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Mailrith Email Marketing
com.mailrith/mailrith in the official MCP registry.
Endpoint https://api.mailrith.com/mcp. Source: github.com/anrawool/mailrith-agent-platform.
The registry describes it as: Manage Subscribers, Broadcasts, Sequences, Automations, and reporting in Mailrith.
We read its 55 tools on 2026-10-27. Nothing in them matched our tool-poisoning rules. It also sets server instructions, text a client puts in front of the model on connect; those were read too.
A clean read means these rules found nothing, not that the server is harmless. A server can change its tools at any time, which is why the index reads it again every week.
Tools it advertises
discovery_get_capabilities workspace_get sender_identities_list sender_identities_get analytics_create_report analytics_get_report subscribers_list subscribers_get subscribers_upsert subscribers_update subscribers_update_status subscribers_add_tag subscribers_remove_tag subscribers_add_to_sequence subscribers_remove_from_sequence tags_list tags_get tags_create custom_fields_list custom_fields_get segments_list segments_get segments_preview broadcasts_list broadcasts_create broadcasts_get broadcasts_update broadcasts_preflight broadcasts_send_test broadcasts_schedule broadcasts_unschedule broadcasts_send broadcasts_cancel broadcasts_get_send_progress sequences_list sequences_create sequences_get sequences_update sequences_preflight sequences_preview_journey sequences_send_test sequences_update_status automations_list automations_create automations_get automations_update automations_preflight automations_preview_journey automations_send_test automations_update_status email_templates_list email_templates_create email_templates_get email_templates_preview email_templates_update
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[](https://lazaretto.dev/mcp-registry/com-mailrith-mailrith)How this was checked
Lazaretto connects to the endpoint the way any MCP client does, asks the server to introduce itself and list its tools, and reads every name, description, parameter schema and server instruction for tool poisoning: hidden directive blocks, orders to read local secrets, parameters built to carry secrets or the conversation out, orders that redirect another server's tools, and invisible characters. It never calls a tool. What we found across the registry.
To run the same check every time Claude Code adds a server, install the free lazaretto-guard plugin. Browse every server in the index.
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