ScreenSight

# FastMCP

> The fast, Pythonic way to build MCP servers and clients.

## Docs

- [Architecture](https://gofastmcp.com/apps/architecture.md): How FastMCP apps work under the hood — from Python to pixels.
- [Development](https://gofastmcp.com/apps/development.md): Preview and test your app tools locally without a full MCP host.
- [Examples](https://gofastmcp.com/apps/examples.md): Example apps you can run right now.
- [FastMCPApp](https://gofastmcp.com/apps/fastmcp-app.md): Wire an interactive UI to backend tools with managed visibility and composition safety.
- [Generative UI](https://gofastmcp.com/apps/generative.md): Let the LLM build custom Prefab UIs on the fly.
- [Custom HTML Apps](https://gofastmcp.com/apps/low-level.md): Build apps with your own HTML, CSS, and JavaScript using the MCP Apps extension directly.
- [Apps](https://gofastmcp.com/apps/overview.md): Give your tools interactive UIs rendered directly in the conversation.
- [Interactive Tools](https://gofastmcp.com/apps/prefab.md): Turn your tools into interactive UIs with charts, tables, and dashboards.
- [Approval](https://gofastmcp.com/apps/providers/approval.md): Human-in-the-loop approval gates for agent actions
- [Choice](https://gofastmcp.com/apps/providers/choice.md): Present clickable options instead of free-text responses
- [File Upload](https://gofastmcp.com/apps/providers/file-upload.md): Drag-and-drop file upload for any MCP server
- [Form Input](https://gofastmcp.com/apps/providers/form.md): Collect structured data from users via Pydantic models
- [Quickstart](https://gofastmcp.com/apps/quickstart.md): Build your first FastMCP app in under a minute.
- [Changelog](https://gofastmcp.com/changelog.md)
- [Auth Utilities](https://gofastmcp.com/cli/auth.md): Create and validate CIMD documents for OAuth
- [Client Commands](https://gofastmcp.com/cli/client.md): List tools, call them, and discover configured servers
- [Generate CLI](https://gofastmcp.com/cli/generate-cli.md): Scaffold a standalone typed CLI from any MCP server
- [Inspecting Servers](https://gofastmcp.com/cli/inspecting.md): View a server's components and metadata
- [Install MCP Servers](https://gofastmcp.com/cli/install-mcp.md): Install MCP servers into Claude, Cursor, Gemini, and other clients
- [CLI](https://gofastmcp.com/cli/overview.md): The fastmcp command-line interface
- [Running Servers](https://gofastmcp.com/cli/running.md): Start, develop, and configure servers from the command line
- [Bearer Token Authentication](https://gofastmcp.com/clients/auth/bearer.md): Authenticate your FastMCP client with a Bearer token.
- [CIMD Authentication](https://gofastmcp.com/clients/auth/cimd.md): Use Client ID Metadata Documents for verifiable, domain-based client identity.
- [Machine-to-Machine Authentication](https://gofastmcp.com/clients/auth/client-credentials.md): Authenticate your FastMCP client to a protected server without a browser.
- [OAuth Authentication](https://gofastmcp.com/clients/auth/oauth.md): Authenticate your FastMCP client via OAuth 2.1.
- [The FastMCP Client](https://gofastmcp.com/clients/client.md): Programmatic client for interacting with MCP servers through a well-typed, Pythonic interface.
- [Client-Only Package](https://gofastmcp.com/clients/client-only-package.md): Use FastMCP's client without installing the full server framework.
- [User Elicitation](https://gofastmcp.com/clients/elicitation.md): Handle server requests for structured user input.
- [fastmcp-remote](https://gofastmcp.com/clients/fastmcp-remote.md): Bridge remote MCP servers into stdio-only MCP hosts with uvx fastmcp-remote.
- [Server Logging](https://gofastmcp.com/clients/logging.md): Receive and handle log messages from MCP servers.
- [Notifications](https://gofastmcp.com/clients/notifications.md): Handle server-sent notifications for list changes and other events.
- [Progress Monitoring](https://gofastmcp.com/clients/progress.md): Handle progress notifications from long-running server operations.
