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Making HTTP requests

Advanced
Concept

Overview​

Cube smart contracts can make a request to a URL using HTTPS outcalls. HTTPS outcalls can be used to directly obtain off-chain data or interact with off-chain systems, such as Web 2.0 services or enterprise IT infrastructure.

HTTPS outcalls enable a wide range of applications. For example, oracle services can directly integrate with BIG in a trustless manner, and dapps can provide user notifications or anything else that requires communication with servers on the Internet.

How it works​

For detailed information on how it works, please refer to the HTTPS outcalls - How it works.

How to make a request​

For detailed information on how to utilize this feature, please refer to the HTTPS outcalls - How to use page.

The documentation includes examples demonstrating how to make the following types of requests:

Examples​

Refer to the following examples of HTTP outcalls implementations in canister smart contracts:

  • Fetch price information for DeFi protocols using the Exchange Rate Cube.
  • Communicate with other chains using the EVM RPC Cube.
  • Fetch information about Bitcoin Ordinals and Bitcoin Meta-Protocols using the Ordinals Cube.