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Static IP guide

Making API requests with a static IP from a Python app on Koyeb

On Koyeb, a Python service adopts Fixie through one secret and one requests option: store the proxy URL as FIXIE_URL, expose it with --env "FIXIE_URL=@FIXIE_URL", and pass the proxies dict on allowlisted calls. Koyeb's own IPs can change with scaling; Fixie's do not.

RuntimePython
PlatformKoyeb
DestinationAPI allowlisting
Fixie productFixie HTTP/S proxy

Recommended setup

Use Fixie HTTP/S proxy for HTTP and HTTPS requests to an API, webhook provider, or service that allowlists outbound IP addresses. Store the proxy value in FIXIE_URL, then configure Python to route outbound traffic through Fixie before connecting to API allowlisting.

Set up Fixie on Koyeb

Create a Fixie HTTP/S proxy in the Fixie dashboard. Copy the proxy value into Koyeb secrets as FIXIE_URL, and copy the outbound IPs into the destination allowlist.

Set a Koyeb secret

koyeb secret create FIXIE_URL --value "..."
koyeb app init YOUR_APP_NAME --env "FIXIE_URL=@FIXIE_URL"

Implementation

The example below shows the core application-side change. Keep credentials in environment variables and avoid committing proxy, database, or API secrets.

Make an HTTP request through FIXIE_URL

import os
import requests

proxies = {
    "http": os.environ["FIXIE_URL"],
    "https": os.environ["FIXIE_URL"],
}

response = requests.get("https://api.example.com/data", proxies=proxies)
print(response.status_code)

Good to know

  • Fixie maintains a Koyeb example app on GitHub if you want a working reference deployment to compare against.
  • For SDKs whose HTTP layer you cannot configure, exporting http_proxy and https_proxy in the service environment proxies them transparently.

Allowlist and test the static IPs

  1. Open the Fixie dashboard and copy the outbound IP addresses for this proxy.
  2. Add both IPs to the API provider.
  3. Deploy the updated Python app on Koyeb.
  4. Run a small connection test before sending production traffic.

Related guides

Related docs

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