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CASB Integration

Your CASB Already Sees AI Traffic.
Make It Act on It.

Feed 17,410+ classified AI-tool domains into your CASB platform. Transform your cloud access security broker from a passive observer into an active AI governance engine.

17,410+AI Domains Classified
18Tool Categories
3Major CASBs Supported
Inline Enforcement
DLP Upload Scanning
Identity-Aware Policies
Shadow AI Discovery
Session Controls
Daily Feed Updates
CASB as Enforcement Layer

Why Your CASB Is the Right Place to Govern AI Tool Access

Firewalls, DNS filters, and endpoint agents each play a role in AI governance. None match the depth of visibility and control a CASB provides.

The CASB Difference

A CASB doesn't just see that a user connected to an AI domain. It sees session context, uploaded data, user identity, device posture, and specific actions performed. The difference: knowing an employee visited chat.openai.com vs. knowing a finance employee uploaded a 2MB spreadsheet to ChatGPT from an unmanaged device at 11pm on a Saturday.

Inline Mode vs. API Mode

Deploy inline mode for enforcement and API mode for discovery. The AI Tools Blocklist provides the domain intelligence layer your CASB needs for both.

Inline Mode

CASB sits as a forward/reverse proxy in the traffic path. Every HTTP request passes through for real-time inspection, DLP enforcement, and blocking before data reaches the AI tool.

Best for: enforcement & data loss prevention

API Mode

Connects to cloud service APIs after the fact to scan for policy violations and discover shadow IT. Cannot prevent data from reaching an AI tool — only detects that it already has.

Best for: discovery & audit
Category-based policies scale where individual domain decisions cannot
  • Block all "Code Generation" tools for the finance department
  • Allow "Text & Language" tools with DLP content scanning enabled
  • Monitor "Image Generation" tools with full session logging
  • New domains auto-inherit their category's governance tier daily

Deep Session Visibility

Inspect the full HTTP transaction — uploaded files, submitted prompts, pasted data — not just domains and IPs. Session-level visibility is impossible at the firewall or DNS layer.

Identity-Aware Policies

Bind policies to users and groups from your IdP — not just IPs. Apply different AI access rules to engineering, legal, HR, and finance with appropriate DLP profiles.

Content Inspection at Upload

Scan file uploads and form submissions in real time. Detect PII, source code, credentials, and financial data before they leave the organization.

Side by Side

Inline vs. API Mode: Detailed Comparison

The two deployment modes see different things, stop different things, and fail in different ways. Compare before you choose where to enforce.

AspectInline ModeAPI Mode
How it worksForward/reverse proxy in the traffic pathConnects to SaaS APIs (Graph, Google Workspace, etc.)
What it seesFull request/response content, files, prompts, payloadsAPI-level activity logs within sanctioned apps
Best forBlocking access, DLP scanning, real-time enforcementShadow IT discovery, embedded AI features in SaaS
LimitationRequires agent-based traffic steering on endpointsCannot prevent data submission — only detects after the fact
AI tool coverageAll 17,410+ AI domains via blocklist integrationOnly sanctioned apps with API connectors (e.g., productivity suite AI features)

Most enterprises deploy both modes simultaneously. Inline mode enforces real-time policies; API mode supplements with retrospective discovery of AI features within sanctioned SaaS platforms.

Inline CASB Integration

Inline CASB: Custom App Definitions and Real-Time Protection for AI Domains

Your inline CASB platform classifies thousands of cloud apps, but the AI landscape evolves faster than any single vendor catalog. The AI Tools Blocklist bridges this gap with 17,410+ classified AI domains importable as custom app definitions.

1

Import Blocklist CSV

Load domains grouped by category via your CASB's REST API as custom URL lists.

2

Create Category Policies

Map each URL list to a real-time protection policy with category-appropriate actions.

3

Automate Daily Sync

Daily feed updates push new AI tool domains to your CASB automatically — no manual intervention.

