Easyby Coinbase

Coinbase CDP

Creator of the x402 protocol. Reference implementation and largest x402 facilitator with ~25-33% market share. Comprehensive SDK ecosystem across TypeScript, Python, Go, and Java. Production-grade infrastructure with 5.8k GitHub stars and enterprise-level reliability.

Last researched: 2026-03-30

Supported Chains

BaseEthereumPolygonSolanaKeetaSoneium

Pricing

Free

Up to 1,000 transactions per month

Free

Standard

Per-transaction fee after free tier

$0.001/tx

SDKs & Libraries

JavaScript / TypeScript

@coinbase/x402-client@x402/express@x402/hono@x402/fetch

Python

coinbase-x402

Go

coinbase-x402-go

Java

coinbase-x402-java

Setup Steps

1
Create a Coinbase Developer Platform account
2
Install the appropriate SDK for your language (e.g., @x402/express for Node.js)
3
Add 1-line server integration to protect your API endpoint
4
Configure the facilitator URL (https://facilitator.cdp.coinbase.com)
5
Test with a small USDC payment on Base testnet

Use Cases

•Agent-to-API micropayments for AI inference
•Pay-per-call API monetization
•Enterprise-grade x402 infrastructure
•Multi-language backend integration

Pros & Cons

Pros

+Reference implementation with best-in-class documentation
+Enterprise-grade reliability backed by Coinbase
+5.8k GitHub stars and active community
+Multi-language SDK support (TS, Python, Go, Java)
+1-line server integration

Cons

-$0.001/tx fee after 1,000 free transactions per month
-Shared settlement wallet (not self-custody)

Links

Documentation→GitHub→Website→Facilitator→