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How is an MCP Server different from a traditional API gateway?

How is an MCP Server different from a traditional API gateway?

While traditional API gateways expose specific, callable endpoints, an MCP Server orchestrates sequences of tasks and decision logic, allowing AI agents to complete entire workflows dynamically.
Comparison API Gateway MCP Server
Target Developers AI Agents
Granularity Single API functions Complex workflows/tasks
Input Fixed parameters Flexible task schema (JSON)
Control Flow Client-controlled Agent-controlled
Example GET /scan-result?id=123 {“task”: “analyze_suspicious_email”, “email_id”: “123”}
In essence, APIs tell the system what to do, whereas MCP lets agents decide how to do it.
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