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Summer
ai.gosummer/summer in the official MCP registry.
Endpoint https://api.gosummer.ai/mcp. Source: github.com/compound-technologies/summer-mcp.
The registry describes it as: Telehealth support for Claude, Codex and Cursor: investigate cases and connect your tools.
We read its 65 tools on 2026-10-21. 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
summer_account_me summer_account_companies_list summer_account_access_request_read summer_account_access_request_submit summer_account_connections_list summer_account_connections_revoke summer_guides_get summer_guides_save summer_guides_articles_get summer_guides_articles_save summer_guides_preview summer_guides_authoring summer_guides_publish summer_guides_unpublish summer_guides_history summer_guides_hosting_get summer_guides_hosting_save summer_guides_hosting_verify summer_assets_list summer_assets_get summer_assets_uploads_create summer_assets_uploads_complete summer_assets_edit summer_company_capabilities summer_company_setup_status summer_capability_checks_list summer_capability_checks_get summer_capability_checks_save summer_capability_checks_report summer_capability_checks_test summer_company_settings_read summer_company_settings_update summer_integrations_list summer_integrations_save summer_credentials_list summer_credentials_set summer_knowledge_list summer_knowledge_create summer_knowledge_get summer_knowledge_history summer_knowledge_edit summer_messenger_installations_list summer_messenger_installations_create summer_messenger_installations_update summer_messenger_installations_rotate_key summer_messenger_assistant_read summer_messenger_leads_list summer_messenger_assistant_update summer_messenger_voice_read summer_messenger_voice_update summer_company_team_read summer_messenger_conversations_assistant summer_verification_run summer_cases_list summer_cases_get summer_cases_attachment summer_investigations_list summer_investigations_request summer_actions_prepare summer_events_list and 5 more
Run this server? Show the check in your README
The badge reflects the latest weekly read: 
[](https://lazaretto.dev/mcp-registry/ai-gosummer-summer)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.