Send x402

Send Value, Not Tokens

The value transmission protocol for the autonomous machine economy

Mechanics — x402 Atomic Payment (Permit2 Edition)

Step 1 — Payment Metadata Request

  • Client → Server
  • GET /api/x402/payment?amount=10&recipient=0x…&token=USDC
  • Server returns HTTP 402 with Permit2 EIP-712 authorization metadata:
    • domain
    • types.PermitTransferFrom
    • permitted token + amount
    • nonce and deadline
    • spender = Presale contract address

Step 2 — Wallet Signs Permit2 Authorization

  • User signs via signTypedData(domain, types, message)
  • No login required
  • No gas required
  • Single signature completes authorization

Step 3 — Atomic Settlement via Relayer

  • Client → Relayer → Blockchain
  • POST /api/x402/relayer-pay { meta, sig }
  • On-chain execution sequence:
    • Permit2.permitTransferFrom
    • Stablecoin transfer
    • Presale.mint SEND
  • Entire flow merged into a single atomic transaction

Step 4 — Settlement Finality

  • Relayer returns final status: { "status": "verified", "txHash": "0x..." }
  • SEND successfully minted
  • Atomic settlement, irreversible

Ecosystem — Permit2 Atomic Payments

Block 1 — Permit2 Authorization

Non-replayable EIP-712 authorization structure for atomic cross-token authorization.

Block 2 — HTTP-Native Flow

GET → 402 → sign → settle

HTTP as the value transmission interface.

Block 3 — Atomic Settlement

Complete payment + mint + settlement in a single on-chain transaction.

Block 4 — Accountless

No account system required.

Wallet is identity, signature is settlement.

Block 5 — AI-Executable Metadata

Structured EIP-712 metadata designed for autonomous agents and intelligent services.

Block 6 — Instant Finality

Relayer instantly confirms on-chain finality, returning verifiable txHash.

Mint

You are no longer just transferring tokens. You are sending value.

Mint SEND

Token

SEND token specifications and economics

ParameterValue
Token NameSend x402
SymbolSEND
Total Supply8,000,000,000 SEND
Decimals18
Supported ChainBNB Chain
Token StandardBEP-20
Presale Goal400,000 USDC
Price0.01 USDC per SEND
Payment Range10 - 2,000 USDC (multiples of 10)
Narrative KeywordsPayFi · Machine Economy · Instant Value Transfer

Join

Connect with the x402 community