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API3 Data Feeds

API3 Data Feeds

API3

Best for Self-serve price feeds for EVM contracts, with OEV rewards

Chains
Ethereum Base Arbitrum Polygon BNB Chain Avalanche
Price
Per-feed plans: gas cost or $0.05/day, whichever is higher; gas grants available
License
MIT (contracts)

Price feeds from first-party data providers that you buy per feed and per chain on API3 Market, with no sales call or contract. Plans last 3 months on mainnet and 7 days on testnet, priced at the expected update gas cost or $0.05 a day, whichever is higher; tighter deviation thresholds cost more. Contracts read feeds through a Chainlink-style AggregatorV2V3Interface, and API3 pays partner dApps 80% of the oracle extractable value (OEV) it captures.

Catch EVM chains only; plan prices show only in the Market, and plans expire unless renewed

Visit API3 Data Feeds Checked Oct 18, 2026 against the maker's page for API3 Data Feeds (price and verdict source)

Chain support, with sources

We only add a chain when the maker's own docs name it. "EVM-compatible" alone counts for no specific chain. A testnet-only record means the page we checked only shows testnet; it isn't a finding that mainnet is unsupported. This is what the docs say, not a test or security review.

Common questions about API3 Data Feeds

Which blockchains does API3 Data Feeds support?
The maker's docs name mainnet support for Ethereum, Base, Arbitrum, Polygon, BNB Chain, Avalanche. Every chain links to the maker's own page above.
How much does API3 Data Feeds cost?
Per-feed plans: gas cost or $0.05/day, whichever is higher; gas grants available.

Docs: docs.api3.org/dapps

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