0.9.0

Issues

• [Client] Check HTTP status codes in HttpTransport

  Client
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  modelcontextprotocol/php-sdk#425·ez-lbz opened Aug 16, 2026 · Updated Sep 7, 2026
  2

• [Client] Resume interrupted SSE streams

  Client
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  modelcontextprotocol/php-sdk#463·wWzZb opened Aug 19, 2026 · Updated Oct 7, 2026

• [Client] Fail fast when the stdio server process exits before responding

  Clientenhancement
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  modelcontextprotocol/php-sdk#514·ousamabenyounes opened Sep 26, 2026 · Updated Oct 8, 2026
  1

• [Client] Invalidate expired HTTP sessions

  bugClient
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  modelcontextprotocol/php-sdk#560·ineersa opened Oct 8, 2026 · Updated Oct 10, 2026
  3

• [Client] Fix onProgress receiving another request's progress

  bugClient
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  modelcontextprotocol/php-sdk#565·chr-hertel opened Oct 10, 2026 · Updated Oct 10, 2026

• [Client] Throw TimeoutException on request timeout and cancel the request

  bugClient
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  modelcontextprotocol/php-sdk#567·chr-hertel opened Oct 10, 2026 · Updated Oct 10, 2026

• [Server] Stop the handshake-era SSE loop once the client disconnected

  bugServer
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  modelcontextprotocol/php-sdk#569·chr-hertel opened Oct 10, 2026 · Updated Oct 10, 2026

• [Server] Stop a deleted session from coming back when an in-flight request saves it

  bugServer
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  modelcontextprotocol/php-sdk#568·chr-hertel opened Oct 10, 2026 · Updated Oct 10, 2026

• [Server] Answer an unreachable session store with 503 instead of 404

  bugServer
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  modelcontextprotocol/php-sdk#570·chr-hertel opened Oct 10, 2026 · Updated Oct 10, 2026

• [Docs] Bring the docs back in sync with the code

  documentation
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  modelcontextprotocol/php-sdk#566·chr-hertel opened Oct 10, 2026 · Updated Oct 10, 2026
  2

• [Server] Apply the client-set log level in ClientGateway::log()

  breaking changebugServer
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  modelcontextprotocol/php-sdk#571·chr-hertel opened Oct 10, 2026 · Updated Oct 10, 2026

• [Server] Stop concurrent requests from overwriting each other's session changes

  bugServer
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  modelcontextprotocol/php-sdk#572·chr-hertel opened Oct 10, 2026 · Updated Oct 10, 2026

• [Client] Mark the client disconnected when the stdio server exits

  bugClient
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  modelcontextprotocol/php-sdk#573·chr-hertel opened Oct 10, 2026 · Updated Oct 10, 2026

• [Server] Fix memory growing with every tools/call

  bugServer
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  modelcontextprotocol/php-sdk#574·chr-hertel opened Oct 10, 2026 · Updated Oct 10, 2026

• [Server] Fix stdio answering a request on an idle connection only after ~50ms

  bugServer
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  modelcontextprotocol/php-sdk#575·chr-hertel opened Oct 10, 2026 · Updated Oct 10, 2026

• [Client] Fail a request at once when its response ends unanswered

  bugClient
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  modelcontextprotocol/php-sdk#577·chr-hertel opened Oct 10, 2026 · Updated Oct 10, 2026

• [Client] Fix connecting to a server with an empty serverInfo.version

  bugClientSchema
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  modelcontextprotocol/php-sdk#579·chr-hertel opened Oct 10, 2026 · Updated Oct 10, 2026

• [Server] Resume every suspended fiber on stdio

  breaking changebugServer
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  modelcontextprotocol/php-sdk#580·chr-hertel opened Oct 10, 2026 · Updated Oct 10, 2026

• [Server] Fix parallel elicitations on one session getting each other's answers

  bugServer
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  modelcontextprotocol/php-sdk#581·chr-hertel opened Oct 10, 2026 · Updated Oct 10, 2026

• [Server] Fix CORS preflight behind authorization

  bugServer
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  modelcontextprotocol/php-sdk#576·chr-hertel opened Oct 10, 2026 · Updated Oct 10, 2026

• [Server] Add an opt-in per-session lock

  bugServer
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  modelcontextprotocol/php-sdk#582·chr-hertel opened Oct 10, 2026 · Updated Oct 10, 2026