Amazon ElastiCache for Memcached MCP Server: Setup for Claude, Cursor and Other Apps

• Reads the value stored under a key

  Returns the value for one key, or says the key was not found.

  Try: “What is stored under the key session:42?”

  Network · cache_get

• Reads a value along with its CAS token

  Returns the value and a CAS token, which you need for a safe check-and-set update.

  Try: “Get session:42 with its CAS token.”

  Network · cache_gets

• Reads several keys at once

  Returns the values for a list of keys in one call.

  Try: “Get the values for user:1, user:2 and user:3.”

  Network · cache_get_many

• Reads several keys at once (alias)

  Does the same as the get-many tool and exists as an alias.

  Try: “Fetch these five keys in one go.”

  Network · cache_get_multi

• Shows cache server statistics

  Returns the server's statistics, optionally for one stats group.

  Try: “Show me the Memcached stats, including hit rate.”

  Network · cache_stats

• Shows the Memcached server version

  Returns the version string of the cache server.

  Try: “Which Memcached version is this?”

  Network · cache_version

• Stores a value under a key

  Writes a value, replacing any old one, with an optional expiry in seconds.

  Try: “Set feature:beta to on and let it expire in an hour.”

  Write · cache_set

• Stores several key/value pairs at once

  Writes a whole set of keys in one call, with an optional expiry.

  Try: “Store these three config values in the cache.”

  Write · cache_set_many

• Stores several key/value pairs at once (alias)

  Does the same as the set-many tool and exists as an alias.

  Try: “Write these key/value pairs to the cache.”

  Write · cache_set_multi

• Stores a value only if the key is new

  Writes the value only when the key does not exist yet, so it never overwrites.

  Try: “Add lock:report only if nobody holds it.”

  Write · cache_add

• Replaces a value only if the key exists

  Overwrites an existing key and does nothing if the key is missing.

  Try: “Replace the value of config:theme with dark.”

  Write · cache_replace

• Updates a value only if nobody changed it

  Writes only if the CAS token still matches, which protects against overwriting a newer change.

  Try: “Update counter:7 using the CAS token you just fetched.”

  Write · cache_cas

• Adds text to the end of a stored value

  Appends a string to an existing value.

  Try: “Append ',admin' to the roles of user:9.”

  Write · cache_append

• Adds text to the start of a stored value

  Prepends a string to an existing value.

  Try: “Prepend 'v2:' to the stored version tag.”

  Write · cache_prepend

• Adds to a counter

  Increases a numeric value by an amount, 1 by default.

  Try: “Increment page:views by 1.”

  Write · cache_incr

• Subtracts from a counter

  Decreases a numeric value by an amount, 1 by default.

  Try: “Decrement stock:sku-12 by 2.”

  Write · cache_decr

• Changes when a key expires

  Updates the expiry time of a key without changing its value.

  Try: “Keep session:42 alive for another 30 minutes.”

  Write · cache_touch

• Deletes one key

  Removes a key and its value from the cache.

  Try: “Delete the key session:42.”

  Delete · cache_delete

• Deletes several keys at once

  Removes a list of keys in one call.

  Try: “Delete all keys for user 17: user:17:a and user:17:b.”

  Delete · cache_delete_many

• Deletes several keys at once (alias)

  Does the same as the delete-many tool and exists as an alias.

  Try: “Remove these keys from the cache.”

  Delete · cache_delete_multi

• Erases the whole cache

  Clears every entry in the cache, either now or after a delay in seconds. Every key is gone afterwards.

  Try: “Flush the entire cache.”

  Delete · cache_flush_all

• Closes the connection to the cache server

  Ends the session with the cache server. It changes no data.

  Try: “Close the connection to the cache.”

  Network · cache_quit

Watch out for

• It can erase the whole cache

  One tool flushes every key and others delete keys. Start the server with the readonly flag unless you need writes. github.com

• Cached values go to your AI provider

  Anything the assistant reads from the cache is sent to the model. Do not point it at a cache that holds sessions, tokens or personal data. github.com

• ElastiCache sits inside a private network

  Your computer needs a route to the cache. The README links a guide for connecting to ElastiCache. github.com

Security advisories