Source note · Model Context Protocol transports compared
A Streamable HTTP server that supports only MCP revision 2026-07-28 SHOULD respond to an HTTP GET or DELETE on the MCP endpoint with 405 Method Not Allowed, SHOULD ignore an Mcp-Session-Id header without minting or echoing session IDs, and SHOULD ignore a Last-Event-ID header.
Checked 2026-09-30
- Vendor
- Model Context Protocol project
- Product
- MCP specification
- Subsystem
- backward compatibility
- Deployment
- remote-http
- Region
- not restricted
- Release range
- MCP revision 2026-07-28
- Checked
- 2026-09-30
Sources
- Model Context Protocol specification 2026-07-28, Streamable HTTP — Model Context Protocol project · tier 1 standards and regulators · section Backward Compatibility, subsection Earlier Streamable HTTP Revisions
Cite this note
APA
WarmTransfer. (2026, September 30). Model Context Protocol transports compared: source note mcp-transport-differences-http-legacy-traffic. WarmTransfer. https://warmtransfer.net/knowledge/claims/mcp-transport-differences-http-legacy-traffic
BibTeX
@misc{warmtransfer-claim-mcp-transport-differences-http-legacy-traffic,
title = {Model Context Protocol transports compared: source note mcp-transport-differences-http-legacy-traffic},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/mcp-transport-differences-http-legacy-traffic},
note = {Source note mcp-transport-differences-http-legacy-traffic, checked 2026-09-30}
}