Markdown to HTML API Reference

Overview

Perfect for CMSs, blog platforms, documentation sites, and any application requiring markdown content rendering in HTML format.

Endpoint

One host, one path per API. The block below shows this call in four languages; every one of them is the same HTTP request. Making requests covers the timeouts, retries and parameter rules that apply to all of them. The SDKs wrap the same call in a typed client.

POSThttps://api.apiverve.com/v1/markdowntohtml

curl -X POST https://api.apiverve.com/v1/markdowntohtml \
  -H "x-api-key: your_api_key_here" \
  -H "Content-Type: application/json" \
  -d '{
  "markdown": "# Hello World\n\nThis is a **bold** statement and this is *italic*.\n\n## Features\n\n- Easy to use\n- Fast conversion\n- Supports common markdown syntax\n\n[Link to example](https://example.com)"
}'

const res = await fetch('https://api.apiverve.com/v1/markdowntohtml', {
  method: 'POST',
  headers: {
    'x-api-key': 'your_api_key_here',
    'Content-Type': 'application/json',
  },
  body: JSON.stringify({
  "markdown": "# Hello World\n\nThis is a **bold** statement and this is *italic*.\n\n## Features\n\n- Easy to use\n- Fast conversion\n- Supports common markdown syntax\n\n[Link to example](https://example.com)"
}),
});

if (!res.ok) throw new Error(`${res.status} ${await res.text()}`);

const { data } = await res.json();
console.log(data);

import requests

res = requests.post(
    "https://api.apiverve.com/v1/markdowntohtml",
    headers={"x-api-key": "your_api_key_here"},
    json={
    "markdown": "# Hello World\n\nThis is a **bold** statement and this is *italic*.\n\n## Features\n\n- Easy to use\n- Fast conversion\n- Supports common markdown syntax\n\n[Link to example](https://example.com)"
},
    timeout=15,
)
res.raise_for_status()

print(res.json()["data"])

package main

import (
	"fmt"
	"io"
	"net/http"
	"strings"
)

func main() {
	body := strings.NewReader(`{
  "markdown": "# Hello World\n\nThis is a **bold** statement and this is *italic*.\n\n## Features\n\n- Easy to use\n- Fast conversion\n- Supports common markdown syntax\n\n[Link to example](https://example.com)"
}`)
	req, _ := http.NewRequest("POST", "https://api.apiverve.com/v1/markdowntohtml", body)
	req.Header.Set("Content-Type", "application/json")
	req.Header.Set("x-api-key", "your_api_key_here")

	res, err := http.DefaultClient.Do(req)
	if err != nil {
		panic(err)
	}
	defer res.Body.Close()

	out, _ := io.ReadAll(res.Body)
	fmt.Println(string(out))
}

Replace your_api_key_here with the key from your dashboard. When the inputs arrive as a list rather than one at a time, batch requests run up to 200 of them through this same API in a single call.

Authentication

Send your key in the x-api-key header. That is the only auth step — there is no token exchange and no per-endpoint scope to configure. Authentication covers creating, rotating and revoking keys.

401 is the only auth verdict

A 401 means the key is missing, invalid or expired. A 403 means the key is valid but not permitted here — blocked by a key restriction or an IP allow-list. Running out of credits is a 429.

Parameters

Sent as JSON in the request body. Premium parameters are accepted on every plan but only take effect on plans that include them.

Parameter	Type	Description
`markdown`Required	string	Markdown text to convert (max 100,000 characters)

Response

Every API returns the same three top-level keys, so one response handler covers your whole integration: status, error and data. Only data changes shape. Response format covers the envelope, the other output formats and how premium fields are withheld.

Sample response

{
  "status": "ok",
  "error": null,
  "data": {
    "html": "<h1>Hello World</h1>\n<p>This is a <strong>bold</strong> statement and this is <em>italic</em>.</p>\n<h2>Features</h2>\n<ul>\n<li>Easy to use</li>\n<li>Fast conversion</li>\n<li>Supports common markdown syntax</li>\n</ul>\n<p><a href=\"https://example.com\">Link to example</a></p>\n",
    "markdownLength": 185,
    "htmlLength": 272
  }
}

Response fields

Paths are relative to data. Premium fields are absent rather than zeroed on plans that do not include them, so check for presence instead of comparing to 0.

Field	Type	Example	Description
`html`	string	`"<h1>Hello World</h1> <p>This is a <strong>bold</strong> statement and this is <em>italic</em>.</p> <h2>Features</h2> <ul> <li>Easy to use</li> <li>Fast conversion</li> <li>Supports common markdown syntax</li> </ul> <p><a href="https://example.com">Link to example</a></p> "`	Converted markdown content as valid semantic HTML
`markdownLength`Premium	number	`185`	Character count of the input markdown text
`htmlLength`Premium	number	`272`	Character count of the generated HTML output

Errors

Read the HTTP status first, then error for the specific reason. The body names the parameter that has to change. Error handling covers the full status list and which of them are worth retrying.

Status	Meaning	What to do
`400`	Input was rejected	Read `error`; it names the parameter.
`401`	Key missing or invalid	Check the header name and the key value.
`403`	Key valid, but not permitted	A key restriction or IP allow-list; see key scoping.
`429`	Rate limited, or out of credits	Read `error` to tell them apart; see rate limits.

Use cases

Content Management: Convert markdown content to HTML for CMS platforms
Blog Rendering: Render markdown blog posts as HTML for web display
Documentation Sites: Convert markdown documentation to HTML for static site generators
Email Templates: Generate HTML emails from markdown-formatted content

Other ways to use Markdown to HTML

Set up Markdown to HTML on APIVerve, or reach the same source a different way. Your APIVerve account and credits work on all of them — one key, one balance.

Give it to an AI agentConnect over MCP and your agent calls it as a native tool — Claude, Cursor, ChatGPT.VerveKit →Reference →

Markdown to HTML