{"generated_at":"2026-10-14T20:07:22+00:00","item":{"added_at":"2026-08-05","analysis_method":"independent_manual_review_2026-10-10","assessment_status":"provisional","auth_posture":"auth_required","category":"Web Connector","confidence":"medium","description":"SenderKit sends email, SMS, push, and web-push messages. Manage templates, provision inbound email, and inspect delivery or received mail. Test mode simulates sends; live mode sends real messages from your workspace.","did":"fe429924-a88a-41dc-a7f6-b71cebe8883d","documentation_url":"https://docs.senderkit.com/","editorial_description":{"extended_description":"Use templates or inline content, inspect scheduled messages, and cancel queued sends. Tools create or delete inbound addresses and domains and retrieve incoming mail.","schema_version":1,"summary":"SenderKit sends email, SMS, push, and web-push messages.\nManage templates, provision inbound email, and inspect delivery or received mail.\nTest mode simulates sends; live mode sends real messages from your workspace."},"homepage_url":"","icon":"","id":"fe429924-a88a-41dc-a7f6-b71cebe8883d","installs":0,"last_scanned":"","license":"","long_description":"Use templates or inline content, inspect scheduled messages, and cancel queued sends. Tools create or delete inbound addresses and domains and retrieve incoming mail.","manual_assessment":"high","manual_review":{"all_findings":[{"evidence":"The listing says one API sends transactional email, SMS, push and web-push; explicit send tools are present.","reasoning":"These tools communicate to external users as the connected application/agent.","risk_type":"messaging_as_user","severity":"high","title":"Email, SMS, push, and web-push messages can be sent","triggering_tools_or_skills":["senderkit_send","senderkit_send_raw"]},{"evidence":"The connector administers receive-domain and receive-address routing.","reasoning":"Messaging identity/routing configuration is a privileged account action.","risk_type":"credential_admin","severity":"high","title":"Inbound domains and addresses can be created or deleted","triggering_tools_or_skills":["senderkit_inbound_domains_create","senderkit_inbound_domains_delete","senderkit_inbound_addresses_create","senderkit_inbound_addresses_delete"]},{"evidence":"Named tools cancel a message and delete domain/address resources.","reasoning":"These actions can stop communications or break inbound delivery.","risk_type":"data_deletion","severity":"high","title":"Queued messages and inbound routing can be cancelled or deleted","triggering_tools_or_skills":["senderkit_cancel_message","senderkit_inbound_domains_delete","senderkit_inbound_addresses_delete"]},{"evidence":"The connector persists and rewrites templates used for future communications.","reasoning":"Template changes affect automated outbound content.","risk_type":"data_modification","severity":"medium","title":"Message templates can be created or regenerated","triggering_tools_or_skills":["senderkit_templates_create","senderkit_templates_regenerate"]},{"evidence":"Inbound mail is authored by external senders and can act on autonomous agents.","reasoning":"This is a direct prompt-injection surface.","risk_type":"prompt_injection_exposure","severity":"low","title":"Inbound email enters model context","triggering_tools_or_skills":["senderkit_inbound_messages_get","senderkit_inbound_messages_list"]}],"assessment_status":"provisional","auth_and_scopes":"Authentication grants SenderKit multi-channel send, inbound message, domain/address, template, and cancellation permissions; exact tenant roles are not stated.","blocked_missing_evidence":null,"confidence":"medium","displayed_risk":"high","evidence_completeness":"partial","manual_overall_risk":"high","official_sources":[{"accessed_at":"2026-10-10T20:24:37Z","url_or_path":"plutosecurity/plutonium@b749c8dc43536c794409be9805edd48063f045e2:app/data/conn/claudesec/fe429924-a88a-41dc-a7f6-b71cebe8883d.json","what_it_proves":"Candidate PR #125 record identity (name \"SenderKit\", publisher, type web_connector) and 18 stored tool names; no tool descriptions stored"},{"accessed_at":"2026-09-22T10:46:07Z","url_or_path":"https://api.anthropic.com/api/directory/servers?verified_tier=anthropic,partner,community (snapshot claude-directory-all-tiers-2026-09-22.json)","what_it_proves":"Official Claude Directory listing https://claude.ai/directory/fe429924-a88a-41dc-a7f6-b71cebe8883d: complete tool_names inventory (18 tools), remote streamable-http endpoint https://mcp.senderkit.com/, auth_posture auth_required, directory