- [Getting Prompts](https://gofastmcp.com/clients/prompts.md): Retrieve rendered message templates with automatic argument serialization.
- [Reading Resources](https://gofastmcp.com/clients/resources.md): Access static and templated data sources from MCP servers.
- [Client Roots](https://gofastmcp.com/clients/roots.md): Tell servers which local paths your client can reach.
- [LLM Sampling](https://gofastmcp.com/clients/sampling.md): Answer a server's request for an LLM completion.
- [Background Tasks](https://gofastmcp.com/clients/tasks.md): Call long-running tools without blocking, and answer questions they ask mid-run.
- [Calling Tools](https://gofastmcp.com/clients/tools.md): Execute server-side tools and handle structured results.
- [Client Transports](https://gofastmcp.com/clients/transports.md): Configure how clients connect to and communicate with MCP servers.
- [HTTP Deployment](https://gofastmcp.com/deployment/http.md): Deploy your FastMCP server over HTTP for remote access
- [Prefect Horizon](https://gofastmcp.com/deployment/prefect-horizon.md): The MCP platform from the FastMCP team
- [Running Your Server](https://gofastmcp.com/deployment/running-server.md): Learn how to run your FastMCP server locally for development and testing
- [Sandboxed Agents](https://gofastmcp.com/deployment/sandboxed-agents.md): Expose MCP tools to isolated agents without giving the sandbox long-lived credentials.
- [Project Configuration](https://gofastmcp.com/deployment/server-configuration.md): Use fastmcp.json for portable, declarative project configuration
- [Contributing](https://gofastmcp.com/development/contributing.md): Development workflow for FastMCP contributors
- [Releases](https://gofastmcp.com/development/releases.md): FastMCP versioning and release process
- [Tests](https://gofastmcp.com/development/tests.md): Testing patterns and requirements for FastMCP
- [Installation](https://gofastmcp.com/getting-started/installation.md): Install FastMCP and verify your setup
- [Quickstart](https://gofastmcp.com/getting-started/quickstart.md)
- [Upgrading from FastMCP 2](https://gofastmcp.com/getting-started/upgrading/from-fastmcp-2.md): What changed in FastMCP 3 for servers written against FastMCP 2
- [Upgrading from FastMCP 3](https://gofastmcp.com/getting-started/upgrading/from-fastmcp-3.md): What changes when you upgrade to FastMCP 4, which builds on the MCP Python SDK v2
- [Upgrading from the Low-Level SDK v1](https://gofastmcp.com/getting-started/upgrading/from-low-level-sdk-v1.md): Upgrade your MCP server from v1 of the low-level Python SDK's Server class to FastMCP
- [Upgrading from the Low-Level SDK v2](https://gofastmcp.com/getting-started/upgrading/from-low-level-sdk-v2.md): Move a server built on v2 of the low-level Python SDK's Server class to FastMCP
- [Upgrading from MCP SDK v1](https://gofastmcp.com/getting-started/upgrading/from-mcp-sdk-v1.md): Upgrade from FastMCP 1.0, bundled in v1 of the MCP Python SDK, to the standalone FastMCP framework
- [Upgrading from MCP SDK v2](https://gofastmcp.com/getting-started/upgrading/from-mcp-sdk-v2.md): Move a server built on the MCP Python SDK v2's MCPServer class to FastMCP
- [FastMCP: The Framework for MCP](https://gofastmcp.com/getting-started/welcome.md): FastMCP is the standard framework for building Model Context Protocol (MCP) servers, clients, and interactive applications.
- [What's New in FastMCP 4](https://gofastmcp.com/getting-started/whats-new.md): FastMCP 4 makes stateful MCP applications work on the sessionless protocol while one server serves every protocol era.
