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-images.s3.amazonaws.com/shared/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: Integrations
    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: Forums
  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