ToolTrust
A2/100
Smithery

courier-courier-mcp

mcpsmithery

@Smithery

The official Model Context Protocol server for the Courier notification API. It gives AI agents full access to the Courier API — send messages, manage profiles, debug deliveries, configure lists, and more — through 60 tools backed by the @trycourier/courier Node SDK.

By Smithery | 93 findings | Scanned 7/4/2026 | tooltrust-scanner/v0.3.19

7 Low86 Info

Risk Summary

Safe With Normal Controls

Dep Visibility is the main signal, but overall risk remains within an acceptable range.

Potential impact: This finding indicates the tool should be reviewed before it is trusted.

Recommended action: No high-risk findings were detected in this scan, but you should still apply least-privilege defaults and rescan after changes.

Suggested policy: keep this tool behind manual approval, do not allow unattended runs, and re-scan after narrowing risky permissions.

Security Findings (93)

  • LowAS-011

    ℹ️Missing Rate-Limit / Timeout ×6

    tool performs network or execution operations but declares no rate-limit, timeout, or retry configuration

    update_audiencesend_messagesend_message_templatesend_message_to_listsend_message_to_list_templateupdate_translation

    Fix: Declare explicit rate-limit, timeout, and retry configuration for all network and execution tools. Implement exponential back-off and surface resource state to the calling agent.

  • LowAS-002

    ⚠️Excessive Permissions

    list_messages:input schema exposes 14 properties (threshold: 10)

    Fix: Tool requests broad permissions (exec/fs/network). Validate input parameters using Enums where possible, and restrict file system operations to explicit allowed directories.

  • InfoAS-014

    ℹ️Dependency Inventory Unavailable ×59

    Tool did not expose metadata.dependencies or repo_url, so supply-chain coverage is limited.

    get_audiencelist_audience_memberslist_audiencesupdate_audiencedelete_audienceget_audit_eventlist_audit_eventsgenerate_jwt_for_userinvoke_automation_templateinvoke_ad_hoc_automationcreate_brandget_brandlist_brandscreate_bulk_jobadd_bulk_usersrun_bulk_jobget_bulk_joblist_bulk_userscourier_installation_guidetrack_inbound_eventlist_listsget_listget_list_subscriberscreate_listsubscribe_user_to_listunsubscribe_user_from_listlist_messagesget_messageget_message_contentget_message_historycancel_messagelist_notificationsget_notification_contentget_notification_draft_contentget_user_profile_by_idcreate_or_merge_userreplace_profiledelete_profileget_user_list_subscriptionssubscribe_user_to_listsdelete_user_list_subscriptionssend_messagesend_message_templatesend_message_to_listsend_message_to_list_templateget_tenantcreate_or_update_tenantlist_tenantsdelete_tenantget_translationupdate_translationlist_user_push_tokensget_user_push_tokencreate_or_replace_user_push_tokenget_user_preferencesupdate_user_preference_topiclist_user_tenantsadd_user_to_tenantremove_user_from_tenant

    Fix: Review and remediate the identified issue.

  • InfoAS-002

    ⚠️Excessive Permissions ×25

    declared capabilities: code/command execution, filesystem access

    update_audience

    declared capabilities: filesystem access

    delete_audienceinvoke_automation_templateinvoke_ad_hoc_automationcreate_brandcreate_bulk_jobcreate_listget_user_profile_by_idcreate_or_merge_userreplace_profiledelete_profiledelete_user_list_subscriptionscreate_or_update_tenantdelete_tenantlist_user_push_tokensget_user_push_tokencreate_or_replace_user_push_tokenupdate_user_preference_topicadd_user_to_tenantremove_user_from_tenant

    declared capabilities: HTTP requests

    send_messagesend_message_templatesend_message_to_listsend_message_to_list_template

    declared capabilities: filesystem access, HTTP requests

    update_translation

    Fix: Tool requests broad permissions (exec/fs/network). Validate input parameters using Enums where possible, and restrict file system operations to explicit allowed directories.

  • InfoAS-010

    🔑Insecure Secret Handling ×2

    input parameter "token" accepts a credential (informational; not evidence of insecure handling)

    get_user_push_tokencreate_or_replace_user_push_token

    Fix: Avoid accepting raw credentials as input parameters. Use secret managers (e.g. 1Password CLI, AWS Secrets Manager) and ensure credentials are never logged or stored in agent traces.

Scan this tool yourself

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$ curl -sfL https://raw.githubusercontent.com/AgentSafe-AI/tooltrust-scanner/main/install.sh | bash
$ tooltrust-scanner scan --server "npx -y courier-courier-mcp"

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