- [Anthropic API 🤝 FastMCP](https://gofastmcp.com/integrations/anthropic.md): Connect FastMCP servers to the Anthropic API
- [Auth0 OAuth 🤝 FastMCP](https://gofastmcp.com/integrations/auth0.md): Secure your FastMCP server with Auth0 OAuth
- [AuthKit 🤝 FastMCP](https://gofastmcp.com/integrations/authkit.md): Secure your FastMCP server with AuthKit by WorkOS
- [AWS Cognito OAuth 🤝 FastMCP](https://gofastmcp.com/integrations/aws-cognito.md): Secure your FastMCP server with AWS Cognito user pools
- [Azure (Microsoft Entra ID) OAuth 🤝 FastMCP](https://gofastmcp.com/integrations/azure.md): Secure your FastMCP server with Azure/Microsoft Entra OAuth
- [ChatGPT 🤝 FastMCP](https://gofastmcp.com/integrations/chatgpt.md): Connect FastMCP servers to ChatGPT in Chat and Deep Research modes
- [Claude Code 🤝 FastMCP](https://gofastmcp.com/integrations/claude-code.md): Install and use FastMCP servers in Claude Code
- [Claude Desktop 🤝 FastMCP](https://gofastmcp.com/integrations/claude-desktop.md): Connect FastMCP servers to Claude Desktop
- [Cursor 🤝 FastMCP](https://gofastmcp.com/integrations/cursor.md): Install and use FastMCP servers in Cursor
- [Descope 🤝 FastMCP](https://gofastmcp.com/integrations/descope.md): Secure your FastMCP server with Descope
- [Discord OAuth 🤝 FastMCP](https://gofastmcp.com/integrations/discord.md): Secure your FastMCP server with Discord OAuth
- [Eunomia Authorization 🤝 FastMCP](https://gofastmcp.com/integrations/eunomia-authorization.md): Add policy-based authorization to your FastMCP servers with Eunomia
- [FastAPI 🤝 FastMCP](https://gofastmcp.com/integrations/fastapi.md): Integrate FastMCP with FastAPI applications
- [Gemini SDK 🤝 FastMCP](https://gofastmcp.com/integrations/gemini.md): Connect FastMCP servers to the Google Gemini SDK
- [Gemini CLI 🤝 FastMCP](https://gofastmcp.com/integrations/gemini-cli.md): Install and use FastMCP servers in Gemini CLI
- [GitHub OAuth 🤝 FastMCP](https://gofastmcp.com/integrations/github.md): Secure your FastMCP server with GitHub OAuth
- [Google OAuth 🤝 FastMCP](https://gofastmcp.com/integrations/google.md): Secure your FastMCP server with Google OAuth
- [Goose 🤝 FastMCP](https://gofastmcp.com/integrations/goose.md): Install and use FastMCP servers in Goose
- [Hugging Face OAuth 🤝 FastMCP](https://gofastmcp.com/integrations/huggingface.md): Secure your FastMCP server with Hugging Face OAuth
- [Keycloak OAuth 🤝 FastMCP](https://gofastmcp.com/integrations/keycloak.md): Secure your FastMCP server with Keycloak OAuth
- [MCP JSON Configuration 🤝 FastMCP](https://gofastmcp.com/integrations/mcp-json-configuration.md): Generate standard MCP configuration files for any compatible client
- [OCI IAM OAuth 🤝 FastMCP](https://gofastmcp.com/integrations/oci.md): Secure your FastMCP server with OCI IAM OAuth
- [OpenAI API 🤝 FastMCP](https://gofastmcp.com/integrations/openai.md): Connect FastMCP servers to the OpenAI API
- [OpenAPI 🤝 FastMCP](https://gofastmcp.com/integrations/openapi.md): Generate MCP servers from any OpenAPI specification
- [Permit.io Authorization 🤝 FastMCP](https://gofastmcp.com/integrations/permit.md): Add fine-grained authorization to your FastMCP servers with Permit.io
- [PropelAuth 🤝 FastMCP](https://gofastmcp.com/integrations/propelauth.md): Secure your FastMCP server with PropelAuth
- [Pydantic AI 🤝 FastMCP](https://gofastmcp.com/integrations/pydantic-ai.md): Connect FastMCP servers to Pydantic AI agents using the FastMCPToolset
- [Scalekit 🤝 FastMCP](https://gofastmcp.com/integrations/scalekit.md): Secure your FastMCP server with Scalekit
- [Supabase 🤝 FastMCP](https://gofastmcp.com/integrations/supabase.md): Secure your FastMCP server with Supabase Auth
- [WorkOS 🤝 FastMCP](https://gofastmcp.com/integrations/workos.md): Authenticate FastMCP servers with WorkOS Connect
- [FAQ](https://gofastmcp.com/more/faq.md): Direct answers to the questions that come up most often about FastMCP 4, the protocol eras, and installation
- [Settings](https://gofastmcp.com/more/settings.md): Configure FastMCP behavior through environment variables or a .env file.
