# IP & CIDR Validator MCP for AI Agents AI Agent Connect > IP & CIDR Validator. It handles the heavy lifting of binary math for networking tasks. Instantly check if an IP belongs to a specific subnet, validate IPv4/IPv6 strings, and get network details like broadcast addresses. It's built for cybersecurity and NOC workflows where accuracy is non-negotiable. ## Overview - **Category:** loved-by-devs - **Price:** Free - **Endpoint:** https://edge.vinkius.com/vk_preview_zdbyTTH2RDB5CnFJWeDDjQO0bXcWFXg6ibvBXePu/ai-agent-connect - **Tags:** binary-math, subnet-calculation, firewall-rules, network-security, ip-addressing ## Description The IP & CIDR Validator handles the binary math required for network security tasks. When you're working in network operations, "close enough" isn't good enough. If an AI agent is trying to figure out if a specific IP address falls within a firewall's allowed range, it's going to struggle with the underlying math. It might guess right once, but it'll eventually get it wrong, potentially opening a security hole. This Connector takes that guesswork out of the equation. It gives your AI client the ability to perform precise, deterministic calculations on CIDR blocks and IP addresses. Instead of the LLM trying to visualize a subnet, it uses the tool to get the exact network boundaries, host ranges, and broadcast addresses. It makes your agent a reliable partner for auditing firewall rules, analyzing access logs, or configuring network permissions. You can trust the results because they're based on standard networking logic, not probabilistic guessing. By adding this to your setup in the Vinkius catalog, you're essentially giving your agent a dedicated networking calculator that handles the nitty-gritty details of IPv4 and IPv6 math perfectly every time. ## Tools ### validate_ip Check if an IP address belongs to a CIDR block and get the network's broadcast and host range. This is perfect for verifying firewall permissions. ## Prompt Examples **Prompt:** ``` Check if the IP 192.168.1.150 belongs to the allowed subnet 192.168.1.0/25. ``` **Response:** ``` ### IP Validation Results - **IP Address:** `192.168.1.150` (IPv4) - **Subnet:** `192.168.1.0/25` - **Match Status:** ❌ **False** *The IP address falls outside the specified subnet range.* ``` **Prompt:** ``` Is this a valid IPv6 address? 2001:0db8:85a3:0000:0000:8a2e:0370:7334 ``` **Response:** ``` ### IPv6 Validation - **Input:** `2001:0db8:85a3:0000:0000:8a2e:0370:7334` - **Status:** ✅ **Valid IPv6 Address** *The address was parsed successfully.* ``` **Prompt:** ``` Verify if this IP string from the log is valid. ``` **Response:** ``` ### Log Entry Validation - **Input String:** `10.0.0.256` - **Status:** ⚠️ **Invalid Address** *The string does not conform to valid IPv4 formatting.* ``` ## Capabilities ### Check subnet membership Your agent gets a definitive true or false when comparing an IP to a CIDR block. ### Get network boundaries Pull exact network addresses, broadcast addresses, and host ranges from a CIDR string. ### Validate IP formats Instantly confirm if a string is a properly formatted IPv4 or IPv6 address. ### Analyze CIDR allocations Identify the specific range of usable hosts within a given network block. ### Identify host ranges Your agent can quickly list the start and end of a usable host range for any subnet. ## Use Cases ### Firewall Audit A security engineer asks the agent to check if 10 IPs from a log belong to the corporate VPN subnet. ### Log Analysis A SOC analyst wants to know the broadcast address for a specific CIDR range found in a suspicious packet. ### Subnet Planning A network admin needs to verify if a new /24 block overlaps with existing office allocations. ### Access Control An admin asks the agent to confirm which IPs are allowed based on a list of authorized CIDR ranges. ## Benefits - Stop guessing on firewall rules by using validate_ip for deterministic subnet matching. - Handle complex IPv6 addresses with the same precision as IPv4. - Reduce errors in network provisioning by getting exact host ranges every time. - Automate the tedious task of calculating broadcast addresses for different subnets. - Build more reliable security agents that won't fail on simple binary arithmetic. ## How It Works The bottom line is that your agent stops guessing and starts calculating accurate network data. 1. Provide your agent with an IP address and a CIDR block to check. 2. The agent uses the tool to perform the binary math. 3. You get a clear confirmation of the match along with the network's broadcast and host ranges. ## Frequently Asked Questions **Can the IP & CIDR Validator check if an IP is in a subnet?** Yes. It provides a definitive match result by performing the binary math required to see if an IP falls within a specific CIDR block. **Does the IP & CIDR Validator work with IPv6?** Yes. It handles both IPv4 and IPv6 addresses with the same level of precision. **How can I use the IP & CIDR Validator for firewall logs?** You can ask your agent to scan logs and verify if the source or destination IPs belong to authorized subnets, helping you spot unauthorized access. **Can the IP & CIDR Validator find the broadcast address?** Yes. When you provide a CIDR block, it can instantly return the network address, broadcast address, and usable host range. **Is the IP & CIDR Validator good for network security?** It is built specifically for network security. It removes the risk of an AI agent guessing math incorrectly when auditing firewall rules. **Can I use the IP & CIDR Validator to find host ranges?** Yes. It calculates the exact start and end of usable host ranges for any given subnet, which is helpful for network planning. **Does it support IPv6?** Yes, it fully supports parsing and subnet matching for both IPv4 and IPv6 standard formats. **What happens if I pass an invalid IP?** The engine will safely catch the error and return a validation failure, preventing the agent from proceeding with bad data. **Does it connect to the network to ping the IP?** No. All checks are mathematical format and binary range checks performed entirely local.