Client-visible task ID t

Send notifications/tasks/status to client. Per SEP-1686 line 454: notification SHOULD NOT include related-task metadata (taskId is already in

Serialize query parameter values according to their OpenAPI style/explode settings. By default (style=form, explode=true), list valu

Background task that manages the actual session lifecycle. This task runs in the background and: 1. Establishes the transpor

Set the access token in the auth context var.

Set visibility state in tool metadata. This uses the same metadata format as the Visibility transform, so tools marked here will be filtered

Set up core MCP protocol handlers. List handlers use SDK decorators that pass the request object to our handler (needed for paginatio

Register SEP-1686 task protocol handlers with SDK. Only registers handlers if docket is installed. Without docket, task protocol requ

Display consent page or auto-approve/deny based on cookies.

Optimize JSON schemas in a single traversal for better performance. This function combines three schema cleanup operations that would normal

Convert text to a URL-friendly slug format. Only contains lowercase letters, uppercase letters, numbers, and underscores.

Find all spec files for a given provider.

Mark a tool as needing a Prefab renderer resource. Sets ``meta["ui"]["resourceUri"]`` to a placeholder URI. The server recognizes the placeho

Start the user's MCP server as a subprocess on mcp_port.

A standalone connection task for a stdio transport. It is not a part of the StdioTransport class to ensure that the connection task does not hold

Recursively remove OpenAPI ``discriminator`` keys from a schema. Pydantic emits ``discriminator.mapping`` with values like ``#/$defs/ClassNam

Handle consent approval/denial, set cookies, and redirect appropriately.

Terminate a subprocess and all its children. Sends SIGTERM to the process group first for graceful shutdown, then falls back to SIGKILL if th

Run json_schema_to_type on every schema for one provider.

Turn the transforming server into a FastMCP proxy and return its transport.

Build a regular tool-use reply.

Generate a SKILL.md section for a single tool.

Serialize a list of tools to JSON-safe dicts.

Strip ``{identifier_uri}/`` from custom API scopes Azure echoes back. Inverse of :meth:`_prefix_scopes_for_azure`. Azure echoes the prefixed

Remove all clamped log filters from the logger.

Maps flat arguments back to their OpenAPI locations using the parameter map. Args: route: HTTPRoute with parameter_map c

Unwrap ``Annotated`` and return the underlying Pydantic model, if any.

Extract the logical return value from a ToolResult.

Convert a ToolResult for use in the sandbox. - Output schema present → structured_content dict (matches the schema) - Otherwise → concatenate

Actions to update all three status lists from a tool result.

Patch returned token scopes from the upstream token response. Hugging Face OAuth access tokens are opaque. The userinfo endpoint vali

Whether this provider verifies a different token than the access token. When True, ``load_access_token`` patches the validated result with

Verify the consent binding for a specific transaction.

Poll until the server is accepting connections.

Wrap ``fn`` so a ``pydantic.ValidationError`` raised by its body is re-raised as ``_ToolBodyError``. The wrapper preserves ``fn``'s signature

Wrap a list handler to pass the request and return ServerResult.

Add or update a server in the configuration.

Schedule this template for background execution via docket. The child's FunctionResourceTemplate.fn is registered (via get_tasks), an

Filter and analyze sales data. Returns rows, summary, and chart data.

Add two numbers.

Make LLM call using the fallback handler. Note: This function expects the caller (sample_step) to have validated that sampling_handler is set

Cancel a task, transitioning it to cancelled state. Sends a 'tasks/cancel' MCP protocol request. Task will halt execution and transit

Check whether the connected client supports a given MCP extension. Inspects the ``extensions`` extra field on ``ClientCapabilities``

Close an issue with a comment. Closes first, then comments — so a failed comment never leaves a misleading "closing" notice on a stil

Close an issue with a comment and add duplicate label.

Close all cached OBO credentials.

Send a completion request to the server. Args: ref (mcp.types.ResourceTemplateReference | mcp.types.PromptReference): The referen

Send a completion request and return the complete MCP protocol result. Args: ref (mcp.types.ResourceTemplateReference | mcp.types

Compute SHA256 hash of a file.

Convert a raw result to ResourceResult. This is used in two contexts: 1. In _read() to convert user function return values to Resourc

Create the mock OAuth server application.

Create a FastMCP server from a client URL. Args: url: The URL to connect to Returns: A FastMCP server instance

Create a detail box with key-value pairs. Args: rows: List of (label, value) tuples Returns: HTML for detail box

Create a synthetic 'final_response' tool for structured output. This tool is used to capture structured responses from the LLM. The tool's sc

Create FastMCP server with GitHub OAuth protection.

Create FastMCP server with GitHub OAuth that mocks the callback for testing.

Create a unified post with optional features. Args: text: Post text (max 300 chars) images: URLs of images to attach (max 4)

Create a FastMCP server with a slow tool.

Generate a test JWT token for testing purposes. Args: subject: Subject claim (usually user ID) issuer: Issue