PostgreSQL toolchain. Flow: setup_profile → action. setup_profile accepts credentials or connection_url plus optional TLS (ssl_mode, ssl_ca, ssl_cert, ssl_key, ssl_passphrase, ssl_servername, ssl_reject_unauthorized); secrets stored encrypted. Subsequent calls reuse profile_name: quick_query (adds LIMIT 100 if absent; supports params array for $ placeholders), show_tables, describe_table, sample_data, database_info, insert_data, update_data, delete_data, list_profiles.

SSH executor. setup_profile stores host credentials (password or PEM private_key with optional passphrase); data encrypted. list_profiles enumerates profiles, system_info returns collected facts, check_host validates reachability, execute runs one trimmed command (pipes/redirects allowed) sequentially per profile; no concurrent runs.

HTTP caller. Fields: action ∈ {get, post, put, delete, patch, check_api}, url (required), data (JSON body for mutating verbs), headers (string map), auth_token (prefixed into Authorization unless headers.Authorization supplied). Local URLs allowed. Responses are structured results or MCP errors.