> ## Documentation Index > Fetch the complete documentation index at: https://docs.open.cx/llms.txt > Use this file to discover all available pages before exploring further. # Blocklist > Manage blocked contacts, email domains, and IP addresses. Use when stopping abusive or unwanted visitors from reaching your AI assistant. The Blocklist API lets you manage blocked contacts, blocked email domains, and blocked IP addresses. Blocked visitors are ignored by the AI — instead of an automated response they receive a short message explaining they cannot contact the company right now. You can customise that message per organization in **Settings → Autopilot**. ## Blocked Contacts Block individual contacts by email. Useful for stopping the AI from responding to abusive users, spam accounts, or internal test contacts. ## Blocked Domains Block entire email domains (e.g. "spam.com"). All contacts with emails on blocked domains will be ignored by the AI. Supports blocking multiple domains at once. ## Blocked IPs Block a single address (e.g. "203.0.113.7") or a whole CIDR range (e.g. "203.0.113.0/24"), IPv4 or IPv6. Useful against widget abuse where the visitor keeps creating throwaway contacts, so contact- and domain-blocking never bite. The address is resolved from Cloudflare's `CF-Connecting-IP` header, which cannot be forged by the client. A client IP is only observable on the web/widget channels; once a session has been seen from a blocked address the block continues to apply to that session on every channel. ## Available Endpoints List all blocked contacts Block a contact by email Check if a contact is blocked Remove a contact from the blocklist List all blocked domains Block one or more email domains Check if a domain or email is blocked Remove a domain from the blocklist List all blocked IPs and CIDR ranges Block one or more IP addresses or ranges Check if an IP is blocked Remove an IP from the blocklist