# Across

**Canonical:** https://apis.io/providers/across/  
**Website:** https://across.to  
**APIs profiled:** 1

Across is a crosschain interoperability protocol powering fast, low-cost token transfers and swaps across 20+ EVM chains and Solana. Built on an intents-based design with a permissionless relayer network and UMA optimistic oracle settlement, Across fills crosschain transfers in roughly two seconds with no custodial risk. Developers integrate a single unified Swap API (plus embedded crosschain actions, gasless flows, and deposit tracking) to move native USDC, USDT, ETH, and other assets between Ethereum, Arbitrum, Base, Optimism, Polygon, Solana, and more. The protocol has facilitated over $36 billion in volume for 5M+ users. Across is a Paradigm portfolio company in the crypto-infrastructure sector.

## Kin Score — 26.4 / 100 (emerging)

Scored 2026-08-17 under rubric 0.11.0. Trend: flat (+0.0 from 26.4).

| Facet | Score |
|---|---|
| Discoverability | 75.9 |
| Contract Quality | 0.0 |
| Governance | 0.0 |
| Operational Transparency | 15.8 |
| Developer Ergonomics | 54.3 |
| Commercial Clarity | 21.1 |

Regulatory layer — **Payments**: 35.9 (matched via tags).

## Agent readiness — 19.8 (agent-aware)

| Dimension | Value |
|---|---|
| Spec Presence | no |
| Agentic Access | no |
| MCP Server | yes |
| Auth Clarity | yes |
| Idempotency | no |
| Error Semantics | no |
| OpenAPI Examples | no |
| Rate Limit Signal | no |
| Event Surface Described | no |
| Agent Skills | no |
| Well Known Catalog | no |
| Consent Identity | no |
| Agent Card | no |
| Dry Run Mode | no |

## Access

Self-serve signup — onboarding: self-serve, pricing: unknown, trial: no (confidence: medium).

## APIs (1)

- **Across Swap API** — 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...

## MCP servers (1)

- **across-mcp.yml**

## Security (4)

- **Across Authentication** — 2 schemes
- **Across Domain Security** — TLSv1.3 · HSTS · DNSSEC · DMARC
- **Across Vulnerability Disclosure** — contact published
- **Across Trust Center** — trust center published

## Tags

Company, Crypto Infrastructure, Cross Chain, Bridge, Interoperability, Blockchain, DeFi, Web3, Swap, Payments

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/providers/across/). Scores are computed from the provider's own public artifacts under a published rubric.