- [Contrib Modules](https://gofastmcp.com/patterns/contrib.md): Community-contributed modules extending FastMCP
- [__init__](https://gofastmcp.com/python-sdk/fastmcp-apps-__init__.md)
- [app](https://gofastmcp.com/python-sdk/fastmcp-apps-app.md)
- [approval](https://gofastmcp.com/python-sdk/fastmcp-apps-approval.md)
- [choice](https://gofastmcp.com/python-sdk/fastmcp-apps-choice.md)
- [config](https://gofastmcp.com/python-sdk/fastmcp-apps-config.md)
- [file_upload](https://gofastmcp.com/python-sdk/fastmcp-apps-file_upload.md)
- [form](https://gofastmcp.com/python-sdk/fastmcp-apps-form.md)
- [generative](https://gofastmcp.com/python-sdk/fastmcp-apps-generative.md)
- [cli](https://gofastmcp.com/python-sdk/fastmcp-cli.md)
- [decorators](https://gofastmcp.com/python-sdk/fastmcp-decorators.md)
- [dependencies](https://gofastmcp.com/python-sdk/fastmcp-dependencies.md)
- [exceptions](https://gofastmcp.com/python-sdk/fastmcp-exceptions.md)
- [code_mode](https://gofastmcp.com/python-sdk/fastmcp-experimental-transforms-code_mode.md)
- [mcp_config](https://gofastmcp.com/python-sdk/fastmcp-mcp_config.md)
- [settings](https://gofastmcp.com/python-sdk/fastmcp-settings.md)
- [telemetry](https://gofastmcp.com/python-sdk/fastmcp-telemetry.md)
- [types](https://gofastmcp.com/python-sdk/fastmcp-types.md)
- [__init__](https://gofastmcp.com/python-sdk/fastmcp-utilities-__init__.md)
- [asgi_transport](https://gofastmcp.com/python-sdk/fastmcp-utilities-asgi_transport.md)
- [async_utils](https://gofastmcp.com/python-sdk/fastmcp-utilities-async_utils.md)
- [auth](https://gofastmcp.com/python-sdk/fastmcp-utilities-auth.md)
- [authorization](https://gofastmcp.com/python-sdk/fastmcp-utilities-authorization.md)
- [cli](https://gofastmcp.com/python-sdk/fastmcp-utilities-cli.md)
- [components](https://gofastmcp.com/python-sdk/fastmcp-utilities-components.md)
- [docstring_parsing](https://gofastmcp.com/python-sdk/fastmcp-utilities-docstring_parsing.md)
- [exceptions](https://gofastmcp.com/python-sdk/fastmcp-utilities-exceptions.md)
- [http](https://gofastmcp.com/python-sdk/fastmcp-utilities-http.md)
- [inspect](https://gofastmcp.com/python-sdk/fastmcp-utilities-inspect.md)
- [json_schema](https://gofastmcp.com/python-sdk/fastmcp-utilities-json_schema.md)
- [json_schema_type](https://gofastmcp.com/python-sdk/fastmcp-utilities-json_schema_type.md)
- [lifespan](https://gofastmcp.com/python-sdk/fastmcp-utilities-lifespan.md)
- [logging](https://gofastmcp.com/python-sdk/fastmcp-utilities-logging.md)
- [__init__](https://gofastmcp.com/python-sdk/fastmcp-utilities-mcp_server_config-__init__.md)
- [__init__](https://gofastmcp.com/python-sdk/fastmcp-utilities-mcp_server_config-v1-environments-__init__.md)
- [base](https://gofastmcp.com/python-sdk/fastmcp-utilities-mcp_server_config-v1-environments-base.md)
- [uv](https://gofastmcp.com/python-sdk/fastmcp-utilities-mcp_server_config-v1-environments-uv.md)
- [mcp_server_config](https://gofastmcp.com/python-sdk/fastmcp-utilities-mcp_server_config-v1-mcp_server_config.md)
- [base](https://gofastmcp.com/python-sdk/fastmcp-utilities-mcp_server_config-v1-sources-base.md)
- [filesystem](https://gofastmcp.com/python-sdk/fastmcp-utilities-mcp_server_config-v1-sources-filesystem.md)
