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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 Monaco

Using developers in Monaco? You are on the local edition — key facts for Monaco (capital Monaco, dial code +377) are below. esimgomobile plans for Monaco are live now — monthly plans from $8/mo and one-time travel packs from $3.65, with live checkout.

CapitalMonaco
Dial code+377
CurrencyEuro (EUR)
Time zoneUTC+1
Main languagesFrench

Plans are live — see plans and pricing.

Product tour

The product, up close.

A visual walkthrough built for this page — mockups of the exact experience plus photography from the field.

esimgomobile.com
API quickstart
curl https://api.esimgomobile.com/v1/esims \
  -H "Authorization: Bearer $KEY" \
  -d '{"country":"MO"}'
200 OK · 72 ms
REST API behind Developers · Monaco: 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.
Speed test
697Mbps
5G · Monaco · 81 ms
Illustrative speed readout on Developers · Monaco: 697 Mbps, 81 ms — example figures, not live measurements.
  1. 1The plan card shows exactly what you're buying — data, days, destination.
  2. 2One tap starts the two-minute QR install.
Virtual number
+1 205 045 6234
Routes toMonaco
SMS + voiceEnabled
Your second line on Developers · Monaco: +1 205 045 6234 — real number, SMS and voice enabled.
  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.
Coverage
195
destinations live
Monaco5G ready
Check coverage
Coverage at a glance for Developers · Monaco: 195 destinations live, fastest local partner selected on its own.
  1. 1Illustrative speed readout: sample carrier, city and latency figures.
  2. 2The meter demonstrates the readout — figures are examples, not live measurements.
Support
How does Developers · Monaco work?
Enter your trip details and get an instant answer — no account needed.
Support snippet — Developers · Monaco: what it does, in one honest answer.
  1. 1Coverage status at a glance: data live, number available, 5G ready.
  2. 2Green means go — no guessing about what's supported.
stunning new york city night skyline with bridge
Get connected
1 Pick a plan2 Scan QR3 Land online
Three steps on Developers · Monaco: pick a plan, scan the QR, land online.
  1. 1Coverage status at a glance: data live, number available, 5G ready.
  2. 2Green means go — no guessing about what's supported.
Atlas 50GB
50 GB · 60 days
Monaco
Atlas 50GB — 50 GB · 60 days, prepaid and ready on Developers · Monaco.
  1. 1The plan chip: name, allowance and destination in one line.
  2. 2Everything you need to confirm you're on the right plan.
Launch facts
195destinations live
31free tools
$8entry monthly plan
Launch facts behind Developers · Monaco — 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?
esimgomobile.com
eberhard grossgasteiger
esimgomobile Developers
Travel guides · 8 min read
From the blog: “esimgomobile Developers” — travel guides in about eight minutes.
  1. 1Checkout shows the full price before you pay. Nothing hidden.
  2. 2Amazon Pay handles payment securely; taxes are calculated for you.
Monaco · 5G
Signal widget on Developers · Monaco: 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.
Tom Fisk
Your Monaco number is waiting.
Get your eSIM
Live now · no waitlist
“Your Monaco number is waiting.” — the CTA card on Developers · Monaco: plans live now, no waitlist.
  1. 1Coverage status at a glance: data live, number available, 5G ready.
  2. 2Green means go — no guessing about what's supported.
Network
5G
Monaco connected
Network widget for Developers · Monaco: 5G, full bars — zero ambiguity about the connection.
  1. 1Illustrative speed readout: sample carrier, city and latency figures.
  2. 2The meter demonstrates the readout — figures are examples, not live measurements.
Tele Agent
“Setting up your Monaco line…”
AI voice agent on Developers · Monaco — answers spoken aloud, never a support ticket.
  1. 1The plan card shows exactly what you're buying — data, days, destination.
  2. 2One tap starts the two-minute QR install.
esimgomobile.com
Dashboard
Active eSIMs2
Data left20 GB
Current cityMonaco
Web dashboard on Developers · Monaco: every eSIM, every trip, 20 GB left — one screen.
  1. 1Three plans side by side so the trade-off is obvious.
  2. 2Pick by trip length, not by decoding fine print.
195
destinations live
launch fact
Launch fact behind Developers · Monaco: 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.
Tele Agent transcript
Do I need a local number in Monaco?
A local Monaco number is available on this plan — I can attach it before you land.
Tele Agent transcript on Developers · Monaco: 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 plan
Atlas 5GB5 GB · 30 days
Monaco
Install eSIM
Atlas 5GB on Developers · Monaco — 5 GB · 30 days, prepaid with the full price shown before you pay.
  1. 1The plan card shows exactly what you're buying — data, days, destination.
  2. 2One tap starts the two-minute QR install.
esimgomobile.com
Plans for Monaco
