2 months ago
Hey,
Im trying to set up a mastra instance and connect to it from my other services. Everything works locally, but on railway it doesn't want to connect (I get no logs in the mastra instance, and get "waiting for mastra to be ready" in all my other services since they cant connect to it). I have set the internal mastra URL to:
Ive also tested with https.
The mastra logs show this:
> @graidable/mastra@1.0.0 start
> mastra start
INFO [2025-07-21 15:35:55.628 +0000] (Mastra): Mastra API running on port http://0.0.0.0:4111/api
Opening a public networking and generating a url at:
https://mastra-production-dddd.up.railway.app/api, I get this response when going to the link:
Hello to the Mastra API!
The services are all in the same project, and I've connected everything else and it works fine. Only mastra doesn't want to connect for some reason, but the public URL works fine? I don't understand why this is happening. Thanks for any help in advance.
2 Replies
2 months ago
Hey there! We've found the following might help you get unblocked faster:
If you find the answer from one of these, please let us know by solving the thread!
2 months ago
If your Mastra server binds to 0.0.0.0 (IPv4), it won't be accessible from other services over the IPv6-only private network.
You can: Update your Mastra server config to also bind to IPv6 (typically :: or ::0). Depending on your framework or server, you may need to add:server: {
port: parseInt(process.env.PORT || '4111', 10),
host: '::', // Binds to all IPv6 and IPv4 addresses if supported
}
As shared by the Railway Bot, this might help you https://docs.railway.com/reference/private-networking
Status changed to Solved chandrika • about 1 month ago