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ako2345

Android Security Analyzer

by ako2345

Android Security Analyzer

MCP server for static security analysis of Android application source code. Runs on Cloudflare Workers as a remote MCP server over Streamable HTTP.

What it does

Analyzes Android project source files — without building the project — and returns a structured security report. The analysis covers:

  • Manifest analysis — exported components, dangerous permissions, cleartext traffic, debug flags, backup settings, SDK versions

  • Gradle/build config — release build misconfigurations, outdated SDKs, suspicious dependencies, hardcoded secrets

  • Source code (Java/Kotlin) — insecure WebView, SSL/TLS bypass, weak crypto, SQL injection patterns, process execution, insecure file storage, PendingIntent issues

  • XML configuration — network security config weaknesses, overly broad file provider paths

  • Secret scanning — API keys, tokens, passwords, private keys, cloud credentials, high-entropy strings

All analysis is regex/pattern-based and runs natively in the Workers runtime with no external tools, Java, or Android SDK required.

Related MCP server: APK Security Guard MCP Suite

Architecture

POST /mcp ──► McpServer (JSON-RPC 2.0) ──► Tool Router
                                              │
              ┌───────────────────────────────┘
              ▼
         Orchestrator
              │
    ┌─────────┼─────────┬─────────────┬──────────────┐
    ▼         ▼         ▼             ▼              ▼
 Manifest  Gradle   Source Code   XML Config    Secret
 Analyzer  Analyzer  Analyzer     Analyzer     Scanner
    │         │         │             │              │
    └─────────┴─────────┴─────────────┴──────────────┘
              │
              ▼
     Scoring + Deduplication ──► AnalysisReport

Key design decisions:

  • Stateless — no sessions, no Durable Objects

  • Minimal MCP JSON-RPC 2.0 implementation (no heavy SDK dependencies)

  • Data-driven rule engine with extensible rule registry

  • Independent analyzers with unified Finding type

  • Lightweight XML parsing via fast-xml-parser

  • Input validation via zod

  • Bundle size: ~66KB gzipped

MCP Tools

Tool

Description

analyze_android_project

Full security analysis of project files

list_android_security_checks

List all implemented security rules

explain_finding

Detailed explanation of a specific rule

health

Server status and rule engine stats

Install

Hosted server (recommended for Cline / MCP clients): no local install needed. The server runs at:

https://android-security-analyzer.ako-labs.workers.dev/mcp

Add this URL to your MCP client configuration (see Connecting from an MCP client below).

Local development:

npm install

Development

npm run dev

This starts a local Wrangler dev server. The MCP endpoint is available at http://localhost:8787/mcp.

Deploy

npm run deploy

Deploys to Cloudflare Workers. Requires wrangler authentication (npx wrangler login).

Testing

npm test              # Run all tests
npm run test:watch    # Watch mode
npm run typecheck     # TypeScript type checking

Local MCP Testing

Initialize the connection

Unix:

curl -X POST http://localhost:8787/mcp \
  -H "Content-Type: application/json" \
  -d '{"jsonrpc":"2.0","id":1,"method":"initialize","params":{"protocolVersion":"2025-03-26","capabilities":{},"clientInfo":{"name":"test","version":"1.0"}}}'

Windows (PowerShell):

(Invoke-WebRequest -Method Post -Uri "http://localhost:8787/mcp" -ContentType "application/json" -Body '{"jsonrpc":"2.0","id":1,"method":"initialize","params":{"protocolVersion":"2025-03-26","capabilities":{},"clientInfo":{"name":"test","version":"1.0"}}}' -UseBasicParsing).Content

List available tools

Unix:

curl -X POST http://localhost:8787/mcp \
  -H "Content-Type: application/json" \
  -d '{"jsonrpc":"2.0","id":2,"method":"tools/list"}'

Windows (PowerShell): ответ приходит в result.tools; чтобы увидеть список как JSON, используйте сырой ответ:

(Invoke-WebRequest -Method Post -Uri "http://localhost:8787/mcp" -ContentType "application/json" -Body '{"jsonrpc":"2.0","id":2,"method":"tools/list"}' -UseBasicParsing).Content

Либо через объект: (Invoke-RestMethod ...).result.tools | ConvertTo-Json -Depth 5

Check health

Unix:

curl -X POST http://localhost:8787/mcp \
  -H "Content-Type: application/json" \
  -d '{"jsonrpc":"2.0","id":3,"method":"tools/call","params":{"name":"health","arguments":{}}}'

Windows (PowerShell):

(Invoke-WebRequest -Method Post -Uri "http://localhost:8787/mcp" -ContentType "application/json" -Body '{"jsonrpc":"2.0","id":3,"method":"tools/call","params":{"name":"health","arguments":{}}}' -UseBasicParsing).Content

Run analysis (minimal example)