Atlas 5GB5 GB · 30 days
Atlas 20GB20 GB · 30 days
Atlas 50GB50 GB · 60 days
Compare plans
Plan picker on Developers · Monaco: 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.
Man taking photo out of airplane window, capturing wing view with smartphone.
Your Monaco number is waiting.
Get your eSIM
“Your Monaco number is waiting.” — the banner on Developers · Monaco: 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.
Tele Agent
Do I need a local number in Monaco?
A local Monaco number is available on this plan — I can attach it before you land.
Tele Agent chat on Developers · Monaco — real questions, specific answers, zero telecom jargon.
  1. 1The plan card shows exactly what you're buying — data, days, destination.
  2. 2One tap starts the two-minute QR install.
Stan Versluis — Developers · Monaco: The viewpoint at golden hour: livestream the sunset to everyone back home.
Developers · Monaco: The viewpoint at golden hour: livestream the sunset to everyone back home.
church on sea shore — Developers · Monaco: One curl call provisions a Monaco eSIM — 200 OK in milliseconds.
Developers · Monaco: One curl call provisions a Monaco eSIM — 200 OK in milliseconds.
Jonas F — Developers · Monaco: Migrate from Twilio in three steps — the toolkit does the heavy lifting.
Developers · Monaco: Migrate from Twilio in three steps — the toolkit does the heavy lifting.
wing of flying airplane — Developers · Monaco: The business trip: client deck synced, video call joined from the taxi.
Developers · Monaco: The business trip: client deck synced, video call joined from the taxi.
David Gan — Developers · Monaco: The commute, handled: podcasts downloaded, messages sent, no dead zones.
Developers · Monaco: The commute, handled: podcasts downloaded, messages sent, no dead zones.
person video calling using a laptop — Developers · Monaco: API keys rotate in one click — the dashboard makes it boring.
Developers · Monaco: API keys rotate in one click — the dashboard makes it boring.
a close up shot of a headset on documents — Developers · Monaco: Travelers stay online from the moment they land — no SIM queues, no roaming shock.
Developers · Monaco: Travelers stay online from the moment they land — no SIM queues, no roaming shock.
a person holding black smartphone — Developers · Monaco: Street-food stalls and mobile pay: dinner ordered without a word of the language.
Developers · Monaco: Street-food stalls and mobile pay: dinner ordered without a word of the language.
Skyline of a Modern City with Illuminated Buildings at Night — Developers · Monaco: The connected trip: maps, messages and translation, all on one eSIM.
Developers · Monaco: The connected trip: maps, messages and translation, all on one eSIM.
airplane wing and thick clouds — Developers · Monaco: The API issues eSIMs the way your app issues everything else — over HTTPS.
Developers · Monaco: The API issues eSIMs the way your app issues everything else — over HTTPS.
new york cityscape — Developers · Monaco: Webhooks tell you when data runs low, plans expire, top-ups land.
Developers · Monaco: Webhooks tell you when data runs low, plans expire, top-ups land.
breathtaking view of imerovigli santorini cliffside — Developers · Monaco: Every endpoint returns the same shape — learn one, know them all.
Developers · Monaco: Every endpoint returns the same shape — learn one, know them all.
eiffel tower — Developers · Monaco: Build on the same rails the Monaco checkout uses.
Developers · Monaco: Build on the same rails the Monaco checkout uses.
a person walking on a trail in the mountains — Developers · Monaco: Rooftop check-in: boarding passes and hotel keys, all on the phone.
Developers · Monaco: Rooftop check-in: boarding passes and hotel keys, all on the phone.
affectionate mother and daughter — Developers · Monaco: The museum queue skips itself: tickets bought online, straight to the door.
Developers · Monaco: The museum queue skips itself: tickets bought online, straight to the door.
white clouds in the blue sky — Developers · Monaco: The departure board flips: gate found, lounge located, all on the eSIM.
Developers · Monaco: The departure board flips: gate found, lounge located, all on the eSIM.
Mikhail Nilov — Developers · Monaco: Old town, new tricks: translation apps working in real time.
Developers · Monaco: Old town, new tricks: translation apps working in real time.
eiffel tower paris france — Developers · Monaco: The group chat stays live across every border you cross.
Developers · Monaco: The group chat stays live across every border you cross.
grayscale photo of people hiking on the mountain — Developers · Monaco: Museum afternoons with audio guides streaming, not buffering.
Developers · Monaco: Museum afternoons with audio guides streaming, not buffering.
Radubradu — Developers · Monaco: Souvenir hunting with live currency conversion in your pocket.
Developers · Monaco: Souvenir hunting with live currency conversion in your pocket.

