jackwener/OpenCLI · error · ArgumentError

Unsupported host: ${host}

Error message

Unsupported host: ${host}

What it means

Thrown by parseInstagramMediaTarget when the URL host is neither instagram.com nor a subdomain of it (INSTAGRAM_HOST_SUFFIX). The library only processes links hosted on Instagram domains.

Source

Thrown at clis/instagram/download.js:60

}
export function parseInstagramMediaTarget(input) {
    const raw = String(input || '').trim();
    if (!raw) {
        throw new ArgumentError('Instagram URL is required', 'Expected https://www.instagram.com/p/... or https://www.instagram.com/reel/...');
    }
    let url;
    try {
        url = new URL(raw);
    }
    catch {
        throw new ArgumentError(`Invalid Instagram URL: ${raw}`, 'Expected https://www.instagram.com/p/<shortcode>/ or /reel/<shortcode>/');
    }
    if (!['http:', 'https:'].includes(url.protocol)) {
        throw new ArgumentError(`Unsupported URL protocol: ${url.protocol}`);
    }
    const host = url.hostname.toLowerCase();
    if (host !== INSTAGRAM_HOST_SUFFIX && !host.endsWith(`.${INSTAGRAM_HOST_SUFFIX}`)) {
        throw new ArgumentError(`Unsupported host: ${host}`, 'Only instagram.com URLs are supported');
    }
    const segments = url.pathname.split('/').filter(Boolean);
    let kind;
    let shortcode;
    if (segments.length >= 2 && SUPPORTED_KINDS.has(segments[0])) {
        kind = segments[0];
        shortcode = segments[1];
    }
    else if (segments.length >= 3 && SUPPORTED_KINDS.has(segments[1])) {
        kind = segments[1];
        shortcode = segments[2];
    }
    if (!kind || !shortcode) {
        throw new ArgumentError(`Unsupported Instagram media URL: ${raw}`, 'Only /p/<shortcode>/, /reel/<shortcode>/, and /tv/<shortcode>/ links are supported');
    }
    if (!shortcodeToMediaId(shortcode)) {
        throw new ArgumentError(`Invalid Instagram shortcode: ${shortcode}`, 'Copy the link straight from the post, without escaping it');
    }

View on GitHub (pinned to 49907e53dc)

Solutions

1. Use a URL whose host is instagram.com or a subdomain like www.instagram.com
2. Correct any domain typos
3. Open the post in the official app/site and copy the canonical link

Example fix

// before
https://imginn.com/p/Cxyz123/
// after
https://www.instagram.com/p/Cxyz123/

const u = new URL(raw);
const h = u.hostname.toLowerCase();
if (h !== 'instagram.com' && !h.endsWith('.instagram.com')) throw new Error('Only instagram.com URLs are supported');

function isInstagramHost(v) {
  try { const h = new URL(v).hostname.toLowerCase(); return h === 'instagram.com' || h.endsWith('.instagram.com'); } catch { return false; }
}

try {
  await igDownload(raw);
} catch (e) {
  if (e.name === 'ArgumentError' && /Unsupported host/.test(e.message)) {
    console.error('Open the post on instagram.com and copy the canonical link.');
  } else throw e;
}

When it happens

Trigger: Passing a URL from another service (e.g. instagramez.com, fake-phishing mirror, imginn mirror, or a totally different site) to the Instagram download command.

Common situations: Using third-party Instagram viewer/mirror sites; typos in the domain (instagrarn.com); pasting a link to an embed or proxy service; phishing lookalike domains.

Related errors

• Invalid 1688 store URL
• --url must be a Discord channel URL like https://discord.com
• --url must be a Discord thread/post URL like https://discord
• id not a valid Grok URL (got "${input}")
• event query parameter must be a numeric event id

AI-assisted analysis of jackwener/OpenCLI@49907e53dc (2026-08-29). Data as JSON: /api/errors/b749a2ab3b39bc15. Report an issue: GitHub.