- [mime](https://gofastmcp.com/python-sdk/fastmcp-utilities-mime.md)
- [openapi](https://gofastmcp.com/python-sdk/fastmcp-utilities-openapi.md)
- [pagination](https://gofastmcp.com/python-sdk/fastmcp-utilities-pagination.md)
- [skills](https://gofastmcp.com/python-sdk/fastmcp-utilities-skills.md)
- [tasks](https://gofastmcp.com/python-sdk/fastmcp-utilities-tasks.md)
- [tests](https://gofastmcp.com/python-sdk/fastmcp-utilities-tests.md)
- [timeout](https://gofastmcp.com/python-sdk/fastmcp-utilities-timeout.md)
- [token_cache](https://gofastmcp.com/python-sdk/fastmcp-utilities-token_cache.md)
- [types](https://gofastmcp.com/python-sdk/fastmcp-utilities-types.md)
- [ui](https://gofastmcp.com/python-sdk/fastmcp-utilities-ui.md)
- [version_check](https://gofastmcp.com/python-sdk/fastmcp-utilities-version_check.md)
- [versions](https://gofastmcp.com/python-sdk/fastmcp-utilities-versions.md)
- [Authentication](https://gofastmcp.com/servers/auth/authentication.md): Secure your FastMCP server with flexible authentication patterns, from simple API keys to full OAuth 2.1 integration with external identity providers.
- [Full OAuth Server](https://gofastmcp.com/servers/auth/full-oauth-server.md): Build a self-contained authentication system where your FastMCP server manages users, issues tokens, and validates them.
- [Multiple Auth Sources](https://gofastmcp.com/servers/auth/multi-auth.md): Accept tokens from multiple authentication sources with a single server.
- [OAuth Proxy](https://gofastmcp.com/servers/auth/oauth-proxy.md): Bridge traditional OAuth providers to work seamlessly with MCP's authentication flow.
- [OIDC Proxy](https://gofastmcp.com/servers/auth/oidc-proxy.md): Bridge OIDC providers to work seamlessly with MCP's authentication flow.
- [Remote OAuth](https://gofastmcp.com/servers/auth/remote-oauth.md): Integrate your FastMCP server with external identity providers like Descope, WorkOS, Auth0, and corporate SSO systems.
- [Token Verification](https://gofastmcp.com/servers/auth/token-verification.md): Protect your server by validating bearer tokens issued by external systems.
- [Authorization](https://gofastmcp.com/servers/authorization.md): Control access to components using callable-based authorization checks that filter visibility and enforce permissions.
- [Argument Completion](https://gofastmcp.com/servers/completions.md): Suggest values for prompt arguments and resource template parameters as the user types.
- [Composing Servers](https://gofastmcp.com/servers/composition.md): Combine multiple servers into one
- [MCP Context](https://gofastmcp.com/servers/context.md): Access MCP capabilities like logging, progress, and resources within your MCP objects.
- [Dependency Injection](https://gofastmcp.com/servers/dependency-injection.md): Inject runtime values like HTTP requests, access tokens, and custom dependencies into your MCP components.
- [User Elicitation](https://gofastmcp.com/servers/elicitation.md): Ask users for input while a tool is running, on both the handshake and modern protocols.
- [Server Extensions](https://gofastmcp.com/servers/extensions.md): Add negotiated protocol features to a server without forking the framework.
