For an in-memory cache, Redis is the most fitting option: it is an in-memory data store that serves as a cache, with an SDK and MCP server 1, and Redis LangCache offers semantic caching of LLM responses via its SDK or REST API 111. Memcached is a distributed memory object cache aimed at speeding up dynamic applications by reducing database load 3, and Ccache is a compiler cache rather than an application cache 7.
- 1
Redisredis.ioverified and signed
An in-memory data store for real-time data that can serve as a cache; its SDK and MCP server are the official doors, and its key-value store action covers direct cache use 111.
official:MCP server · Redis MCP ServerSDK · redisskill · redis-coreSDK · redis+38 community tools built for it
for agents: redis-semantic-cache · iris-development · key-value-store
- 2
- 3
async-stdasync.rswebsite read, tools not yet checked
A Rust library for async programming, not a cache; it is listed only as a poor fit for an in-memory cache request.
+32 community tools built for it
Sources
- 1Redis - Real-time data for agents & appsredis.io · read 2026-10-29
- 3memcached - a distributed memory object caching systemmemcached.org · read 2026-10-29
- 6async-stdasync.rs · read 2026-10-29
- 7Ccache — Compiler cacheccache.dev · read 2026-10-29
- 11redis-semantic-cache: declares "redis-semantic-cache" (the record we read and signed)unfragile.ai · read 2026-10-24
For agents: the 10 actions behind this answer
redis-semantic-cache · redis-semantic-cache verified and signed
Redis LangCache guidance for semantic caching of LLM responses on Redis Cloud — calling search/set via the SDK or REST API, tuning the similarity threshold, separating caches per task type, and filtering with custom attributes. Use when caching LLM completions or RAG answers to cut API cost and late
propcache · propcache verified and signed
lru_cache · async-lru verified and signed
· aio-libs Aiocache website read, tools not yet checked
· memcached website read, tools not yet checked
memcached
· aio-libs Aiobotocore website read, tools not yet checked
CreateApiCache · AWS AppSync verified and signed
Creates a cache for the GraphQL API.
numpy · dask verified and signed
· async-std website read, tools not yet checked
A Rust library for easy and understandable async programming
· Ccache website read, tools not yet checked
Labels are the instruments' verdict and are never changed by ranking. Agents and robots get this same answer as JSON at /api/v1/find?q=…&answer=1 and through the MCP server.