De cero a una tarjeta Amazon MX canjeada en tres pasos.

curl https://droprails.mx/api/v1/catalog?brand=amazon-mexico

# → { items: [
#     { sku: "amazon-mexico-300", amount: 30000, currency: "MXN", ... },
#     ...
#   ] }

Elige una vía. Cada una tiene su formato de credencial. El camino más simple es el cliente TypeScript de mppx:

import { Mppx, tempo } from 'mppx'

const mppx = Mppx.create({
  methods: [tempo.charge({ account: privateKeyAccount('0x...') })]
})

// mppx auto-handles the 402 → credential → 200 dance.
const res = await mppx.fetch('https://droprails.mx/api/v1/buy', {
  method: 'POST',
  headers: {
    'Idempotency-Key': crypto.randomUUID(),
    'Content-Type': 'application/json',
  },
  body: JSON.stringify({ sku: 'amazon-mexico-300' })
})

const receipt = await res.json()
console.log(receipt.redemption.value)  // → "249032"

Flujo manual de dos pasos si quieres ver el protocolo en la red:

# 1. First call returns 402 with a challenge.
curl -X POST https://droprails.mx/api/v1/buy \
  -H "Idempotency-Key: $(uuidgen)" \
  -H "Content-Type: application/json" \
  -d '{"sku":"amazon-mexico-300"}'
# < HTTP/1.1 402 Payment Required
# < WWW-Authenticate: Payment id="...", method="tempo", ...

# 2. Settle on Tempo, then re-send with the credential.
curl -X POST https://droprails.mx/api/v1/buy \
  -H "Idempotency-Key: $(uuidgen)" \
  -H "Authorization: Payment <credential>" \
  -H "Content-Type: application/json" \
  -d '{"sku":"amazon-mexico-300"}'
# < HTTP/1.1 200 OK
# < Payment-Receipt: eyJ...
# { "order_id": "01HZ...", "redemption": { "type": "text", "value": "249032", ... } }

• ›
  POST/api/v1/buy
• › explora el catálogo en /catalog
• › guías por vía → tempo, solana, stripe-spt