#!/usr/bin/env python3
"""Sync AI Tools Blocklist domains into an inline CASB as custom app definitions."""

import csv
import requests
import json

CASB_TENANT = "yourcompany.casb-platform.example"
API_TOKEN = "your-casb-api-token"
BLOCKLIST_CSV = "ai_tools_blocklist.csv"

HEADERS = {
    "Authorization": f"Bearer {API_TOKEN}",
    "Content-Type": "application/json",
}
BASE_URL = f"https://{CASB_TENANT}/api/v2"

def load_blocklist(path: str) -> dict:
    """Load AI domains grouped by category from the blocklist CSV."""
    categories = {}
    with open(path) as f:
        for row in csv.DictReader(f):
            cat = row.get("primary_category", "Unknown")
            categories.setdefault(cat, []).append({
                "domain": row["domain"].lower(),
                "tool_name": row.get("tool_name", ""),
            })
    return categories

def create_url_list(list_name: str, domains: list) -> int:
    """Create or update a CASB URL list for a given AI category."""
    payload = {
        "name": list_name,
        "type": "exact",
        "urls": [d["domain"] for d in domains],
    }
    resp = requests.post(
        f"{BASE_URL}/policy/urllist",
        headers=HEADERS,
        json=payload,
    )
    resp.raise_for_status()
    list_id = resp.json()["id"]
    print(f"Created URL list '{list_name}' with {len(domains)} domains (ID: {list_id})")
    return list_id

def create_real_time_policy(category: str, url_list_id: int, action: str):
    """Create a real-time protection policy for an AI tool category."""
    policy = {
        "name": f"AI-Gov-{category.replace(' ', '-')}",
        "policy_type": "real_time",
        "priority": 100,
        "match_criteria": {
            "url_list": [url_list_id],
            "activities": ["upload", "post", "share"],
        },
        "action": action,
        "dlp_profile": "AI-Upload-Sensitive-Data",
        "alert": "yes",
        "log_type": "all",
    }
    resp = requests.post(
        f"{BASE_URL}/policy/realtime",
        headers=HEADERS,
        json=policy,
    )
    resp.raise_for_status()
    print(f"Policy '{policy['name']}' created — action: {action}")

# Define enforcement actions per AI tool category
CATEGORY_ACTIONS = {
    "Text Generation":   "user_alert",    # Coach users, allow with warning
    "Code Generation":   "block",         # Block — source code exfiltration risk
    "Image Generation":  "allow",         # Low data risk — allow with logging
    "Data Analytics":    "block",         # Block — dataset upload risk
    "Voice & Speech":    "block",         # Block — biometric data risk
    "AI Agents":         "block",         # Block — autonomous data access
    "Healthcare AI":     "block",         # Block — PHI/HIPAA risk
}

# Sync blocklist into your CASB platform
categories = load_blocklist(BLOCKLIST_CSV)
for category, domains in categories.items():
    list_name = f"AIBlocklist-{category.replace(' ', '-')}"
    list_id = create_url_list(list_name, domains)
    action = CATEGORY_ACTIONS.get(category, "user_alert")
    create_real_time_policy(category, list_id, action)

Category Enforcement Actions

Each of the 18 blocklist categories maps to an enforcement action matched to its data-exfiltration risk.

CategoryActionReason
Text GenerationUser AlertCoach users, allow with data sensitivity warning
Code GenerationBlockSource code exfiltration & IP exposure risk
Image GenerationAllow + LogLow data sensitivity from text-to-image prompts
Data AnalyticsBlockUsers upload entire datasets with sensitive records
Voice & SpeechBlockBiometric voice data exposure risk
AI AgentsBlockAutonomous data access beyond user intent
Healthcare AIBlockPHI/HIPAA compliance exposure
Tune the DLP profile Configure the DLP profile AI-Upload-Sensitive-Data to match your organization's sensitive data patterns — credit card numbers, SSNs, API keys, and internal project names.
Steering Configuration Required All AI-related domain traffic must be steered through your CASB's inline proxy. Without proper steering, traffic to novel AI tools bypasses the CASB entirely, and your governance policies are ineffective. The AI Tools Blocklist provides the comprehensive domain list needed for full steering coverage.
Cloud Security Platform

Cloud Security Platform: Session Policies and Conditional Access

Cloud security platforms integrate natively with identity providers, endpoint protection, and enterprise productivity suites. For organizations already invested in a cloud ecosystem, they provide the most friction-free path to CASB-based AI governance.

