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Live now

API-first, down to the SIM.

Everything the dashboard does is an API call: buy data, provision eSIMs, rent numbers, send SMS, configure Tele Agent. Built for human developers — and for autonomous AI agents.

Live today

The developer platform is already open.

No sales call, no human-gated first project: sign in and mint your own API keys. The product endpoints (catalog, checkout, numbers, Tele Agent) are live — everything below works right now.

Self-serve API keys

Sign in with Firebase and mint esk_live_… keys instantly — scoped to a project (production, test, experiment), hash-stored, revocable in one call.

# mint a key
curl -X POST \
  https://api.esimgomobile.com/api/v1/keys \
  -H "Authorization: Bearer $FIREBASE_ID_TOKEN" \
  -H "Content-Type: application/json" \
  -d '{"name":"ci","project":"test"}'

Webhooks: com.esimgomobile.*

HTTPS endpoints, per-endpoint HMAC-SHA256 signatures (Stripe-style t=…,v1=…), at-least-once delivery with backoff, dead-lettering and replay. Billing, number provisioning, porting, calls, SMS, key and KYC events.

Number porting API

draft → information_required → pending → completed. The API tells you exactly which fields each country needs before you submit — submission is fail-closed until carrier onboarding completes.

KYC intake

Collect the identity documents carriers require per country. Verification stays honestly pending_verification until a verification vendor is configured — never a fake "verified".

Honest status page

Component states derived live from service configuration — never fabricated uptime percentages.

esimgomobile.com/status/ →

REST API

The v1 API contract — live now.

The product contract below is final for v1 and live on the platform. Authenticate with a bearer API key; every response is JSON.

MethodEndpointWhat it does
GET/api/catalogList live eSIM plans (country, data, validity, price)
POST/api/checkoutCreate a checkout session for a plan → returns payment URL
GET/api/accountOrders, lines, numbers and Tele Agent status
GET/api/qr?order_id=…Fetch or re-issue the eSIM QR / activation code
GET/api/balance?profile_id=…Live remaining data for an eSIM line
GET/api/numbers?country=…Search available virtual numbers
POST/api/numbers/purchaseRent a virtual number (monthly)
POST/api/teleagent/signupAttach Tele Agent to a number with business config
# list live eSIM plans
curl https://esimgomobile.com/api/catalog \
  -H "Authorization: Bearer $ESIM_API_KEY"

# → { "plans": [ { "id": "esim-jp-10gb-30d", "country": "Japan",
#     "data_gb": 10, "validity_days": 30, "price_usd": 24.9, ... } ] }

# check data balance on a line
curl "https://esimgomobile.com/api/balance?profile_id=prof_abc" \
  -H "Authorization: Bearer $ESIM_API_KEY"

# → { "profile_id": "prof_abc", "remaining_mb": 6240,
#     "total_mb": 10240, "percent": 61 }
Developer surface

Four ways to build.

SDKs

Live: idiomatic JavaScript and Python clients covering every live route — keys, webhooks, porting, KYC, status. Tested, versioned, on GitHub.

Status: live

CLI

Live: the esim CLI scripts everything from the terminal — esim keys issue, esim webhooks register, esim portings create, esim kyc verify. Made for automation and agents.

Status: live

MCP server

A Model Context Protocol server exposing the whole platform to AI agents — buy data, provision lines, manage numbers and Tele Agent from any MCP client. Already powering our ChatGPT app; the same server ships for Claude and other agents.

Status: in progress

Migrate from Twilio in three steps

Bring your Twilio voice/SMS app to esimgomobile without rewriting it: port your numbers, point your webhooks at our compatible endpoints, verify with a test call. A guided toolkit walks the whole move — numbers, messaging and Tele Agent included.

Status: live
Get building

Developer keys are live today.

Sign in, mint an esk_live_… key and start building against the live developer platform — webhooks, porting, KYC and status included.

