HubSpot Policy & Guardrails

Overview

Automated policy enforcement for HubSpot integrations: secret scanning, ESLint rules, CI checks for token leaks, and runtime guardrails.

Prerequisites

• ESLint configured in project
• CI/CD pipeline (GitHub Actions)
• TypeScript for compile-time enforcement

Instructions

Step 1: Secret Scanning (Prevent Token Leaks)

# .github/workflows/hubspot-security.yml
name: HubSpot Security Scan
on: [push, pull_request]

jobs:
  secret-scan:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4

      - name: Scan for HubSpot private app tokens
        run: |
          # Pattern: pat-{region}{number}-{uuid}
          if grep -rE "pat-[a-z]{2}[0-9]-[a-f0-9-]{36}" \
            --include="*.ts" --include="*.js" --include="*.json" --include="*.yaml" \
            --exclude-dir=node_modules --exclude-dir=.git .; then
            echo "::error::HubSpot private app token found in source code!"
            echo "Rotate this token immediately in HubSpot Settings > Private Apps"
            exit 1
          fi

      - name: Scan for deprecated API keys
        run: |
          # Pattern: hapikey=uuid
          if grep -rE "hapikey=[a-f0-9-]{36}" \
            --include="*.ts" --include="*.js" --include="*.env.example" \
            --exclude-dir=node_modules .; then
            echo "::error::Deprecated HubSpot API key found! Migrate to private app tokens."
            exit 1
          fi

      - name: Verify .gitignore includes .env files
        run: |
          if ! grep -q "^\.env$" .gitignore; then
            echo "::error::.gitignore missing .env entry"
            exit 1
          fi

Step 2: ESLint Rule -- No Deprecated API Key Auth

// eslint-rules/no-hubspot-api-key.js
module.exports = {
  meta: {
    type: 'problem',
    docs: { description: 'Disallow deprecated HubSpot API key authentication' },
    messages: {
      noApiKey: 'HubSpot API keys are deprecated. Use accessToken from a private app instead.',
      useAccessToken: 'Use { accessToken: process.env.HUBSPOT_ACCESS_TOKEN } instead of { apiKey }',
    },
  },
  create(context) {
    return {
      Property(node) {
        if (
          node.key.type === 'Identifier' &&
          node.key.name === 'apiKey' &&
          node.parent?.parent?.callee?.name === 'Client'
        ) {
          context.report({ node, messageId: 'noApiKey' });
        }
      },
      Literal(node) {
        if (typeof node.value === 'string') {
          // Detect hardcoded private app tokens
          if (node.value.match(/^pat-[a-z]{2}\d-[a-f0-9-]{36}$/)) {
            context.report({
              node,
              message: 'Hardcoded HubSpot access token detected. Use environment variable.',
            });
          }
          // Detect deprecated API keys
          if (node.value.match(/^[a-f0-9]{8}-[a-f0-9]{4}-[a-f0-9]{4}-[a-f0-9]{4}-[a-f0-9]{12}$/) &&
              node.parent?.key?.name === 'apiKey') {
            context.report({ node, messageId: 'useAccessToken' });
          }
        }
      },
    };
  },
};

Step 3: TypeScript Compile-Time Guardrails

// src/hubspot/strict-types.ts

// Enforce that all HubSpot operations go through the service layer
// (not raw client calls scattered throughout the codebase)

// BAD: Using raw client anywhere
// const client = new hubspot.Client({ accessToken: '...' });
// client.crm.contacts.basicApi.create(...); // unguarded

// GOOD: All operations through typed service
interface IContactService {
  findByEmail(email: string): Promise<Contact | null>;
  create(data: CreateContactInput): Promise<Contact>;
  update(id: string, data: UpdateContactInput): Promise<Contact>;
  archive(id: string): Promise<void>;
}

// Enforce required properties at compile time
interface CreateContactInput {
  email: string;           // required
  firstname?: string;
  lastname?: string;
  lifecyclestage?: 'subscriber' | 'lead' | 'marketingqualifiedlead' |
    'salesqualifiedlead' | 'opportunity' | 'customer' | 'evangelist';
}

// Prevent passing unknown/dangerous properties
type UpdateContactInput = Partial<Omit<CreateContactInput, 'email'>>;

// Compile-time check: lifecycle stage must be valid
const validStage: CreateContactInput = {
  email: 'test@example.com',
  lifecyclestage: 'customer', // TypeScript enforces valid values
};

// This would fail at compile time:
// lifecyclestage: 'invalid_stage' // Type error

Step 4: Runtime Guardrails

// Prevent dangerous operations in production
const BLOCKED_IN_PROD: Record<string, string> = {
  'batch/archive': 'Bulk archiving is blocked in production',
  'gdpr-delete': 'GDPR delete requires manual approval in production',
};

function guardOperation(path: string): void {
  if (process.env.NODE_ENV !== 'production') return;

  for (const [pattern, message] of Object.entries(BLOCKED_IN_PROD)) {
    if (path.includes(pattern)) {
      throw new Error(`BLOCKED: ${message}. Environment: production.`);
    }
  }
}

// Rate limit self-protection (don't consume entire portal quota)
class SelfRateLimiter {
  private callsThisSecond = 0;
  private callsToday = 0;
  private lastSecond = Math.floor(Date.now() / 1000);
  private lastDay = new Date().toDateString();

  private maxPerSecond: number;
  private maxPerDay: number;

  constructor(maxPerSecond = 8, maxPerDay = 400000) {
    this.maxPerSecond = maxPerSecond; // leave 2/sec headroom for other apps
    this.maxPerDay = maxPerDay;       // leave 100K/day headroom
  }

  check(): void {
    const now = Math.floor(Date.now() / 1000);
    const today = new Date().toDateString();

    if (now !== this.lastSecond) {
      this.callsThisSecond = 0;
      this.lastSecond = now;
    }
    if (today !== this.lastDay) {
      this.callsToday = 0;
      this.lastDay = today;
    }

    this.callsThisSecond++;
    this.callsToday++;

    if (this.callsThisSecond > this.maxPerSecond) {
      throw new Error(
        `Self rate limit: ${this.callsThisSecond}/${this.maxPerSecond} per second`
      );
    }
    if (this.callsToday > this.maxPerDay) {
      throw new Error(
        `Self rate limit: ${this.callsToday}/${this.maxPerDay} per day`
      );
    }
  }
}

Step 5: Pre-Commit Hook

#!/bin/bash
# .husky/pre-commit

# Scan for HubSpot tokens in staged files
PATTERN="pat-[a-z]{2}[0-9]-[a-f0-9-]{36}"
STAGED_FILES=$(git diff --cached --name-only --diff-filter=ACM | grep -E "\.(ts|js|json|yaml|yml)$")

if [ -n "$STAGED_FILES" ]; then
  if echo "$STAGED_FILES" | xargs grep -lE "$PATTERN" 2>/dev/null; then
    echo "ERROR: HubSpot access token found in staged files!"
    echo "Remove the token and use environment variables instead."
    exit 1
  fi
fi

Output

• CI secret scanning for HubSpot tokens (private app and legacy API keys)
• ESLint rules preventing deprecated auth and hardcoded tokens
• TypeScript types enforcing valid property values at compile time
• Runtime guardrails blocking dangerous production operations
• Self-rate limiting to avoid consuming entire portal quota
• Pre-commit hook catching tokens before they hit git

Error Handling

.eslintrc

Resources

• HubSpot Security Best Practices
• ESLint Custom Rules
• Husky Pre-commit Hooks

Next Steps

For architecture blueprints, see

hubspot-architecture-variants