How Cloud Security Platforms Discover AI Tools

Cloud Discovery (Log Collection)

Analyzes firewall and proxy traffic logs to identify cloud apps in use, user counts, and data upload volumes.

Endpoint Protection Signals

Network telemetry from managed endpoints captures AI tool access even when traffic bypasses the proxy.

AI Tools Blocklist Enrichment

Tag every AI-related app with custom risk scores and governance tags. Newly launched AI tools are immediately identified and tagged as "unsanctioned."

# Cloud Security Platform API: Tag AI tools and create governance policies
# Requires: Platform API token with manage permissions

$PlatformUrl = "https://yourcompany.cloud-security-platform.example"
$ApiToken = "your-platform-api-token"
$Headers = @{
    "Authorization" = "Token $ApiToken"
    "Content-Type"  = "application/json"
}

# Step 1: Import AI Tools Blocklist and tag apps in the catalog
$blocklist = Import-Csv "ai_tools_blocklist.csv"
$tagMap = @{
    "Text Generation"   = "AI-TextGen-Unsanctioned"
    "Code Generation"   = "AI-CodeGen-Blocked"
    "Image Generation"  = "AI-ImageGen-Monitor"
    "Data Analytics"    = "AI-Analytics-Blocked"
    "AI Agents"         = "AI-Agents-Blocked"
    "Voice & Speech"    = "AI-Voice-Blocked"
}

foreach ($entry in $blocklist) {
    $tag = $tagMap[$entry.primary_category]
    if (-not $tag) { $tag = "AI-Tool-Unclassified" }

    # Search for the app in the cloud app catalog by domain
    $searchBody = @{
        filters = @{
            domain = @{ eq = @($entry.domain) }
        }
    } | ConvertTo-Json -Depth 5

    $apps = Invoke-RestMethod "$PlatformUrl/api/v1/discovery/discovered_apps/" `
        -Method POST -Headers $Headers -Body $searchBody

    foreach ($app in $apps.data) {
        # Mark as unsanctioned and apply category tag
        $tagBody = @{
            filters = @{ appId = @{ eq = @($app.appId) } }
            appTags = @($tag)
            sanctioned = $false
        } | ConvertTo-Json -Depth 5

        Invoke-RestMethod "$PlatformUrl/api/v1/discovery/discovered_apps/bulk/" `
            -Method POST -Headers $Headers -Body $tagBody
    }
}

# Step 2: Create an App Discovery Policy for new AI tools
$discoveryPolicy = @{
    name        = "New AI Tool Detected"
    description = "Alert when a previously unseen AI tool is accessed"
    policyType  = "discovery"
    severity    = "MEDIUM"
    enabled     = $true
    filters     = @{
        tag     = @{ eq = @("AI-Tool-Unclassified", "AI-TextGen-Unsanctioned") }
        userCount = @{ gte = 1 }
    }
    alertActions = @{
        sendAlert    = $true
        alertRecipients = @("[email protected]")
        markUnsanctioned = $true
    }
} | ConvertTo-Json -Depth 5

Invoke-RestMethod "$PlatformUrl/api/v1/policies/" `
    -Method POST -Headers $Headers -Body $discoveryPolicy

# Step 3: Create a Session Policy for sanctioned AI tools
# (Requires Conditional Access App Control configured in your identity provider)
$sessionPolicy = @{
    name        = "AI Tool Upload Inspection"
    description = "Scan all file uploads to sanctioned AI tools for sensitive content"
    policyType  = "session"
    sessionControlType = "controlFileUpload"
    severity    = "HIGH"
    enabled     = $true
    filters     = @{
        app     = @{ eq = @("Sanctioned-AI-Tool-1", "Sanctioned-AI-Tool-2") }
        activity = @{ eq = @("upload") }
    }
    contentInspection = @{
        enabled = $true
        dlpProfiles = @("PII-Detection", "Source-Code-Detection", "Financial-Data")
    }
    actions     = @{
        blockUpload = $true
        notifyUser  = "This upload was blocked because it contains sensitive data."
        alert       = $true
    }
} | ConvertTo-Json -Depth 5

Invoke-RestMethod "$PlatformUrl/api/v1/policies/" `
    -Method POST -Headers $Headers -Body $sessionPolicy

Write-Host "AI governance policies deployed to cloud security platform successfully."

