# Starknet

**Canonical:** https://apis.io/providers/starknet/  
**Website:** https://www.starknet.io  
**APIs profiled:** 13

Starknet is a permissionless Ethereum Layer 2 validity rollup developed by StarkWare, powered by STARK proofs and the Cairo smart contract language. Developers interact with Starknet via a versioned Starknet JSON-RPC (served by Pathfinder, Juno, and Papyrus full nodes as well as Infura / Alchemy / Blast / Nethermind providers), the Cairo toolchain (Scarb, Starknet Foundry, Cairo compiler, cairo-vm), client SDKs (starknet.js, starknet.py, starknet-rs), the StarkGate canonical bridge between Ethereum and Starknet, and Voyager / Starkscan block explorers.

## Kin Score — 33.9 / 100 (thin)

Scored 2026-08-20 under rubric 0.12.0. Trend: flat (+0.0 from 33.9).

| Facet | Score |
|---|---|
| Discoverability | 74.1 |
| Contract Quality | 54.9 |
| Governance | 11.4 |
| Contract Governance | 11.4 |
| Operational Transparency | 21.1 |
| Developer Ergonomics | 14.3 |
| Commercial Clarity | 28.9 |
| Access Clarity | 28.9 |

## Agent readiness — 27.8 (agent-aware)

| Dimension | Value |
|---|---|
| Spec Presence | yes |
| Agentic Access | derived |
| Reversibility Documented | no |
| MCP Server | no |
| Auth Clarity | no |
| Idempotency | no |
| Error Semantics | no |
| OpenAPI Examples | verified |
| 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 (13)

- **Starknet JSON-RPC Specification** — Versioned JSON-RPC specification implemented by Starknet full nodes (Pathfinder, Juno, Papyrus) and infrastructure providers. Defines read methods (starknet_* for blocks, transa...
- **Starknet Mainnet RPC (Public Providers)** — Starknet Mainnet (chain ID SN_MAIN) is reached via the Starknet JSON-RPC at hosted providers — Infura, Alchemy, Blast, Nethermind Voyager, Lava, Chainstack — or via self-hosted ...
- **Starknet Sepolia RPC (Public Providers)** — Public JSON-RPC endpoint for Starknet Sepolia testnet (chain ID SN_SEPOLIA) for development and integration testing.
- **StarkGate Bridge** — Canonical L1<->L2 bridge for ETH and ERC-20 tokens between Ethereum and Starknet, operated by StarkWare. Bridge contracts are open-source.
- **starknet.js SDK** — JavaScript / TypeScript SDK for Starknet — providers, accounts, contract classes, ABI parsing, transaction signing, and integration with browser wallets via the wallet API (get-...
- **starknet.py SDK** — Python SDK for Starknet maintained by Software Mansion, covering account / contract interaction, Cairo ABI handling, and the Starknet JSON-RPC.
- **starknet-rs SDK** — Rust SDK for Starknet with high-performance providers, accounts, contract bindings, ABI codegen, and Cairo serialization.
- **Cairo Language** — Cairo is StarkWare's Turing-complete language for creating provable programs and the canonical smart contract language for Starknet. Distributed as the Cairo compiler (Rust) and...
- **Pathfinder Full Node** — Rust implementation of a Starknet full node from Equilibrium that serves the Starknet JSON-RPC, syncs from Ethereum L1 data, and verifies state transitions.
- **Juno Full Node** — Go implementation of a Starknet full node from Nethermind that serves the Starknet JSON-RPC and acts as a sequencer / RPC backend.
- **Voyager Block Explorer** — Nethermind-built block explorer for Starknet Mainnet and Sepolia with a public REST API for blocks, transactions, contracts, classes, events, and tokens.
- **Starkscan Block Explorer** — Block explorer for Starknet Mainnet, Sepolia, and Sepolia Integration with a public REST API for blocks, transactions, events, classes, and NFTs.
- **Starknet Starknet JSON RPC API API** — The Starknet JSON RPC API API from Starknet — 1 operation(s) for starknet json rpc api.

## Agentic access (1)

- **Starknet Agentic Access** — 1 operation · 1 acting

## Security (1)

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

## Plans (1)

- **Starknet Plans Pricing**

## Tags

Layer 2, Ethereum, Validity Rollup, ZK, Cairo, STARK, JSON-RPC, Bridge

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