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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 Slovakia

Using developers in Slovakia? You are on the local edition — key facts for Slovakia (capital Bratislava, dial code +421) are below. esimgomobile plans for Slovakia are live now — monthly plans from $8/mo and one-time travel packs from $3.65, with live checkout.

CapitalBratislava
Dial code+421
CurrencyEuro (EUR)
Time zoneUTC+1
Main languagesSlovak

Plans are live — see plans and pricing.

Up close

esimgomobile in action.

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

195
destinations live
launch fact
Launch fact behind Developers · Slovakia: 195 destinations live — a fixed figure, not live telemetry.
  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.
esimgomobile.com
Dashboard
Active eSIMs2
Data left20 GB
Current citySlovakia
Web dashboard on Developers · Slovakia: every eSIM, every trip, 20 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.
Launch facts
195destinations live
31free tools
$8entry monthly plan
Launch facts behind Developers · Slovakia — 195 destinations live, 31 free tools, $8 entry monthly plan: numbers we publish and stand behind.
  1. 1A real support transcript: the question, then the specific answer.
  2. 2This is what 'AI support' actually looks like in practice.
Slovakia · 5G
Signal widget on Developers · Slovakia: network generation and place, always visible.
  1. 1Usage ring compresses the whole plan into one glanceable number.
  2. 2Percent remaining is the only metric most travelers check.
esimgomobile.com
Checkout
Atlas Unlimited — Slovakiatotal
Taxescalculated
Pay securely
256-bit encrypted · Amazon Pay
Secure checkout on Developers · Slovakia: Atlas Unlimited, 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.
esimgomobile.com
API quickstart
curl https://api.esimgomobile.com/v1/esims \
  -H "Authorization: Bearer $KEY" \
  -d '{"country":"SL"}'
200 OK · 180 ms
REST API behind Developers · Slovakia: issue eSIMs programmatically — 200 OK in milliseconds.
  1. 1The dashboard keeps every eSIM, every trip, in one place.
  2. 2Rows show data left, days left and current city at a glance.
esimgomobile.com
Dr.Ramsinh Jadav
esimgomobile Developers
Travel guides · 8 min read
From the blog: “esimgomobile Developers” — travel guides in about eight minutes.
  1. 1Three plans side by side so the trade-off is obvious.
  2. 2Pick by trip length, not by decoding fine print.
Tele Agent
“Setting up your Slovakia line…”
AI voice agent on Developers · Slovakia — answers spoken aloud, never a support ticket.
  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 Slovakia?
You get a heads-up at 80%, then one-tap top-up. No roaming-bill surprises in Slovakia.
Tele Agent transcript on Developers · Slovakia: real question, specific answer.
  1. 1A real support transcript: the question, then the specific answer.
  2. 2This is what 'AI support' actually looks like in practice.
eSIM installedYour Slovakia plan is ready.
Push · just now
Push notification on Developers · Slovakia: 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.
Language
PortuguêsDeutschEnglish
Language picker on Developers · Slovakia — Português, Deutsch, English: the app speaks six languages.
  1. 1The plan chip: name, allowance and destination in one line.
  2. 2Everything you need to confirm you're on the right plan.
My eSIM
74%5 GB left
Days left26
Top up+10 GB
Data dashboard on Developers · Slovakia: 74% remaining, days left, top-up one tap away.
  1. 1The Tele Agent answers in plain language — no telecom jargon.
  2. 2Every answer is specific to your trip, not a generic FAQ.
eSIM plan
Atlas 20GB20 GB · 30 days
Slovakia
Install eSIM
Atlas 20GB on Developers · Slovakia — 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.
white jet on black tarmac
Get connected
1 Pick a plan2 Scan QR3 Land online
Three steps on Developers · Slovakia: pick a plan, scan the QR, land online.
  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.
Slovakia · coverage
5 carriers · automatic selection
Coverage map on Developers · Slovakia: 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.
vs roaming
esimgomobile eSIMone price
Carrier roamingper-day fees
10 GB · 14 days · Slovakia
The honest comparison on Developers · Slovakia: one prepaid eSIM price versus carrier roaming.
  1. 1Coverage status at a glance: data live, number available, 5G ready.
  2. 2Green means go — no guessing about what's supported.
Sjuan Dogjani
Pack light. Stay connected in Slovakia.
Get your eSIM
Live now · no waitlist
“Pack light. Stay connected in Slovakia.” — the CTA card on Developers · Slovakia: plans live now, no waitlist.
  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.
Network
5G
Slovakia connected
Network widget for Developers · Slovakia: 5G, full bars — zero ambiguity about the connection.
  1. 1The Tele Agent answers in plain language — no telecom jargon.
  2. 2Every answer is specific to your trip, not a generic FAQ.
