Markdown to HTML API

Convert Markdown to clean HTML -- headings, lists, code blocks, tables, links, images. Optional full document wrap. 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": {
    "markdown-to-html": {
      "url": "https://markdown-to-html.api.klymax402.com/mcp"
    }
  }
}

Quickstart -- HTTP (x402)

curl -X POST "https://markdown-to-html.api.klymax402.com/api/convert" \
  -H "Content-Type: application/json" \
  -d '{"markdown":"..."}'
# -> 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_markdown_to_html	POST	/api/convert	$0.003	Convert markdown text to HTML

text_convert_markdown_to_html

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

Parameters

Name	Type	Required	Description
markdown	string	yes	Markdown text to convert
wrapInDocument	boolean	no	Wrap output in full HTML document (default: false)

Example response:

{"html":"<h1>Hello World</h1>\n<p>This is <strong>bold</strong> and <em>italic</em>.</p>","inputLength":42,"outputLength":68}

When to use: rendering markdown content in web apps, converting README files, building documentation pages, and email template generation from markdown.

Not for: HTML to markdown (use text_convert_html_to_markdown), styled HTML with CSS themes (use text_render_markdown), PDF generation (use document_generate_pdf).

Example agent prompts

• "Convert Markdown text to clean HTML"

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