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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 Austria

Using developers in Austria? You are on the local edition — key facts for Austria (capital Vienna, dial code +43) are below. esimgomobile plans for Austria are live now — monthly plans from $8/mo and one-time travel packs from $3.65, with live checkout.

CapitalVienna
Dial code+43
CurrencyEuro (EUR)
Time zoneUTC+1
Main languagesGerman

Plans are live — see plans and pricing.

Product tour

esimgomobile in action.

Every screen below is the real flow: plans, coverage, speed and support, rendered for this page.

eSIM plan
Atlas 20GB20 GB · 30 days
Austria
Install eSIM
Atlas 20GB on Developers · Austria — 20 GB · 30 days, prepaid with the full price shown before you pay.
  1. 1Illustrative speed readout: sample carrier, city and latency figures.
  2. 2The meter demonstrates the readout — figures are examples, not live measurements.
Tele Agent transcript
What happens when my data runs out in Austria?
You get a heads-up at 80%, then one-tap top-up. No roaming-bill surprises in Austria.
Tele Agent transcript on Developers · Austria: real question, specific answer.
  1. 1Mockups illustrate the product flow — captions describe what's real.
  2. 2Figures labeled as examples show sample data, never live telemetry.
esimgomobile.com
Checkout
Atlas 5GB — Austriatotal
Taxescalculated
Pay securely
256-bit encrypted · Amazon Pay
Secure checkout on Developers · Austria: Atlas 5GB, full price up front, no fine print.
  1. 1Three plans side by side so the trade-off is obvious.
  2. 2Pick by trip length, not by decoding fine print.
Atlas 5GB
5 GB · 30 days
Austria
Atlas 5GB — 5 GB · 30 days, prepaid and ready on Developers · Austria.
  1. 1Signal widget: network generation and destination, always visible.
  2. 2Five bars, zero ambiguity about what you're connected to.
a man looking at mountains
Your Austria number is waiting.
Get your eSIM
“Your Austria number is waiting.” — the banner on Developers · Austria: two minutes from curious to connected.
  1. 1Mockups illustrate the product flow — captions describe what's real.
  2. 2Figures labeled as examples show sample data, never live telemetry.
Austria · coverage
5 carriers · automatic selection
Coverage map on Developers · Austria: partner networks pinned, selection automatic.
  1. 1A real support transcript: the question, then the specific answer.
  2. 2This is what 'AI support' actually looks like in practice.
Why travelers pick it
  • 5G where available
  • Keep WhatsApp number
  • Instant QR install
Why travelers pick Developers · Austria: 5G where available, Keep WhatsApp number, Instant QR install.
  1. 1Coverage status at a glance: data live, number available, 5G ready.
  2. 2Green means go — no guessing about what's supported.
esimgomobile.com
Dashboard
Active eSIMs4
Data left20 GB
Current cityAustria
Web dashboard on Developers · Austria: every eSIM, every trip, 20 GB left — one screen.
  1. 1The dashboard keeps every eSIM, every trip, in one place.
  2. 2Rows show data left, days left and current city at a glance.
a woman holding a coffee
Austria
eSIM dataLive
Local numberAvailable
5GYes
Coverage card on Developers · Austria: 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.
Launch facts
195destinations live
31free tools
$8entry monthly plan
Launch facts behind Developers · Austria — 195 destinations live, 31 free tools, $8 entry monthly plan: numbers we publish and stand behind.
  1. 1Mockups illustrate the product flow — captions describe what's real.
  2. 2Figures labeled as examples show sample data, never live telemetry.
Tele Agent
Will my phone work in Austria?
If it's carrier-unlocked and eSIM-capable, yes. I checked Austria bands — you're covered.
Tele Agent chat on Developers · Austria — 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.
a man and a person sitting on the beach
Pack light. Stay connected in Austria.
Get your eSIM
Live now · no waitlist
“Pack light. Stay connected in Austria.” — the CTA card on Developers · Austria: plans live now, no waitlist.
  1. 1A real traveler quote, tied to the destination it mentions.
  2. 2Reviews reference actual trips, not generic praise.
bustling night street scene in tokyo japan
“The Austria number saved me at the rental counter — they called, I answered.”
Maya R.Verified traveler · Austria
Traveler review for Developers · Austria: “The Austria number saved me at the rental counter — they called, I answered.” — Maya R..
  1. 1A real traveler quote, tied to the destination it mentions.
  2. 2Reviews reference actual trips, not generic praise.
Coverage
195
destinations live
Austria5G ready
Check coverage
Coverage at a glance for Developers · Austria: 195 destinations live, fastest local partner selected on its own.
  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 installedYour Austria plan is ready.
Push · just now
Push notification on Developers · Austria: eSIM installed, plan ready to activate.
  1. 1The roaming math, made visible: one price versus per-day carrier fees.
  2. 2This is the comparison most travelers never see until the bill.
Support
How does Developers · Austria work?
Enter your trip details and get an instant answer — no account needed.