Read the OpenAPI doc

esimgomobile in Barbados

Using developers in Barbados? You are on the local edition — key facts for Barbados (capital Bridgetown, dial code +1-246) are below. esimgomobile plans for Barbados are live now — monthly plans from $8/mo and one-time travel packs from $3.65, with live checkout.

CapitalBridgetown
Dial code+1-246
CurrencyBarbadian dollar (BBD)
Time zoneUTC-4
Main languagesEnglish

Plans are live — see plans and pricing.

Product tour

Take the tour.

Twenty product screens and twenty field photos — this is what traveling connected looks like.

Atlas 20GB
20 GB · 30 days
Barbados
Atlas 20GB — 20 GB · 30 days, prepaid and ready on Developers · Barbados.
  1. 1Usage ring compresses the whole plan into one glanceable number.
  2. 2Percent remaining is the only metric most travelers check.
esimgomobile.com
group of friends enjoying the beach in pangandaran
esimgomobile Developers
Travel guides · 8 min read
From the blog: “esimgomobile Developers” — travel guides in about eight minutes.
  1. 1The dashboard keeps every eSIM, every trip, in one place.
  2. 2Rows show data left, days left and current city at a glance.
Tele Agent
“Setting up your Barbados line…”
AI voice agent on Developers · Barbados — answers spoken aloud, never a support ticket.
  1. 1Live usage ring: see remaining data at a glance, no mental math.
  2. 2Top-up button sits right where you need it when data runs low.
eSIM plan
Atlas 20GB20 GB · 30 days
Barbados
Install eSIM
Atlas 20GB on Developers · Barbados — 20 GB · 30 days, prepaid with the full price shown before you pay.
  1. 1The Tele Agent answers in plain language — no telecom jargon.
  2. 2Every answer is specific to your trip, not a generic FAQ.
esimgomobile.com
Dashboard
Active eSIMs1
Data left10 GB
Current cityBarbados
Web dashboard on Developers · Barbados: every eSIM, every trip, 10 GB left — one screen.
  1. 1Checkout shows the full price before you pay. Nothing hidden.
  2. 2Amazon Pay handles payment securely; taxes are calculated for you.
Support
How does Developers · Barbados work?
Enter your trip details and get an instant answer — no account needed.
Support snippet — Developers · Barbados: what it does, in one honest answer.
  1. 1A real traveler quote, tied to the destination it mentions.
  2. 2Reviews reference actual trips, not generic praise.
Launch facts
195destinations live
31free tools
$8entry monthly plan
Launch facts behind Developers · Barbados — 195 destinations live, 31 free tools, $8 entry monthly plan: numbers we publish and stand behind.
  1. 1Coverage pins show where partner networks are live.
  2. 2The map answers the only question that matters: will it work there?
Language
日本語FrançaisEspañol
Language picker on Developers · Barbados — 日本語, Français, Español: the app speaks six languages.
  1. 1Signal widget: network generation and destination, always visible.
  2. 2Five bars, zero ambiguity about what you're connected to.
esimgomobile.com
API quickstart
curl https://api.esimgomobile.com/v1/esims \
  -H "Authorization: Bearer $KEY" \
  -d '{"country":"BA"}'
200 OK · 132 ms
REST API behind Developers · Barbados: issue eSIMs programmatically — 200 OK in milliseconds.
  1. 1Checkout shows the full price before you pay. Nothing hidden.
  2. 2Amazon Pay handles payment securely; taxes are calculated for you.
My eSIM
37%5 GB left
Days left22
Top up+10 GB
Data dashboard on Developers · Barbados: 37% remaining, days left, top-up one tap away.
  1. 1Illustrative speed readout: sample carrier, city and latency figures.
  2. 2The meter demonstrates the readout — figures are examples, not live measurements.
