Base website screenshot

Base

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.

Base publishes 1 API on the APIs.io network: JSON-RPC API. Tagged areas include Layer 2, Ethereum, OP Stack, Superchain, and JSON-RPC.

Base’s developer surface includes documentation, GitHub presence, status page, engineering blog, and 12 more developer resources.

🌐 Visit website 📡 Source on GitHub
31.9/100 thin ▬ flat Agent 27/100 agent aware Full breakdown ↓
scored 2026-08-20 · rubric v0.12.0
AccessFree
10 APIs
Layer 2EthereumOP StackSuperchainJSON-RPCSmart WalletBridge

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-08-20 · rubric v0.12.0
Composite quality — 31.9/100 · thin
Contract Quality 11.4 / 21
Developer Ergonomics 2.4 / 17
Access Clarity 4.9 / 17
Operational Transparency 4.4 / 11
Contract Governance 0.0 / 10
Discoverability 6.9 / 9
Regulatory Posture 1.4 / 15
Agent readiness — 27/100 · agent aware
Machine-Readable Contract 18 / 18
Agentic Access Contract 10 / 10
Documented Reversibility 0 / 6
MCP Server 0 / 12
Machine-Readable Auth 0 / 10
Idempotency 0 / 9
Stable Error Semantics 0 / 8
Request/Response Examples 7 / 7
Rate-Limit Signaling 7 / 7
Typed Event Surface 0 / 6
Agent Skills 0 / 5
Well-Known Catalog 0 / 4
Consent & Bot Identity 0 / 3
A2A Agent Card 0 / 8
Dry-Run / Simulate Mode 0 / 4
Regulatory Posture applies to this provider. Its tags matched the Payments regime, so Regulatory Posture carries 15 points of the composite. If this regime is wrong for your business, say so on your provider repo — the applicability map is public and we will correct it.
The six quality facets above are damped to 85 points between them, because the conditional facet above carries the other 15. That is why each facet's contribution is shown against a damped maximum: raising a quality facet moves the composite by 85% of its nominal weight, not 100%. The full arithmetic is at apis.io/rating/.
Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. This rating is computed from github.com/api-evangelist/base-l2: open an issue to ask a question, or submit a pull request to add artifacts. Want it done for you? Prioritized profiling — $2,500 →

APIs 10

Individual APIs this provider publishes, each with its own machine-readable definition.

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

Scroll for all 10

Open Collections 3

Open, tool-agnostic API collections (OpenAPI-derived and Bruno).

API Collection

OPEN COLLECTION

Base JSON-RPC API

OPEN COLLECTION

Base JSON-RPC API

OPEN COLLECTION

GraphQL 1

GraphQL schemas published by this provider.

Base GraphQL API

GRAPHQL

Pricing Plans 1

Published pricing tiers and plan structures.

Base L2 Plans Pricing

1 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Base L2 Rate Limits

2 limits

RATE LIMITS

FinOps 1

Cost, billing, and metering signals for API financial operations.

Base L2 Finops

FINOPS

Security Posture 1

Authentication, domain security, vulnerability disclosure, and trust-center signals.

Base L2 Domain Security

TLSv1.3 · HSTS · DNSSEC · DMARC

SECURITY

Agentic Access 1

Recommended x-agentic-access execution contracts for AI agents.

Base L2 Agentic Access

1 operation · 1 acting

1 operations · 1 acting

AGENTIC

Resources

Documentation 1

Reference material describing how the API behaves

Documentation
Documentation

Agent Surfaces 2

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess
AgenticAccess
 LlmsText
LlmsText

Build 2

SDKs, sample code, and the tooling you integrate with

GitHub
GitHub
 GitHubOrganization
GitHubOrganization

Access & Security 1

Authentication, authorization, and security posture

DomainSecurity
DomainSecurity

Operate 4

Status, limits, changes, and where to get help

IssueTracker
IssueTracker
 Releases
Releases
 Status
Status
 Discord
Discord

Commercial 1

Pricing, plans, and the legal terms of use

License
License

Company 3

The organization behind the API

Website
Website
 Twitter
Twitter
 Blog
Blog

Other 2

Properties that don't map to a standard resource type

Bridge
Bridge
 Ecosystem
Ecosystem

Source (apis.yml)