- [Icons](https://gofastmcp.com/servers/icons.md): Add visual icons to your servers, tools, resources, and prompts
- [Lifespans](https://gofastmcp.com/servers/lifespan.md): Server-level setup and teardown with composable lifespans
- [Client Logging](https://gofastmcp.com/servers/logging.md): Send log messages back to MCP clients through the context.
- [Middleware](https://gofastmcp.com/servers/middleware.md): Add cross-cutting functionality to your MCP server with middleware that intercepts and modifies requests and responses.
- [Pagination](https://gofastmcp.com/servers/pagination.md): Control how servers return large lists of components to clients.
- [Progress Reporting](https://gofastmcp.com/servers/progress.md): Update clients on the progress of long-running operations through the MCP context.
- [Prompts](https://gofastmcp.com/servers/prompts.md): Create reusable, parameterized prompt templates for MCP clients.
- [Custom Providers](https://gofastmcp.com/servers/providers/custom.md): Build providers that source components from any data source
- [Filesystem Provider](https://gofastmcp.com/servers/providers/filesystem.md): Automatic component discovery from Python files
- [Local Provider](https://gofastmcp.com/servers/providers/local.md): The default provider for decorator-registered components
- [Providers](https://gofastmcp.com/servers/providers/overview.md): How FastMCP sources tools, resources, and prompts
- [MCP Proxy Provider](https://gofastmcp.com/servers/providers/proxy.md): Source components from other MCP servers
- [Skills Provider](https://gofastmcp.com/servers/providers/skills.md): Expose agent skills as MCP resources
- [Resources & Templates](https://gofastmcp.com/servers/resources.md): Expose data sources and dynamic content generators to your MCP client.
- [Sampling](https://gofastmcp.com/servers/sampling.md): Generate text from a FastMCP server — by calling an LLM directly, or by asking the client to sample.
- [The FastMCP Server](https://gofastmcp.com/servers/server.md): The core FastMCP server class for building MCP applications
- [Session State](https://gofastmcp.com/servers/sessions.md): Persist state across requests on stateless connections.
- [Storage Backends](https://gofastmcp.com/servers/storage-backends.md): Configure persistent and distributed storage for caching and OAuth state management
- [Background Tasks](https://gofastmcp.com/servers/tasks.md): Run long-running tools asynchronously with progress tracking
- [OpenTelemetry](https://gofastmcp.com/servers/telemetry.md): Native OpenTelemetry instrumentation for distributed tracing.
- [Testing your FastMCP Server](https://gofastmcp.com/servers/testing.md): How to test your FastMCP server.
- [Tool Fingerprinting](https://gofastmcp.com/servers/tool-fingerprinting.md): Build stable fingerprints for tool identity and schema change detection
- [Tools](https://gofastmcp.com/servers/tools.md): Expose functions as executable capabilities for your MCP client.
- [Code Mode](https://gofastmcp.com/servers/transforms/code-mode.md): Let LLMs write Python to orchestrate tools in a sandbox
- [Namespace Transform](https://gofastmcp.com/servers/transforms/namespace.md): Prefix component names to prevent conflicts
- [Prompts as Tools](https://gofastmcp.com/servers/transforms/prompts-as-tools.md): Expose prompts to tool-only clients
- [Resources as Tools](https://gofastmcp.com/servers/transforms/resources-as-tools.md): Expose resources to tool-only clients
- [Tool Search](https://gofastmcp.com/servers/transforms/tool-search.md): Replace large tool catalogs with on-demand search
- [Tool Transformation](https://gofastmcp.com/servers/transforms/tool-transformation.md): Modify tool schemas - rename, reshape arguments, and customize behavior
- [Transforms Overview](https://gofastmcp.com/servers/transforms/transforms.md): Modify components as they flow through your server
- [Versioning](https://gofastmcp.com/servers/versioning.md): Serve multiple API versions from a single codebase
- [Component Visibility](https://gofastmcp.com/servers/visibility.md): Control which components are available to clients
- [FastMCP Updates](https://gofastmcp.com/updates.md)