esimgomobile.com
Checkout
Atlas 50GB — Barbadostotal
Taxescalculated
Pay securely
256-bit encrypted · Amazon Pay
Secure checkout on Developers · Barbados: Atlas 50GB, full price up front, no fine print.
  1. 1Checkout shows the full price before you pay. Nothing hidden.
  2. 2Amazon Pay handles payment securely; taxes are calculated for you.
Install
1 Scan2 Add3 Go
The Developers · Barbados install: QR in three steps — scan, add, go, about two minutes.
  1. 1Illustrative speed readout: sample carrier, city and latency figures.
  2. 2The meter demonstrates the readout — figures are examples, not live measurements.
women wearing bikinis sitting on sand on the beach
Barbados
eSIM dataLive
Local numberAvailable
5GYes
Coverage card on Developers · Barbados: data live, local number available, 5G where it exists.
  1. 1Coverage status at a glance: data live, number available, 5G ready.
  2. 2Green means go — no guessing about what's supported.
esimgomobile.com
Plans for Barbados
Atlas 5GB5 GB · 30 days
Atlas 20GB20 GB · 30 days
Atlas 50GB50 GB · 60 days
Compare plans
Plan picker on Developers · Barbados: 5GB, 20GB, 50GB and Unlimited — pick by trip, not fine print.
  1. 1Checkout shows the full price before you pay. Nothing hidden.
  2. 2Amazon Pay handles payment securely; taxes are calculated for you.
195
destinations live
launch fact
Launch fact behind Developers · Barbados: 195 destinations live — a fixed figure, not live telemetry.
  1. 1Coverage status at a glance: data live, number available, 5G ready.
  2. 2Green means go — no guessing about what's supported.
Virtual number
+1 205 386 8830
Routes toBarbados
SMS + voiceEnabled
Your second line on Developers · Barbados: +1 205 386 8830 — real number, SMS and voice enabled.
  1. 1Coverage status at a glance: data live, number available, 5G ready.
  2. 2Green means go — no guessing about what's supported.
Why travelers pick it
  • Keep WhatsApp number
  • One-tap top-up
  • Instant QR install
Why travelers pick Developers · Barbados: Keep WhatsApp number, One-tap top-up, Instant QR install.
  1. 1A real traveler quote, tied to the destination it mentions.
  2. 2Reviews reference actual trips, not generic praise.
Speed test
491Mbps
5G · Barbados · 27 ms
Illustrative speed readout on Developers · Barbados: 491 Mbps, 27 ms — example figures, not live measurements.
  1. 1Live usage ring: see remaining data at a glance, no mental math.
  2. 2Top-up button sits right where you need it when data runs low.
Tele Agent
Can I keep my WhatsApp number?
Yes — your eSIM is data-first, so WhatsApp keeps working on your existing number in Barbados.
Tele Agent chat on Developers · Barbados — real questions, specific answers, zero telecom jargon.
  1. 1Illustrative speed readout: sample carrier, city and latency figures.
  2. 2The meter demonstrates the readout — figures are examples, not live measurements.
49%
data left
Usage ring on Developers · Barbados — 49% of data left: the number travelers check most.
  1. 1Usage ring compresses the whole plan into one glanceable number.
  2. 2Percent remaining is the only metric most travelers check.
Hub JACQU — Developers · Barbados: The docs ship with runnable examples, not pseudocode.
Developers · Barbados: The docs ship with runnable examples, not pseudocode.
Alexey Chudin — Developers · Barbados: The rental desk handshake: confirmation email open, license photo ready.
Developers · Barbados: The rental desk handshake: confirmation email open, license photo ready.
man hiking in snow in mountains — Developers · Barbados: The departure board flips: gate found, lounge located, all on the eSIM.
