Telegram Bot API · error code

Telegram error 400: Bad Request: failed to get HTTP URL content

RetryableHTTP 400400 Bad Request: files and media

Last verified against Telegram Bot API reference

What Telegram returns
Bad Request: failed to get HTTP URL content

What error 400 means

You passed an HTTP URL as the file parameter and Telegram's servers tried to download it but could not obtain usable content. The URL parsed correctly (otherwise you would see wrong file identifier/HTTP URL specified or invalid file HTTP URL specified); the fetch itself failed. Telegram fetches from its own infrastructure, with its own timeouts and user agent, so a URL that loads in your browser can still fail here.

This is one of the few 400s that can be transient: the host may have been slow, rate-limiting Telegram's IPs, or returning an error for that one request. It can also be permanent if the resource requires cookies, auth headers, or a referrer.

Nothing about your bot or chat is wrong.

What it looks like

{"ok":false,"error_code":400,"description":"Bad Request: failed to get HTTP URL content"}

Why it happens

  • The host requires authentication, cookies, or a signed URL that has expired.
  • The server responds slowly or with a 4xx/5xx to Telegram's fetch.
  • Hotlink protection or geo-blocking denies requests from Telegram's data centres.
  • The response is an HTML page (a login or error page) rather than the media file.

How to fix Telegram error 400

  1. 1Request the URL with a neutral client from a server (not your laptop) and check status, Content-Type and Content-Length.
  2. 2Download the file yourself and upload it to Telegram as multipart instead of passing the URL.
  3. 3Use short-lived signed URLs only if they remain valid long enough for Telegram to fetch, or avoid them entirely.
  4. 4Retry once after a short delay for hosts known to be flaky; then fall back to upload.

How to stop it recurring

For anything you control, upload once and reuse the file_id. For third-party media, proxy it through your own storage before sending. Put URL sends behind a fallback that switches to upload on this description.

Remember the URL path also has the tightest size ceilings (5 MB photos, 20 MB other content, versus 10/50 MB for uploads; see file limits), so oversized remote files can fail this way too. If the value was never a fetchable URL to begin with, the API answers with wrong file identifier/HTTP URL specified instead.

Official reference: Telegram Bot API reference. See all Telegram error codes or the Telegram limits and quotas.

Related codes

Error 400 - quick answers

What does Telegram error 400 mean?

You passed an HTTP URL as the file parameter and Telegram's servers tried to download it but could not obtain usable content. The URL parsed correctly (otherwise you would see wrong file identifier/HTTP URL specified or invalid file HTTP URL specified ); the fetch itself failed.

How do I fix Telegram error 400?

1. Request the URL with a neutral client from a server (not your laptop) and check status, Content-Type and Content-Length. 2. Download the file yourself and upload it to Telegram as multipart instead of passing the URL. 3. Use short-lived signed URLs only if they remain valid long enough for Telegram to fetch, or avoid them entirely. 4. Retry once after a short delay for hosts known to be flaky; then fall back to upload.

Can I retry after error 400?

Yes - this is a retryable condition. Back off (start around one second and double on each attempt, with jitter) and watch for a retry-after hint from the platform before resending.

Stop debugging Telegram by hand

Connect the channel through Conferbot: tokens, webhooks and retries are handled, failures show as readable status.