realmint_x402_buy_challenge

io.github.realmint-io/mcp · Verify this server

Get the x402 payment requirements to fund yourself in USDC so you can buy RWAs — the agent-native on-ramp. This returns the 402 challenge only; it moves no funds. To complete funding (two signatures total, the same a human gives), the agent then, ENTIRELY CLIENT-SIDE: 1. Reads `accepts[0]` from the returned body: `payTo` is YOUR Base smart account (derived from `owner_eoa`), `maxAmountRequired` the USDC atomic amount, `asset` the Base USDC contract, `extra` the EIP-712 domain. 2. Signs an EIP-3009 `transferWithAuthorization(from=owner_eoa, to=payTo, value=maxAmountRequired, ...)` over that domain, base64-encodes the x402 PaymentPayload, and re-POSTs to `/v1/route/x402-buy` with it in the `X-PAYMENT` header. On settlement the USDC bridges custody-free to your Injective smart account. 3. Buys any RWA from that Injective balance via `POST /v1/route/intent` (signing the route as usual). The asset rests in your smart account; `send` it elsewhere if you want — exactly like a human user. Always verify `payTo` derives from your own `owner_eoa` before signing. Args: owner_eoa: Your EVM EOA — the payment signer and smart-account owner. amount_usdc: USDC to fund yourself with (human units, e.g. 25.0). asset_id: Optional RWA you intend to buy, recorded for context.