Support
How does Developers · Slovakia work?
Enter your trip details and get an instant answer — no account needed.
Support snippet — Developers · Slovakia: 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.
Tele Agent
How fast is the data in Slovakia?
Slovakia averages 5G in cities. Your plan connects to the fastest local network automatically.
Tele Agent chat on Developers · Slovakia — real questions, specific answers, zero telecom jargon.
  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.
man and woman video call on laptop — Developers · Slovakia: The food tour: every recommendation looked up on the spot.
Developers · Slovakia: The food tour: every recommendation looked up on the spot.
grayscale photo of people hiking on the mountain — Developers · Slovakia: API keys rotate in one click — the dashboard makes it boring.
Developers · Slovakia: API keys rotate in one click — the dashboard makes it boring.
the view of the ocean from the top of a hill — Developers · Slovakia: The rental desk handshake: confirmation email open, license photo ready.
Developers · Slovakia: The rental desk handshake: confirmation email open, license photo ready.
a greek flag is flying over the ocean — Developers · Slovakia: The conference badge: QR ticket scanned, session schedule synced.
Developers · Slovakia: The conference badge: QR ticket scanned, session schedule synced.
a man having a video call on his laptop — Developers · Slovakia: Rooftop check-in: boarding passes and hotel keys, all on the phone.
Developers · Slovakia: Rooftop check-in: boarding passes and hotel keys, all on the phone.
aerial view of airplane wing through window — Developers · Slovakia: Border crossings without the paperwork shuffle: ID photos stored on the phone.
Developers · Slovakia: Border crossings without the paperwork shuffle: ID photos stored on the phone.
business planning in office — Developers · Slovakia: The modern arrival: online before the seatbelt sign goes off.
Developers · Slovakia: The modern arrival: online before the seatbelt sign goes off.
A hand holding a smartphone capturing a bustling train station with blurred travelers in the background. — Developers · Slovakia: Street-food stalls and mobile pay: dinner ordered without a word of the language.
Developers · Slovakia: Street-food stalls and mobile pay: dinner ordered without a word of the language.
airplane wing and thick clouds — Developers · Slovakia: Migrate from Twilio in three steps — the toolkit does the heavy lifting.
Developers · Slovakia: Migrate from Twilio in three steps — the toolkit does the heavy lifting.
close up photo of headset on a laptop — Developers · Slovakia: The status page is public — uptime you can verify, not claim.
Developers · Slovakia: The status page is public — uptime you can verify, not claim.
Stan Versluis — Developers · Slovakia: Rain or shine, the connection holds — weather doesn't throttle data.
Developers · Slovakia: Rain or shine, the connection holds — weather doesn't throttle data.
Sahir Sujahudeen — Developers · Slovakia: The business trip: client deck synced, video call joined from the taxi.
Developers · Slovakia: The business trip: client deck synced, video call joined from the taxi.
man with coffee using laptop at cafe — Developers · Slovakia: Souvenir hunting with live currency conversion in your pocket.
Developers · Slovakia: Souvenir hunting with live currency conversion in your pocket.
a group of people chatting in a video call in a laptop — Developers · Slovakia: The sunrise ferry: tickets in the wallet app, timetable cached offline.
Developers · Slovakia: The sunrise ferry: tickets in the wallet app, timetable cached offline.
Matthew DeVries — Developers · Slovakia: The commute, handled: podcasts downloaded, messages sent, no dead zones.
Developers · Slovakia: The commute, handled: podcasts downloaded, messages sent, no dead zones.
quiet night street scene in tokyo japan — Developers · Slovakia: The departure board flips: gate found, lounge located, all on the eSIM.
Developers · Slovakia: The departure board flips: gate found, lounge located, all on the eSIM.
white and black electronic device — Developers · Slovakia: The docs ship with runnable examples, not pseudocode.
Developers · Slovakia: The docs ship with runnable examples, not pseudocode.
Roderick Salatan — Developers · Slovakia: Coast roads and country lanes — the map keeps up wherever you roam.
Developers · Slovakia: Coast roads and country lanes — the map keeps up wherever you roam.
pedestrians walk street in asian city at night — Developers · Slovakia: The connected trip: maps, messages and translation, all on one eSIM.
Developers · Slovakia: The connected trip: maps, messages and translation, all on one eSIM.
scenic view of santorini s iconic blue domes — Developers · Slovakia: Webhooks tell you when data runs low, plans expire, top-ups land.
Developers · Slovakia: Webhooks tell you when data runs low, plans expire, top-ups land.

