# API3 Airnode HTTP Gateway

**Canonical:** https://apis.io/apis/api3/airnode-http-gateway/  
**Provider:** API3 — https://apis.io/providers/api3/  
**Base URL:** https://airnode.api3.org  
**Documentation:** https://old-docs.api3.org/airnode/pre-alpha/

API3 Airnode HTTP Gateway is one of 6 APIs that [API3](https://apis.io/providers/api3/) publishes on the [APIs.io](https://apis.io/) network. Tagged areas include Airnode, HTTP Gateway, Signed Data, OEV, and REST. The published artifact set on APIs.io includes API documentation.

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.

## Machine-readable artifacts (1)

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

## Other API3 APIs (5)

- [API3 dAPI Data Feeds](https://apis.io/apis/api3/dapi-data-feeds/)
- [API3 OEV Rewards](https://apis.io/apis/api3/oev-rewards/)
- [API3 Airnodes API](https://apis.io/apis/api3/api3-airnodes-api/)
- [API3 Signed Data API](https://apis.io/apis/api3/api3-signed-data-api/)
- [API3 Status API](https://apis.io/apis/api3/api3-status-api/)

## Tags

Airnode, HTTP Gateway, Signed Data, OEV, REST

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/apis/api3/airnode-http-gateway/). The API's provider profile, Kin Score and agent-readiness rating are at https://apis.io/providers/api3/.