Trend Watching

Trend Watching is a Next.js trend intelligence dashboard that combines search + social signals with bilingual rendering:

• Original text + English text for top trend signals
• Click any signal to open a "Why this trend?" detail page
• Prompt-based personalized view (subscriber feature)
• Daily AI newsletter generation (subscriber feature)

Sources

• Google Trends RSS (live by default)
• Mastodon trends API (live by default)
• YouTube Data API (optional via key)
• X/Twitter recent search API (optional via bearer token)
• Reddit OAuth API (optional via client credentials)
• Instagram Graph API hashtag flow (optional via token + business account)

Run locally

npm install
npm run dev

Open http://localhost:3000.

Environment

Copy .env.example to .env.local and fill keys you want to enable.

GOOGLE_TRENDS_MARKETS=US,IN,GB,CA,AU,JP,DE,BR
YOUTUBE_TREND_REGIONS=US,IN,GB,BR,JP
YOUTUBE_API_KEY=
X_BEARER_TOKEN=
REDDIT_CLIENT_ID=
REDDIT_CLIENT_SECRET=
REDDIT_USER_AGENT=TrendWatching/1.0
INSTAGRAM_ACCESS_TOKEN=
INSTAGRAM_BUSINESS_ACCOUNT_ID=
INSTAGRAM_HASHTAGS=ai,startup,music,f1,fitness
GEMINI_API_KEY=
GEMINI_MODEL=gemini-3-flash
RAZORPAY_KEY_ID=
RAZORPAY_KEY_SECRET=
NEXT_PUBLIC_APP_URL=http://localhost:3000
CRON_SECRET=
SMTP_HOST=
SMTP_PORT=587
SMTP_SECURE=false
SMTP_USER=
SMTP_PASS=
SMTP_FROM=TrendWatching <[email protected]>
NEXT_PUBLIC_FIREBASE_API_KEY=
NEXT_PUBLIC_FIREBASE_AUTH_DOMAIN=
NEXT_PUBLIC_FIREBASE_PROJECT_ID=
NEXT_PUBLIC_FIREBASE_APP_ID=

Hourly refresh

• The trend fetch layer is cached at 1 hour.
• You can trigger hourly refresh through GET /api/cron/hourly.
• If CRON_SECRET is set, pass it in header: x-cron-secret.

Subscription and personalization

• GET /subscribe opens Razorpay checkout UI.
• On successful payment, Razorpay signature verification activates subscriber cookie.
• Subscribers can set a focus prompt with source-balanced results across Google/YouTube/Mastodon and generate a daily AI newsletter.
• Set SMTP env vars to enable sending the newsletter to email.
• Set Firebase web config env vars to enable email/password sign in and sign up.

API routes

• GET /api/trends
• GET /api/newsletter/daily (subscriber only)
• POST /api/newsletter/send (subscriber only)
• POST /api/razorpay/order
• POST /api/razorpay/activate
• GET /api/cron/hourly