Band Protocol
Cross-chain oracle running on its own BandChain since 2018, with price feeds and VRF.
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Band Protocol key facts
| Category | Blockchain oracle |
|---|---|
| Chains | 40+ chains |
| Platforms | Web, API |
| Token | BAND |
| Chains | 40+ chains |
| Launched | Securing data onchain since 2018, per its homepage; BandChain GuanYu mainnet launched October 2020 |
| Open source | Yes, GPL 3.0 on GitHub (bandprotocol/chain) |
| Fees | Offchain price data free; onchain requests pay BandChain gas (500k to 5M gas per MsgRequestData) |
What is Band Protocol?
Band Protocol is an oracle network that runs on its own chain, BandChain. Its homepage says it has secured data onchain since 2018, and its GuanYu mainnet launched in October 2020. It offers price feeds and verifiable randomness (VRF). Its homepage lists 40+ chains, 52+ validators, 82+ clients and partners, and $188M in total value secured. BAND is its token.
How Band Protocol works
BandChain is a Cosmos SDK blockchain that uses Tendermint BFT consensus, so blocks are final once enough validators confirm them.
Anyone can register a data source with MsgCreateDataSource, setting the owner, the per-query fee and the executable that validators run to fetch data. Oracle scripts written in WebAssembly combine sources and aggregate results on BandChain, and results reach other chains through IBC or one-way bridges. Band's GuanYu mainnet launched in October 2020.
With its V3 upgrade, BandChain focuses only on price data, with sub-second updates across hundreds of symbols. Consumers choose an update interval and can add a price deviation trigger. Delivery uses IBC, third-party cross-chain messaging or Band's native threshold-signature verification. On EVM chains, contracts read prices through StdReferenceProxy (v2) or PacketConsumerProxy (v3) contracts, and Band tells developers to use only the proxy, since it always points to the current base contract.
How to start with Band Protocol
- Band recommends that developers test on a testnet before mainnet.
- Its supported-blockchains page lists proxy addresses for testnets such as Monad, Sonic and Celo Sepolia, and for mainnets including Astar, Celo, Cronos, Flow and Harmony.
- Tooling includes bandchain.js, pyband for Python and cw-band for CosmWasm contracts.
- BAND holders who do not run a validator can delegate to one through the staking guide and share its rewards, minus the validator's commission.
Band Protocol fees and limits
Offchain users can read BandChain price data free of charge. Onchain, every transaction pays gas times gas price, and each validator sets its own minimum gas price. Band's estimates are about 70k gas for MsgSend, 120k for MsgDelegate, and 500k up to 5 million for MsgRequestData, depending on the data script and how many validators must query. Staking rewards accrue about every 3 seconds, but claiming them is manual and costs a transaction fee.
Risks to know before using Band Protocol
- BAND inflation runs between 7% and 20% a year and adjusts to target 66% of supply staked, so holders who do not stake are diluted over time.
- Delegators share validator risk: if a validator misbehaves, part of its stake and its delegators' stake is slashed.
- Undelegated BAND stays non-transferable for a 21-day unstaking period.
- The chain code in the bandprotocol/chain GitHub repository is licensed under GPL 3.0.
Band Protocol alternatives
Other projects people compare with Band Protocol.
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Where Band Protocol ranks on DappAtlas
Band Protocol pros and cons
- Own chain secured by 52+ validators
- Price feeds plus VRF randomness
- Live since 2018
- $188M total value secured, small next to Chainlink or RedStone
- 11+ data sources listed on its homepage
Band Protocol FAQ
What is Band Protocol?
Band Protocol is an oracle network that runs on its own chain, BandChain. Its homepage says it has secured data onchain since 2018, and its GuanYu mainnet launched in October 2020. It offers price feeds and verifiable randomness (VRF). Its homepage lists 40+ chains, 52+ validators, 82+ clients and partners, and $188M in total value secured. BAND is its token.
Which chains does Band Protocol support?
40+ chains.
How much does Band Protocol cost?
Offchain price data free; onchain requests pay BandChain gas (500k to 5M gas per MsgRequestData), according to Band Protocol’s own page (checked Sep 26, 2026).
Sources
How this page works
Sources: Band Protocol: official site, Band Protocol: Home, Band Docs: High-level overview. Data as of Sep 26, 2026.
Not affiliated with any project listed. Educational content, not financial advice.