Tired of “sign up, add card, get API key” loops? Bazaar + x402 flips the model — your AI agent can now discover, pay, and use APIs directly via HTTP 402 responses — no accounts, no subscriptions. In this post, we walk you through building a full 402-powered API Bazaar: 🧭 List and discover services 💳 Handle pay-per-request APIs with x402 🔁 Automate payments and retries 🧪 Run the entire loop in one Node.js script Build a pay-as-you-go Web3 API marketplace your agents can use autonomously.

Tired of “sign up, add card, get API key” loops? Bazaar + x402 flips the model — your AI agent can now discover, pay, and use APIs directly via HTTP 402 responses — no accounts, no subscriptions. In this post, we walk you through building a full 402-powered API Bazaar: 🧭 List and discover services 💳 Handle pay-per-request APIs with x402 🔁 Automate payments and retries 🧪 Run the entire loop in one Node.js script Build a pay-as-you-go Web3 API marketplace your agents can use autonomously.

Today, let’s talk about a common pain point in the blockchain ecosystem. If you want your users to enjoy a web2-like experience in an onchain application, you have to hide all the complexities, such as managing wallets, enforcing compliance rules, and sometimes even sponsoring gas. Doing all this securely and at scale is tough. That’s where Server Wallets from Coinbase Developer Platform (CDP) come in. They let you create and manage wallets programmatically, send transactions, enf...

Today, let’s talk about a common pain point in the blockchain ecosystem. If you want your users to enjoy a web2-like experience in an onchain application, you have to hide all the complexities, such as managing wallets, enforcing compliance rules, and sometimes even sponsoring gas. Doing all this securely and at scale is tough. That’s where Server Wallets from Coinbase Developer Platform (CDP) come in. They let you create and manage wallets programmatically, send transactions, enf...

IntroductionWhat’s the biggest bottleneck when building data-rich on-chain apps? It’s not your idea — it’s the engineering headache of getting reliable, queryable blockchain data. For years, developers had two painful choices:Run your own indexing infra (expensive and brittle).Rely on rigid REST endpoints that can’t answer your custom questions.The Coinbase Developer Platform SQL API changes that. It’s a zero-infrastructure, production-grade indexing solution that lets you query live and hist...

IntroductionWhat’s the biggest bottleneck when building data-rich on-chain apps? It’s not your idea — it’s the engineering headache of getting reliable, queryable blockchain data. For years, developers had two painful choices:Run your own indexing infra (expensive and brittle).Rely on rigid REST endpoints that can’t answer your custom questions.The Coinbase Developer Platform SQL API changes that. It’s a zero-infrastructure, production-grade indexing solution that lets you query live and hist...

Seed phrases, gas pop-ups, “approve then transfer” — the classic wallet UX slows users (and your growth) to a crawl. Base Accounts fix this. Built on ERC-4337, they’re a programmable, multi-chain account layer that unlocks passkeys, social recovery, sponsored gas, batching, and more. In this hands-on guide, you’ll learn why Base Accounts matter and how to ship a production-grade app: passwordless auth, one-tap USDC payments, gasless calls, sub-accounts for zero-prompt interactions...

Seed phrases, gas pop-ups, “approve then transfer” — the classic wallet UX slows users (and your growth) to a crawl. Base Accounts fix this. Built on ERC-4337, they’re a programmable, multi-chain account layer that unlocks passkeys, social recovery, sponsored gas, batching, and more. In this hands-on guide, you’ll learn why Base Accounts matter and how to ship a production-grade app: passwordless auth, one-tap USDC payments, gasless calls, sub-accounts for zero-prompt interactions...