One network.
Every signal. Delivered.

// Send an OTP — sandbox, no charge
curl -X POST https://api.pulsegrid.example/v2/otp \
  -H "Authorization: Bearer $GRID_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "to": "+852 5555 0100",
    "channel": ["sms", "whatsapp"],
    "ttl": 300
  }'

// 201 Created
{
  "id": "otp_9f3c1a",
  "status": "delivering",
  "expires_at": "2026-10-05T14:05:00Z"
}

// Reserve a local number
curl -X GET https://api.pulsegrid.example/v2/numbers \
  -H "Authorization: Bearer $GRID_KEY" \
  -G --data-urlencode "country=HK&type=mobile"

// 200 OK
{
  "numbers": [{"id": "n_8812", "e164": "+85255550142", "state": "available"}]
}

// Provision an eSIM profile
curl -X POST https://api.pulsegrid.example/v2/esim \
  -H "Authorization: Bearer $GRID_KEY" \
  -d '{
    "iccid": "89441120300011223344",
    "plan": "iot_5mb_monthly",
    "fallback_network": "partner_b"
  }'

// 202 Accepted — profile queued
{ "job": "esim_77da", "eta_s": 12 }

// Subscribe to delivery events
curl -X POST https://api.pulsegrid.example/v2/webhooks \
  -H "Authorization: Bearer $GRID_KEY" \
  -d '{
    "url": "https://your-app.example/hooks/grid",
    "events": ["message.delivered", "esim.ready"],
    "secret": "whsec_3f9a2c"
  }'

// 201 Created — signature: HMAC-SHA256
{ "id": "wh_204", "status": "active" }