# FastX402 Markdown to HTML Converter

> FastX402 Markdown to HTML Converter is a paid API for AI agents from fastx402.tools, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-27).

Converts a Markdown string into rendered HTML via a pay-per-call GET request using x402 micropayments.

## Facts

- Endpoint: GET https://fastx402.tools/markdown-to-html?utm_source=zero.xyz
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-27
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/fastx402-markdown-to-html-converter-6e74ec97
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_WC7lnXfPFxOT3ktj9MFiJ

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 fastx402-markdown-to-html-converter-6e74ec97
```

Example prompt: Can you convert this markdown text to HTML for me: '# Hello World\n\nThis is **bold** and this is a [link](https://example.com).'

## When to prefer this

Choose this endpoint when you need a lightweight, no-account, no-API-key markdown-to-HTML conversion at minimal cost ($0.001 USDC). Ideal for AI agents that occasionally need to render markdown without setting up a dedicated markdown library or service account. Best suited for single-string conversions rather than batch document processing.

## Known failure modes

- Missing 'markdown' query parameter returns an error
- Extremely long markdown strings may cause request timeouts or truncation
- Payment failure via x402 protocol returns HTTP 402 before processing occurs
- Malformed or non-UTF-8 markdown may produce unexpected HTML output

## How this service works

200 pay-per-call tools for AI agents, from $0.001 per request in USDC on Base or Solana with x402. No account, no API key.

## Output

A JSON object with a single 'html' field containing the fully rendered HTML string converted from the provided markdown input, including proper tags for headings, paragraphs, bold/italic, lists, links, and code blocks.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [
      "markdown"
     ],
     "properties": {
      "markdown": {
       "type": "string",
       "description": "Markdown text"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object",
     "properties": {
      "html": {
       "type": "string"
      }
     }
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "html": "<h1>FastX402</h1>\n<p>Pay-per-call <strong>tools</strong> for agents.</p>\n<ul>\n<li>dns</li>\n<li>qr-code</li>\n</ul>\n"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/fastx402-markdown-to-html-converter-6e74ec97/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from fastx402.tools](https://www.zero.xyz/host/fastx402.tools/llms.txt)