Source note · Model Context Protocol transports compared
On stdio in MCP revision 2026-07-28 all request metadata is carried inline in the JSON-RPC message body; there is no header layer.
Checked 2026-09-30
- Vendor
- Model Context Protocol project
- Product
- MCP specification
- Subsystem
- request metadata
- Deployment
- local-subprocess
- Region
- not restricted
- Release range
- MCP revision 2026-07-28
- Checked
- 2026-09-30
Sources
- stdio — Model Context Protocol (modelcontextprotocol.io) · tier 1 standards and regulators · section Request Metadata
Cite this note
APA
WarmTransfer. (2026, September 30). Model Context Protocol transports compared: source note mcp-transport-differences-stdio-no-header-layer. WarmTransfer. https://warmtransfer.net/knowledge/claims/mcp-transport-differences-stdio-no-header-layer
BibTeX
@misc{warmtransfer-claim-mcp-transport-differences-stdio-no-header-layer,
title = {Model Context Protocol transports compared: source note mcp-transport-differences-stdio-no-header-layer},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/mcp-transport-differences-stdio-no-header-layer},
note = {Source note mcp-transport-differences-stdio-no-header-layer, checked 2026-09-30}
}