# Base

**Canonical:** https://apis.io/providers/base-l2/  
**Website:** https://www.base.org  
**APIs profiled:** 10

Base is Coinbase's Ethereum Layer 2 network built on the OP Stack and part of the Optimism Superchain. It exposes a standard Ethereum JSON-RPC interface for smart contracts and dApps, plus higher-level developer surfaces including Base Account (Smart Wallet, Sub Accounts, passkeys, paymaster-sponsored transactions), OnchainKit React components, Mini Apps, the canonical Bridge to Ethereum, and a Solana cross- chain bridge. Block exploration is available through BaseScan and Blockscout.

## Kin Score — 31.9 / 100 (thin)

Scored 2026-08-20 under rubric 0.12.0. Trend: flat (+0.0 from 31.9).

| Facet | Score |
|---|---|
| Discoverability | 81.5 |
| Contract Quality | 53.8 |
| Governance | 0.0 |
| Contract Governance | 0.0 |
| Operational Transparency | 39.5 |
| Developer Ergonomics | 14.3 |
| Commercial Clarity | 28.9 |
| Access Clarity | 28.9 |

Regulatory layer — **Payments**: 9.4 (matched via tags).

## Agent readiness — 26.5 (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 | no |
| 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)

- **Base Mainnet JSON-RPC** — Standard Ethereum JSON-RPC endpoint for Base Mainnet (chain ID 8453). Supports eth_*, net_*, web3_*, and Optimism-specific extensions for fee estimation and L1 messaging. The pu...
- **Base Sepolia JSON-RPC** — Public JSON-RPC endpoint for the Base Sepolia testnet (chain ID 84532) used for development, contract deployment, and integration testing.
- **Base Flashblocks RPC** — Pre-confirmation JSON-RPC endpoint exposing Flashblocks — sub-block streams of ordered transactions that allow apps to react to pending state with sub-second latency.
- **Base Bridge** — Canonical cross-chain bridge between Ethereum L1 and Base L2 for depositing and withdrawing ETH and ERC-20 tokens, secured by the OP Stack bridge contracts.
- **Base / Solana Bridge** — Cross-chain bridge enabling asset transfers between Base and Solana, integrated into the Base ecosystem app surface.
- **Base Account / Smart Wallet** — Base Account (formerly Coinbase Smart Wallet) is an ERC-4337 smart contract wallet with passkey sign-in, sub-accounts, session keys, sponsored transactions via paymaster, and SD...
- **OnchainKit** — React component library and TypeScript SDK (@coinbase/onchainkit) for building onchain apps on Base — wallet, identity, transaction, swap, checkout, fund, and NFT components wit...
- **BaseScan Block Explorer** — Etherscan-family block explorer for Base Mainnet and Sepolia with a public contract / transaction / address API.
- **Base Blockscout Block Explorer** — Blockscout-powered open-source block explorer for Base with REST and GraphQL APIs.
- **Base JSON-RPC API** — Ethereum JSON-RPC 2.0 endpoint

## Agentic access (1)

- **Base L2 Agentic Access** — 1 operation · 1 acting

## Security (1)

- **Base L2 Domain Security** — TLSv1.3 · HSTS · DNSSEC · DMARC

## Plans (1)

- **Base L2 Plans Pricing**

## Tags

Layer 2, Ethereum, OP Stack, Superchain, JSON-RPC, Smart Wallet, Bridge

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/providers/base-l2/). Scores are computed from the provider's own public artifacts under a published rubric.