// COMPARISON
MCP vs ACP: Which Agent Protocol Should You Use?
MCP (Model Context Protocol) and ACP (Agent Communication Protocol) are competing approaches to agent communication. MCP uses JSON-RPC for deep tool integration, while ACP uses REST for standardized, API-first agent messaging. Each has distinct trade-offs.
02 Detailed Breakdown
Architecture
MCP uses a client-server model with JSON-RPC for bi-directional communication. ACP uses REST endpoints defined by OpenAPI specs, making it more familiar to web developers. MCP enables richer real-time communication; ACP is simpler to implement.
Use Cases
Use MCP for agents that need deep, real-time tool integration — code editors, database querying, file manipulation. Use ACP for agents that communicate via standardized HTTP messages — task delegation, status reporting, webhook callbacks. ACP's REST model is easier to deploy behind existing API gateways.
Maturity
MCP is production-ready with broad adoption since 2024. ACP is still in beta with a smaller ecosystem. For production deployments today, MCP is the safer choice. ACP's simpler REST model may appeal to teams with existing API infrastructure.
// VERDICT
Winner: MCP
MCP wins for production readiness, deep tool integration, and broad adoption. ACP is promising for teams wanting REST-based simplicity but is still in beta. For new projects today, MCP is the recommended choice.
03 Frequently Asked Questions
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