# Across Swap API

**Canonical:** https://apis.io/apis/across/across-swap-api/  
**Provider:** Across — https://apis.io/providers/across/  
**Base URL:** https://app.across.to/api  
**Documentation:** https://docs.across.to/introduction/swap-api

Across Swap API is published by [Across](https://apis.io/providers/across/) on the [APIs.io](https://apis.io/) network. Tagged areas include Cross-Chain, Bridge, Swap, and Payments. The published artifact set on APIs.io includes API documentation, an API reference, a getting-started guide, and authentication docs.

The unified REST entry point for all crosschain operations on Across — request swap/bridge quotes and approval data, execute embedded crosschain actions on the destination chain, run gasless flows, enumerate supported chains/tokens/sources, and track deposit lifecycle status. Authentication is a Bearer API key plus a 2-byte hex integratorId query parameter; testnet requires no credentials.

## Machine-readable artifacts (6)

- **Documentation** — https://docs.across.to
- **APIReference** — https://docs.across.to/api-reference
- **GettingStarted** — https://docs.across.to/introduction
- **Authentication** — https://raw.githubusercontent.com/api-evangelist/across/refs/heads/main/authentication/across-authentication.yml
- **Conventions** — https://raw.githubusercontent.com/api-evangelist/across/refs/heads/main/conventions/across-conventions.yml
- **APIsJSON** — https://raw.githubusercontent.com/api-evangelist/across/refs/heads/main/apis.yml

## Tags

Cross-Chain, Bridge, Swap, Payments

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