Telegram error 400: Bad Request: wrong file identifier/HTTP URL specified
Last verified against Telegram Bot API reference
Bad Request: wrong file identifier/HTTP URL specifiedWhat error 400 means
A send method (sendPhoto, sendDocument, sendVideo and so on) received a string in the file parameter that Telegram could interpret neither as a valid file_id nor as a fetchable HTTP URL. The Bot API accepts three things for a file: a file_id of a file already on Telegram's servers, an HTTP(S) URL for Telegram to download, or a multipart upload. Anything else produces this error.
Common triggers are a local filesystem path sent as a string (Telegram sees /tmp/photo.jpg and cannot use it), a file_unique_id used instead of a file_id, or a URL that is syntactically valid but points to a host Telegram could not reach in time.
Sibling descriptions exist for related cases: wrong remote file identifier specified (an ID that is the right shape but does not resolve), invalid file HTTP URL specified and failed to get HTTP URL content.
What it looks like
{"ok":false,"error_code":400,"description":"Bad Request: wrong file identifier/HTTP URL specified"}Why it happens
- A local path or relative path was passed as a string instead of uploading with multipart/form-data.
file_unique_idwas stored and later sent in place offile_id.- The URL lacks a scheme, contains spaces, or uses a non-HTTP protocol.
- The URL is behind authentication, a redirect chain, or a host unreachable from Telegram's servers.
How to fix Telegram error 400
- 1For local files, open the file and send it as multipart (your library's
InputFileor equivalent). - 2Check the stored value: file_ids are long and method-specific; file_unique_ids are short and cannot be used for sending.
- 3Fetch the URL yourself with
curl -Ifrom a public host to confirm it returns 200 with a proper Content-Type. - 4For photo URLs, keep the file under 5 MB, or 20 MB for other types, as documented for URL sending.
How to stop it recurring
Store file_id for resends and file_unique_id only for deduplication. Prefer uploading once and reusing the returned file_id over repeated URL sends. Put public media on a host that serves stable, direct, unauthenticated URLs with correct MIME types.
All size ceilings for the three sending paths (URL, multipart upload, file_id reuse) are collected under file and media limits. If the URL parses but Telegram's fetch fails, the response is failed to get HTTP URL content; if the identifier decodes but does not resolve, it is wrong remote file identifier specified. The trio together tells you which stage of file resolution broke.
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?
A send method ( sendPhoto , sendDocument , sendVideo and so on) received a string in the file parameter that Telegram could interpret neither as a valid file_id nor as a fetchable HTTP URL. The Bot API accepts three things for a file: a file_id of a file already on Telegram's servers, an HTTP(S) URL for Telegram to download, or a multipart upload. Anything else produces this error.
How do I fix Telegram error 400?
1. For local files, open the file and send it as multipart (your library's InputFile or equivalent). 2. Check the stored value: file_ids are long and method-specific; file_unique_ids are short and cannot be used for sending. 3. Fetch the URL yourself with curl -I from a public host to confirm it returns 200 with a proper Content-Type. 4. For photo URLs, keep the file under 5 MB, or 20 MB for other types, as documented for URL sending.
Should I retry after error 400?
No. Retrying the same request produces the same error; the condition has to be fixed first. Treat it as a permanent failure for that message and surface it, rather than looping.
Stop debugging Telegram by hand
Connect the channel through Conferbot: tokens, webhooks and retries are handled, failures show as readable status.