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Tool Comparison

USDC vs PYUSD for AI Agent Payments

USDC and PYUSD are both regulated USD stablecoins. For x402-style agent payments, USDC has a meaningful integration lead — Coinbase's CDP facilitator settles USDC by default, and most x402 SDKs assume USDC.

Feature USDC PYUSD
Issuer Circle PayPal / Paxos
Primary chain Ethereum, Base, many Winner Ethereum, Solana
x402 SDK default Yes Winner No
EIP-3009 support Yes Yes
USDC Wins
2
Ties
2
PYUSD Wins
0

Final Verdict

Default to USDC for x402 agent payments today. Add PYUSD only if your agent population is PayPal-anchored.

Why default matters

x402 servers have a default asset. Buyers without overriding configuration will pay in that default. USDC is the default in every reference implementation today.

Pro Tips

Servers can accept multiple assets; advertise USDC as the primary and others as alternates.
Related Resources
Browse x402 Agent Payments Blog Ideas Browse USDC on Base for AI Blog Ideas Browse x402 Facilitators Blog Ideas Compare: USDC vs PYUSD Compare: USDC vs EURC
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All Niches
x402 Agent Payments x402 Facilitators Agent Micropayments USDC on Base for AI Coinbase Bazaar Listings MCP Tool Marketplaces Agent-to-Agent Commerce Agent Trust & Reputation Agent Payment Protocols Autonomous Agent Billing Crypto Rails for AI
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x402 Agent Payments x402 Facilitators Agent Micropayments USDC on Base for AI Coinbase Bazaar Listings MCP Tool Marketplaces Agent-to-Agent Commerce Agent Trust & Reputation Agent Payment Protocols Autonomous Agent Billing Crypto Rails for AI
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