API3

API3 Airnode HTTP Gateway

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.

GitHub

Documentation

📖
Documentation
https://old-docs.api3.org/airnode/pre-alpha/

Work with this as data

Every API here is available over the APIs.io API and to AI agents over MCP.

MCP server

One button, every client — Claude, Cursor, VS Code and the rest.

https://apis.io/mcp

Tools for apis

7 MCP tools reach this
  • find_apisBrowse and filter every API in the catalog.
  • get_api_artifactsOne API's artifacts, grouped by type.
  • get_openapiThe primary OpenAPI for this API.
  • find_similar_apisAPIs that look like this one.
  • apis_io_searchSTART HERE — APIs, providers and tags for one query, each with its total.
  • resolveTurn a domain, URL or GitHub org into the provider it belongs to.
  • find_cohortsEvery scored population of providers in the catalog.
All 92 tools →

Call it yourself

curl for this page
This API 
curl "https://apis.io/api/v1/apis/airnode-http-gateway"
All apis 
curl "https://apis.io/api/v1/apis?limit=25"

Discovery needs no key. Ratings and market analysis are Pro.

Get an API key

Free tier, no form to fill in. Signing in shares your email address with us — we store it to create your key and to recognise you if you sign in with another provider. See our Privacy Policy and Terms.

GitHub Google LinkedIn

A second provider on the same verified email joins the account you already have.

API entry from apis.yml

apis.yml Raw ↑ 
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