Newsletter & Campaign Copy Suite

Newsletter & Campaign Copy Suite — Write a whole campaign with one API: generate subject-line headlines, calls-to-action, summaries for previews, rewritten variants, SEO metadata, and FAQ blocks.

📨 LLM-powered (OpenRouter)

🚀 Newcomer launch pricing — limited-time introductory rates while we earn our first reviews.

Built for email marketers, content and growth teams, newsletter creators.

Why this exists

Producing campaign copy — subjects, CTAs, summaries, variants — means bouncing between several single-purpose AI writers.

What you get

One API key writes every piece of campaign copy from a short brief — the newsletter content engine.

Endpoints (6 total)

• POST /v1/headline/generate
• POST /v1/cta/generate
• POST /v1/summary/generate
• POST /v1/variant/paraphrase
• POST /v1/seo/generate
• POST /v1/faq/generate

Sample request

curl -X POST https://api-newsletter-suite.knowlez.com/v1/headline/generate -H "X-API-Key: <your-key>" -H "Content-Type: application/json" -d '{}'

Pricing

• Starter — $9/mo · 2,000 ops included · $0.003/op overage
• Pro — $29/mo · 20,000 ops included · $0.002/op overage
• Scale — $99/mo · 200,000 ops included · $0.001/op overage

Swagger / OpenAPI: api-newsletter-suite.knowlez.com/docs