Cloudflare 403 blocks when accessing third-party APIs

1

Hi,

My app on Fly.io (builder-signing-server) is being blocked by Cloudflare
when trying to access polymarket.com APIs. The target site is blocking
datacenter IPs.

Questions:

  1. Do you have IP ranges I can share with the target API provider for whitelisting?
  2. Is there an option for dedicated/less-flagged IP addresses?
  3. Are there specific regions less likely to be blocked?

Machine IDs: 080545ef5747e8, 1859591c276158
Region: iad (Ashburn)

2

Hi… Whitelisting would require static egress IPs:

https://fly.io/docs/networking/egress-ips/

Also, there’s a more convenient variant of this in beta, which removes many of the shortcomings of the per-Machine addresses mentioned in that doc…

https://community.fly.io/t/beta-feature-try-out-app-scoped-egress-ips/26536

Hope this helps!

3

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