One read of Model Context Protocolmcp-20260820T233715Z

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Captured 20 Aug 2026 23:37 UTC

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from line 117

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118118* The **client** cancels it — close the SSE stream (HTTP) or send

119119 `notifications/cancelled` referencing the `subscriptions/listen` request ID (stdio).

120* The **server** tears it down (e.g., during shutdown) — it **SHOULD** send the

121 empty `subscriptions/listen` response to signal a graceful end (see

120* The **server** tears it down (e.g., during shutdown) — it **SHOULD** send a

121 successful `subscriptions/listen` response to signal a graceful end (see

122122 [Graceful Closure](#graceful-closure)), then close the stream.

123123* The underlying transport closes (HTTP timeout, TCP disconnect, stdio process

124124 exit).

from line 127

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128128When the server ends a subscription on its own initiative (for example, during

129129shutdown), it **SHOULD** respond to the original `subscriptions/listen` request

130with an empty result before closing the stream. This is the JSON-RPC response to

131the long-lived request, correlated by its `id`, and signals that the subscription

132ended gracefully — as opposed to an abrupt transport drop, which carries no

133response.

130with a completion result before closing the stream. The result carries no

131method-specific data beyond the standard result fields and subscription

132metadata. This is the JSON-RPC response to the long-lived request, correlated by

133its `id`, and signals that the subscription ended gracefully — as opposed to an

134abrupt transport drop, which carries no response.

134135

135136```json theme={null}

136137{