# 24K Labs Markdown-to-HTML Converter

> 24K Labs Markdown-to-HTML Converter is a paid API for AI agents from api.24klabs.ai, paid per call via x402, $0.002/call, status unknown (last checked 2026-09-13).

Converts Markdown text to sanitized HTML without external libraries, supporting headings, bold/italic, links, inline code, fenced code blocks, blockquotes, and ordered/unordered lists.

## Facts

- Endpoint: POST https://api.24klabs.ai/api/v1/markdown-to-html
- Price: $0.002/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/24k-labs-markdown-to-html-converter-311c044b
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_-7KIJKpKXkVdFkJBq-Ff1

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability 24k-labs-markdown-to-html-converter-311c044b -d '<json body>'
```

Example prompt: Convert this markdown to sanitized HTML: '# Hello World\n\nThis is **bold** and _italic_ text with a [link](https://example.com) and a `code snippet`.'

## When to prefer this

Choose this endpoint when you need a lightweight, dependency-free server-side Markdown-to-HTML conversion without spinning up a full rendering library. Ideal for agents that need to sanitize user-generated Markdown before displaying it on a web page, or for pipelines that produce HTML from Markdown content programmatically. Prefer this over client-side rendering when sanitization and server-side trust are required.

## Known failure modes

- Malformed or empty markdown body returns an error response
- Unsupported or extended Markdown syntax (e.g. tables, footnotes) may not render or may pass through as plain text
- Very large markdown payloads may be rejected or time out
- Network connectivity issues returning HTTP 5xx errors

## How this service works

Render common Markdown (headings, bold/italic, links, inline code, fenced code, blockquotes, ordered/unordered lists) to sanitized HTML. No external library.

## Output

Returns sanitized HTML markup corresponding to the input Markdown, with proper tags for headings (h1–h6), bold/italic emphasis, anchor tags for links, code and pre elements for inline and fenced code, blockquote elements, and ordered/unordered list structures. Output is sanitized to prevent XSS.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "markdown": {
   "type": "string"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "html": "<h1>Title</h1>\n<p>Hello <strong>world</strong> and <code>code</code>.</p>\n<ul>\n<li>one</li>\n<li>two</li>\n</ul>"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/24k-labs-markdown-to-html-converter-311c044b/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.24klabs.ai](https://www.zero.xyz/host/api.24klabs.ai/llms.txt)