apps/docs/content/troubleshooting/edge-function-404-error-response.mdx
The edge function is not recognized by Supabase
If the Supabase Edge Function Runtime does not recognize the function specified in the URL endpoint:
https://PROJECT_REF.supabase.co/functions/v1/UNRECOGNIZED_FUNCTION_NAME
then the runtime will return a 404 error.
If the tests return a 404 but don't match the criteria below, the error is coming from your app logic, not the JWT check.
</Admonition>Platform 404 errors cannot be detected in the browser. Instead, to confirm 404s from the browser, you must check the logs instead.
Browsers misreport 404s as generic CORS errors. As a result, the Supabase JavaScript client surfaces only a generic message: Failed to send a request to the Edge Function.
When an edge function fails due to a platform 404 error, it will return the error:
{
"code": "NOT_FOUND",
"message": "Requested function was not found"
}
Always configure an appropriate time frame when using the log explorer
One cannot inspect the function dashboard to find platform 404 errors, instead, you must run the below query in the log explorer. Results will show all requests that reached Supabase but were rejected as unrecognizable.
select distinct
req.pathname as function_name,
res.status_code
from
function_edge_logs
cross join UNNEST(metadata) as metadata
cross join UNNEST(metadata.request) as req
cross join UNNEST(metadata.response) as res
where status_code = 404 and metadata.execution_id is null
limit 10;
In your code, make sure your function name doesn't have any typos, such as:
///When selecting your function in the Function Dashboard, you should have the option to make a test call:
If the call works, consider double checking your code for typos or to see if it is overwriting the function name dynamically. Otherwise, go on to step 4.
If step 3 fails, it may be a sign of an internal bug and it may be necessary to redeploy your function. This can be done within the Function Dashboard under the respective function's code tab:
Alternatively, if you develop locally, you can redeploy the function with the Supabase CLI:
supabase functions deploy FUNCTION_NAME
# If you want to deploy all functions, run the `deploy` command without specifying a function name:
supabase functions deploy
Then write in a ticket to Supabase Support