Castle MCP by usefulapi MCP Prompts
Castle MCP by usefulapi offers 6 prompts. A prompt is one you invoke yourself, rather than a tool the model calls on your behalf — each has its own page with the configuration for every client that can run it.
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getting_startedgetting started
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find_which_ips_devices_or_countries_drive_a_spikefind which ips devices or countries drive a spike
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review_recent_logins_sign_ups_and_their_risk_verdictsreview recent logins sign ups and their risk verdicts
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review_what_is_on_an_allow_or_deny_listreview what is on an allow or deny list
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add_an_entry_to_a_list_or_change_its_commentadd an entry to a list or change its comment
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archive_or_restore_a_list_entryarchive or restore a list entry
Read from the server itself, by connecting to it and calling prompts/list on 5 November 2026.
A listing does not declare its prompts, so asking is the only way to know them, and this
is what the server actually offers rather than what its listing claims. Names only are
stored; connect the server for each prompt's arguments.