# Coinbase OnchainKit

**Canonical:** https://apis.io/providers/coinbase-onchain-kit/  
**Website:** https://www.base.org/builders/onchainkit  
**APIs profiled:** 4

Coinbase OnchainKit is a TypeScript React framework from Coinbase for building onchain applications on Base and other EVM networks. It bundles ready-made React components (wallets, identity, transactions, swap, checkout, fund, NFT), TypeScript utilities, and integrations with Smart Wallet, Base Account, Frames, and Mini Apps. OnchainKit is distributed as the @coinbase/onchainkit npm package along with companion CLIs (create-onchain) and a MiniApp manifest generator. It is built on top of Wagmi, Viem, and TailwindCSS and is the recommended client SDK for the Base ecosystem.

## Kin Score — 18.5 / 100 (emerging)

Scored 2026-08-20 under rubric 0.12.0. Trend: flat (+0.0 from 18.5).

| Facet | Score |
|---|---|
| Discoverability | 81.5 |
| Contract Quality | 0.0 |
| 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 — 3.0 (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 | 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 (4)

- **OnchainKit React SDK** — Core @coinbase/onchainkit npm package providing React components and TypeScript utilities for onchain apps. Includes Wallet, Identity, Transaction, Swap, Checkout, Fund, NFT, To...
- **create-onchain CLI** — Bootstrap CLI (`npm create onchain`) that scaffolds a new OnchainKit application pre-wired with Wagmi, Viem, TailwindCSS, and Base. Generates starter projects for web apps and M...
- **OnchainKit MiniApp Manifest Generator** — Utility that generates the Mini App manifest required to publish a Frames-based Mini App to Farcaster and other Mini App hosts. Validates manifest fields and handles signing.
- **Coinbase Smart Wallet Integration** — OnchainKit components and connectors that expose Coinbase Smart Wallet — an ERC-4337 smart contract wallet — for sign-in, paymaster-sponsored transactions, passkeys, and session...

## Security (1)

- **Coinbase Onchain Kit Domain Security** — TLSv1.3 · HSTS · DNSSEC · DMARC

## Plans (1)

- **Coinbase Onchain Kit Plans Pricing**

## Tags

Onchain, Web3, React, SDK, Base, Smart Wallet, Frames, Mini Apps

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