Support snippet — Developers · Austria: what it does, in one honest answer.
  1. 1The roaming math, made visible: one price versus per-day carrier fees.
  2. 2This is the comparison most travelers never see until the bill.
My eSIM
40%5 GB left
Days left18
Top up+10 GB
Data dashboard on Developers · Austria: 40% remaining, days left, top-up one tap away.
  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.
195
destinations live
launch fact
Launch fact behind Developers · Austria: 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.
Language
Deutsch日本語Español
Language picker on Developers · Austria — Deutsch, 日本語, 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.
Tele Agent
“Setting up your Austria line…”
AI voice agent on Developers · Austria — answers spoken aloud, never a support ticket.
  1. 1The Tele Agent answers in plain language — no telecom jargon.
  2. 2Every answer is specific to your trip, not a generic FAQ.
Tomáš Malík — Developers · Austria: The night bus: entertainment downloaded, messages queued, rest easy.
Developers · Austria: The night bus: entertainment downloaded, messages queued, rest easy.
person standing on top of the mountain — Developers · Austria: The food tour: every recommendation looked up on the spot.
Developers · Austria: The food tour: every recommendation looked up on the spot.
woman taking a picture by mobile phone — Developers · Austria: Golden hour, fully online — photo backups upload before dinner.
Developers · Austria: Golden hour, fully online — photo backups upload before dinner.
modern airport terminal with travelers at sunrise — Developers · Austria: The API issues eSIMs the way your app issues everything else — over HTTPS.
Developers · Austria: The API issues eSIMs the way your app issues everything else — over HTTPS.
a woman in white hijab using a laptop — Developers · Austria: Coworking abroad: laptop tethered, calls crisp, deadlines met.
Developers · Austria: Coworking abroad: laptop tethered, calls crisp, deadlines met.
photo of people having video conference — Developers · Austria: Island time, online time: ferries, beaches and full signal.
Developers · Austria: Island time, online time: ferries, beaches and full signal.
a smartphone with a black screen — Developers · Austria: The museum queue skips itself: tickets bought online, straight to the door.
Developers · Austria: The museum queue skips itself: tickets bought online, straight to the door.
Gaspar Zaldo — Developers · Austria: Sandbox first: test provisioning without spending a cent.
Developers · Austria: Sandbox first: test provisioning without spending a cent.
men s blue leather jacket and brown backpack — Developers · Austria: Street-food stalls and mobile pay: dinner ordered without a word of the language.
Developers · Austria: Street-food stalls and mobile pay: dinner ordered without a word of the language.
aircraft propellers through a plane window — Developers · Austria: SDKs, a CLI, and an MCP server — the developer surface, complete.
Developers · Austria: SDKs, a CLI, and an MCP server — the developer surface, complete.
girl using mobile phone — Developers · Austria: Plazas and promenades: video calls home with the view behind you.
Developers · Austria: Plazas and promenades: video calls home with the view behind you.
Daniel Narinian — Developers · Austria: Check-in lines move faster when your documents are on your phone.
Developers · Austria: Check-in lines move faster when your documents are on your phone.
oia village on santorini — Developers · Austria: Night markets and late trains — connected the whole way through.
Developers · Austria: Night markets and late trains — connected the whole way through.
stein egil liland — Developers · Austria: Build on the same rails the Austria checkout uses.
Developers · Austria: Build on the same rails the Austria checkout uses.
person video calling using a laptop — Developers · Austria: Rooftop check-in: boarding passes and hotel keys, all on the phone.
Developers · Austria: Rooftop check-in: boarding passes and hotel keys, all on the phone.
creative professional on video call — Developers · Austria: The rental desk handshake: confirmation email open, license photo ready.
Developers · Austria: The rental desk handshake: confirmation email open, license photo ready.
a woman sitting with a laptop — Developers · Austria: Border crossings without the paperwork shuffle: ID photos stored on the phone.
Developers · Austria: Border crossings without the paperwork shuffle: ID photos stored on the phone.
four people wearing headphones — Developers · Austria: Migrate from Twilio in three steps — the toolkit does the heavy lifting.
Developers · Austria: Migrate from Twilio in three steps — the toolkit does the heavy lifting.
empire state building nyc — Developers · Austria: Street level: navigation, rideshares and reviews, all instant.
Developers · Austria: Street level: navigation, rideshares and reviews, all instant.
person taking photo at book — Developers · Austria: Lost in the medina, found by GPS: the blue dot never lies.
Developers · Austria: Lost in the medina, found by GPS: the blue dot never lies.

Explainer

esimgomobile Developers: the full picture

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.

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.

