The response contains a result for multiple sub-operations, each with its own status.
207 Multi-Status is a WebDAV extension. When a single request operates on multiple resources (like a batch update), the response body contains an XML or JSON document where each sub-operation has its own status code. Some non-WebDAV APIs adopt 207 for batch endpoints, though 200 with a JSON body of per-item results is more common.
When servers should return it: Return 207 from batch endpoints where individual items can succeed or fail independently. The response body must enumerate per-item statuses.
HTTP/2 207
content-type: application/xml
<?xml version="1.0"?>
<d:multistatus xmlns:d="DAV:">
<d:response><d:href>/a</d:href><d:status>HTTP/1.1 200 OK</d:status></d:response>
<d:response><d:href>/b</d:href><d:status>HTTP/1.1 404 Not Found</d:status></d:response>
</d:multistatus>
For a one-page reference of all HTTP status codes, see the HTTP cheat sheet. For testing API responses, try the API Tester tool. For inspecting responses on the command line, the curl cheat sheet covers the most common flags.