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x402 (Coinbase)

Let APIs charge AI agents per request in stablecoins.

x402 (Coinbase)

Coinbase Developer Platform

Best for Let APIs charge AI agents per request in stablecoins

Chains
Solana Base Arbitrum Polygon
Price
Facilitator: 1,000 transactions free per month, then $0.001 per transaction (gas separate)

An open HTTP-402 payment protocol plus Coinbase's hosted facilitator, so an API can charge AI agents per request in stablecoins. The facilitator documents Base, Polygon, Arbitrum and Solana mainnets; 1,000 transactions a month are free, then a tenth of a cent each, plus gas.

Visit x402 (Coinbase) Checked Oct 15, 2026 against this source

Chain support, with sources

We only add a chain when the maker's own docs name it. "EVM-compatible" alone counts for no specific chain. This is what the docs say, not a test or security review.

Docs: docs.cdp.coinbase.com/x402/network-support

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