Send SMS (Own Line)

Send SMS from your exclusive phone line. $0.05 per message after your included quota is used (10k first month, 5k/mo after). Requires Privy bearer plus x402 payment.

Authorization

x402 bearer

X-PAYMENT<token>

x402 payment header. When a request is sent without payment, the server returns 402 Payment Required with the price and payTo address. The caller signs an EIP-3009 transferWithAuthorization for USDC on Base and resubmits with the signed payment in this header. See https://docs.x402.org

In: header

AuthorizationBearer <token>

Privy access token (dashboard sessions, ~1h TTL) or long-lived dial_live_* / dial_test_* API key minted from /dashboard/billing. API keys are scope-gated per route (sms:send, numbers:read, account:read, etc.); Privy sessions bypass scope checks. See /docs/api-reference/api-keys for the full scope catalogue.

In: header

Request Body

application/json

TypeScript Definitions

Use the request body type in TypeScript.

phoneNumber?string

Your phone number to send from

to*string

Recipient phone number (E.164)

message*string

SMS message body (max 900 chars)

Response Body

`application/json`

curl -X POST "https://payphone.wtf/api/v1/numbers/mine/send" \  -H "Content-Type: application/json" \  -d '{    "to": "string",    "message": "string"  }'

{
  "success": true,
  "provider": "string",
  "messageId": "string"
}

{
  "x402Version": 2,
  "accepts": [
    {
      "scheme": "exact",
      "network": "eip155:8453",
      "amount": "100000",
      "payTo": "string"
    }
  ]
}

Authorization

Request Body

Response Body

200application/json

402application/json

`application/json`

`application/json`