Source note · Model Context Protocol transports compared
In MCP revision 2026-07-28 the server MUST send notifications/subscriptions/acknowledged before any other notification on a subscription; on stdio this ordering is defined per subscription ID rather than per channel, so messages belonging to other subscriptions MAY be interleaved before it.
Checked 2026-09-30
- Vendor
- Model Context Protocol project
- Product
- MCP specification
- Subsystem
- subscriptions
- Deployment
- local-subprocess, remote-http
- Region
- not restricted
- Release range
- MCP revision 2026-07-28
- Checked
- 2026-09-30
Sources
- Model Context Protocol specification 2026-07-28, Subscriptions — Model Context Protocol project · tier 1 standards and regulators · section Acknowledgment, first paragraph
Cite this note
APA
WarmTransfer. (2026, September 30). Model Context Protocol transports compared: source note mcp-transport-differences-stdio-ack-ordering. WarmTransfer. https://warmtransfer.net/knowledge/claims/mcp-transport-differences-stdio-ack-ordering
BibTeX
@misc{warmtransfer-claim-mcp-transport-differences-stdio-ack-ordering,
title = {Model Context Protocol transports compared: source note mcp-transport-differences-stdio-ack-ordering},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/mcp-transport-differences-stdio-ack-ordering},
note = {Source note mcp-transport-differences-stdio-ack-ordering, checked 2026-09-30}
}