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How scalable is an MCP Server under load?

How scalable is an MCP Server under load?

It depends on the tool being wrapped. For example:
  • A lightweight lookup tool (like WHOIS) can handle 1000+ concurrent requests
  • A port scanner or PDF parser may need container isolation and queueing
Use async workers (Celery, FastAPI), message queues (RabbitMQ), and horizontal scaling via Docker Swarm/K8s for production workloads.
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