What the Script Does

1

Tag & Mark Unsanctioned

Imports the blocklist and tags each app in the cloud app catalog with a category-specific label. Marks all as unsanctioned to trigger governance workflows.

2

Discovery Policy

Fires when a new or unclassified AI tool appears in network traffic. Alerts the SOC and auto-marks the app as unsanctioned.

3

Session Policy (DLP)

Inspects all file uploads to sanctioned AI tools (ChatGPT, Copilot, Claude) against DLP profiles for PII, source code, and financial data.

Configuration, not architecture The Session Policy requires Conditional Access App Control configured in your identity provider, which routes sessions through the CASB reverse proxy. For organizations already using conditional access for their productivity suite, extending it to AI tools is a configuration change — not an architecture change.

Conditional Access Integration for AI Tools

Combine Conditional Access with CASB session controls to enforce layered access policies for AI tools.

A typical AI governance conditional access policy requires all of
  • User is a member of the "AI-Approved-Users" security group
  • Device is MDM-compliant (patched, encrypted, EDR active)
  • Sign-in risk level is Low (no anomalies detected)
  • Session is routed through the CASB for DLP content inspection
Deny by default Users who don't meet all four conditions are denied access entirely. This enables nuanced policies: allow GitHub Copilot from a managed device on the corporate network, but block from personal devices or unfamiliar locations.
The Domain Intelligence Layer

One Feed, Every CASB Enforcement Point

Whichever CASB architecture you run, the blocklist supplies the same continuously updated AI domain intelligence — imported once, enforced everywhere.

17,410+AI domains classified
18Tool categories in the taxonomy
3CASB integration modes covered
24hMaximum age of any new AI domain
Inline proxy enforcement API connectors Conditional access DLP profiles Session controls Tenant restrictions
Proxy-Based CASB Integration

Proxy-Based CASB: Cloud Application Control and SSL Inspection for AI Domains

Proxy-based CASB platforms provide inline enforcement through their cloud proxy architecture. The AI Tools Blocklist integrates through custom URL categories and cloud application control policies.

Key proxy-based CASB capabilities for AI governance
  • Import the full blocklist as categorized custom URL lists across all 18 categories
  • Custom categories available in firewall rules, URL filtering, DLP, and app control policies
  • Granular activity controls for major AI tools (login, upload, download, API calls)
SSL Inspection Is Mandatory Without SSL inspection, the proxy sees only the domain name (from the SNI field) but cannot inspect uploaded content. DLP policies won't scan AI tool submissions, and activity controls can't distinguish browsing from data exfiltration. Add all AI tool URL categories to the SSL inspection include list with zero exceptions.

Granular Activity Controls

Control what users can do on an AI tool — not just whether they can reach it.

Browse-only access

Allow browsing ChatGPT but block file uploads and paste operations.

Subnet-based API access

Allow API access to Claude from the engineering subnet but block web interface from all others.

Download controls

Allow AI tool interaction but block download of generated content that may contain hallucinated data.

URL Filtering for AI Domains

Map each of the 18 AI tool categories to a separate custom URL category. Block, allow with caution, or monitor based on your risk appetite.

SSL Inspection Enforcement

Enable mandatory SSL decryption for all AI tool URL categories. Ensure AI domains never fall into bypass or exempt categories.

Long-tail coverage The AI Tools Blocklist covers the long tail of AI tools that your CASB's built-in catalog may not recognize. Combined with the platform's native activity controls for major AI tools, this provides comprehensive AI governance.
Tiered Governance Model

Sanctioned, Tolerated, and Blocked: A Three-Tier AI App Governance Model

Blanket bans drive adoption underground. Effective governance uses a tiered model that recognizes productivity benefits while managing data risks.

