@vulnzap/client

Vulnzap JavaScript/TypeScript Client Library

Official client for integrating with the Vulnzap vulnerability scanning service from Node.js or the browser. Provides a simple API to submit scans and receive real-time updates via Server-Sent Events (SSE).

Features

• Commit and repository scanning: Scan individual commits or full repositories for vulnerabilities
• Real-time incremental scanning: Security assistant mode for AI coding agents with live file monitoring
• Event-driven updates: Listen for update, completed, and error events via SSE
• TypeScript support: Fully typed API with comprehensive type definitions
• Local caching: Stores scan results locally for faster access and offline use
• Session management: Track incremental scans with persistent session state

Installation

npm install @vulnzap/client

Requirements

• Node.js 18+
• Vulnzap API key

Set your API key as an environment variable:

export VULNZAP_API_KEY=your_api_key_here

Quick Start

import { VulnzapClient } from "@vulnzap/client";

const client = new VulnzapClient({ 
  apiKey: process.env.VULNZAP_API_KEY! 
});

client.on("update", (evt) => {
  console.log("Scan progress:", evt);
});

client.on("completed", (evt) => {
  console.log("Scan completed:", evt);
});

client.on("error", (err) => {
  console.error("Scan error:", err);
});

await client.scanCommit({
  commitHash: "abc123",
  repository: "owner/repo",
  branch: "main",
  files: [
    { path: "src/app.js", content: "console.log('hello');" },
  ],
  userIdentifier: "[e-mail]",
});

API Reference

VulnzapClient

Constructor

new VulnzapClient(options: { apiKey: string; baseUrl?: string })

Parameters:

• apiKey: Your Vulnzap API key
• baseUrl: Optional custom API base URL (defaults to https://engine.vulnzap.com)

Methods

scanCommit

scanCommit(payload: CommitScanPayload): Promise<ScanInitResponse>

Initiates a vulnerability scan for a commit. Automatically attaches an SSE listener for real-time updates.

Parameters:

{
  commitHash: string;
  repository: string;
  branch?: string;
  files: Array<{ path: string; content: string }>;
  userIdentifier: string;
}

Returns: Promise<{ success: boolean; data: { jobId: string; status: string } }>

scanRepository

scanRepository(payload: RepositoryScanPayload): Promise<ScanInitResponse>

Initiates a full repository scan. Automatically attaches an SSE listener for real-time updates.

Parameters:

{
  repository: string;
  branch?: string;
  userIdentifier: string;
}

Returns: Promise<{ success: boolean; data: { jobId: string; status: string } }>

securityAssistant

securityAssistant({
  sessionId: "23e23",
  dirPath: "sdknksdn",
  timeout: 60000,
}): boolean

Starts a security assistant session that monitors a directory for file changes and performs incremental scans. Designed for AI coding agents to provide real-time security feedback during development.

Parameters:

• dirPath: Directory to monitor
• sessionId: Unique session identifier
• timeout: The timeout after which watcher will stop if no changes are made.

Returns: true if watcher started successfully, false otherwise, errors are emitted which can be received via client.on("error", ...)

Behavior:

• Watches directory recursively for file changes
• Excludes node_modules, .git, .md, .DS_Store, and .lock files
• Tracks whether files are new or modified
• Automatically closes session after the timeout provided
• Sends incremental scan requests to backend with context

Example:

const sessionId = "session_" + Date.now();
client.securityAssistant("./src", sessionId);

// Later, fetch results
const results = await client.getIncrementalScanResults(sessionId);

getIncrementalScanResults

getIncrementalScanResults(sessionId: string): Promise<IncrementalScanResponse>

Retrieves incremental scan results for a security assistant session.

Returns:

{
  success: boolean;
  data: {
    jobId: string;
    status: string;
    findings: any[];
  };
  error?: string;
}

getLatestCachedCommitScan

getLatestCachedCommitScan(repository: string): Promise<ScanCacheEntry | null>

Retrieves the most recent commit scan from local cache for the specified repository.

getCompletedCommitScan

getCompletedCommitScan(jobId: string): Promise<ScanApiJobResponse>

Retrieves completed scan results from the Vulnzap API for a given job ID.

Events

The client emits the following events:

• update: Emitted during scan progress with status updates
• completed: Emitted when scan finishes with final results
• error: Emitted on errors during scanning or SSE connection

Event Type:

type ScanEvent = {
  jobId: string;
  message; string
  data?: number;
};

Caching System

The client includes a local caching system that stores scan results in the user's home directory:

• Commit scans: ~/.vulnzap/client/scans/{repository}/commits/{commitHash}.json
• Repository scans: ~/.vulnzap/client/scans/{repository}/full/{jobId}.json
• Sessions: ~/.vulnzap/client/sessions/{sessionId}.json

Repository names are sanitized by replacing / with _ for filesystem compatibility.

Usage Examples

Basic Commit Scan

const client = new VulnzapClient({ apiKey: process.env.VULNZAP_API_KEY! });

client.on("completed", (result) => {
  console.log(`Found ${result.summary.totalFindings} issues`);
  result.findings.forEach(finding => {
    console.log(`${finding.severity}: ${finding.message} at ${finding.file}:${finding.line}`);
  });
});

await client.scanCommit({
  commitHash: "abc123",
  repository: "owner/repo",
  files: [{ path: "index.js", content: "/* code */" }],
  userIdentifier: "[e-mail]",
});

Repository Scan

await client.scanRepository({
  repository: "owner/repo",
  branch: "main",
  userIdentifier: "[e-mail]",
});

Security Assistant for AI Agents

const client = new VulnzapClient({ apiKey: process.env.VULNZAP_API_KEY! });
const sessionId = `agent_${Date.now()}`;

// Start monitoring
client.securityAssistant("./src", sessionId);

// Agent makes changes to files...
// Changes are automatically scanned incrementally

// Fetch results when needed
const results = await client.getIncrementalScanResults(sessionId);
if (results.success) {
  console.log("Findings:", results.data.findings);
}

Custom API Base URL

const client = new VulnzapClient({
  apiKey: process.env.VULNZAP_API_KEY!,
  baseUrl: "https://custom.vulnzap.com",
});

Error Handling

client.on("error", (errorEvent) => {
  console.error("Scan error:", errorEvent.message);
  // Implement retry logic or alerting
});

Accessing Cached Results

const latestScan = await client.getLatestCachedCommitScan("owner/repo");
if (latestScan) {
  console.log("Cached scan from:", new Date(latestScan.timestamp));
  console.log("Results:", latestScan.results);
}

TypeScript

The library ships with complete TypeScript definitions. All types are exported from the main package:

import { 
  VulnzapClient,
  CommitScanPayload,
  ScanCompletedEvent,
  ScanUpdateEvent,
  IncrementalScanResponse
} from "@vulnzap/client";

License

MIT