Configuration details of SaaS

This document describes the IP configuration, hostnames, and usage limits that govern the interactions with app.humansignal.com (app.heartex.com).

Mail configuration

app.humansignal.com (app.heartex.com) sends emails from the heartex.com domain by using SendGrid, and has its own dedicated IP addresses:

  • 208.117.59.219

IP range

app.humansignal.com (app.heartex.com) utilizes the following IP addresses to handle the traffic:

  • 34.199.69.93
  • 52.22.82.31
  • 3.233.209.176

In addition, all outbound connections from our SaaS platform are issued from the following IP addresses (Import/Export, MLBackends):

  • 3.219.3.197
  • 34.237.73.3
  • 44.216.17.242

Hostname list

For setting up allow-lists in local HTTP(S) proxies, or other web-blocking software on user-end computers, add the following hostnames:

  • app.humansignal.com

Please note that our documentation and company pages, served via https://app.humansignal.com/docs/api and https://humansignal.com/ respectively, load certain page content directly from commonly used public CDN hostnames.

Usage Limits

Label Studio imposes rate limits on a per-Access Token basis. If a request exceeds the rate limit, a response with a 429 status code is returned. Clients are advised to pause and retry after a short delay in such instances.

Path Rate limit
/api/projects/*/import 1 request / 1 second
/api 10 requests / 1 second
500 requests / 1 minute

Other Operational Limits

Setting Default Limit
Maximum import file size 200 MB
Timeout for page load 90 seconds

In this article

  1. Mail configuration
  2. IP range
  3. Hostname list
  4. Usage Limits
  5. Other Operational Limits
Try Starter Cloud for free Get Started