apis.yml Raw ↑ 
aid: base-l2
url: https://raw.githubusercontent.com/api-evangelist/base-l2/refs/heads/main/apis.yml
name: Base
kind: company
description: 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.
accessModel:
  pricing: free
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Free
  confidence: medium
  source:
  - plans
  generated: '2026-07-22'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/base-l2.png
tags:
- Layer 2
- Ethereum
- OP Stack
- Superchain
- JSON-RPC
- Smart Wallet
- Bridge
created: '2026-05-23'
modified: '2026-05-23'
specificationVersion: '0.23'
apis:
- aid: base-l2:mainnet-rpc
  name: Base Mainnet JSON-RPC
  description: 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 public endpoint is rate-limited and not recommended for production;
    teams typically front it with Alchemy, QuickNode, Infura, Coinbase Developer Platform, or self-hosted op-geth + op-node.
  humanURL: https://docs.base.org/chain/network-information
  baseURL: https://mainnet.base.org
  tags:
  - JSON-RPC
  - Mainnet
  - EVM
  properties:
  - type: Documentation
    url: https://docs.base.org/chain/network-information
  - url: graphql/base-l2-graphql.md
    type: GraphQL
- aid: base-l2:sepolia-rpc
  name: Base Sepolia JSON-RPC
  description: Public JSON-RPC endpoint for the Base Sepolia testnet (chain ID 84532) used for development, contract deployment,
    and integration testing.
  humanURL: https://docs.base.org/chain/network-information
  baseURL: https://sepolia.base.org
  tags:
  - JSON-RPC
  - Testnet
  - Sepolia
  properties:
  - type: Documentation
    url: https://docs.base.org/chain/network-information
- aid: base-l2:flashblocks-rpc
  name: Base Flashblocks RPC
  description: 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.
  humanURL: https://docs.base.org/chain/flashblocks
  baseURL: https://mainnet-preconf.base.org
  tags:
  - Flashblocks
  - Pre-Confirmation
  - JSON-RPC
  properties:
  - type: Documentation
    url: https://docs.base.org/chain/flashblocks
- aid: base-l2:bridge
  name: Base Bridge
  description: 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.
  humanURL: https://bridge.base.org
  baseURL: https://bridge.base.org
  tags:
  - Bridge
  - L1
  - L2
  - Canonical
  properties:
  - type: Documentation
    url: https://docs.base.org/chain/bridges-mainnet
  - type: App
    url: https://bridge.base.org
- aid: base-l2:solana-bridge
  name: Base / Solana Bridge
  description: Cross-chain bridge enabling asset transfers between Base and Solana, integrated into the Base ecosystem app
    surface.
  humanURL: https://docs.base.org/chain/base-solana-bridge
  baseURL: https://docs.base.org/chain/base-solana-bridge
  tags:
  - Bridge
  - Solana
  - Cross-Chain
  properties:
  - type: Documentation
    url: https://docs.base.org/chain/base-solana-bridge
- aid: base-l2:account
  name: Base Account / Smart Wallet
  description: 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 SDK + React component integrations.
  humanURL: https://docs.base.org/base-account
  baseURL: https://docs.base.org/base-account
  tags:
  - Smart Wallet
  - Account Abstraction
  - ERC-4337
  - Passkeys
  properties:
  - type: Documentation
    url: https://docs.base.org/base-account
  - type: Website
    url: https://www.smartwallet.dev
- aid: base-l2:onchainkit
  name: OnchainKit
  description: React component library and TypeScript SDK (@coinbase/onchainkit) for building onchain apps on Base — wallet,
    identity, transaction, swap, checkout, fund, and NFT components with built-in Smart Wallet and Mini App support.
  humanURL: https://docs.base.org/onchainkit
  baseURL: https://www.npmjs.com/package/@coinbase/onchainkit
  tags:
  - SDK
  - React
  - Components
  - Onchain
  properties:
  - type: Documentation
    url: https://docs.base.org/onchainkit
  - type: Repository
    url: https://github.com/coinbase/onchainkit
- aid: base-l2:basescan-explorer
  name: BaseScan Block Explorer
  description: Etherscan-family block explorer for Base Mainnet and Sepolia with a public contract / transaction / address
    API.
  humanURL: https://basescan.org
  baseURL: https://api.basescan.org/api
  tags:
  - Block Explorer
  - BaseScan
  tags_raw:
  - Block Explorer
  - API
  - BaseScan
  properties:
  - type: Documentation
    url: https://docs.basescan.org
  - type: Website
    url: https://basescan.org
- aid: base-l2:blockscout-explorer
  name: Base Blockscout Block Explorer
  description: Blockscout-powered open-source block explorer for Base with REST and GraphQL APIs.
  humanURL: https://base.blockscout.com
  baseURL: https://base.blockscout.com/api
  tags:
  - Block Explorer
  - Blockscout
  tags_raw:
  - Block Explorer
  - Blockscout
  - API
  properties:
  - type: Website
    url: https://base.blockscout.com
- aid: base-l2:base-l2-json-rpc-api
  name: Base JSON-RPC API
  description: Ethereum JSON-RPC 2.0 endpoint
  humanURL: https://docs.base.org/chain/network-information
  baseURL: https://mainnet.base.org
  tags:
  - JSON-RPC
  properties:
  - type: OpenAPI
    url: openapi/base-l2-json-rpc-api-openapi.yml
common:
- type: IssueTracker
  url: https://github.com/coinbase/onchainkit/issues
- type: Releases
  url: https://github.com/coinbase/onchainkit/releases
- type: License
  name: MIT
  url: https://github.com/coinbase/onchainkit/blob/main/LICENSE
- type: AgenticAccess
  url: agentic-access/base-l2-agentic-access.yml
- type: DomainSecurity
  url: security/base-l2-domain-security.yml
- type: Website
  url: https://www.base.org
- type: Documentation
  url: https://docs.base.org
- type: GitHub
  url: https://github.com/base-org
- type: GitHubOrganization
  url: https://github.com/base
- type: Status
  url: https://status.base.org
- type: Bridge
  url: https://bridge.base.org
- type: Ecosystem
  url: https://www.base.org/ecosystem
- type: Twitter
  url: https://x.com/base
- type: Discord
  url: https://discord.gg/buildonbase
- type: Blog
  url: https://base.mirror.xyz
- type: LlmsText
  url: https://docs.base.org/llms.txt
integrations:
- name: Ethereum
- name: Optimism Superchain
- name: OP Stack
- name: Coinbase
- name: Solana (bridge)
- name: Alchemy
- name: QuickNode
- name: Infura
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com