Blockchain API providers calculate usage in distinct ways:
- Chainstack: Employs a 1:1 Request Unit (RU) model, ensuring costs align directly with usage, free of multipliers.
- QuickNode: Uses API Credits, with multipliers from 20x to 120x depending on the method.
- Alchemy: Relies on Compute Units (CUs), with multipliers between 10x and 60x.
- Helius: Applies its own request model, with multipliers ranging from 1x to 10x.
A single request costing 1 RU on Chainstack could translate to 20–120 API Credits on QuickNode, 10–60 CUs on Alchemy, or 1–10 units on Helius, amplifying expenses significantly for demanding applications.