HTML to Markdown API

Convert HTML to clean Markdown -- strips scripts/styles, preserves headings, links, lists, images. Pay-per-call via x402 (USDC on Base L2) -- no API key, no signup, no rate-limit wall.

Part of the klymax402 marketplace -- 100 x402 micropayment APIs for AI agents, one wallet, USDC on Base.

Quickstart -- MCP

Add to your MCP client config (Claude Desktop, Cursor, ElizaOS, etc.):

{
  "mcpServers": {
    "html-to-markdown": {
      "url": "https://html-to-markdown.api.klymax402.com/mcp"
    }
  }
}

Quickstart -- HTTP (x402)

curl -X POST "https://html-to-markdown.api.klymax402.com/api/convert" \
  -H "Content-Type: application/json" \
  -d '{"html":"..."}'
# -> 402 Payment Required, with an x402 payment challenge in the response body

Any x402-aware client (@x402/fetch, x402-agent-tools, ATXP) handles the 402 -> sign -> retry cycle automatically.

Tools

Tool	Method	Path	Price	Description
text_convert_html_to_markdown	POST	/api/convert	$0.003	Convert HTML to markdown

text_convert_html_to_markdown

Use this when you need to convert HTML to clean Markdown text. Returns the converted markdown in JSON.

Parameters

Name	Type	Required	Description
html	string	yes	HTML content to convert to markdown

Example response:

{"markdown":"# Hello World\n\nThis is **bold** and *italic*.\n\n[Link](https://example.com)","inputLength":156,"outputLength":68,"strippedElements":["script","style"]}

When to use: converting web content to LLM-friendly format, migrating CMS content, cleaning up HTML emails, and preparing content for markdown-based systems.

Not for: markdown to HTML (use text_convert_markdown_to_html), web scraping (fetching + converting) (use web_scrape_to_markdown), PDF generation (use document_generate_pdf).

Example agent prompts

• "Convert HTML to clean Markdown text"

Payment

• Protocol: x402 -- HTTP-native pay-per-call, no signup, no API key
• Network: Base L2 (eip155:8453)
• Asset: USDC
• Facilitator: Coinbase CDP (primary), PayAI (fallback)
• Also reachable via ATXP (OAuth-wrapped x402, RFC 9728 protected-resource metadata)

Part of klymax402

100 x402 micropayment APIs for AI agents -- one wallet, USDC on Base, zero signup.

• Catalog: https://klymax402.com/llms.txt
• Full API reference: https://klymax402.com/llms-full.txt
• Live stats: https://klymax402.com/stats

License

MIT