# Developer
This section helps developers build applications that use drand as a source of randomness. For help running your own drand network, see the Operator's Guide.
The current public League of Entropy drand mainnet API endpoints are:
https://api.drand.sh(HTTPS endpoint, also available over HTTP)https://api2.drand.sh(HTTPS endpoint, also available over HTTP)https://api3.drand.sh(HTTPS endpoint, also available over HTTP)https://drand.cloudflare.com(HTTPS endpoint)https://api.drand.secureweb3.com:6875(HTTPS endpoint)/dnsaddr/api.drand.sh(1st-level libp2p gossipsub relay endpoint)/dnsaddr/api2.drand.sh(1st-level libp2p gossipsub relay endpoint)/dnsaddr/api3.drand.sh(1st-level libp2p gossipsub relay endpoint)
There are two networks on mainnet:
defaultwhich is running the chained scheme with public keys on G1fastnetwhich is running the unchained scheme with public keys on G2
default network chain hash:
8990e7a9aaed2ffed73dbd7092123d6f289930540d7651336225dc172e51b2ce
fastnet network chain hash:
dbd506d6ef76e5f386f41c651dcb808c5bcbd75471cc4eafa3f4df7ad4e4c493
In order to retrieve randomness from a drand network you should preferentially use the drand client libraries or the drand-client CLI, which support the different mechanisms and perform verification for every value obtained.
Alternatively, you can interact directly with the endpoints. Make sure to manually verify every value:
- HTTP API reference
- Pubsub-based randomness distribution
- gRPC API: usually not publicly accessible. A gRPC API is supported by the drand client libraries, the
drand-clientCLI application and the drand application itself (usingdrand get public).