Source note · Model Context Protocol transports compared
In MCP revision 2025-06-18, the body of a Streamable HTTP POST MUST be a single JSON-RPC request, notification or response; the batching alternatives printed in revision 2025-03-26 are absent.
Checked 2026-09-30
- Vendor
- Model Context Protocol project
- Product
- MCP specification
- Subsystem
- Streamable HTTP transport
- Deployment
- remote-http
- Region
- not restricted
- Release range
- MCP revisions 2025-06-18 and 2025-11-25 (legacy)
- Checked
- 2026-09-30
Sources
- Transports - MCP specification revision 2025-06-18 — Model Context Protocol project · tier 1 standards and regulators · section Streamable HTTP, subsection Sending Messages to the Server, item 3
Cite this note
APA
WarmTransfer. (2026, September 30). Model Context Protocol transports compared: source note mcp-transport-differences-v2025-06-18-single-body. WarmTransfer. https://warmtransfer.net/knowledge/claims/mcp-transport-differences-v2025-06-18-single-body
BibTeX
@misc{warmtransfer-claim-mcp-transport-differences-v2025-06-18-single-body,
title = {Model Context Protocol transports compared: source note mcp-transport-differences-v2025-06-18-single-body},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/mcp-transport-differences-v2025-06-18-single-body},
note = {Source note mcp-transport-differences-v2025-06-18-single-body, checked 2026-09-30}
}