Per-Message Billing for Email, SMS, and Voice APIs

import { settlegrid } from '@settlegrid/mcp'
import { Resend } from 'resend'

const sg = settlegrid.init({
  toolSlug: 'my-email-service',
  pricing: {
    methods: {
      'send_email': { costCents: 1 },
      'send_sms': { costCents: 3 },
    },
  },
})

const resend = new Resend(process.env.RESEND_API_KEY)

const billedEmail = sg.wrap(async (args: { to: string; subject: string; body: string }) => {
  const result = await resend.emails.send({
    from: 'notifications@myapp.com',
    to: args.to,
    subject: args.subject,
    html: args.body,
  })
  return { content: [{ type: 'text', text: `Email sent: ${result.id}` }] }
}, { method: 'send_email' })