Initialize HeadlessOAuth with stored response tracking.

Initialise the cache. Args: ttl_seconds: How long cached entries remain valid, in seconds. ``None`` or ``0`` disa

Initialize FileSystemSource, handling path:object syntax.

Initialize the parser with the OpenAPI schema and type classes.

Initialize with a parsed SchemaPath object.

Initialize a Lifespan wrapper. Args: fn: An async generator function that takes a FastMCP server and yields a dic

Initialize with a context manager factory function.

Initialize a composed lifespan. Args: left: The first lifespan to enter. right: The second lifespan to enter.

Initialize logging middleware. Args: logger: Logger instance to use. If None, creates a logger named 'fastmcp.requests'

Initialize structured logging middleware. Args: logger: Logger instance to use. If None, creates a logger named 'fastmcp.structur

Initialize error handling middleware. Args: logger: Logger instance for error logging. If None, uses 'fastmcp.errors'

Initialize retry middleware. Args: max_retries: Maximum number of retry attempts base_delay: Initial delay between re

Initialize timing middleware. Args: logger: Logger instance to use. If None, creates a logger named 'fastmcp.timing'

Initialize detailed timing middleware. Args: logger: Logger instance to use. If None, creates a logger named 'fastmcp.timing.deta

Initialize the response caching middleware. Args: cache_storage: The cache backend to use. If None, an in-memory cache is used.

Initialize token bucket. Args: capacity: Maximum number of tokens in the bucket refill_rate: Tokens added per second

Initialize sliding window rate limiter. Args: max_requests: Maximum requests allowed in the time window window_second

Initialize rate limiting middleware. Args: max_requests_per_second: Sustained requests per second allowed burst_capac

Initialize sliding window rate limiting middleware. Args: max_requests: Maximum requests allowed in the time window w

Initialize ping middleware. Args: interval_ms: Interval between pings in milliseconds (default: 30000) Raises:

Initialize the tool injection middleware.

Initialize response limiting middleware. Args: max_size: Maximum response size in bytes. Defaults to 1MB (1,000,000).

Initialize wrapped provider. Args: inner: The provider to wrap. transform: The transform to apply on top of inner's r

Initialize with an optional sequence of providers. Args: providers: Optional initial providers (without namespacing).

Initialize a ProxyProvider. Args: client_factory: A callable that returns a Client instance when called.

Initialize the proxy server. FastMCPProxy requires explicit session management via client_factory. Use create_proxy() for convenience

Initialize a LocalProvider with empty storage. Args: on_duplicate: Behavior when adding a component that already exists:

Initialize provider by parsing OpenAPI spec and creating components. Args: openapi_spec: OpenAPI schema as a dictionary

Initialize JWT issuer. Args: issuer: Token issuer (FastMCP server base URL) audience: Token audience (typically {base

Initialize the authenticator. Args: provider: OAuth provider for client lookups cimd_manager: CIMD manager for privat

Initialize the auth provider. Args: base_url: The base URL of this server (e.g., http://localhost:8000).

Initialize the token verifier. Args: base_url: The base URL of this server resource_base_url: Optional publi

Initialize the remote auth provider. Args: token_verifier: TokenVerifier instance for token validation authorization_

Initialize the OAuth provider. Args: base_url: The public URL of this FastMCP server resource_base_url: Opti

Initialize the OIDC proxy provider. Args: config_url: URL of upstream configuration strict: Optional strict flag for

Initialize the CIMD fetcher. Args: timeout: HTTP request timeout in seconds (default 10.0)

Initialize CIMD client manager. Args: enable_cimd: Whether CIMD support is enabled default_scope: Default scope for C

Initialize Supabase metadata provider. Args: project_url: Your Supabase project URL (e.g., "https://abc123.supabase.co")

Initialize the debug token verifier. Args: validate: Callable that takes a token string and returns True if valid.

Initialize the GitHub token verifier. Args: required_scopes: Required OAuth scopes (e.g., ['user:email']) timeout_sec

Initialize Auth0 OAuth provider. Args: config_url: Auth0 config URL client_id: Auth0 application client id

Initialize Azure JWT verifier. Args: client_id: Azure application (client) ID from your App registration tenant_id: A

Initialize the Clerk token verifier. Args: domain: Clerk instance domain (e.g., "saving-primate-16.clerk.accounts.dev")

Initialize PropelAuth provider. Args: auth_url: Your PropelAuth Auth URL (from the Backend Integration page) introspe

Initialize the Keycloak auth provider. Args: realm_url: Keycloak realm URL (e.g., "https://keycloak.example.com/realms/myrealm")

Initialize the Google token verifier. Args: required_scopes: Required OAuth scopes (e.g., ['openid', 'https://www.googleapis.com/