Drand provides a JSON HTTP interface that clients can use to fetch randomness from each drand network running on nodes. If you're using drand in an application, it may be easier and more secure to use one of the client libraries, which will also perform verification of randomness rounds and add additional features like failover, racing, aggregation, and caching.
All that's required is the address of the HTTP interface and way to fetch from HTTP, e.g. curl.
The public League of Entropy HTTP APIs are available at:
https://api.drand.sh/https://api2.drand.sh/https://api3.drand.sh/https://drand.cloudflare.com/https://api.drand.secureweb3.com:6875/The League of Entropy currently runs two networks in mainnet: default and fastnet. They are chained and unchained networks respectively, the details of which can be found in the cryptography specification.
The chain hash for the League of Entropy default chain running at a 30s frequency in chained mode on Mainnet is:
8990e7a9aaed2ffed73dbd7092123d6f289930540d7651336225dc172e51b2ce
It also available at the default context, i.e. omitting the /{chain-hash} in the API specification below.
The chain hash for the League of Entropy quicknet network running at a 3s frequency in unchained mode on Mainnet is:
52db9ba70e0cc0f6eaf7803dd07447a1f5477735fd3f661792ba94600c84e971
Note that **the fastnet network has been deprecated.**
Furthermore, we have "testnet endpoints" which are a completely separate environment for testing our latest changes, potentially helping you detect breaking changes or issues with our latest release before they hit mainnet. We recommend running your CI/CD against our testnet endpoints as well as our mainnet ones, in order to detect issues early.
We currently have three testnet HTTP(S) endpoints being run by:
As you can see, they are currently running various chains as explained below. We are committed to maintaining the default, G2 based, chained testnet chain (84b2234fb34e835dccd048255d7ad3194b81af7d978c3bf157e3469592ae4e02) as well as the faster, G1 based, unchained quicknet-t testnet chain (cc9c398442737cbd141526600919edd69f1d6f9b4adb67e4d912fbc64341a9a5) as long as we run the equivalent mainnet networks.