# PostToSource > Convert social posts and articles — Twitter/X threads, LinkedIn posts, Medium, Substack and Beehiiv articles, and public Notion pages — into clean, AI-ready sources: PDF for humans and NotebookLM, markdown for agents and pipelines. PostToSource is built for turning individual, publicly accessible posts you are authorized to view into personal-reference copies (see /terms, "Personal-Use Conversion"). It is not a bulk scraper, archiver, or dataset builder. ## For AI agents (pay-per-call API, no API key) - Agent guide: https://www.posttosource.com/agents - Endpoint: POST https://api.posttosource.com/api/x402/extract — body {"url": ""}, returns {markdown, title, author, wordCount, sourceUrl, platform} - Price: $0.01 USDC per successful call via the x402 protocol (Base mainnet, exact scheme, gasless for the payer). Unpaid requests receive a 402 with machine-readable payment options. Failed extractions are not charged. - OpenAPI spec: https://api.posttosource.com/openapi.json - x402 manifest: https://api.posttosource.com/.well-known/x402 - Free capability check: GET https://api.posttosource.com/api/x402/extract ## For humans - App: https://www.posttosource.com (paste a link, get a clean PDF; free tier available, Pro $15/mo or $9/mo billed annually) - Guides: https://www.posttosource.com/guides — e.g. /guides/linkedin-posts-to-pdf, /guides/substack-to-pdf, /guides/medium-articles-to-pdf, /guides/twitter-thread-to-pdf - Blog: https://www.posttosource.com/blog - Pricing: https://www.posttosource.com/pricing - Terms: https://www.posttosource.com/terms ## Company PostToSource is an OverXceed Ltd product. Contact: robin@overxceed.com