topic Re: getNetworkClientsApplicationUsage returns 400! in Network Platform API

getNetworkClientsApplicationUsage returns 400!

Yaakov Neuman at NetOp AI — Fri, 18 Jul 2025 09:17:29 GMT

I'm using getNetworkClients to get the client list, then I use their IDs with getNetworkClientsApplicationUsage to their usage.

Unfortunately, a lot of times I get an error:

Message:{"errors":["One or more clients were not found"]}

I found that the "problematic" devices are Cisco devices, especially "Cisco Meraki".

When I remove from the client list all the devices with manufacturer starts with "Cisco", I don't get this error anymore.

a. Is this familiar?

b. Is there any official way to use the endpoint getNetworkClientsApplicationUsage?

Re: getNetworkClientsApplicationUsage returns 400!

Raphael_L — Fri, 18 Jul 2025 12:34:21 GMT

You shouldn't have Cisco Meraki devices listed in your Network Clients unless they are from a different dashboard Network.

Re: getNetworkClientsApplicationUsage returns 400!

Yaakov Neuman at NetOp AI — Sun, 20 Jul 2025 15:37:28 GMT

The main issue is why do I get the Cisco devices in the list, while I cannot get info about them in the application endpoint or the usage history endpoint.

Or at least if those endpoint can return the list of the problematic clients I can remove them from the request and send new request.

Re: getNetworkClientsApplicationUsage returns 400!

Philip D'Ath — Sun, 20 Jul 2025 21:11:03 GMT

Devices with very low usage may not show up as having usage int he API. This is expected behaviour.

Re: getNetworkClientsApplicationUsage returns 400!

Yaakov Neuman at NetOp AI — Tue, 22 Jul 2025 14:59:36 GMT

I don't care if a device usage show or not. The main problem is that in this case I get 400 and don't get usage of any client!! This is definitely not expected behaviour.

If only there was a detail within the error which clients were not found, I could remove them from the list and request the usage again.

Re: getNetworkClientsApplicationUsage returns 400!

obrigg — Tue, 22 Jul 2025 15:17:33 GMT

Yaakov, did you open a support case about this problem?

Re: getNetworkClientsApplicationUsage returns 400!

Yaakov Neuman at NetOp AI — Tue, 22 Jul 2025 18:03:44 GMT

Yes, I did.

But like my previous case, they ask me a lot of questions, but don't provide answers.

Re: getNetworkClientsApplicationUsage returns 400!

obrigg — Tue, 22 Jul 2025 18:08:54 GMT

Can you share the case number? Or a specific API request that would result in a 400 error, so I can take a look.

Re: getNetworkClientsApplicationUsage returns 400!

Yaakov Neuman at NetOp AI — Wed, 23 Jul 2025 06:36:32 GMT

Case 13304304

I use https://api.meraki.com:443/api/v1/networks/L_xxxx/clients to get the client list.

Then I take their IDs (for example: k09fefe,k09fe1e,k09fe1f,k09fe20,k09fe21,k09fe32) .

Then I use https://api.meraki.com:443/api/v1/networks/L_xxxx/clients/applicationUsage?t0=1753172549&t1=1753173549&clients=k09fefe,k09fe1e,k09fe1f,k09fe20,k09fe21,k09fe32 to get their usage.

The last call returns with 400 and the error message "One or more clients were not found"

Re: getNetworkClientsApplicationUsage returns 400!

obrigg — Wed, 23 Jul 2025 12:32:48 GMT

I see. Assuming you’re using the same timespan, maybe one of these clients had no traffic during that time.

If you’re listing all clients, would it make more sense to use getNetworkTraffic?

Re: getNetworkClientsApplicationUsage returns 400!

Yaakov Neuman at NetOp AI — Thu, 24 Jul 2025 05:57:47 GMT

We need the clients and their usage.

How getNetworkTraffic can help us? It just tell me how many client used an application, but don't give me the client list.

The problem I found is a bug in Meraki, and it should be fix. Or at least to give instruction how to use the endpoints without getting error code 400.

Re: getNetworkClientsApplicationUsage returns 400!

obrigg — Thu, 24 Jul 2025 06:07:07 GMT

The API call you are trying to make would return aggregated information, I don’t see much difference.
Can you perhaps explain the use-case, the data you’re trying to obtain, and how it would be used?

Re: getNetworkClientsApplicationUsage returns 400!

Yaakov Neuman at NetOp AI — Sun, 27 Jul 2025 19:14:16 GMT

I would like to get as much as we can information about the clients, and look for correlation between client activity and network issues.

For that I need an API with the client usage and activity. The list of application and their usage are not relevant for my case.

Re: getNetworkClientsApplicationUsage returns 400!

John-on-API — Tue, 29 Jul 2025 16:31:03 GMT

So is https://developer.cisco.com/meraki/api-v1/get-network-clients-usage-histories/ the more relevant operation to your use case?

Re: getNetworkClientsApplicationUsage returns 400!

Yaakov Neuman at NetOp AI — Tue, 29 Jul 2025 18:11:21 GMT

1. I use both operations: getNetworkClientsUsageHistories and getNetworkClientsApplicationUsage.

2. getNetworkClientsUsageHistories also has the same problem with the same Cisco clients.

It happened when I used timespan=1000 and when I used timespan=7200.

In the case I opened, I put all the needed information (net ID, client IDs), but I got strange responses from the support team.

As far as I understand, there is a bug in those 2 endpoints. There are 2 options to fix it:

1. Remove the problematic devices from the client list of getNetworkClients.

2. Or ignore the problematic clients when responding to getNetworkClientsUsageHistories or getNetworkClientsApplicationUsage.

If the Meraki R&D team has a better solution - welcome!

p.s. I found a real bug. Why does no one give me kudos?