A Pre-Flight Checklist for Cayman Islands Verification Numbers

Pre-flight checklist: what should be ready before you order a +1 345 number?

Run through this list once and the first Cayman activation tends to be uneventful:

• Account and security. Sign up with an email address and a 6-digit email code (or Google sign-in), then switch on TOTP two-factor for anyone who can spend from the wallet.
• Wallet funded. Top up the prepaid USD wallet by card or with USDT/USDC. There is no plan to choose and no monthly fee.
• API key. Create a key in the Developer console; it starts with or_live_ and goes in a Bearer header. An account can hold up to 10 keys.
• Webhook endpoint. Register a URL and keep its secret somewhere your handler can read it. Five endpoints per account is the ceiling.
• Phone parsing configured. Make sure your number library resolves area code 345 to the Cayman Islands rather than defaulting every +1 number to the United States.
• Sandbox, if you want a dry run. Ask support to flip a development account to sandbox mode so simulated numbers and codes exercise your integration without touching wallet funds.

The API reference lists every field you will see in responses.

Why does a Cayman number trip up code that assumes +1 means America?

The Cayman Islands sit inside the North American Numbering Plan, so they share country code 1 with the US, Canada and a long list of Caribbean territories. What identifies a Cayman line is the area code 345. A full number is ten digits after the country code, written locally as (345) NXX-XXXX and stored in E.164 as +1345 followed by seven digits.

Three practical consequences for engineers:

• Region detection must look at the area code. A sign-up form that infers country from the +1 prefix alone will label a Cayman customer as American and may pick the wrong time zone, currency or consent text.
• In NANP the leading 1 doubles as the long-distance trunk digit, so users sometimes type 1 345... or just 345.... Normalize all three to the E.164 string before saving.
• Store numbers without spaces, dashes or parentheses, and format them only at display time.

English is the official language, so codes for this market usually arrive in English. The exact wording, though, is set by whichever service sends the message, not by the route.

Which services can route codes to a Cayman Islands verification number?

The live snapshot for country ky currently includes WhatsApp, Telegram, Google (Gmail & YouTube), Microsoft & Outlook, LinkedIn, Amazon, Airbnb, Uber, Signal, Discord, ChatGPT (OpenAI), Netflix and eBay. Counting the long tail, the route covers more than 600 services, and the list moves during the day, which is why availability is always read from the API instead of hard-coded.

Teams usually need a +1 345 number for testing because the islands are a major offshore financial center and a busy tourism destination. Fund administrators, insurers, travel platforms and property businesses onboard local customers, and their product teams want to watch the sign-up flow behave the way a Cayman resident would experience it. The fintech onboarding notes cover that pattern in more depth.

Step by step: how does the Cayman Islands OTP API call sequence run?

All calls go to https://otproute.com/api/v1 with your Bearer key, within a limit of 300 requests per minute.

1. Call GET /api/v1/services once and cache the service ids your test suite needs.
2. Call GET /api/v1/prices?country=ky&service=<id> to read the live price and confirm the pairing is currently available.
3. Send POST /api/v1/activations with a body such as {"service": "<id>", "country": "ky"}. The response carries the activation id and the +1 345 number.
4. Enter that number in the app under test and trigger its SMS step.
5. Wait for activation.sms_received on your webhook. Check the X-OTPRoute-Signature header first: compute HMAC-SHA256 over <t>.<raw body> with the endpoint secret, compare it with v1, and reject stale timestamps.
6. Without a webhook, poll GET /api/v1/activations/{id} at a modest interval until the code appears or the window closes.
7. If the test aborts, call POST /api/v1/activations/{id}/cancel so the hold returns to the wallet.

The HMAC webhook guide walks through signature checks line by line.

Step by step for colleagues who prefer the dashboard

Support staff and account managers do not need to touch the API at all:

1. Open the OTP Gateway page in the dashboard.
2. Choose the Cayman Islands as the country, then the service you are verifying.
3. Check the price shown before ordering and confirm.
4. Copy the number into the app, request the code, and leave the activation page open; the SMS appears there when it arrives.

The 20-minute window and the refund apply exactly as they do through the API.

Troubleshooting: what if no code reaches the +1 345 number?

Nothing is charged for a silent activation. If no SMS arrives before the 20 minutes run out, or you cancel, the full amount goes back to the wallet on its own. Before ordering again:

• Let the window run. Delivery time depends on the service and the route, so a slow code is not necessarily a failed one.
• Check the service's policy. Some services refuse virtual numbers outright, which is exactly the situation the refund exists for.
• Retry later or switch route. Inventory changes through the day; a second attempt an hour later, or a neighbouring Caribbean country, can behave differently.
• Avoid tight loops. A script that cancels and re-orders every few seconds burns your rate limit and rarely helps.

The failed-delivery playbook has more diagnostics. Use each number only for your own product or your own business accounts, follow every service's terms, and remember that the OTP Route Acceptable Use Policy applies.

Can I keep a Cayman line long term, and how is billing handled?

No self-serve long-term number exists for the Cayman Islands. Sharing the +1 country code does not change that: Dedicated Numbers are a United States and Canada product only, from $1.95/month, with inbound SMS, outbound SMS and browser calling. If your team needs a permanent 345 line, email [email protected]; availability depends on local rules and is not promised.

Everything else runs on one prepaid USD wallet. Top-ups by card or USDT/USDC each produce a PDF invoice by email, and the pricing page explains the pay-as-you-go model.

Frequently asked questions

Can I test my app's Cayman Islands sign-up flow without a local SIM?

Yes. Order a +1 345 number through the OTP Gateway, enter it in your app, and read the code in the dashboard or through the API. You pay from $0.20 per code and only when the code arrives.

What country id does the API use for the Cayman Islands?

The id is ky. Pass it as the country value when you call GET /api/v1/prices or POST /api/v1/activations.

How should I store a Cayman phone number in my database?

Store it in E.164 form: +1345 followed by the seven-digit subscriber number, with no spaces or punctuation. Detect the territory from the 345 area code, not from the +1 prefix.

Does a +1 345 number count as a US number for Dedicated Numbers?

No. Dedicated Numbers are sold only for the United States and Canada, so a Cayman line is available solely as a one-code OTP Gateway activation.

What happens to my money if the SMS never shows up?

The activation stays open for 20 minutes. If no code arrives in that time, or you cancel first, the full amount is returned to your wallet automatically.

Can I run Cayman OTP tests in CI without spending wallet funds?

Ask support to move a development account to sandbox. It returns simulated numbers and codes, so your pipeline can exercise the full activation and webhook flow at no cost.

How many Cayman services does OTP Route cover?

More than 600 at the time of the latest snapshot. Because inventory shifts through the day, query GET /api/v1/services and the prices endpoint for live availability.

Service names are trademarks of their respective owners. OTP Route is not affiliated with them. Use numbers lawfully, follow each service's terms and our Acceptable Use Policy.