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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 Singapore

Using developers in Singapore? You are on the local edition — key facts for Singapore (capital Singapore, dial code +65) are below. esimgomobile plans for Singapore are live now — monthly plans from $8/mo and one-time travel packs from $3.65, with live checkout.

CapitalSingapore
Dial code+65
CurrencySingapore dollar (SGD)
Time zoneUTC+8
Main languagesEnglish, Malay, Mandarin, Tamil

Plans are live — see plans and pricing.

The experience

The product, up close.

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

Atlas 20GB
20 GB · 30 days
Singapore
Atlas 20GB — 20 GB · 30 days, prepaid and ready on Developers · Singapore.
  1. 1Usage ring compresses the whole plan into one glanceable number.
  2. 2Percent remaining is the only metric most travelers check.
Support
How does Developers · Singapore work?
Enter your trip details and get an instant answer — no account needed.
Support snippet — Developers · Singapore: 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.
Tele Agent transcript
What happens when my data runs out in Singapore?
You get a heads-up at 80%, then one-tap top-up. No roaming-bill surprises in Singapore.
Tele Agent transcript on Developers · Singapore: 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.
Network
5G
Singapore connected
Network widget for Developers · Singapore: 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.
esimgomobile.com
Plans for Singapore
Atlas 5GB5 GB · 30 days
Atlas 20GB20 GB · 30 days
Atlas 50GB50 GB · 60 days
Compare plans
Plan picker on Developers · Singapore: 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.
Olivier Bergeron
Get connected
1 Pick a plan2 Scan QR3 Land online
Three steps on Developers · Singapore: pick a plan, scan the QR, land online.
  1. 1A real traveler quote, tied to the destination it mentions.
  2. 2Reviews reference actual trips, not generic praise.
Virtual number
+1 205 444 7616
Routes toSingapore
SMS + voiceEnabled
Your second line on Developers · Singapore: +1 205 444 7616 — real number, SMS and voice enabled.
  1. 1A real traveler quote, tied to the destination it mentions.
  2. 2Reviews reference actual trips, not generic praise.
esimgomobile.com
Checkout
Atlas 5GB — Singaporetotal
Taxescalculated
Pay securely
256-bit encrypted · Amazon Pay
Secure checkout on Developers · Singapore: 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.
man holding smartphone with app icons displayed
Singapore
eSIM dataLive
Local numberAvailable
5GYes
Coverage card on Developers · Singapore: data live, local number available, 5G where it exists.
  1. 1A real traveler quote, tied to the destination it mentions.
  2. 2Reviews reference actual trips, not generic praise.
Speed test
389Mbps
5G · Singapore · 89 ms
Illustrative speed readout on Developers · Singapore: 389 Mbps, 89 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.
Singapore · coverage
5 carriers · automatic selection
Coverage map on Developers · Singapore: 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.
Coverage
195
destinations live
Singapore5G ready
Check coverage
Coverage at a glance for Developers · Singapore: 195 destinations live, fastest local partner selected on its own.
  1. 1The plan card shows exactly what you're buying — data, days, destination.
  2. 2One tap starts the two-minute QR install.
oia village on santorini
“Switched plans mid-trip in Singapore. Took about a minute.”
Omar H.Verified traveler · Singapore
Traveler review for Developers · Singapore: “Switched plans mid-trip in Singapore. Took about a minute.” — Omar H..
  1. 1Coverage status at a glance: data live, number available, 5G ready.
  2. 2Green means go — no guessing about what's supported.
Singapore · 5G
Signal widget on Developers · Singapore: network generation and place, always visible.
  1. 1Signal widget: network generation and destination, always visible.
  2. 2Five bars, zero ambiguity about what you're connected to.
My eSIM
63%5 GB left
Days left13
Top up+10 GB
Data dashboard on Developers · Singapore: 63% 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.
Jimmy Liao
Ready for Singapore?
Get your eSIM
“Ready for Singapore?” — the banner on Developers · Singapore: two minutes from curious to connected.
  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 20GB20 GB · 30 days
Singapore
Install eSIM
Atlas 20GB on Developers · Singapore — 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.
Install
1 Scan2 Add3 Go
The Developers · Singapore install: QR in three steps — scan, add, go, about two minutes.
  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 Singapore plan is ready.
Push · just now
Push notification on Developers · Singapore: 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.
Launch facts
195destinations live
31free tools
$8entry monthly plan
Launch facts behind Developers · Singapore — 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.
a man and woman having conversation while wearing headsets — Developers · Singapore: Trailheads and lookouts: offline maps downloaded, just in case.
Developers · Singapore: Trailheads and lookouts: offline maps downloaded, just in case.
black and white new york city skyline — Developers · Singapore: Check-in lines move faster when your documents are on your phone.
Developers · Singapore: Check-in lines move faster when your documents are on your phone.
Robert Pügner — Developers · Singapore: Night markets and late trains — connected the whole way through.
Developers · Singapore: Night markets and late trains — connected the whole way through.
a woman inside a restaurant using a laptop — Developers · Singapore: Downtown, connected: the eSIM finds the fastest local network on its own.
Developers · Singapore: Downtown, connected: the eSIM finds the fastest local network on its own.
silhouette of a woman with a backpack standing at an airport terminal — Developers · Singapore: Every endpoint returns the same shape — learn one, know them all.
Developers · Singapore: Every endpoint returns the same shape — learn one, know them all.
Serene Rural Dirt Pathway Leading Through Countryside — Developers · Singapore: The conference badge: QR ticket scanned, session schedule synced.
Developers · Singapore: The conference badge: QR ticket scanned, session schedule synced.
Bhargava Marripati — Developers · Singapore: The long layover: streaming, working and messaging, all covered.
Developers · Singapore: The long layover: streaming, working and messaging, all covered.
a smartphone with a black screen — Developers · Singapore: City lights after dark — the eSIM doesn't care what time it is.
Developers · Singapore: City lights after dark — the eSIM doesn't care what time it is.
Willian Justen de Vasconcellos — Developers · Singapore: The red-eye recovery: hotel early-check-in arranged mid-flight.
Developers · Singapore: The red-eye recovery: hotel early-check-in arranged mid-flight.
a headset on a laptop — Developers · Singapore: Webhooks tell you when data runs low, plans expire, top-ups land.
Developers · Singapore: Webhooks tell you when data runs low, plans expire, top-ups land.
aerial view of midtown manhattan skyscrapers — Developers · Singapore: Market mornings: look up the dish, translate the menu, pay by phone.
Developers · Singapore: Market mornings: look up the dish, translate the menu, pay by phone.
Pixabay — Developers · Singapore: Hiking the ridge: trail map offline, emergency numbers saved.
Developers · Singapore: Hiking the ridge: trail map offline, emergency numbers saved.
caleb charles — Developers · Singapore: Coworking abroad: laptop tethered, calls crisp, deadlines met.
Developers · Singapore: Coworking abroad: laptop tethered, calls crisp, deadlines met.
smartphone on colorful backround — Developers · Singapore: Rooftop check-in: boarding passes and hotel keys, all on the phone.
Developers · Singapore: Rooftop check-in: boarding passes and hotel keys, all on the phone.
aerial view of manhattan skyline and hudson river — Developers · Singapore: The departure board flips: gate found, lounge located, all on the eSIM.
Developers · Singapore: The departure board flips: gate found, lounge located, all on the eSIM.
people working as call center agents — Developers · Singapore: The night bus: entertainment downloaded, messages queued, rest easy.
Developers · Singapore: The night bus: entertainment downloaded, messages queued, rest easy.
friends relaxing on malay beach in the philippines — Developers · Singapore: The connected trip: maps, messages and translation, all on one eSIM.
Developers · Singapore: The connected trip: maps, messages and translation, all on one eSIM.
eiffel tower and statue in paris at dusk — Developers · Singapore: Golden hour, fully online — photo backups upload before dinner.
Developers · Singapore: Golden hour, fully online — photo backups upload before dinner.
woman laptop freelancer web design — Developers · Singapore: Rate limits are generous and documented — no surprise 429s.
Developers · Singapore: Rate limits are generous and documented — no surprise 429s.
traffic on a street in paris — Developers · Singapore: The viewpoint at golden hour: livestream the sunset to everyone back home.
Developers · Singapore: The viewpoint at golden hour: livestream the sunset to everyone back home.

