Mastering the Markdown Endpoint

Web pages are full of noise — navigation, ads, sidebars, and boilerplate. When all you need is the content, the /extract/markdown endpoint fetches any public URL, strips the cruft, and returns clean, well-formatted Markdown.

Use it for:

• Building content aggregation or read-it-later apps.
• Preparing web content for LLM processing and RAG pipelines.
• Converting blog posts or articles into a stable, storable format.
• Powering documentation and content management systems.

Prerequisites & Authentication

You’ll need a Tabstack API key. Get one by signing up at https://tabstack.ai.

Install the SDK:

TypeScript

npm install @tabstack/sdk

Python

pip install tabstack

curl

export TABSTACK_API_KEY="your-api-key-here"

The SDK reads TABSTACK_API_KEY from your environment automatically.

The Basic Request

TypeScript

import Tabstack from '@tabstack/sdk'

const client = new Tabstack()

const result = await client.extract.markdown({
  url: 'https://example.com/blog/article'
})

console.log(result.content)

Python

from tabstack import Tabstack

client = Tabstack()

result = client.extract.markdown(url="https://example.com/blog/article")
print(result.content)

curl

curl -X POST https://api.tabstack.ai/v1/extract/markdown \
  -H "Authorization: Bearer $TABSTACK_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "url": "https://example.com/blog/article"
  }'

Note: The examples below use placeholder URLs like https://example.com/blog/article. Replace them with the URL of the page you want to convert.

Default Response: Content with Frontmatter

A successful request returns a JSON object. By default, the API embeds all extracted metadata (title, author, etc.) as YAML frontmatter at the top of the content.

{
  "url": "https://example.com/blog/article",
  "content": "---\ntitle: Example Article Title\ndescription: This is an example article...\nauthor: Example Author\nimage: https://example.com/images/article.jpg\n---\n\n# Example Article Title\n\nThis is the article content converted to markdown..."
}

The response includes the processed URL and the content with YAML frontmatter embedded — perfect for static site generators like Hugo or Jekyll that expect this format.

Getting Separate Metadata

YAML frontmatter is convenient, but when you need metadata as a structured JSON object — for populating databases or feeding other systems — add metadata: true to your request.

TypeScript

import Tabstack from '@tabstack/sdk'

const client = new Tabstack()

const result = await client.extract.markdown({
  url: 'https://example.com/blog/article',
  metadata: true
})

console.log(result.content)           // pure markdown, no frontmatter
console.log(result.metadata?.title)   // "Example Article Title"

Python

from tabstack import Tabstack

client = Tabstack()

result = client.extract.markdown(
    url="https://example.com/blog/article",
    metadata=True
)

print(result.content)
print(result.metadata.title if result.metadata else None)

curl

curl -X POST https://api.tabstack.ai/v1/extract/markdown \
  -H "Authorization: Bearer $TABSTACK_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "url": "https://example.com/blog/article",
    "metadata": true
  }'

Response: Clean Content + Metadata Object

With metadata: true, the response separates content and metadata into distinct fields.

{
  "url": "https://example.com/blog/article",
  "content": "# Example Article Title\n\nThis is the article content converted to markdown...",
  "metadata": {
    "title": "Example Article Title",
    "description": "This is an example article description",
    "author": "Example Author",
    "publisher": "Example Publisher",
    "image": "https://example.com/images/article.jpg",
    "site_name": "Example Blog",
    "url": "https://example.com/blog/article",
    "type": "article"
  }
}

content contains pure Markdown without frontmatter, and metadata is a structured JSON object. No YAML parsing needed.

Note: Use metadata: true for most programmatic use cases. It’s more reliable than parsing YAML, which can break if titles or descriptions contain special characters.

Forcing a Fresh Fetch

The Tabstack API caches results for a short period. For static content like blog posts, this is a performance win. For breaking news or live feeds, use nocache: true to bypass the cache.

TypeScript

import Tabstack from '@tabstack/sdk'

const client = new Tabstack()

const result = await client.extract.markdown({
  url: 'https://news-site.com/breaking-news',
  nocache: true
})

console.log(result.content)

Python

from tabstack import Tabstack

client = Tabstack()

result = client.extract.markdown(
    url="https://news-site.com/breaking-news",
    nocache=True
)

print(result.content)

curl

curl -X POST https://api.tabstack.ai/v1/extract/markdown \
  -H "Authorization: Bearer $TABSTACK_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "url": "https://news-site.com/breaking-news",
    "nocache": true
  }'

Note: Use nocache judiciously. Forcing a fresh fetch will result in slightly slower response times, as the API cannot serve the request from its cache.

Production-Ready Error Handling

The SDK raises typed exceptions for API errors, so you can handle specific failure modes without inspecting raw HTTP status codes.

Exception	Status	Cause
BadRequestError	400	Missing or malformed request body
AuthenticationError	401	API key missing, invalid, or expired
UnprocessableEntityError	422	Invalid URL or access to private resources
RateLimitError	429	Rate limit exceeded
InternalServerError	500+	Target server down or internal conversion failure

The SDK automatically retries on 429 and 500+ errors (2 attempts with exponential backoff).

