# zkSync

**Canonical:** https://apis.io/providers/zksync/  
**Website:** https://zksync.io  
**APIs profiled:** 10

zkSync is a family of Ethereum Layer 2 scaling networks from Matter Labs built on zero-knowledge proofs. zkSync Era is the production zkEVM rollup; the ZK Stack is the open-source framework used to deploy ZK Chains that interoperate in the Elastic Network. Developers integrate via standard JSON-RPC (with zkSync-specific extensions for paymasters, account abstraction, and L1<->L2 messaging), the zksync-ethers / zksync2-* SDKs, hardhat-zksync and foundry-zksync toolchains, the canonical Bridge, and Blockscout-based block explorers.

## Kin Score — 34.4 / 100 (thin)

Scored 2026-08-20 under rubric 0.12.0. Trend: flat (+0.0 from 34.4).

| Facet | Score |
|---|---|
| Discoverability | 74.1 |
| Contract Quality | 45.6 |
| Governance | 13.6 |
| Contract Governance | 13.6 |
| Operational Transparency | 26.3 |
| Developer Ergonomics | 23.8 |
| Commercial Clarity | 28.9 |
| Access Clarity | 28.9 |

## Agent readiness — 19.7 (agent-aware)

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

## Access

Free — onboarding: unknown, pricing: free, trial: no (confidence: medium).

## APIs (10)

- **zkSync Era Mainnet JSON-RPC** — JSON-RPC endpoint for zkSync Era mainnet (chain ID 324). Implements standard eth_* methods plus zks_* extensions for L1 batch info, fee estimation, bridge contracts, paymaster p...
- **zkSync Era Sepolia JSON-RPC** — JSON-RPC endpoint for the zkSync Era Sepolia testnet (chain ID 300) used for development, contract deployment, and integration testing.
- **zkSync Era WebSocket** — WebSocket variant of the zkSync Era JSON-RPC endpoint for real-time eth_* subscriptions (newHeads, logs, pendingTransactions) and zks_* subscriptions.
- **zksync-ethers SDK** — TypeScript SDK built on top of ethers.js that adds zkSync-specific providers, signers, paymaster helpers, account-abstraction utilities, deposit and withdrawal flows, and contra...
- **zksync2-go SDK** — Official Go SDK for zkSync Era with support for transactions, EIP-712 typed data, paymasters, deposits, and withdrawals.
- **hardhat-zksync** — Suite of Hardhat plugins for zkSync development — compile, deploy, verify, run local nodes, upgrade contracts, and integrate with the zkVM toolchain.
- **foundry-zksync** — Fork of Foundry (forge / cast / anvil) with first-class zkSync support for compiling, testing, scripting, and deploying contracts to zkSync Era and ZK-Stack chains.
- **zkSync Era Bridge** — Canonical cross-chain bridge between Ethereum L1 and zkSync Era for ETH and ERC-20 tokens. The Portal also exposes bridging across ZK Chains in the Elastic Network.
- **ZK Stack** — Open-source framework (zksync-era + era-contracts) for deploying customizable ZK Chains that share liquidity and security through the Elastic Network shared bridge.
- **zkSync Era Block Explorer API** — Official Blockscout-based block explorer for zkSync Era with REST API exposing blocks, batches, transactions, addresses, contracts, and token data.

## Security (1)

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

## Plans (1)

- **Zksync Plans Pricing**

## Tags

Layer 2, Ethereum, zkEVM, ZK-Rollup, Account Abstraction, Paymaster, ZK Stack, Bridge

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