Castle MCP by usefulapi

Last 30 days

Uptime

100%

Response time

306 ms typical, 306 ms slowest 5%

Last check

3 h ago

Next check

in 4 h

How to call it

Add it to any MCP client that supports remote servers.

{
  "mcpServers": {
    "castle-mcp-by-usefulapi": {
      "type": "http",
      "url": "https://castle.usefulapi.io/mcp"
    }
  }
}

14 tools

• castle_get_events_schema

  List the event fields you can filter and group on, with their types. Read this first — the other query tools need real field names. Castle: GET /v1/events/schema.

• castle_search_events

  Query the security event stream — logins, registrations, transactions and their risk verdicts. Read-only despite being a POST: Castle takes the query in the body. Castle: POST /v1/events/query.

• castle_group_events

  Aggregate matching events by one or more fields — the fast way to see which IPs, devices or countries dominate a spike. Read-only despite being a POST. Castle: POST /v1/events/group.

• castle_search_lists

  Find the allow/deny lists defined in the environment. Read-only despite being a POST. Castle: POST /v1/lists/query.

• castle_get_list

  Fetch a single list with its primary and secondary field definitions. Castle: GET /v1/lists/{id}.

• castle_search_list_items

  Search the entries of one list — the blocked IPs, emails or device ids it holds. Read-only despite being a POST. Castle: POST /v1/lists/{list_id}/items/query.

• castle_count_list_items

  Count the entries in one list, with the same optional filters as the search. Read-only despite being a POST. Castle: POST /v1/lists/{list_id}/items/count.

• castle_get_list_item

  Fetch a single list entry — its value, who added it, the comment and its archive time. Castle: GET /v1/lists/{list_id}/items/{id}.

• castle_create_list

  Create a new allow or deny list. primary_field is the event field its entries match on, e.g. ip or user.email. Castle: POST /v1/lists.

• castle_update_list

  Rename a list or change its colour or description. Castle: PUT /v1/lists/{id}.

• castle_create_list_item

  Add an entry to a list — for example block an IP or an email. This changes live policy behaviour. Castle: POST /v1/lists/{list_id}/items.

• castle_update_list_item

  Change the comment on a list entry. Castle: PUT /v1/lists/{list_id}/items/{id}.

• castle_archive_list_item

  Archive a list entry so it stops matching. Reversible with castle_unarchive_list_item. Castle: DELETE /v1/lists/{list_id}/items/{id}/archive.

• castle_unarchive_list_item

  Restore a previously archived list entry so it matches again. Castle: PUT /v1/lists/{list_id}/items/{id}/unarchive.

Security scan

• No findings. We scan names, descriptions and tool definitions for hidden instructions and other prompt-injection patterns.

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