Sanctioned

  • Vetted, contracted, and fully governed
  • DLP inline scanning on all uploads
  • Session controls enforced, activity logging enabled
  • Conditional access requires managed device + compliant posture
  • Vendor DPA and exit strategy in place

Tolerated

  • Permitted with monitoring and user coaching alerts on access
  • DLP blocks sensitive data uploads
  • Full session logging for audit trail
  • No vendor agreement — not approved for confidential data
  • Quarterly review for promotion to sanctioned or demotion to blocked

Blocked

  • All access denied at the CASB
  • Users redirected to internal AI tool request portal
  • Default tier for all unassessed domains
  • Automatic classification via AI Tools Blocklist category mapping
  • Tools that fail security review remain permanently blocked
Automatic tier assignment The AI Tools Blocklist's 18-category taxonomy maps directly to this model. New domains auto-inherit their category's governance tier daily.

DLP Content Inspection for AI Tool Uploads

DLP scanning is the most critical control for sanctioned and tolerated tiers. The risk shifts from unauthorized access to unauthorized data submission.

AI-specific DLP profiles should detect
  • Source code patterns — function definitions, import statements, class declarations
  • API keys & credentials — cloud provider keys, service connection strings, repository tokens, DB credentials
  • Internal identifiers — employee IDs, project code names, customer account numbers
  • Financial data — revenue figures, margin calculations, financial statement line items
  • Standard PII — credit card numbers, Social Security numbers, personal records
  • Bulk text submissions — anything over 5,000 characters likely represents a pasted document or code file

Graduated DLP Response Actions

Content DetectedActionAlert Level
Internal project nameUser coaching notificationInformational
Credit card / SSNBlock submission + SOC alertHigh
Source code + embedded API keysBlock + alert + escalate as credential exposureCritical

This graduated response avoids alert fatigue while ensuring high-risk data submissions are stopped immediately. See our AI data handling policy guide for detailed DLP profile configuration.

Session Governance

Session Controls and Tenant Restrictions

Tenant restrictions ensure employees use your enterprise AI tenant (where DPAs apply) — not personal accounts where data may be used for model training.

Available CASB session controls
  • Clipboard restrictions — prevent copy-paste of AI output into internal systems without review
  • Download blocking — prevent downloading AI-generated files that may contain hallucinated data
  • Watermarking — inject tracking identifiers into content viewed through the CASB proxy
  • Session time limits — auto-terminate AI tool sessions after a defined period

Cloud Security Platforms

Session policies check the tenant identifier in authentication tokens. Integrates with identity provider conditional access app control.

Inline CASB Platforms

Tenant restrictions configured through steering configuration with HTTP header injection rules for AI tool domains.

Proxy-Based CASB Platforms

Custom header insertion rules in URL filtering policies restrict access to approved organizational tenants only.

Shadow IT Discovery

Shadow AI Discovery: Using CASB Telemetry to Find What You Cannot See

Employees don't submit procurement requests to use a free AI chatbot. They open a browser tab and start working. CASB telemetry enriched with the AI Tools Blocklist is the most effective mechanism for discovering shadow AI at scale.

1

Ingest traffic

CASB analyzes inline proxy traffic or ingests logs from firewalls, proxies, and DNS servers.

2

Correlate against blocklist

Match observed domains against 17,410+ AI-specific domains. Without the blocklist, obscure AI tools appear as "uncategorized web traffic."

3

Alert on new AI tools

Generate automated alerts including category classification, users who accessed it, data volume uploaded, and recommended governance action.

4

Auto-enforce default tier

New AI tools enter the Blocked tier by default. CASB enforces the block while the security team assesses for promotion to Tolerated or Sanctioned.

Continuous Discovery

Correlate all web traffic against the daily-updated blocklist. New AI domains trigger SOC alerts with category, risk score, and recommended governance tier. Integrate with your shadow AI detection program.

Usage Analytics

CASB telemetry reveals data volume uploaded, session frequency, peak usage times, and which departments adopt AI tools fastest. A tool used by one employee is a different risk than one embedded in a team's daily workflow.

Nothing escapes the feed Daily update cadence ensures even the newest AI tools are captured within 24 hours. No AI tool operates in a governance vacuum — every tool is either assessed and governed, or blocked pending assessment.
Start with a Retrospective Analysis Run your existing CASB or proxy logs against the full AI Tools Blocklist. Most organizations discover employees use 5–10x more AI tools than leadership expects. This baseline provides the urgency needed to fund a CASB-based AI governance program. Automate via the AI Tools Blocklist API.

Deploy CASB-Based AI Governance in Your Environment

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Request a CASB Integration Consultation

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