Developers · Barbados: The departure board flips: gate found, lounge located, all on the eSIM.
new york city — Developers · Barbados: Border crossings without the paperwork shuffle: ID photos stored on the phone.
Developers · Barbados: Border crossings without the paperwork shuffle: ID photos stored on the phone.
aircraft propellers through a plane window — Developers · Barbados: Coworking abroad: laptop tethered, calls crisp, deadlines met.
Developers · Barbados: Coworking abroad: laptop tethered, calls crisp, deadlines met.
Kyle Karbowski — Developers · Barbados: The sunrise ferry: tickets in the wallet app, timetable cached offline.
Developers · Barbados: The sunrise ferry: tickets in the wallet app, timetable cached offline.
a man using laptop — Developers · Barbados: Family group chat: location shared, dinner plans settled in minutes.
Developers · Barbados: Family group chat: location shared, dinner plans settled in minutes.
woman hiking on hill — Developers · Barbados: The night bus: entertainment downloaded, messages queued, rest easy.
Developers · Barbados: The night bus: entertainment downloaded, messages queued, rest easy.
manhattan cityscape with skyscrapers — Developers · Barbados: Sunrise hikes start with a weather check — data on, boots on.
Developers · Barbados: Sunrise hikes start with a weather check — data on, boots on.
a man looking at mountains — Developers · Barbados: The status page is public — uptime you can verify, not claim.
Developers · Barbados: The status page is public — uptime you can verify, not claim.
men with backpacks walking on the beach — Developers · Barbados: Currency exchange, skipped: the phone pays at the real rate.
Developers · Barbados: Currency exchange, skipped: the phone pays at the real rate.
man in white dress shirt using a laptop — Developers · Barbados: From departure lounge to arrival hall, the data never drops.
Developers · Barbados: From departure lounge to arrival hall, the data never drops.
group of people using laptop computer — Developers · Barbados: Webhooks tell you when data runs low, plans expire, top-ups land.
Developers · Barbados: Webhooks tell you when data runs low, plans expire, top-ups land.
landscape view of greece during day time — Developers · Barbados: The long layover: streaming, working and messaging, all covered.
Developers · Barbados: The long layover: streaming, working and messaging, all covered.
Franco Monsalvo — Developers · Barbados: Sandbox first: test provisioning without spending a cent.
Developers · Barbados: Sandbox first: test provisioning without spending a cent.
close up of man working on laptop — Developers · Barbados: The API issues eSIMs the way your app issues everything else — over HTTPS.
Developers · Barbados: The API issues eSIMs the way your app issues everything else — over HTTPS.
friends jumping together on a beach — Developers · Barbados: Café office: hotspot running, video call stable, no hotel Wi-Fi roulette.
Developers · Barbados: Café office: hotspot running, video call stable, no hotel Wi-Fi roulette.
Gaspar Zaldo — Developers · Barbados: API keys rotate in one click — the dashboard makes it boring.
Developers · Barbados: API keys rotate in one click — the dashboard makes it boring.
green cactus plant near white concrete wall — Developers · Barbados: The welcome home: eSIM deleted in one tap, no contract to cancel.
Developers · Barbados: The welcome home: eSIM deleted in one tap, no contract to cancel.
Hb zee — Developers · Barbados: The red-eye recovery: hotel early-check-in arranged mid-flight.
Developers · Barbados: The red-eye recovery: hotel early-check-in arranged mid-flight.

