aid: api3 url: https://raw.githubusercontent.com/api-evangelist/api3/refs/heads/main/apis.yml name: API3 kind: company description: >- API3 is a first-party blockchain oracle network that connects real-world APIs directly to smart contracts without intermediary nodes. Its core technology is Airnode, a serverless oracle node that API providers operate themselves, cryptographically signing data before serving it on-chain. The API3 Market enables dApp developers to subscribe to managed decentralized APIs (dAPIs) — aggregated, multi-source data feeds covering 150+ price pairs across 40+ EVM chains — without speaking to a sales rep or signing a contract. API3's OEV (Oracle Extractable Value) mechanism captures MEV that traditionally leaks to bots around oracle updates and redistributes 80% of that revenue to the dApps reading the feeds, creating a net-positive oracle revenue model. The DAO governs the network via staked API3 tokens. image: https://kinlane-productions.s3.amazonaws.com/apis-json/apis-json-logo.jpg tags: - Blockchain - Oracle - Decentralized - Data Feeds - Price Feeds - Web3 - DeFi - Smart Contracts - OEV - dAPI type: Index access: 3rd-Party position: Consumer created: '2026-06-13' modified: '2026-06-13' specificationVersion: '0.19' apis: - aid: api3:dapi-data-feeds name: API3 dAPI Data Feeds description: >- Managed decentralized API (dAPI) data feeds sourced directly from first-party oracle nodes operated by the data providers themselves. Each feed aggregates signed data from multiple Airnode operators and is updated on-chain based on deviation thresholds (0.25%, 0.5%, 1%, 2.5%, or 5%) and a 24-hour heartbeat. Smart contracts read feeds via the IProxy/AggregatorV2V3Interface-compatible Api3ReaderProxyV1 contract. Over 150 asset pairs — crypto, forex, equities, and commodities — are available across 40+ EVM networks. Subscriptions are purchased through the API3 Market; testnet plans are 7-day trials and mainnet plans are 3-month subscriptions. humanURL: https://market.api3.org/ baseURL: https://market.api3.org tags: - Data Feeds - Price Feeds - dAPI - Oracle - DeFi - EVM properties: - type: Documentation url: https://docs.api3.org/dapps/ - type: Integration url: https://docs.api3.org/dapps/integration/ - type: GettingStarted url: https://docs.api3.org/dapps/ x-features: - 150+ price pairs (crypto, forex, equities, commodities) - Configurable deviation thresholds (0.25% – 5%) - 24-hour heartbeat interval - AggregatorV2V3Interface-compatible proxy contracts - 40+ EVM chains including Ethereum, Arbitrum, Base, BNB Chain, Polygon, Avalanche - No minimum commitment; pay-as-you-go subscription x-use-cases: - DeFi lending protocols needing reliable collateral price feeds - Derivatives and perpetuals platforms requiring low-latency mark prices - Stablecoin systems referencing external price anchors - Prediction markets and options protocols reading settlement prices - aid: api3:oev-rewards name: API3 OEV Rewards description: >- Oracle Extractable Value (OEV) Rewards is API3's revenue-sharing mechanism for dApps that integrate OEV-enabled Api3ReaderProxyV1 proxy contracts. When liquidation or arbitrage opportunities arise around oracle updates, API3 runs an auction on the OEV Network and captures the resulting MEV. 80% of auction proceeds are paid monthly in the native gas token of the dApp's deployed chain to the wallet the dApp designates. Integration requires deploying a custom proxy (free via the API3 Market) rather than the generic shared proxy, and registering a recipient wallet address with an API3 representative. humanURL: https://docs.api3.org/dapps/oev-rewards/ baseURL: https://market.api3.org tags: - OEV - MEV - Revenue Sharing - DeFi - Oracle properties: - type: Documentation url: https://docs.api3.org/dapps/oev-rewards/ - type: GettingStarted url: https://docs.api3.org/dapps/oev-rewards/ x-features: - 80% of OEV auction proceeds returned to dApp - Monthly payouts in native chain gas token - No code changes to smart contracts required - Custom proxy deployment via API3 Market - Supported on all 40+ API3 chain deployments x-use-cases: - Lending protocols (Compound, Morpho, Moonwell) offsetting oracle costs - Any DeFi application using API3 dAPI feeds to generate passive revenue - Treasury diversification via oracle MEV redistribution - aid: api3:airnode-http-gateway name: API3 Airnode HTTP Gateway description: >- The Airnode HTTP gateway exposes a REST endpoint that allows authorized callers to query an Airnode operator's API data off-chain without sending a blockchain transaction. API providers configure the gateway in their Airnode's nodeSettings, protecting it with an API key. Responses contain the same cryptographically signed data that is eventually posted on-chain, enabling off-chain verification, testing, and direct signed-data consumption by third-party data push relayers. The OEV Gateway variant is used by auction searchers to retrieve Airnode-signed price updates that can only be used by the winning OEV auction bidder. humanURL: https://old-docs.api3.org/airnode/pre-alpha/ baseURL: https://airnode.api3.org tags: - Airnode - HTTP Gateway - Signed Data - OEV - REST properties: - type: Documentation url: https://old-docs.api3.org/airnode/pre-alpha/ x-features: - API-key-protected REST endpoint per Airnode deployment - Returns cryptographically signed data from the source API provider - Enables off-chain data consumption without on-chain transactions - OEV Gateway variant restricts signed data to winning auction bidder x-use-cases: - Off-chain testing of Airnode data before on-chain integration - Third-party push relayers submitting signed data to chain - OEV searchers fetching price updates to submit winning auction bids common: - type: Website url: https://api3.org/ - type: Documentation url: https://docs.api3.org/ - type: Blog url: https://blog.api3.org/ - type: GitHubOrganization url: https://github.com/api3dao - type: Discord url: https://discord.gg/qnRrcfnm5W - type: Twitter url: https://twitter.com/API3DAO - type: Telegram url: https://t.me/API3DAO - type: Forum url: https://forum.api3.org/ - type: Staking url: https://stake.api3.org/ - type: Market url: https://market.api3.org/ - type: OpenAPI url: openapi/api3-signed-api-openapi.yml - type: JSONLd url: json-ld/api3-context.jsonld - type: Plans url: plans/api3-plans.yml - type: RateLimits url: rate-limits/api3-rate-limits.yml - type: FinOps url: finops/api3-finops.yml maintainers: - FN: Kin Lane email: kin@apievangelist.com