The pay-per-use model differs fundamentally from the other account models.

The difference here is that the billing is not based on a fixed annual price but on your real API calls per month.

Minimum term is 1 month, cancellable at until 7 days before end of month and billing take place on a monthly basis by invoice for bank transfer.

All API keys mentioned here have the same features and rate limit as a Professional Plus account.

The monthly invoice amount is calculated from the basic price plus the variable price per 1,000 API calls multiplied by your API calls.

To find out which plan best suits your needs, here is a calculation sheet for you to play with: <coming soon>

With this model, you have one API key via which all API calls are made and all your API calls are charged.

It only makes sense to choose this model if you cannot manage with the rate limit of 600 calls/60 min. of a “Professional Plus” account!

At least 1/12 of the annual price of a “Professional Plus” account is charged monthly. (The tipping point is abt. 15,000 API calls per day, from then on the invoice amount becomes larger than the minimum amount.)

With this model you have

• An Administration API key
• Unlimited number of Client API keys which are installed/connected to your clients or distributed IOT devices

Billing model here is

• The administrative API key is charged with 1/12 of the annual price of a “Professional Plus” account.
• Only the client API keys are always charged from 1st API call.

With the Pay-per-use administration API you can manage your customers yourself.

Base price + Variable price * API calls count / 1,000

• Model: Advanced
• 100 API calls / hour or ~72,000 API calls / month

0.00 + 0.025 * 72,000 / 1000 = 1.80 EUR > Less than than 1/12 Professional account, so 1/12 Professional account (10 EUR) will be charged

• Model: Advanced
• 1000 API calls / hour or ~720,000 API calls / month

0.00 + 0.025 * 720,000 / 1000 = 18.00 EUR

1/12 Professional Plus + Base price + Variable price * API calls count / 1,000

• Model: Advanced
• Any number of API calls with the administrative API key (not counted)
• 1 API calls / hour or ~720 API calls / month with client API keys (counted)

10.00 + 0.00 + 0.025 * 720 / 1000 = 10.02 EUR

• Model: Advanced
• Any number of API calls with the administrative API key (not counted)
• 1000 API calls / hour or ~720,000 API calls / month with client API keys (counted)

10.00 + 0.00 + 0.025 * 720,000 / 1000 = 28.00 EUR