Explainer

esimgomobile Developers: the full picture

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.

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 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. 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

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

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

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

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

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

The numbers behind Slovakia.

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 SlovakiaNetwork at a glanceThe numbers that matter before you buy.195destinations liveesimgomobile network data5Gwhere available in Slovakiaesimgomobile 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. Slovakia connects to the fastest available local partner network automatically.
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 coverageMobile friendlyworks on the phone in your handPrivate by designyour inputs stay in your browserShares wellsend the answer to travel companionsIllustrative profile based on tool design — not measured telemetry.
Capability profile. Ranked by what travelers notice first, not by marketing priority.
Plan comparison matrixEvery plan for Slovakia — data, validity, best fitPlans at a glanceFour prepaid plans cover every kind of trip to Slovakia.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. Weekend sips, fortnight data, work-month gulps, or unlimited — pick by trip shape.
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 family organizer
One tool, every traveler's needs covered.
esimgomobile network data3The remote worker
Size data for video calls and hotspotting with confidence.
esimgomobile network data4The last-minute flyer
Answer in minutes, eSIM installed before boarding.
esimgomobile network data
Use cases. Six traveler shapes, one tool — Developers · Slovakia's use cases.
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.3Enter your detailsTrip, data needs, destination. The tool does the math.4Apply itJump straight to the plan, setting or page it points to.
Tool walkthrough. Developers · Slovakia, demystified: open, enter, answer, act.
Pro tipsFour habits of the always-connectedPro tipsSmall habits, big difference.1Install before you flyAirport Wi-Fi is the worst place to set up connectivity.2Download offline mapsThey save data and work in dead zones.3Screenshot bookingsHotel address & confirmations, available with no signal.4Set an 80% alertA top-up should never surprise you mid-trip.
Pro tips. The small things that separate smooth trips from stressful ones.
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. A 20 GB plan covers roughly two weeks of normal travel use.
Every plan includesNo tiers of basic dignity — these ship with all plansEvery plan includesThe baseline is generous on purpose.Hotspot includedShare with your laptop or tablet at no extra cost.Keep your WhatsAppYour existing number keeps working on the data line.One-tap top-upMore data in seconds — no new QR code.6 languagesThe app speaks your language, wherever you're from.5G where availableFastest local partner network, selected automatically.24/7 supportReal humans plus the Tele Agent, around the clock.
Included with every plan. From 5 GB to Unlimited, the inclusions don't shrink.
Questions, answeredThe six things everyone asks firstQuestions, answeredShort answers, no sales pitch.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.
Which phones work?
Any carrier-unlocked, eSIM-capable iPhone or Android.
What if data runs out?
80% alert, then one-tap top-up. No bill shock.
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. Short answers, no sales pitch — the questions first, always.
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.2Scan the QR codeThe eSIM installs straight onto your phone. No store, no plastic SIM.3Pick your planChoose data for your trip — checkout takes about two minutes.
Three-step setup. Three steps, about two minutes — the Developers · Slovakia ritual, no store visit.

Your Slovakia plan is two minutes away

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

See plans and pricing Talk to the Tele Agent