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AdButler
com.adbutler/mcp-server in the official MCP registry.
Endpoint https://mcp.adbutler.com/mcp. Source: github.com/adbutler/mcp-server.
The registry describes it as: Manage AdButler campaigns, zones, ad items, VAST, and reports from Claude, ChatGPT, and Cursor.
We read its 200 tools on 2026-10-22. Nothing in them matched our tool-poisoning rules.
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
list_advertisers get_advertiser create_advertiser update_advertiser delete_advertiser archive_advertiser list_archived_advertisers get_archived_advertiser unarchive_advertiser list_all_campaigns list_campaigns get_campaign create_campaign update_campaign delete_campaign archive_campaign list_archived_campaigns get_archived_campaign delete_archived_campaign unarchive_campaign get_campaign_conversion_tag get_campaign_eligible_zones campaign_bulk_create_catalog_ad_items campaign_bulk_delete_catalog_ad_items list_campaign_assignments get_campaign_assignment create_campaign_assignment update_campaign_assignment delete_campaign_assignment list_channels get_channel create_channel update_channel delete_channel archive_channel list_archived_channels get_archived_channel delete_archived_channel unarchive_channel list_channel_zone_assignments get_channel_zone_assignment create_channel_zone_assignment delete_channel_zone_assignment list_all_zones list_zones get_zone create_zone update_zone delete_zone get_zone_tag get_zone_conversion_tag generate_bulk_zone_tags archive_zone list_archived_zones get_archived_zone unarchive_zone list_email_zones get_email_zone create_email_zone update_email_zone and 140 more
Run this server? Show the check in your README
The badge reflects the latest weekly read: 
[](https://lazaretto.dev/mcp-registry/com-adbutler-mcp-server)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.