compress_file

compress

Reduce a file's size while keeping its format and reasonable quality. Best for images (png/jpg/jpeg/webp/gif) and media (mp4/mp3/wav) — the file is re-encoded at a smaller size. Provide file_url or file_base64 + filename.

When to use: A file is too big for an upload limit or an email, and the format must stay the same. Best on png/jpg/jpeg/webp/gif and mp4/mp3/wav.
Not for: Changing the format — convert_file does that, and converting an image to webp usually shrinks it further than compressing the original format. Zipping several files (there is no archive tool here).
Returns: A signed download URL for the re-encoded file, with its new size so you can report the saving.

Parameters

Name	Type	Required	Description
file_url	string	no	Public http(s) URL of the input file (preferred).
file_base64	string	no	Base64 of a small inline input file (<=15MB). Provide 'filename'.
filename	string	no	Original filename incl. extension (its extension is kept as the output format), e.g. 'photo.jpg'.
mime_type	string	no	Optional MIME type of the input.

Example call

JSON-RPC tools/call body (sent to https://convertfleet.com/api/mcp):

{
  "jsonrpc": "2.0", "id": 1, "method": "tools/call",
  "params": { "name": "compress_file", "arguments": {
               "file_url": "https://example.com/input"
             } }
}

Connect first

curl -sN https://convertfleet.com/api/mcp \
  -H "Authorization: Bearer flt_YOUR_KEY" \
  -H "Content-Type: application/json" \
  -H "Accept: application/json, text/event-stream" \
  -d '{"jsonrpc":"2.0","id":1,"method":"tools/list","params":{}}'

See the quickstarts for Hermes, Claude, Cursor, OpenClaw, n8n, Zapier and Make.