Explainer

esimgomobile Developers: the full picture

Everything on this page exists to answer one question well: how does esimgomobile fit into your trip? The sections below go deep so you never need a second tab.

The short version: prepaid travel eSIMs across 195 destinations, installed by QR code in two minutes, managed from a dashboard, with an AI agent on call when you need a human-style answer fast.

The long version is the rest of this page — plans, mechanics, edge cases and honest trade-offs, written the way we'd explain it to a friend.

Explainer

How it works, step by step

  1. Buy before you fly
    • Order from home, the hotel, or the departure lounge — delivery is instant and digital.
    • No shipping, no pickup counters, no airport SIM queues.
  2. Add the eSIM
    • One QR scan adds the plan to your phone. iPhone and Android both walk you through it in under a minute.
    • You can install now and activate later — the plan starts when you choose.
  3. Stay online abroad
    • Data, maps, translation and messaging work the moment you land.
    • Running low? Top up in one tap from your dashboard — no new QR code needed.

Explainer

Good to know

  • If a page won't load, toggle airplane mode for ten seconds — it forces a fresh network attach.
  • Charge your phone before long travel days; weak signal areas drain batteries faster.
  • Set a data alert at 80% so a top-up never surprises you mid-trip.
  • Save your eSIM QR code somewhere safe (email it to yourself) in case you switch phones mid-trip.
  • Keep your home SIM active for two-factor codes from your bank; run data on the eSIM line.
  • Screenshot your hotel address and booking confirmations — you'll want them with no signal.

These are the details that separate a smooth trip from a stressful one — small, unglamorous, and worth more than any feature list.

Explainer

Why travelers switch

The Tele Agent closes the remaining gap: a question at midnight in a foreign terminal gets an answer in seconds, not a support ticket.

Roaming bills taught a generation to fear their phones abroad. The eSIM generation simply never learned that fear — data is prepaid, visible and finite.

And because everything is prepaid through Amazon Pay, the commercial relationship is simple: you pay for data, you get data, it ends when it ends.

Charts & explainers

Barbados, visualized.

esimgomobile Developers — data dashboard

The product's headline numbers, switchable by dataset.

195
destinations live
global footprint
4
Atlas plans
prepaid, no contracts
~2 min
typical install
QR scan to online
6
app languages
EN ES FR DE PT JA
Atlas 5GB: 5 GB over 30 days — Weekend breaks & light useAtlas 5GB 5 GBAtlas 20GB: 20 GB over 30 days — Two-week trips & daily useAtlas 20GB 20 GBAtlas 50GB: 50 GB over 60 days — Remote work & hotspottingAtlas 50GB 50 GBAtlas Unlimited: Unlimited over 30 days — Heavy use, zero meteringAtlas Unlimited Unlimited
Atlas 5GB: 30-day validityAtlas 5GB 30 daysAtlas 20GB: 30-day validityAtlas 20GB 30 daysAtlas 50GB: 60-day validityAtlas 50GB 60 daysAtlas Unlimited: 30-day validityAtlas Unlimited 30 days
Illustrative — D1: 100% of maxIllustrative — D10: 70% of maxIllustrative — D20: 42% of maxIllustrative — D30: 12% of maxDay 1Day 10Day 20Day 30IllustrativeIllustrative 20 GB burn-down at moderate use.

Hover any bar or point for its exact value. Tabs switch datasets — everything on this panel is computed from live product data unless labeled illustrative.

