> For the complete documentation index, see [llms.txt](https://azen.gitbook.io/whitepaper/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://azen.gitbook.io/whitepaper/poc-tokenomics/proof-of-contribution-poc/service-delivery-poc.md).

# Service Delivery PoC

Service Delivery PoC is based on two payment models: 

* aZen token burning
* stablecoin payments

aZen Token Burning Definition: When clients burn aZen tokens to access services, node operators earn PoC based on the burned tokens. 

Formula 

PSD=BurnedaZenTokens×CSDPS​D=BurnedaZenTokens×CS​D

Where: 

Burned aZen Tokens = Amount burned by clients. 

CSDCS​D = Supply-demand-based coefficient.

Stablecoin Payment Definition: If services are paid in stablecoins, a platform fee is converted into aZen tokens and burned to determine the PoC. 

Formula 

PSD=Platform Fee×CSDPS​D=Platform Fee×CS​D

Where: 

Platform Fee = Portion of stablecoin payment converted to aZen tokens and burned (e.g., 5%). 

C\_SD = Supply-demand-based coefficient.

\ <br>