Robust Error Handling Examples

TypeScript

import Tabstack, {
  AuthenticationError,
  BadRequestError,
  UnprocessableEntityError,
  RateLimitError,
  InternalServerError,
} from '@tabstack/sdk'

const client = new Tabstack()

async function getMarkdownFromUrl(url: string, forceFresh = false) {
  try {
    const result = await client.extract.markdown({
      url,
      metadata: true,
      nocache: forceFresh,
    })
    return result
  } catch (err) {
    if (err instanceof AuthenticationError) {
      console.error('Invalid API key — check TABSTACK_API_KEY')
    } else if (err instanceof UnprocessableEntityError) {
      console.error(`Invalid URL: ${url}`)
    } else if (err instanceof RateLimitError) {
      console.error('Rate limit exceeded — back off and retry')
    } else if (err instanceof BadRequestError) {
      console.error('Bad request — missing or malformed parameters')
    } else if (err instanceof InternalServerError) {
      console.error(`Server error fetching ${url}`)
    } else {
      throw err
    }
    return null
  }
}

const result = await getMarkdownFromUrl('https://example.com/article')
if (result) {
  console.log(`Title: ${result.metadata?.title}`)
  console.log(result.content)
}

Python

import logging
from tabstack import Tabstack
from tabstack import (
    AuthenticationError,
    BadRequestError,
    UnprocessableEntityError,
    RateLimitError,
    InternalServerError,
)

logging.basicConfig(level=logging.INFO, format='%(levelname)s: %(message)s')

client = Tabstack()

def get_markdown_from_url(url: str, force_fresh: bool = False):
    try:
        result = client.extract.markdown(
            url=url,
            metadata=True,
            nocache=force_fresh,
        )
        return result
    except AuthenticationError:
        logging.error("Invalid API key — check TABSTACK_API_KEY")
    except UnprocessableEntityError:
        logging.error(f"Invalid URL: {url}")
    except RateLimitError:
        logging.error("Rate limit exceeded — back off and retry")
    except BadRequestError:
        logging.error("Bad request — missing or malformed parameters")
    except InternalServerError:
        logging.error(f"Server error fetching {url}")
    return None

result = get_markdown_from_url("https://example.com/article")
if result:
    logging.info(f"Title: {result.metadata.title if result.metadata else None}")
    print(result.content)

curl

#!/bin/bash
# Requires: curl, jq

API_KEY="$TABSTACK_API_KEY"
URL_TO_FETCH="$1"

if [ -z "$API_KEY" ]; then
    echo "Error: TABSTACK_API_KEY environment variable not set." >&2
    exit 1
fi

if [ -z "$URL_TO_FETCH" ]; then
    echo "Usage: $0 <url-to-fetch>" >&2
    exit 1
fi

response=$(curl -s -w "\n%{http_code}" \
  -X POST https://api.tabstack.ai/v1/extract/markdown \
  -H "Authorization: Bearer $API_KEY" \
  -H "Content-Type: application/json" \
  --connect-timeout 10 \
  --max-time 30 \
  -d '{
        "url": "'"$URL_TO_FETCH"'",
        "metadata": true,
        "nocache": false
      }')

http_code=$(echo "$response" | tail -n1)
response_body=$(echo "$response" | sed '$d')

if [ "$http_code" -eq 200 ]; then
  echo "Success:"
  echo "$response_body" | jq .
else
  echo "Error (HTTP $http_code):" >&2
  echo "$response_body" | jq .error 2>/dev/null || echo "$response_body" >&2
  exit 1
fi

Quick Reference

Request Parameters

Parameter	Type	Required	Default	Description
url	string	Yes		The publicly accessible URL to convert.
effort	string	No	standard	Rendering effort: min, standard, or max.
metadata	boolean	No	false	If true, returns metadata as a separate object. If false, embeds metadata as YAML frontmatter in content.
nocache	boolean	No	false	If true, bypasses the cache and forces a fresh fetch.
geo_target	object	No		{ country: 'US' } — ISO 3166-1 alpha-2 country code.

Metadata Object Fields

When metadata: true is set, these fields may be present. Availability depends on what the source page provides.

Field	Type	Description
title	string	Page title from Open Graph or HTML <title>.
description	string	Page description from Open Graph or HTML meta tags.
author	string	Author information from HTML metadata.
publisher	string	Publisher name from Open Graph.
image	string	Featured image URL from Open Graph.
site_name	string	Website name from Open Graph.
url	string	Canonical URL from Open Graph.
type	string	Content type from Open Graph (e.g., "article").
created_at	string	Publication date, if available.
modified_at	string	Last modified date, if available.
keywords	string[]	Keywords or tags, if available.

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Related Resources

• API Reference: Extract Markdown Endpoint
• Quick Start Guide
• Build Your First Tabstack App