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 humansignal.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:
34.199.69.9352.22.82.313.233.209.176
In addition, all outbound connections from our SaaS platform are issued from the following IP addresses (Import/Export, ML backends, Prompts):
3.219.3.19734.237.73.344.216.17.242
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 second500 requests / 1 minute |
Other Operational Limits
| Setting | Default Limit |
|---|---|
| Maximum import file size | 200 MB |
| Timeout for page load | 90 seconds |