# Offchain

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

Offchain (formerly Offchain Labs) is a blockchain infrastructure company that builds and maintains core technology for the Ethereum ecosystem. It is the creator of Arbitrum, the leading Ethereum layer-2 scaling solution offering high throughput with Ethereum-grade security; Prysm, a Go implementation of the Ethereum proof-of-stake consensus client that powers roughly a quarter of the network's consensus nodes; and Stylus, which lets developers write smart contracts in Rust, C, and C++ compiled to WebAssembly. Offchain also operates ZeroDev (smart-account / ERC-4337 account-abstraction infrastructure) and the Arbitrum (Orbit) chain SDK for launching custom layer-2 and layer-3 chains. The developer surface is Ethereum-compatible JSON-RPC plus first-party TypeScript and Solidity libraries published under the @arbitrum npm scope; the company does not expose a single hosted REST API. Backed by Redpoint Ventures.

## Kin Score — 18.4 / 100 (emerging)

Scored 2026-08-20 under rubric 0.12.0. Trend: flat (+0.0 from 18.4).

| Facet | Score |
|---|---|
| Discoverability | 75.9 |
| Contract Quality | 0.0 |
| Governance | 0.0 |
| Contract Governance | 0.0 |
| Operational Transparency | 2.6 |
| Developer Ergonomics | 52.4 |
| Commercial Clarity | 0.0 |
| Access Clarity | 0.0 |

## Agent readiness — 0.0 (human-only)

| Dimension | Value |
|---|---|
| Spec Presence | no |
| Agentic Access | no |
| Reversibility Documented | no |
| MCP Server | no |
| Auth Clarity | no |
| 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

Unknown — onboarding: unknown, pricing: unknown, trial: no (confidence: low).

## APIs (1)

- **Arbitrum One JSON-RPC** — Public Ethereum-compatible JSON-RPC endpoint for Arbitrum One (chain id 42161 / 0xa4b1), the flagship Arbitrum layer-2 network. Supports the standard Ethereum JSON-RPC method se...

## Security (1)

- **Offchain Domain Security** — TLSv1.3 · HSTS · DNSSEC · DMARC

## Tags

Company, Crypto, Blockchain, Ethereum, Layer 2, Scaling, Infrastructure, Web3, JSON-RPC, SDK

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