SMS API for Tonga: bulk SMS to +676 numbers

Tonga, in the South Pacific, has Nukuʻalofa as its capital and an economy based on agriculture, fishing, and tourism. Software products sending SMS include banks, travel agencies, and government services. Messages are triggered by events like payment confirmations, travel updates, and public announcements. SMS is chosen because it works on all mobile phones, including basic models, and is reliable across the islands.

Tonga

Calling code +676

Per SMS segment
$0.00707
Messages for $100
14,144
Local language
English and Pacific languages
Encoding
GSM-7

What a bulk SMS send to Tonga costs

Every message is priced at $0.00707 per segment to Tonga. Texts over 160 GSM-7 or 70 Unicode characters are split into segments, so a two-segment text costs twice as much.
Messages1 segment2 segments
1$0.00707$0.01414
1,000$7.07$14.14
10,000$70.70$141.40
100,000$707.00$1,414.00

Number format in Tonga

Mobile numbers in Tonga have 7 digits after +676 and no trunk prefix, so the local form 771 5123 becomes +676 771 5123 in the to field.

Alphabet and segments

English and Pacific languages text stays inside the GSM-7 alphabet, so one segment to Tonga holds 160 characters and each part of a longer text 153. Watch for curly quotes and emoji copied from other tools: one of them moves the whole text to Unicode at 70 characters per segment, and POST /v1/estimates shows the encoding before you send.

Time zone and timing

Tonga keeps UTC+13 all year with no clock change, so 09:00 in Tongatapu is always 20:00 UTC. send_at takes UTC or any ISO 8601 offset, and the console scheduler converts from your own time zone.

Send to Tonga with one request

The answer comes back at once with the message id, the country the number was matched to (TO) and the price. A delivered or failed event follows on your webhook, and a failed message is refunded.

For a list, send the same text to up to 10,000 numbers with POST /v1/batches, or a personal text per number in messages.

curl https://bulksmsapi.cc/v1/messages \
  -H "Authorization: Bearer $BULKSMSAPI_KEY" \
  -H "Content-Type: application/json" \
  -d '{"to": "+6767715123", "text": "Your Northwind code is 482913. It expires in 10 minutes."}'

What developers send to Tonga

Common integrations that call the SMS API for recipients in Tonga.

Payment alerts

Banks in Nukuʻalofa send SMS to customers confirming successful transactions or loan payments.

Travel updates

Travel agencies in Tonga notify tourists about changes in flight schedules or ferry timings for islands like Vavaʻu.

Public announcements

Government services send SMS to residents in regions like Haʻapai about important updates or emergency alerts.

Event reminders

Cultural organizations in Nukuʻalofa use SMS to remind attendees about festivals or community events.

SMS to Tonga: questions

More answers on accounts, payments and the API are in the FAQ.

How much does it cost to send bulk SMS to Tonga?

Each message segment to Tonga costs $0.00707. A plain text of up to 160 characters is one segment, so 1,000 one-segment messages cost $7.07 and 10,000 cost $70.70. Failed messages are refunded to the balance.

How many SMS to Tonga does a $100 top-up send?

$100 covers about 14,144 one-segment messages to Tonga at $0.00707 each. The first top-up adds a bonus on top, which raises that number. The balance is shared by every country, so the same top-up also pays for messages anywhere else on the list.

How do I write Tonga numbers for the API?

Send them in international format with the plus sign: +676 771 5123 becomes "+6767715123" in the to field. The API also accepts spaces, dashes and a 00 prefix and cleans them, and numbers that cannot be read are listed in set_aside instead of being charged.

Which language should SMS be sent in?

Tongan is the official language, but English is also widely understood. Use Tongan for broader reach in rural areas.

How to reach expatriates and visitors?

Include English in messages for expatriates and tourists, especially in Nukuʻalofa and tourist areas like Tongatapu.

Start sending to Tonga

Create an account, top up from $40 and send to Tonga at $0.00707 per segment, from the console or with one API call.

SMS API Tonga: Bulk SMS to +676 From $0.00707 | BulkSMSAPI