tier community"}],"primary_reason":"SenderKit can send across multiple channels and administer/delete inbound messaging identities.","provisional_risk":null,"publication_recommendation":"accept","requires_runtime_verification":true,"review_key":"claude:fe429924-a88a-41dc-a7f6-b71cebe8883d","reviewed_at":"2026-10-10","reviewer_notes":"Reviewed all 18 tools; recipient restrictions, raw-send headers, and cancellation timing require runtime verification.","risk_domains":{"arbitrary_network_access":"false","authz_ambiguity":"false","browser_control":"false","credential_or_admin_actions":"true","deletes_data":"true","deployment_or_infrastructure":"false","dynamic_hidden_actions":"false","filesystem_or_repo_access":"false","forwards_data_to_third_party":"true","modifies_data":"true","persistent_credentials":"true","prompt_injection_exposure":"true","provenance_uncertainty":"true","reads_private_data":"true","runs_code_or_queries":"false","sends_messages_as_user":"true","spends_or_moves_money":"false"},"tools_or_skills_reviewed":18,"tools_or_skills_total":18},"name":"SenderKit","needs_runtime_verification":true,"plutonium_url":"https://plutonium.pluto.security/detail.html?planet=claudesec&did=fe429924-a88a-41dc-a7f6-b71cebe8883d&utm_source=plutonium_analysis_skill&utm_medium=claude_skill&utm_campaign=connector_risk_assessment","privacy_policy_url":"https://www.senderkit.com/privacy","provisional_risk":null,"publication_recommendation":"accept","publisher":"SenderKit","publisher_url":"https://www.senderkit.com/","remote_url":"https://mcp.senderkit.com/","repository_url":"","risk":"high","risk_severity":"high","security_risks":[{"description":"This connector can publish or send messages and content using the connected identity. Review findings: These tools communicate to external users as the connected application/agent.","evidence":"Email, SMS, push, and web-push messages can be sent: The listing says one API sends transactional email, SMS, push and web-push; explicit send tools are present.","manual_risk_type":"messaging_as_user","remediation":{"block_tool_categories":["sends_externally"],"steps":["Require review before messages, posts, or publications are sent.","Restrict delivery to test or internal recipients where possible."]},"risk_type":"sends_messages_as_you","severity":"high","title":"Email, SMS, push, and web-push messages can be sent","triggering_tools":["senderkit_send","senderkit_send_raw"]},{"description":"This connector can create, update, configure, or otherwise change connected resources. Review findings: Messaging identity/routing configuration is a privileged account action.; Template changes affect automated outbound content.","evidence":"Inbound domains and addresses can be created or deleted: The connector administers receive-domain and receive-address routing. | Message templates can be created or regenerated: The connector persists and rewrites templates used for future communications.","manual_risk_type":"credential_admin,data_modification","remediation":{"block_tool_categories":["state_change"],"steps":["Use a test account or sandbox before allowing changes to production data.","Grant only the write permissions required for the intended workflow.","Require human confirmation for consequential state changes."]},"risk_type":"modifies_data","severity":"high","title":"Can change connected resources","triggering_tools":["senderkit_inbound_domains_create","senderkit_inbound_domains_delete","senderkit_inbound_addresses_create","senderkit_inbound_addresses_delete","senderkit_templates_create","senderkit_templates_regenerate"]},{"description":"This connector can permanently remove data or resources. Review findings: These actions can stop communications or break inbound delivery.","evidence":"Queued messages and inbound routing can be cancelled or deleted: Named tools cancel a message and delete domain/address resources.","manual_risk_type":"data_deletion","remediation":{"block_tool_categories":["destructive"],"steps":["Disable destructive tools unless deletion is an explicit workflow requirement.","Require human confirmation and verified backups before deletion."]