Protocol Addresses and URLs

Mainnet URLs

Network Address (RPC)	https://mainnet.helius-rpc.com?api-key=<api_key>
Photon RPC API	https://mainnet.helius-rpc.com?api-key=<api_key>

Devnet URLs

Network Address (RPC)	https://devnet.helius-rpc.com?api-key=<api_key>
Photon RPC API	https://devnet.helius-rpc.com?api-key=<api_key>

zkTestnet URLs (deprecated)

Note: zkTestnet has been deprecated in favor of our Solana Devnet deployment. Please use the public Solana Devnet Cluster for further development.

Network address (RPC)	https://zk-testnet.helius.dev:8899 (deprecated)
Photon RPC API	https://zk-testnet.helius.dev:8784 (deprecated)
Prover	https://zk-testnet.helius.dev:3001 (deprecated)

Program IDs and Accounts (from 27th Aug 2024 onward)

Light System Program	SySTEM1eSU2p4BGQfQpimFEWWSC1XDFeun3Nqzz3rT7
Compressed Token Program	cTokenmWW8bLPjZEBAUgYy3zKxQZW6VKi7bqNFEVv3m
Account Compression Program	compr6CUsB5m2jS4Y3831ztGSTnDpnKJTKS95d64XVq
Shared Public State Tree	smt1NamzXdq4AMqS2fS2F1i5KTYPZRhoHgWx38d8WsT
Shared Public Nullifier Queue	nfq1NvQDJ2GEgnS8zt9prAe8rjjpAW1zFkrvZoBR148
Shared Public Address Tree	amt1Ayt45jfbdw5YSo7iz6WZxUmnZsQTYXy82hVwyC2
Shared Public Address Queue	aq1S9z4reTSQAdgWHGD2zDaS39sjGrAxbR31vxJ2F4F

Program IDs and Accounts (deprecated as of 27th Aug 2024)

Light System Program	H5sFv8VwWmjxHYS2GB4fTDsK7uTtnRT4WiixtHrET3bN
Compressed Token Program	HXVfQ44ATEi9WBKLSCCwM54KokdkzqXci9xCQ7ST9SYN
Account Compression Program	CbjvJc1SNx1aav8tU49dJGHu8EUdzQJSMtkjDmV8miqK
Shared Public State Tree	5bdFnXU47QjzGpzHfXnxcEi5WXyxzEAZzd1vrE39bf1W
Shared Public Nullifier Queue	44J4oDXpjPAbzHCSc24q7NEiPekss4sAbLd8ka4gd9CZ
Shared Public Address Tree	C83cpRN6oaafjNgMQJvaYgAz592EP5wunKvbokeTKPLn
Shared Public Address Queue	HNjtNrjt6irUPYEgxhx2Vcs42koK9fxzm3aFLHVaaRWz

Lookup Tables

Lookup tables can be used with compressed accounts to reduce your transaction size. We provide a pre-initialized lookup table on Mainnet and Devnet that covers the Light's program IDs and accounts:

Lookup Table #1 (Mainnet)	9NYFyEqPkyXUhkerbGHXUXkvb4qpzeEdHuGpgbgpH1NJ
Lookup Table #1 (Devnet)	qAJZMgnQJ8G6vA3WRcjD9Jan1wtKkaCFWLWskxJrR5V

You can also create your own lookup tables. We provide a helper function that initializes your table with Light's default program IDs and accounts. We also have the following guide on creating lookup tables in the TypeScript Client section.