Model Context Protocol specification 2026-07-28, Caching

Publisher

Model Context Protocol project

URL

https://modelcontextprotocol.io/specification/2026-07-28/server/utilities/caching

Published

2026-07-28

Updated

unknown

Accessed

2026-09-05

HTTP status

200

License

MIT license; permitted under the specification license

Source notes citing this source

• The Caching page diagram draws the list_changed notification with the '-->>' arrow, whereas the Tools page diagram of the same specification revision draws it with the '--)' arrow. in context
• The 2026-07-28 Caching page carries a mermaid sequenceDiagram under Interaction with Notifications that works through a timeline: a tools/list result with ttlMs 300000 is used from cache at two minutes, re-fetched after expiry, and invalidated immediately by a list_changed notification. in context
• The Caching page's Freshness Calculation subsection contains a fenced code block with no language tag whose content is the single expression 'now < t_received + ttlMs'. in context
• The Model Context Protocol caching page states that a relevant notification received while a cached response is still fresh invalidates that cached response, which should then be considered immediately stale. in context
• The caching page's freshness formula survives only as its first token in this corpus's extracted text and must be read from the raw payload. field report in context
• The caching page enumerates 6 cacheable operations: server discovery, the tools list, the prompts list, the resources list, the resource templates list, and resource read. in context

Cite this source record

APA

WarmTransfer. (2026, July 28). Model Context Protocol specification 2026-07-28, Caching. WarmTransfer. https://warmtransfer.net/knowledge/sources/mcp-spec-2026-07-28-caching

BibTeX

@misc{warmtransfer-mcp-spec-2026-07-28-caching,
  title  = {Model Context Protocol specification 2026-07-28, Caching},
  author = {{WarmTransfer}},
  year   = {2026},
  url    = {https://warmtransfer.net/knowledge/sources/mcp-spec-2026-07-28-caching},
  note   = {Model Context Protocol project, accessed 2026-09-05}
}