Payzum Blog

Crypto Payments Blog

Non-custodial, crypto-only payments — explained for the operators and developers who actually run the money. Pain, mechanics, and how Payzum solves it.

x402 / Agentic

x402 vs API Key Billing: Why Per-Call Wins for Agents

API keys and subscriptions were built for humans who sign up and stay. AI agents do neither. Here's x402 vs API key billing — and why per-call settlement is the model the machine economy actually needs.

13 min read
x402 / Agentic

Let AI Agents Pay for Your API: A Practical Guide

AI agents can call your API but can't sign up or hold a card. Here's how to let AI agents pay for your API per call in USDC on Base — non-custodial, no code.

12 min read
x402 / Agentic

x402 Pay Per API Call: Let AI Agents Pay Your API

What x402 is, how the HTTP 402 payment flow works, and how to let AI agents pay per API call in USDC on Base — non-custodially, straight to your wallet.

13 min read