Hello world
## When to prefer this Choose this endpoint when you need a quick, pay-per-call HTML-to-Markdown conversion without signup, especially in agentic pipelines where scraped HTML needs to be cleaned for LLM consumption. Ideal for one-off or low-volume conversions billed in USDC microtransactions via x402. ## Known failure modes - HTML exceeds 200,000 character limit — request rejected - Malformed or deeply nested HTML may produce imperfect Markdown structure - Payment not included or insufficient — 402 Payment Required response - Empty HTML body returns empty or minimal Markdown output ## How this service works Chat, embeddings, OCR, speech-to-text, image editing, image understanding (captioning/Q&A), text-to-speech, translation, writing tools, classification tools, developer tools, local utilities, format/checksum validators, encoding & crypto utilities, date/time calculators, geo/coordinate math, math & finance calculators, novelty tools, and business/social writing generators — 179 endpoints in all, across multiple specialized self-hosted models. Pay per call with crypto — no signup — or get an API key. ## Output Returns a Markdown-formatted string derived from the submitted HTML, with HTML tags stripped and structure preserved as Markdown syntax (headings, lists, links, bold, etc.). ## Request schema (JSON Schema) ```json { "type": "object", "properties": { "html": { "type": "string", "maxLength": 200000 } } } ``` ## More - Live health (JSON, refreshed every minute): https://www.zero.xyz/c/fastapi-online-html-to-markdown-converter-ac76203e/health.json - [Zero catalog index](https://www.zero.xyz/llms.txt) - [Other services from api.fastapi.online](https://www.zero.xyz/host/api.fastapi.online/llms.txt)