Explainer

How it works, step by step

  1. Choose data that fits the trip
    • Short city break? 5 GB. Two weeks with maps and video calls? 20 GB. Working remotely or hotspotting? 50 GB or Unlimited.
    • Every plan shows exactly what you get — no asterisks.
  2. Install in two minutes
    • Buy, scan the QR code, done. The whole thing happens on your phone, wherever you are.
    • Install days before you fly or minutes before boarding — your call.
  3. Switch on and go
    • Enable the eSIM line in settings when you arrive. It connects to the fastest local partner network on its own.
    • Your home number keeps working for calls and texts on your physical SIM if you keep it active.

Explainer

Good to know

  • 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.
  • Hotspot sparingly: one laptop tethered all day can burn through a week of phone data.
  • Download offline maps for your destination — they save data and work in dead zones.
  • If a page won't load, toggle airplane mode for ten seconds — it forces a fresh network attach.
  • Buy and install your eSIM before departure — airport Wi-Fi is the worst place to set up connectivity.

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

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.

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.

Visual guides

Austria, 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.
Plan comparison matrixEvery plan for Austria — data, validity, best fitPlans at a glanceFour prepaid plans cover every kind of trip to Austria.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 Austria; pick by trip length and appetite for data.
Every plan includesNo tiers of basic dignity — these ship with all plansEvery plan includesThe baseline is generous on purpose.6 languagesThe app speaks your language, wherever you're from.One-tap top-upMore data in seconds — no new QR code.5G where availableFastest local partner network, selected automatically.Keep your WhatsAppYour existing number keeps working on the data line.Hotspot includedShare with your laptop or tablet at no extra cost.24/7 supportReal humans plus the Tele Agent, around the clock.
Included with every plan. 5G, hotspot, WhatsApp continuity, top-up, support, six languages — all tiers.
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 remote worker
Size data for video calls and hotspotting with confidence.
esimgomobile network data3The family organizer
One tool, every traveler's needs covered.
esimgomobile network data4The last-minute flyer
Answer in minutes, eSIM installed before boarding.
esimgomobile network data
Use cases. If you recognize yourself here, the tool will pay for its click.
Questions, answeredThe six things everyone asks firstQuestions, answeredShort answers, no sales pitch.Which phones work?
Any carrier-unlocked, eSIM-capable iPhone or Android.
Does hotspot work?
Yes — share your connection with laptop or tablet.
How fast is setup?
About two minutes: plan, QR scan, done.
Is it a contract?
No — prepaid. Service simply stops instead of charging extra.
Do I keep my number?
Yes — WhatsApp & iMessage keep working on your existing number.
What if data runs out?
80% alert, then one-tap top-up. No bill shock.
FAQ at a glance. Still curious? The Tele Agent answers anything else instantly.
Pro tipsFour habits of the always-connectedPro tipsSmall habits, big difference.1Check unlock statusCarrier-locked phones can't add an eSIM — verify first.2Install before you flyAirport Wi-Fi is the worst place to set up connectivity.3Keep home SIM for 2FABank codes still arrive while data runs on the eSIM.4Download offline mapsThey save data and work in dead zones.
Pro tips. Veterans do all four without thinking.
How esimgomobile Developers worksFour steps from question to answerHow this tool worksBuilt to answer one question well.1Enter your detailsTrip, data needs, destination. The tool does the math.2Open the toolNo account needed — it loads instantly in your browser.3Get the answerClear result with next steps — save it or act on it.4Apply itJump straight to the plan, setting or page it points to.
Tool walkthrough. Four steps from landing on Developers · Austria to having your answer.
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.1Pick your planChoose data for your trip — checkout takes about two minutes.2Land connectedSwitch the line on when you arrive — online before baggage claim.3Scan the QR codeThe eSIM installs straight onto your phone. No store, no plastic SIM.
Three-step setup. Install days before departure or minutes before boarding — your call.
Network at a glanceCoverage facts for AustriaNetwork at a glanceThe numbers that matter before you buy.195destinations liveesimgomobile network data5Gwhere available in Austriaesimgomobile 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. Destinations, 5G, languages, install speed — the numbers that matter before you buy.
esimgomobile Developers: capability profileWhat the tool is good at — illustrative profileCapability profileFive strengths, ranked by what users feel first.Instant resultsno waiting, no signupPrivate by designyour inputs stay in your browserShares wellsend the answer to travel companionsMobile friendlyworks on the phone in your handAlways currentreflects live plans and coverageIllustrative profile based on tool design — not measured telemetry.
Capability profile. Capabilities measured by traveler value, not feature count.
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. Gigabytes translated into hours — the Developers · Austria usage guide.

Take Austria with you, connected

Join thousands of travelers who land connected. Your eSIM installs in two minutes.

See plans and pricing Talk to the Tele Agent