Unix:

curl -X POST http://localhost:8787/mcp \
  -H "Content-Type: application/json" \
  -d '{
    "jsonrpc": "2.0",
    "id": 4,
    "method": "tools/call",
    "params": {
      "name": "analyze_android_project",
      "arguments": {
        "projectName": "TestApp",
        "files": [
          {
            "path": "app/src/main/AndroidManifest.xml",
            "content": "<manifest><application android:debuggable=\"true\" android:allowBackup=\"true\"></application></manifest>"
          }
        ]
      }
    }
  }'

Windows (PowerShell):

$body = @{
  jsonrpc = "2.0"
  id = 4
  method = "tools/call"
  params = @{
    name = "analyze_android_project"
    arguments = @{
      projectName = "TestApp"
      files = @(
        @{
          path = "app/src/main/AndroidManifest.xml"
          content = "<manifest><application android:debuggable=`"true`" android:allowBackup=`"true`"></application></manifest>"
        }
      )
    }
  }
} | ConvertTo-Json -Depth 10
(Invoke-WebRequest -Method Post -Uri "http://localhost:8787/mcp" -ContentType "application/json" -Body $body -UseBasicParsing).Content

Connecting from an MCP client

Add to your MCP client configuration:

{
  "mcpServers": {
    "android-security-analyzer": {
      "url": "http://localhost:8787/mcp"
    }
  }
}

For production (hosted):

{
  "mcpServers": {
    "android-security-analyzer": {
      "url": "https://android-security-analyzer.ako-labs.workers.dev/mcp"
    }
  }
}

Security Rules

The analyzer implements 53 security rules across 5 categories:

Category

Prefix

Rules

Examples

Manifest

MAN-*

17

debuggable, allowBackup, exported components, permissions

Gradle

GRD-*

9

release config, SDK versions, dependencies, secrets

Source

SRC-*

17

WebView, SSL/TLS, crypto, injection, file storage

XML Config

XML-*

4

network security config, file provider paths

Secret

SEC-*

7

API keys, tokens, passwords, cloud credentials

Each finding includes:

  • Stable rule ID

  • Severity (critical/high/medium/low/info) and confidence (high/medium/low)

  • File path and line number (when determinable)

  • Evidence snippet

  • CWE and OWASP Mobile Top 10 mappings

  • Actionable recommendation

Scoring

Risk score (0-100) is computed from finding severities:

  • Critical: 9 points

  • High: 6 points

  • Medium: 3 points

  • Low: 1 point

  • Info: 0 points

The raw sum is normalized against an expected maximum of 50 points.

Limitations

  • Not a SAST replacement — pattern/regex-based heuristics, not full AST/dataflow analysis

  • No build required — analyzes raw source, so build-time transforms are not visible

  • False positives possible — especially for secret scanning and some code patterns

  • Workers constraints — 128MB memory limit, CPU time limits, no filesystem access

  • No APK/AAB analysis — source code only

  • No inter-procedural analysis — patterns are matched per-file, not across call graphs

Project Structure

src/
├── index.ts                          # Worker entry point
├── server/
│   ├── mcp.ts                        # MCP JSON-RPC 2.0 handler
│   └── tools/                        # MCP tool implementations
│       ├── analyzeAndroidProject.ts
│       ├── listAndroidSecurityChecks.ts
│       ├── explainFinding.ts
│       └── health.ts
├── core/
│   ├── types.ts                      # TypeScript types & Zod schemas
│   ├── scoring.ts                    # Risk score computation
│   ├── registry.ts                   # Rule registry
│   └── orchestrator.ts              # Analysis orchestrator
├── analyzers/
│   ├── manifestAnalyzer.ts
│   ├── gradleAnalyzer.ts
│   ├── sourceAnalyzer.ts
│   ├── xmlConfigAnalyzer.ts
│   └── secretScanner.ts
├── parsers/
│   ├── xml.ts                        # XML parser wrapper
│   ├── gradle.ts                     # Gradle file parser
│   ├── source.ts                     # Source code pattern matcher
│   └── files.ts                      # File classifier
├── rules/
│   ├── manifestRules.ts
│   ├── gradleRules.ts
│   ├── sourceRules.ts
│   ├── xmlRules.ts
│   └── secretRules.ts
├── mappings/
│   ├── cwe.ts                        # CWE descriptions
│   └── owaspMobile.ts               # OWASP Mobile Top 10
└── utils/
    ├── lines.ts                      # Line number utilities
    ├── paths.ts                      # Path classification
    └── text.ts                       # Text utilities
test/
├── fixtures/                         # Sample Android project files
├── unit/                             # Unit tests per module
└── integration/                      # Full analysis integration tests

Adding New Rules

  1. Define the rule in the appropriate file under src/rules/

  2. Add detection logic in the corresponding analyzer under src/analyzers/

  3. Add CWE mapping in src/mappings/cwe.ts if needed

  4. Add a test case

  5. The rule is automatically registered via src/core/registry.ts

License

MIT

F
license - not found
Not graded
quality - not tested
D
maintenance

Maintenance

Maintainers
Response time
Release cycle
Releases (12mo)
Commit activity

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