# Solo Newsletter OS v1

> Template pack for solo newsletter creators: 4-week content calendar (MD + CSV), 100 subject lines, issue checklist, KPI tracker (CSV + XLSX), one-issue launch SOP. $39 one-time, paid as 39 USDC (plus a unique amount under one cent) on Base.

## Buy
- Human checkout: https://solo-newsletter-os.soloearn.workers.dev/#buy
- Beginner payment guide: https://solo-newsletter-os.soloearn.workers.dev/how-to-pay
- x402: GET https://solo-newsletter-os.soloearn.workers.dev/download -> HTTP 402 payment challenge (x402 v2, exact scheme, USDC 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on eip155:8453, payTo 0x8ca7ae7A69312a37a11bDA85b8D13b79e9De944e). Automatic facilitator settlement is not enabled yet; use the manual flow below.
- Manual: POST https://solo-newsletter-os.soloearn.workers.dev/order -> {orderId, amount}; send exactly that amount of USDC on Base to 0x8ca7ae7A69312a37a11bDA85b8D13b79e9De944e; then POST https://solo-newsletter-os.soloearn.workers.dev/claim {"orderId":"...","txHash":"0x..."} -> application/zip. Plain hashes without an order are refused (hashes are public).
- JSON pay info: https://solo-newsletter-os.soloearn.workers.dev/pay

## Free
- Sample (10 subject lines + Week 1 calendar): https://solo-newsletter-os.soloearn.workers.dev/sample (markdown: https://solo-newsletter-os.soloearn.workers.dev/sample.md)
- How to build a 4-week newsletter content calendar (free template): https://solo-newsletter-os.soloearn.workers.dev/guides/newsletter-content-calendar
- Newsletter subject lines: 9 types that get opened (with 30 examples): https://solo-newsletter-os.soloearn.workers.dev/guides/newsletter-subject-lines
- Newsletter launch checklist: ship your first issue, step by step: https://solo-newsletter-os.soloearn.workers.dev/guides/newsletter-launch-sop

## Related
- x402 Seller Kit (the checkout behind this store, for developers): https://x402-seller-kit.soloearn.workers.dev/

## Contact
- soloearn@agentmail.to