esimgomobile Developers — data dashboard. Plan allowances, validity windows and a typical usage curve for esimgomobile Developers — hover for exact values.
Network at a glanceCoverage facts for BarbadosNetwork at a glanceThe numbers that matter before you buy.195destinations liveesimgomobile network data5Gwhere available in Barbadosesimgomobile network data6app languagesesimgomobile network data2 mintypical install timeesimgomobile network dataPlus: local numbers where available, hotspot included, 24/7 support.Prepaid only — when the plan ends, it simply stops. No contracts.
Coverage facts. Barbados connects to the fastest available local partner network automatically.
Get connected in three stepsFrom purchase to online in about two minutesGet connected in three stepsNo store visit, no plastic SIM, no waiting for the post.1Land connectedSwitch the line on when you arrive — online before baggage claim.2Pick your planChoose data for your trip — checkout takes about two minutes.3Scan the QR codeThe eSIM installs straight onto your phone. No store, no plastic SIM.
Three-step setup. Buy, scan, land: the whole sequence fits in a coffee queue.
Who it's forFour travelers, one toolWho it's forBuilt for real trip shapes, not personas.1The planner
Compare before you commit — know the right plan weeks ahead.
esimgomobile network data2The last-minute flyer
Answer in minutes, eSIM installed before boarding.
esimgomobile network data3The remote worker
Size data for video calls and hotspotting with confidence.
esimgomobile network data4The family organizer
One tool, every traveler's needs covered.
esimgomobile network data
Use cases. Planners, sprinters, remote workers, families — who's it for.
Every plan includesNo tiers of basic dignity — these ship with all plansEvery plan includesThe baseline is generous on purpose.One-tap top-upMore data in seconds — no new QR code.5G where availableFastest local partner network, selected automatically.24/7 supportReal humans plus the Tele Agent, around the clock.Keep your WhatsAppYour existing number keeps working on the data line.6 languagesThe app speaks your language, wherever you're from.Hotspot includedShare with your laptop or tablet at no extra cost.
Included with every plan. From 5 GB to Unlimited, the inclusions don't shrink.
Plan comparison matrixEvery plan for Barbados — data, validity, best fitPlans at a glanceFour prepaid plans cover every kind of trip to Barbados.PLANDATAVALIDITYAtlas 5GBWeekend breaks & light use5 GB30 daysAtlas 20GBTwo-week trips & daily use20 GB30 daysAtlas 50GBRemote work & hotspotting50 GB60 daysAtlas UnlimitedHeavy use, zero meteringUnlimited30 days
Plan comparison matrix. All four Atlas plans work in Barbados; pick by trip length and appetite for data.
Pro tipsFour habits of the always-connectedPro tipsSmall habits, big difference.1Check unlock statusCarrier-locked phones can't add an eSIM — verify first.2Keep home SIM for 2FABank codes still arrive while data runs on the eSIM.3Set an 80% alertA top-up should never surprise you mid-trip.4Install before you flyAirport Wi-Fi is the worst place to set up connectivity.
Pro tips. Veterans do all four without thinking.
esimgomobile Developers: capability profileWhat the tool is good at — illustrative profileCapability profileFive strengths, ranked by what users feel first.Instant resultsno waiting, no signupAlways currentreflects live plans and coverageShares wellsend the answer to travel companionsMobile friendlyworks on the phone in your handPrivate by designyour inputs stay in your browserIllustrative profile based on tool design — not measured telemetry.
Capability profile. Capabilities measured by traveler value, not feature count.
How esimgomobile Developers worksFour steps from question to answerHow this tool worksBuilt to answer one question well.1Get the answerClear result with next steps — save it or act on it.2Open the toolNo account needed — it loads instantly in your browser.3Apply itJump straight to the plan, setting or page it points to.4Enter your detailsTrip, data needs, destination. The tool does the math.
Tool walkthrough. Developers · Barbados, demystified: open, enter, answer, act.
Questions, answeredThe six things everyone asks firstQuestions, answeredShort answers, no sales pitch.What if data runs out?
80% alert, then one-tap top-up. No bill shock.
Which phones work?
Any carrier-unlocked, eSIM-capable iPhone or Android.
Do I keep my number?
Yes — WhatsApp & iMessage keep working on your existing number.
Is it a contract?
No — prepaid. Service simply stops instead of charging extra.
How fast is setup?
About two minutes: plan, QR scan, done.
Does hotspot work?
Yes — share your connection with laptop or tablet.
FAQ at a glance. Six questions every traveler asks — the Developers · Barbados answers, one screen.
What your gigabytes meanTypical hourly usage per activityWhat your gigabytes meanTranslate plan sizes into real travel behavior.Maps & navigation≈ 5 MB / hourMessaging & email≈ 20 MB / hourSocial browsing≈ 150 MB / hourVideo calls≈ 600 MB / hourHD streaming≈ 1.5 GB / hourTypical usage rates — actual consumption varies by app and quality settings.
Data usage guide. Maps sip, streaming gulps: size the plan to your heaviest habit.

Start your Barbados trip online

Prepaid, no contracts, no roaming surprises. The whole setup takes about two minutes.

See plans and pricing Talk to the Tele Agent