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.

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.

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

  • If a page won't load, toggle airplane mode for ten seconds — it forces a fresh network attach.
  • Check that your phone is carrier-unlocked before you buy any eSIM — locked phones can't add one.
  • Download offline maps for your destination — they save data and work in dead zones.
  • WhatsApp, iMessage and FaceTime keep your existing number on a data eSIM — no need to tell anyone a new number.
  • Screenshot your hotel address and booking confirmations — you'll want them with no signal.
  • Charge your phone before long travel days; weak signal areas drain batteries faster.

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.

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.

Charts & explainers

Every chart that matters for Singapore.

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.
How esimgomobile Developers worksFour steps from question to answerHow this tool worksBuilt to answer one question well.1Apply itJump straight to the plan, setting or page it points to.2Open the toolNo account needed — it loads instantly in your browser.3Enter your detailsTrip, data needs, destination. The tool does the math.4Get the answerClear result with next steps — save it or act on it.
Tool walkthrough. Developers · Singapore, demystified: open, enter, answer, act.
Plan comparison matrixEvery plan for Singapore — data, validity, best fitPlans at a glanceFour prepaid plans cover every kind of trip to Singapore.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 · Singapore: 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.Private by designyour inputs stay in your browserInstant resultsno waiting, no signupAlways currentreflects live plans and coverageShares wellsend the answer to travel companionsMobile friendlyworks on the phone in your handIllustrative profile based on tool design — not measured telemetry.
Capability profile. What Developers · Singapore does best — the capability profile, honestly ranked.
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.1Scan the QR codeThe eSIM installs straight onto your phone. No store, no plastic SIM.2Land connectedSwitch the line on when you arrive — online before baggage claim.3Pick your planChoose data for your trip — checkout takes about two minutes.
Three-step setup. Buy, scan, land: the whole sequence fits in a coffee queue.
Questions, answeredThe six things everyone asks firstQuestions, answeredShort answers, no sales pitch.Does hotspot work?
Yes — share your connection with laptop or tablet.
How fast is setup?
About two minutes: plan, QR scan, done.
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.
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.
FAQ at a glance. Short answers, no sales pitch — the questions first, always.
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 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. Six traveler shapes, one tool — Developers · Singapore's use cases.
Network at a glanceCoverage facts for SingaporeNetwork at a glanceThe numbers that matter before you buy.195destinations liveesimgomobile network data5Gwhere available in Singaporeesimgomobile 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. Singapore connects to the fastest available local partner network automatically.
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.2Screenshot bookingsHotel address & confirmations, available with no signal.3Check unlock statusCarrier-locked phones can't add an eSIM — verify first.4Set an 80% alertA top-up should never surprise you mid-trip.
Pro tips. The small things that separate smooth trips from stressful ones.
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.24/7 supportReal humans plus the Tele Agent, around the clock.Keep your WhatsAppYour existing number keeps working on the data line.5G where availableFastest local partner network, selected automatically.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. 5G, hotspot, WhatsApp continuity, top-up, support, six languages — all tiers.
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.

Take Singapore with you, connected

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

See plans and pricing Talk to the Tele Agent