Axle Docs

Transaction limits by plan

Each Axle plan has different capabilities and limits:

Limit	Free Trial	Pro	Pro+
Transactions	50 per trial	500/month	5,000/month
Domains	1	1	10
Custom form fields	0	10	10
API requests	Limited	Unlimited	Unlimited
Webhooks	No	Yes	Yes
Support	Community	Email	Priority email
Data retention	6 months (if inactive)	Unlimited	Unlimited

Free trial limits

Your 7-day free trial includes:

50 transactions maximum - Each payment counts as 1 transaction, regardless of amount. This is a reduced limit — Pro includes 500/month, Pro+ includes 5,000/month
Trial duration - Exactly 7 days from signup
No credit card required - Completely free to try
Pro features included - Analytics, custom domains, form fields (but with the 50 transaction cap)

Once you hit 50 transactions:

Payment buttons will stop accepting new payments
Customers will see a "Transaction limit reached" error
You can continue viewing your dashboard and data
Upgrade to a paid plan to accept more payments

Counting transactions

A "transaction" is a single payment attempt:

✅ One $10 payment = 1 transaction
✅ One $1,000 payment = 1 transaction
✅ One successful payment = 1 transaction
❌ A failed payment still counts toward the limit
❌ Test transactions on live domains count toward the limit

Extending your trial

You cannot extend the 7-day trial period. However:

You can upgrade to a paid plan anytime
The upgrade takes effect immediately
You'll get credit for the unused trial time

Pro plan limits

Pro ($15/month) includes:

500 transactions per month - Shared pool across all connected domains, resets each billing cycle
10 custom form fields - Ask customers for up to 10 additional pieces of information
Webhooks - Integrate with your own systems
API access - Build custom payment flows
Email support - Get help from our team
Analytics - Track payments and trends

No per-transaction fees — your only cost beyond the monthly subscription is Stripe's standard fee (2.9% + $0.30 per transaction).

Pro+ plan limits

Pro+ ($29/month) includes everything in Pro, plus:

5,000 transactions per month - Shared pool across all connected domains, resets each billing cycle
Advanced analytics - Detailed reporting and insights
Priority support - Faster email help from the Axle team
Higher API rate limits - More flexibility for integrations
Webhook priority - Faster webhook delivery

Custom form fields

Both Pro and Pro+ include 10 custom form fields:

These let you collect additional information from customers at checkout:

Customer name (optional)
Company name
Address
Phone number
Custom field #1-6
Up to 10 total

The Free Trial does not include custom form fields. Upgrade to Pro to collect additional customer information.

API rate limits

Pro plan

10,000 requests per hour - Sufficient for most integrations
100 requests per second - Peak rate limit

Pro+ plan

50,000 requests per hour - For high-volume integrations
500 requests per second - Peak rate limit

If you exceed these limits:

Requests return a 429 Too Many Requests error
Retry after the indicated time
Contact support if you consistently exceed limits
Enterprise rate limits available for special cases

Webhook limits

Pro

100 webhook URLs - Register up to 100 endpoints
1 retry - Failed webhooks are retried once
24-hour retention - Webhook logs kept for 24 hours

Pro+

500 webhook URLs - Register up to 500 endpoints
5 retries - Failed webhooks are retried 5 times
30-day retention - Webhook logs kept for 30 days

Storage and data

Your transaction data is stored indefinitely while your account is active:

Active account - Unlimited storage of transaction history
Paused account - Data preserved for 6 months
Deleted account - Data is permanently removed after 30 days

All data is encrypted and backed up daily.

Custom domain limits

Domain limits vary by plan:

Free Trial / Pro - 1 domain
Pro+ - Up to 10 domains
Subdomains - shop.example.com, payments.example.com, etc.
SSL included - All domains use secure HTTPS

Exceeding limits

What happens if you exceed a limit?

Limit	What happens
Transaction limit (Free Trial)	Payment buttons stop accepting payments, customers see error
API rate limit	Requests return 429 error, retry after specified time
Form fields	Can't add more fields above the plan limit
Webhooks	Can't register additional endpoints above the plan limit

How to handle exceeded limits

Free Trial transaction limit - Upgrade to Pro
API rate limit - Optimize requests or upgrade to Pro+
Form fields - Remove unused fields or upgrade plan
Webhook URLs - Delete unused endpoints or upgrade to Pro+

Monitoring your usage

You can see your current usage in your dashboard:

Transactions used - Shows during Free Trial
API usage - Available in your API section
Custom fields used - Shown when creating products
Webhook endpoints - Listed in your integration settings

During the Free Trial, monitor your transaction count. Once you hit 50, payment buttons will stop working until you upgrade.

Next steps

Learn about choosing a plan or managing your subscription.

Usage Limits