X402blockchainsX402 LEARNING CENTER
x402 Payments, Facilitators and Blockchain Guides
Understand the protocol, choose a payment network and verify the evidence behind projects and tokens.
x402 USDC Payments: Tokens, Amounts and Settlement
Understand USDC payments in x402: network and asset identity, atomic amounts, gas sponsorship and receipt checks before granting API access.
x402 on Solana: Payments and Facilitator Selection
Learn how to evaluate x402 Solana payments, choose a compatible facilitator, verify token mints and connect receipts to paid API delivery.
Coinbase x402 Facilitator: Protocol, Base and Provider Roles
Separate the x402 protocol, Coinbase CDP Facilitator and Base network, then compare payment support, receipts and integration requirements.
x402 Blockchains and Assets: Bitcoin, Ethereum, Solana and XRP
Understand protocol support versus live provider coverage, and distinguish blockchains, native assets and stablecoin payments when researching x402.
x402 Tokens on CoinGecko and CoinMarketCap: Research Guide
Research CoinGecko and CoinMarketCap x402 token categories while keeping market data separate from protocol usage, payment volume and project claims.
What is x402?
Start with HTTP payment requirements, buyer authorization and the facilitator’s role.
All payment and project guides
- What is x402? A practical guide to HTTP payments
- How AI agents can pay for APIs with x402
- x402 payments: from the first request to the final receipt
- Choosing an x402 facilitator: what builders should check
- AI agents need payment budgets, not unlimited wallets
- How to read multichain x402 payment activity
- From discovery to useful work: building AI agents with x402
- Meet the new listings: Tanod, Horizon Pulse and Vextorium
- Trench Lessons: Solana research for payment-enabled AI agents
- Agent Kiosk brings paid Base API tools and MCP access to the directory
- agent-audit and page-read: two web tools with one shared payment recipient
- x402 Payment Retries: How to Avoid Charging Twice
- What Proves an x402 Payment? Requests, Receipts and Settlement
- Building an x402 API That AI Agents Can Use Reliably
- XPay Announces $1 Million Funding for x402 Payments
- x402 Payments for AI Agents: Pay Per API Call
- Base x402 Payments: How AI Agents Pay for APIs
- BNB Chain x402 Payments: API Payments, Fees and Receipts
- x402 API Pricing: How to Build a Pay-Per-Use Service
- How to Research x402 Payments with X402Blockchains
Looking for activity rather than an explanation? Open the x402 payment explorer or compare facilitator profiles. X402scan is a separate service; links to that platform are identified where used.