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 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.

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. 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

  • Charge your phone before long travel days; weak signal areas drain batteries faster.
  • Save your eSIM QR code somewhere safe (email it to yourself) in case you switch phones mid-trip.
  • Buy and install your eSIM before departure — airport Wi-Fi is the worst place to set up connectivity.
  • 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.

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.

See the math

Every chart that matters for Monaco.

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.
Pro tipsFour habits of the always-connectedPro tipsSmall habits, big difference.1Screenshot bookingsHotel address & confirmations, available with no signal.2Install before you flyAirport Wi-Fi is the worst place to set up connectivity.3Set an 80% alertA top-up should never surprise you mid-trip.4Check unlock statusCarrier-locked phones can't add an eSIM — verify first.
Pro tips. Four habits for smooth trips — pro tips for Developers · Monaco.
Plan comparison matrixEvery plan for Monaco — data, validity, best fitPlans at a glanceFour prepaid plans cover every kind of trip to Monaco.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. Developers · Monaco: four plans, four trip shapes — the matrix carries no fine print.
esimgomobile Developers: capability profileWhat the tool is good at — illustrative profileCapability profileFive strengths, ranked by what users feel first.Shares wellsend the answer to travel companionsMobile friendlyworks on the phone in your handPrivate by designyour inputs stay in your browserInstant resultsno waiting, no signupAlways currentreflects live plans and coverageIllustrative profile based on tool design — not measured telemetry.
Capability profile. What Developers · Monaco does best — the capability profile, honestly ranked.
Network at a glanceCoverage facts for MonacoNetwork at a glanceThe numbers that matter before you buy.195destinations liveesimgomobile network data5Gwhere available in Monacoesimgomobile 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.
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.
Is it a contract?
No — prepaid. Service simply stops instead of charging extra.
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.
Does hotspot work?
Yes — share your connection with laptop or tablet.
How fast is setup?
About two minutes: plan, QR scan, done.
FAQ at a glance. Still curious? The Tele Agent answers anything else instantly.
Who it's forFour travelers, one toolWho it's forBuilt for real trip shapes, not personas.1The family organizer
One tool, every traveler's needs covered.
esimgomobile network data2The planner
Compare before you commit — know the right plan weeks ahead.
esimgomobile network data3The last-minute flyer
Answer in minutes, eSIM installed before boarding.
esimgomobile network data4The remote worker
Size data for video calls and hotspotting with confidence.
esimgomobile network data
Use cases. Planners, sprinters, remote workers, families — who's it for.
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 · Monaco usage guide.
How esimgomobile Developers worksFour steps from question to answerHow this tool worksBuilt to answer one question well.1Open the toolNo account needed — it loads instantly in your browser.2Get the answerClear result with next steps — save it or act on it.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. Four steps from landing on Developers · Monaco to having your answer.
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.Hotspot includedShare with your laptop or tablet at no extra cost.24/7 supportReal humans plus the Tele Agent, around the clock.6 languagesThe app speaks your language, wherever you're from.5G where availableFastest local partner network, selected automatically.Keep your WhatsAppYour existing number keeps working on the data line.
Included with every plan. 5G, hotspot, WhatsApp continuity, top-up, support, six languages — all tiers.
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 · Monaco ritual, no store visit.

Start your Monaco trip online

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

See plans and pricing Talk to the Tele Agent