generated: '2026-07-19'
method: searched
source: https://docs.harmonic.gg/run-a-validator/endpoints
docs: https://docs.harmonic.gg/run-a-validator/endpoints
summary: >-
  Harmonic runs a public Solana testnet cluster alongside mainnet. Validators and
  searchers can point the same clients/protos at the testnet Block Engine, Remote
  TPU, and Shred Receiver to exercise the full flow before mainnet. Access to both
  mainnet and testnet still requires the identity/pubkey to be whitelisted by the
  Harmonic team.
environments:
- name: mainnet
  cluster: solana-mainnet-beta
  regions: [Amsterdam, Newark, Frankfurt, London, Tokyo, Singapore, Salt Lake City]
- name: testnet
  cluster: solana-testnet
  region: Salt Lake City
  endpoints:
    block_engine: https://testnet.be.harmonic.gg
    remote_tpu: https://testnet.tpu.harmonic.gg
    shred_receiver: 64.130.53.76:8001
notes:
- Test values (validator identities, searcher pubkeys) are supplied by the operator's own Solana keypairs; Harmonic does not publish shared magic test credentials.
- Whitelisting is required for both testnet and mainnet access.