Across primary-source snapshot
Fetched: 2026-04-25 UTC
1) Official site
Source: https://across.to/
Selected excerpts from the official site:
Interoperability Powered By Intents
Across is the only crosschain intents protocol in production today, enabling the fastest and lowest-cost interoperability solution without security tradeoffs.
Additional signals from the page:
- The homepage frames Across as an interoperability protocol rather than only a bridge frontend
- Official copy emphasizes the intents model, competitive relayers, and a modular architecture with RFQ, relayers, and settlement layers
- The production metrics and end-user claims are paired with developer/integrator positioning rather than pure consumer marketing
2) Docs introduction
Source: https://docs.across.to/introduction
Selected excerpts from the docs:
Across is a crosschain interoperability protocol that provides the fastest, cheapest, and most secure way to move assets across blockchains.
With ~2 second fills on mainnet and support for 23+ chains, Across powers crosschain swaps, bridges, and embedded actions through a single unified API.
Unlike single-mechanism bridges, Across intelligently routes through three distinct settlement pathways to optimize for speed, cost, and transfer size.
Additional signals from the docs:
- The docs make clear that the real product surface is a unified API plus executable calldata / tracking flows, not just a website bridge
- Embedded actions are a meaningful signal that Across is aiming at application-level interop workflows, not only token movement
3) llms.txt documentation index
Source: https://docs.across.to/llms.txt
Selected excerpts/signals from the docs index:
Across Protocol is a crosschain interoperability protocol powering fast, low-cost token transfers across 23+ chains.
Three settlement mechanisms: Intents (relayer network), CCTP (USDC), and OFT (USDT).
API base URL: https://app.across.to/api
Additional signals from the docs index:
- The index exposes a rich production surface: fees, actors, technical FAQ, refunds, deposit tracking, stablecoin-specific pages, embedded actions, relayer operation, and security verification
- This is especially useful for cataloging because it reveals how much operational complexity Across exposes publicly to integrators
4) Security model and verification docs
Source: https://docs.across.to/introduction/security
Selected excerpts from the docs:
Across uses optimistic verification to secure crosschain transfers.
The security model rests on two foundations: Across smart contracts … and UMIP-157 and UMIP-179
The system only requires a single honest actor to dispute invalid proposals to remain secure.
Additional signals from the docs:
- Across differentiates itself from validator-set bridge designs by emphasizing challengeable bundle proposals, posted bonds, and UMA dispute resolution
- The ABT bond mechanism and root-bundle validation workflow make the trust model much clearer than the homepage alone
- The explicit security docs are high-signal primary materials for understanding the real operating assumptions of the protocol
5) GitHub organization
Source: https://github.com/across-protocol
Selected excerpts/signals from the public org page:
Smart contracts for Across protocol
Across Protocol Bots & Infrastructure
mcp-server-across
Additional signals from the repos:
- Public repositories show Across shipping contracts, relay infrastructure, SDK/shared logic, constants packages, and newer adjacent infra repos
- The MCP server repo is a useful signal that Across is exposing agent/developer integration surfaces beyond a conventional bridge UI
Notes
- This pass did not locate a classic whitepaper or litepaper from official Across sources.
- The docs portal and security materials were stronger primary sources than the homepage alone.
- Across appears best categorized as cross-chain intents / bridge / interoperability API infrastructure.