},"risk_type":"deletes_data","severity":"high","title":"Queued messages and inbound routing can be cancelled or deleted","triggering_tools":["senderkit_cancel_message","senderkit_inbound_domains_delete","senderkit_inbound_addresses_delete"]}],"signature_status":"unknown","source_code_reviewed":false,"support_url":"support@senderkit.com","tags":["accesses_messaging","deletes_data","modifies_data","network_access","oauth_required","sends_messages_as_you","web_connector"],"tools":[{"description":"","name":"senderkit_cancel_message","risk":{"category":"destructive","level":"high","recommendation":"Follow the connector-level remediation and require approval for consequential actions.","why":"This connector can permanently remove data or resources. Review findings: These actions can stop communications or break inbound delivery."}},{"description":"","name":"senderkit_context"},{"description":"","name":"senderkit_inbound_addresses_create","risk":{"category":"state_change","level":"high","recommendation":"Follow the connector-level remediation and require approval for consequential actions.","why":"This connector can create, update, configure, or otherwise change connected resources. Review findings: Messaging identity/routing configuration is a privileged account action.; Template changes affect automated outbound content."}},{"description":"","name":"senderkit_inbound_addresses_delete","risk":{"category":"destructive","level":"high","recommendation":"Follow the connector-level remediation and require approval for consequential actions.","why":"This connector can permanently remove data or resources. Review findings: These actions can stop communications or break inbound delivery."}},{"description":"","name":"senderkit_inbound_addresses_list"},{"description":"","name":"senderkit_inbound_domains_create","risk":{"category":"state_change","level":"high","recommendation":"Follow the connector-level remediation and require approval for consequential actions.","why":"This connector can create, update, configure, or otherwise change connected resources. Review findings: Messaging identity/routing configuration is a privileged account action.; Template changes affect automated outbound content."}},{"description":"","name":"senderkit_inbound_domains_delete","risk":{"category":"destructive","level":"high","recommendation":"Follow the connector-level remediation and require approval for consequential actions.","why":"This connector can permanently remove data or resources. Review findings: These actions can stop communications or break inbound delivery."}},{"description":"","name":"senderkit_inbound_domains_list"},{"description":"","name":"senderkit_inbound_messages_get"},{"description":"","name":"senderkit_inbound_messages_list"},{"description":"","name":"senderkit_messages_get"},{"description":"","name":"senderkit_messages_list"},{"description":"","name":"senderkit_send","risk":{"category":"sends_externally","level":"high","recommendation":"Follow the connector-level remediation and require approval for consequential actions.","why":"This connector can publish or send messages and content using the connected identity. Review findings: These tools communicate to external users as the connected application/agent."}},{"description":"","name":"senderkit_send_raw","risk":{"category":"sends_externally","level":"high","recommendation":"Follow the connector-level remediation and require approval for consequential actions.","why":"This connector can publish or send messages and content using the connected identity. Review findings: These tools communicate to external users as the connected application/agent."}},{"description":"","name":"senderkit_templates_create","risk":{"category":"state_change","level":"high","recommendation":"Follow the connector-level remediation and require approval for consequential actions.","why":"This connector can create, update, configure, or otherwise change connected resources. Review findings: Messaging identity/routing configuration is a privileged account action.; Template changes affect automated outbound content."}},{"description":"","name":"senderkit_templates_get"},{"description":"","name":"senderkit_templates_list"},{"description":"","name":"senderkit_templates_regenerate","risk":{"category":"state_change","level":"high","recommendation":"Follow the connector-level remediation and require approval for consequential actions.","why":"This connector can create, update, configure, or otherwise change connected resources. Review findings: Messaging identity/routing configuration is a privileged account action.; Template changes affect automated outbound content."}}],"tools_count":18,"transport":"streamable-http","type":"web_connector","url":"https://claude.ai/directory/fe429924-a88a-41dc-a7f6-b71cebe8883d","uuid":"013dc90e-0093-55a2-a780-5f0ac5397437","verification_tier":"community","version":""},"query_key":"senderkit","schema_version":1,"status":"match"}