x402
x402 is an entry in this index of agent wallets and payment rails; every fact links back to the vendor's docs or the protocol spec.
Open HTTP 402 payment standard: a server answers 402 with payment terms, the client signs a payload, retries, and settles on chain. Rail-agnostic; USDC on Base and Solana dominate live use.
- Address
- Online, Global
- Website
- www.x402.org
- Organization
- x402 Foundation
- Status
- Live
- Rail
- Mixed
- Chains
- Base, Solana
- Protocols
- X402
- Per-call minimum
- None in the spec; facilitators and sellers set floors
- Spend caps
- None published
- Human approval
- None
- KYC needed
- Varies
- Custody
- not applicable
- MCP support
- Community
- Fees
- Set by the facilitator; the Coinbase facilitator is free on Base
- Licence
- Apache-2.0
Questions
Where is x402?
x402 is at Online, Global.
How do I contact x402?
To contact x402, visit https://www.x402.org.
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