Primitives, Capabilities & Utilities in MCP
15%
Cancellation (Client & Server Side)
The Model Context Protocol allows both clients and servers to stop the execution of a request that is currently in progress. This is handled via a one-way notification (JSON-RPC notification), meaning no acknowledgment or response is required for the cancellation message itself.
When a party decides to terminate a request it previously issued, it sends a notifications/cancelled message.
{
"jsonrpc": "2.0",
"method": "notifications/cancelled",
"params":Practical MCP with FastMCP & LangChain
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