# Failed to register pmm-agent on PMM Server: **URL:** \ **Category:** PMM 3.x\ **Created:** [February 12, 2025, 5:19am UTC](https://forums.percona.com/t/failed-to-register-pmm-agent-on-pmm-server/36650 "2025-02-12T05:19:34Z")\ **Posts on this page:** 6\ **Page:** 1
**Author:** ![nkefor](https://avatars.discourse-cdn.com/v4/letter/n/e8c25b/32.png) [@nkefor](https://forums.percona.com/u/nkefor)\ **Post date:** [February 12, 2025, 5:19am UTC](https://forums.percona.com/t/failed-to-register-pmm-agent-on-pmm-server/36650/1 "2025-02-12T05:19:35Z")
I have installed PMM server and it is running, but I’m unable to establish a connection between the server and the client as I’m getting the following error Failed to register pmm-agent on PMM Server: Endpoint not found: /v1/management/Node/Register, http method: POST. ---
**Author:** ![lalit.choudhary](https://sea1.discourse-cdn.com/flex019/user_avatar/forums.percona.com/lalit.choudhary/32/51_2.png) [@lalit.choudhary](https://forums.percona.com/u/lalit.choudhary)\ **Post date:** [February 12, 2025, 5:34am UTC](https://forums.percona.com/t/failed-to-register-pmm-agent-on-pmm-server/36650/2 "2025-02-12T05:34:28Z")
Hello @nkefor To resolve this, Please check pmm-server HOST and Port connectivity from client host. You will find more details here: [Resolve issues - Percona Monitoring and Management](https://docs.percona.com/percona-monitoring-and-management/2/how-to/troubleshoot.html#client-server-connections) Ref: Register your client node with PMM Server: > **[Percona Monitoring and Management - Set up PMM Client](https://docs.percona.com/percona-monitoring-and-management/2/setting-up/client/index.html#register)** > > There are different ways to install PMM Client on a node and register it with PMM Server. Choose from: ---
**Author:** ![nkefor](https://avatars.discourse-cdn.com/v4/letter/n/e8c25b/32.png) [@nkefor](https://forums.percona.com/u/nkefor)\ **Post date:** [February 12, 2025, 6:18am UTC](https://forums.percona.com/t/failed-to-register-pmm-agent-on-pmm-server/36650/3 "2025-02-12T06:18:59Z")
> [@lalit.choudhary](#): > > check pmm-server HOST and Port connectivity from client host Hello, Please be more specific. How do I check pmm-server HOST and Port connectivity from client host? The pmm-server is working and I’m able to access it. There is no other service running on the server where I installed pmm-server that could be using port 443. ---
**Author:** ![lalit.choudhary](https://sea1.discourse-cdn.com/flex019/user_avatar/forums.percona.com/lalit.choudhary/32/51_2.png) [@lalit.choudhary](https://forums.percona.com/u/lalit.choudhary)\ **Post date:** [February 12, 2025, 7:01am UTC](https://forums.percona.com/t/failed-to-register-pmm-agent-on-pmm-server/36650/4 "2025-02-12T07:01:26Z")
Hello @nkefor > How do I check pmm-server HOST and Port connectivity from client host? So you are getting this error while registering your client node with PMM Server. You can check connectivity between pmm-client and pmm-server using telnet. If connectivity is there, check below details for further troubleshooting, Check the pmm-server services status. `$ sudo docker exec -it pmm-server supervisorctl status` pmm-admin config **–debug** output to check more details on why it Failed to register pmm-agent on PMM Server. `pmm-admin config --server-insecure-tls --server-url=https://:@:443 --debug` Please also share pmm-server and pmm-admin --version details. ---
**Author:** ![Ananias\_Tsalouchidis](https://sea1.discourse-cdn.com/flex019/user_avatar/forums.percona.com/ananias_tsalouchidis/32/10841_2.png) [@Ananias\_Tsalouchidis](https://forums.percona.com/u/Ananias_Tsalouchidis)\ **Post date:** [February 12, 2025, 1:02pm UTC](https://forums.percona.com/t/failed-to-register-pmm-agent-on-pmm-server/36650/5 "2025-02-12T13:02:01Z")
@nkefor please first check whether both server and client are on the same version i.e PMMv3 For the client you can use ```auto pmm-admin --version ``` If client is PMMv2 but server is PMMv3 please remove `pmm2-client`, follow [this](https://docs.percona.com/percona-monitoring-and-management/3/install-pmm/install-pmm-client/index.html) and try to register again ---
**Author:** ![nkefor](https://avatars.discourse-cdn.com/v4/letter/n/e8c25b/32.png) [@nkefor](https://forums.percona.com/u/nkefor)\ **Post date:** [February 17, 2025, 3:09am UTC](https://forums.percona.com/t/failed-to-register-pmm-agent-on-pmm-server/36650/6 "2025-02-17T03:09:50Z")
Hello, this was the issue. I was running PMM server version 3, meanwhile the pmm client version was version 2. I upgraded the PMM client to version 3 and was able to register it on the PMM Server