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Usage and limits
What a run costs in units, how the daily figure in your account menu is counted and which limits really stop a request.
#What it is for
Tools that do work on our server (DNS lookups, fetching a feed, sending a test request) cost units. Tools that run entirely in your browser cost nothing. The account menu shows how many units you used in the last 24 hours.
#Cost per run
One run of each tool costs:
| Cost per run | Tool | Where it runs |
|---|---|---|
| 5 units | XML Feed Debugger | Runs on our server |
| 3 units | Data Browser | Runs in your browser |
| 3 units | Domain Intel | Runs on our server |
| 3 units | Form Scanner | Runs on our server |
| 2 units | Blacklist Checker | Runs on our server |
| 2 units | Redirect & UTM Inspector | Runs on our server |
| 2 units | SPF Checker | Runs on our server |
| 2 units | Tracking Domain Checker | Runs on our server |
| 2 units | Webhook Endpoint Tester | Runs on our server |
| 1 unit | DNS Checker | Runs on our server |
| Free | Clipboard Cleaner | Runs in your browser |
| Free | Email Header Analyzer | Runs in your browser |
| Free | Email HTML Inspector | Runs in your browser |
| Free | Form Previewer | Runs in your browser |
| Free | Image Converter | Runs in your browser |
| Free | Regex Builder | Runs in your browser |
| Free | Request Log Viewer | Runs on our server |
| Free | Template JSON Debugger | Runs in your browser |
| Free | Workflow Builder | Browser and server |
A search across a whole feed in the XML Feed Debugger is a separate run worth 2 units.
#Daily usage and accounts
The daily figure is the sum of your allowed runs in the last 24 hours, each multiplied by its cost. Guests are counted per IP address.
| Account | Daily units shown | Request speed limit | Saved workflows |
|---|---|---|---|
| Guest (not signed in) | 100 | Half the base rate | 3 |
| Free account | 500 | Base rate | 8 |
| Verified account (confirmed email) | 2000 | Double the base rate | 20 |
The daily figure is there for orientation. What actually stops a request is the speed limit below: when you hit it, the tool answers "too many requests" (HTTP 429) and tells you when to try again.
#Speed limits
Each server tool has its own speed limit, counted per browser session per minute and per IP address per hour. These are the base rates; your account multiplies them as in the table above.
| Tool | Per minute (session) | Per hour (IP address) |
|---|---|---|
| DNS Checker | 45 | 300 |
| Tracking Domain Checker, SPF Checker | 25 | 160 |
| Blacklist Checker, Redirect & UTM Inspector, Webhook Endpoint Tester | 20 | 120 |
| Domain Intel | 15 | 80 |
| Form Scanner | 14 | 80 |
| XML Feed Debugger | 8 | 40 |
An account that is signed in but has not confirmed its email gets the guest rate until it does.
#Limits and gotchas
- Waiting is the fix for a 429: the counters are rolling windows, so the tool works again after a minute (or an hour for the IP limit).
- Several people behind one office IP share the hourly IP limit. Signing in raises the per-session limit, not the shared one.
- Browser-only tools (Email Header Analyzer, Email HTML Inspector, Clipboard Cleaner, Image Converter, Regex Builder, Form Previewer) are never limited by units.