API3

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: [email protected]