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fastmcp.server.middleware.rate_limiting

Rate limiting middleware for protecting FastMCP servers from abuse.

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Classes

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RateLimitError

Error raised when rate limit is exceeded.

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TokenBucketRateLimiter

Token bucket implementation for rate limiting.

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SlidingWindowRateLimiter

Sliding window rate limiter implementation.

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RateLimitingMiddleware

Middleware that implements rate limiting to prevent server abuse.

Uses a token bucket algorithm by default, allowing for burst traffic while maintaining a sustainable long-term rate.

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SlidingWindowRateLimitingMiddleware

Middleware that implements sliding window rate limiting.

Uses a sliding window approach which provides more precise rate limiting but uses more memory to track individual request timestamps.