Cannot get HTTP integration to work to some endpoints [Solved]

I am trying to get a simple HTTP integration to work, and nothing I do seems to have any effect. I have three devices in my application, and they are pointed to Cayenne. All three send data to their respoective devices on TTN, I can see it in the data pane. One of the three never seems to send any data to Cayenne, and so I’m trying to debug that.

I added a second integration to http, point to a throw-away receiver at beeceptor. My settings in the integration are:
Access Key: default key
URL: https://toddstest.free.beeceptor.com/my/api/path
Method: POST
Authorization:
Custom header name:
Custom Header Value:

Nothing ever arrives at Beecepter. Posting to it via apirequest.io works just fine.

Any suggestions?

Still haven’t debugged Beceptor, but I have been able to use https://rbaskets.in/web

Note: When I send exactly the packet that rbaskets.in says that it received to Beeceptr via apirequest.io, that too works just fine. I’m at a loss.

Wild guess: TTN does not like the wildcard URL that is needed for your URL at Beeceptor.

Certificate for https://toddstest.free.beeceptor.com:

Beeceptor

For https://rbaskets.in:

Rbaskets

Sounds reasonable to me. Thanks!