curl --request POST \
  --url https://api.iotools.cloud/v1/tool/markdown-outline-extractor \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "markdown": "# Getting Started\n\nSome intro text.\n\n## Installation\n\n```markdown\n# Not a heading (inside a code fence)\n```\n\n## Usage\n\n### Advanced Usage\n"
}
'

{
  "tool": "markdown-outline-extractor",
  "tool_version": "1.0.1",
  "outputs": {
    "outline": [
      {
        "level": "1",
        "heading": "Getting Started",
        "anchor": "getting-started",
        "line": "1"
      },
      {
        "level": "2",
        "heading": "Installation",
        "anchor": "installation",
        "line": "5"
      },
      {
        "level": "2",
        "heading": "Usage",
        "anchor": "usage",
        "line": "11"
      },
      {
        "level": "3",
        "heading": "Advanced Usage",
        "anchor": "advanced-usage",
        "line": "13"
      }
    ]
  },
  "credits_used": 3,
  "credits_remaining": null
}