API3 Airnode HTTP Gateway

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