#payments
4 resources and 8 guides tagged #payments on ChangeGamer.
- Paying for Access: The HTTP 402 Flow How autonomous agents encounter, interpret and satisfy HTTP 402 Payment Required responses on ChangeGamer.
- Agentic Commerce Protocol, x402, and Payment Gates for Agents What the Agentic Commerce Protocol (ACP) is and how it differs from AP2, plus an implementor's comparison of the three live content-payment mechanisms — self-hosted HTTP 402 gates, Cloudflare Pay Per Crawl, and the x402 open standard — and how RSL fits as the licensing layer, not the settlement layer.
- Agent Wallets: Paying Per Run with x402 Buyer-side guide to giving an AI agent a wallet: how the x402 payment loop works, the client libraries that automate it, spend controls, and what 20,000+ Apify Actors on x402 mean for agent tool budgets.
- Selling to Agents: Charging AI Agents for Your API or Content Seller-side guide to monetizing agent traffic: self-hosted HTTP 402 gates, native x402 with automatic Bazaar listing, marketplace publishing, and crawl licensing — with an honest status ledger from a site that runs these rails in production.
Guides
- x402 Protocol and the Guide to Selling to AI Agents The operator playbook for the x402 protocol and selling content, APIs and tools to AI agents that discover, evaluate and pay on their own.
- Agent Checkout vs. Human Checkout: Why Your Payment Flow Fails Machine Buyers Why checkout built for a person watching a screen is unusable by an AI agent, and what a checkout flow that actually completes for a machine buyer looks like — 402 + API key versus native x402.
- ACP vs. AP2 vs. x402: Which Agent Payment Rail Should You Implement? A decision framework for choosing between ACP, AP2, and x402 (plus the self-hosted 402 gate) — sorted by who your buyer actually is, what you are selling, and what is live versus waitlisted as of July 2026.
- How to Accept x402 Stablecoin Payments: A Seller Implementation Guide A build guide for sellers who have already decided x402 is the right rail: the 402 response shape, the wallet/facilitator/network choices, the verify-then-settle retry flow, exact vs. upto pricing, and how to ship it dormant until you are ready to go live.
- Issuing API Keys to AI Agents Automatically: A Build Guide How to design a system that mints and delivers API keys to agent and software buyers with minimal human friction: trigger models, storage, delivery, key format, tiering, rotation and revocation — illustrated with ChangeGamer's own Stripe-webhook mechanism.
- Agent Spend Limits and Trust: What a Seller Should Verify Before Granting Access The seller-side counterpart to agent spend controls — how an API operator reads an inbound agent's spend ceiling before granting access, which payment protocols actually prove that ceiling, how to revoke access, and what "trust" operationally means for a seller when no portable agent-reputation standard exists yet.
- Refunds and Disputes with Agent Buyers: What a Seller Actually Does What happens on the seller side when an autonomous agent's purchase needs to be reversed or is disputed — API-key refund mechanics, why x402 settlement cannot be undone, what card-token revocation does and does not prove, and what to log before you reverse anything.
- Measuring Revenue from AI Agent Traffic: Beyond the Traffic Log The revenue-layer fields and queries a seller adds on top of a general traffic log — authorized-vs-settled, revenue per rail, revenue per tier, and how to avoid double-counting a webhook retry as two sales.