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Amazon Halo API alternative: where Halo users and developers go now

Amazon Halo shut down in 2023 and never had a public API: what happened, and where activity, sleep and body data come from now, stored in FHIR.

Amazon discontinued Halo: support ended on 31 July 2023, the Halo Band, View, Rise and the Halo app stopped working on 1 August 2023, and the data left in Halo was deleted after that. Halo never had a public developer API. Anpheros does not connect to Amazon Halo's cloud itself, and nobody can now: your code reads the device people moved to (or the phone's health store), and Anpheros keeps the record with the person's consent. This page explains what happened, and where activity, sleep and body data come from today.

Read steps and sleep from the phone and store them in FHIR (5 minutes)

Most trackers people moved to write into Apple Health or Health Connect. Your phone app reads the daily values there, sends them to your backend, and the backend writes them to the person's record (sandbox key sk_test_…). Steps for one day:

curl -X POST https://platform.anpheros.com/fhir/R4/Observation \
  -H "Authorization: Bearer $ANPHEROS_KEY" \
  -H "Content-Type: application/fhir+json" \
  -H "X-Anpheros-Author-Type: device" \
  -d '{"resourceType":"Observation","status":"final",
       "category":[{"coding":[{"system":"http://terminology.hl7.org/CodeSystem/observation-category","code":"activity"}]}],
       "code":{"coding":[{"system":"http://loinc.org","code":"41950-7","display":"Number of steps in 24 hour Measured"}]},
       "subject":{"reference":"Patient/<id>"},
       "effectivePeriod":{"start":"2026-11-02T00:00:00+01:00","end":"2026-11-03T00:00:00+01:00"},
       "valueQuantity":{"value":8412,"unit":"{steps}","system":"http://unitsofmeasure.org","code":"{steps}"},
       "device":{"display":"Apple Watch"}}'

The same in Python, for a batch of nights: every sleep period becomes one Observation, sent together in one transaction Bundle.

import os, requests

FHIR = "https://platform.anpheros.com/fhir/R4"
fhir = {"Authorization": f"Bearer {os.environ['ANPHEROS_KEY']}", "Content-Type": "application/fhir+json",
        "X-Anpheros-Author-Type": "device"}

# What your phone app sent: one item per night, read from HealthKit (sleepAnalysis) or Health Connect (SleepSessionRecord)
nights = [
    {"start": "2026-11-01T23:05:00+01:00", "end": "2026-11-02T06:48:00+01:00", "asleep_min": 421, "source": "Galaxy Watch"},
    {"start": "2026-11-02T23:30:00+01:00", "end": "2026-11-03T07:02:00+01:00", "asleep_min": 409, "source": "Galaxy Watch"},
]

entries = [{
    "request": {"method": "POST", "url": "Observation"},
    "resource": {
        "resourceType": "Observation", "status": "final",
        "category": [{"coding": [{"system": "http://terminology.hl7.org/CodeSystem/observation-category", "code": "activity"}]}],
        "code": {"coding": [{"system": "http://loinc.org", "code": "93832-4", "display": "Sleep duration"}]},
        "subject": {"reference": "Patient/<id>"},
        "effectivePeriod": {"start": n["start"], "end": n["end"]},
        "valueQuantity": {"value": n["asleep_min"], "unit": "min", "system": "http://unitsofmeasure.org", "code": "min"},
        "device": {"display": n["source"]},
    },
} for n in nights]

r = requests.post(FHIR, headers=fhir, json={"resourceType": "Bundle", "type": "transaction", "entry": entries})
print(r.status_code, len(entries), "nights saved")

And in JavaScript (Node 18+), body weight from a smart scale:

const fhir = { Authorization: `Bearer ${process.env.ANPHEROS_KEY}`, 'Content-Type': 'application/fhir+json' };
const w = { time: '2026-11-03T07:10:00+01:00', kg: 72.4, source: 'Smart scale' }; // from your phone app

await fetch('https://platform.anpheros.com/fhir/R4/Observation', {
  method: 'POST', headers: fhir,
  body: JSON.stringify({
    resourceType: 'Observation', status: 'final',
    category: [{ coding: [{ system: 'http://terminology.hl7.org/CodeSystem/observation-category', code: 'vital-signs' }] }],
    code: { coding: [{ system: 'http://loinc.org', code: '29463-7', display: 'Body weight' }] },
    subject: { reference: 'Patient/<id>' },
    effectiveDateTime: w.time,
    valueQuantity: { value: w.kg, unit: 'kg', system: 'http://unitsofmeasure.org', code: 'kg' },
    device: { display: w.source },
  }),
});

The phone side is on Apple HealthKit to FHIR and Health Connect to FHIR. The Anpheros side is standard FHIR R4, so the same requests work with any FHIR server, and the record no longer depends on one vendor staying in business.

Ways to get former Halo data into FHIR

What happened to Amazon Halo

Halo tracked activity, sleep, body fat (from body scans) and tone of voice, and offered nutrition and fitness content. Before the shutdown, people could download or delete their Halo data from the app's settings and save body scan images to their phone. Amazon refunded Halo devices and bands bought in the previous 12 months and any unused prepaid subscription, stopped monthly fees and offered free recycling.

What Amazon Halo offered developers

No public API. Amazon's announcements describe no developer API, keys or documentation for Halo. Integrations were account links with selected partners, which the person switched on in the Halo app and could revoke: WW (activity turned into FitPoints), John Hancock Vitality, and Cerner (body fat to care providers, activity and sleep to wellness programmes, starting with Sharp HealthCare). All of them ended with the service. Amazon documents no "Halo Share" or partner cloud API, and no Apple Health or Google Fit sync.

What developers use instead. Former Halo users need another tracker, and current trackers reach your app in two ways:

Halo's tone-of-voice feature has no counterpart in the health stores or APIs on this page.

Sources: Amazon: Halo discontinued, Amazon: introducing Halo (2020), Amazon: Halo View and Halo Fitness (2021), November 2026.

Halo-type data as FHIR Observations

Body fat and tone of voice are not in our mapping table; if you store body fat, use a code you document. The full table is on Wearable data in FHIR.

Frequently asked questions

What replaced Amazon Halo?

No single product. Amazon's shutdown notice covers refunds, data download and recycling, not a successor. Former Halo users need another tracker: most current trackers write to Apple Health or Health Connect, and several have their own developer APIs.

Did Amazon Halo have an API?

Not a public one. Halo worked with selected partners (WW, John Hancock Vitality, Cerner) through account links the person approved in the app. There was no developer portal, and all of it ended on 1 August 2023.

Can I still get my Amazon Halo data?

Only if you downloaded it before the shutdown. Amazon deleted the data that remained in Halo after 1 August 2023.

Did Halo sync with Apple Health or Google Fit?

Amazon's official materials never describe it, and nothing syncs today because the service has ended.

Which API should I use instead of Halo?

Start with the phone: Apple HealthKit on iPhone and Health Connect on Android cover most trackers with one integration each. Add a vendor's cloud API (Oura, Garmin, WHOOP, Withings, Polar or the Google Health API) when you need data on a server without the phone app.

Does Anpheros connect to Amazon Halo?

No, and it cannot: Halo no longer exists. For the device a person uses now, your code reads it (or HealthKit / Health Connect) and writes standard FHIR to Anpheros. Direct connectors for current brands are on our roadmap; tell us with the button on this page which one you need.

Related

• Wearable APIs: every brand compared
• Wearable data in FHIR (Apple Health, Health Connect)
• Apple HealthKit to FHIR · Health Connect to FHIR
• Oura API to FHIR · Garmin API to FHIR · Google Health API
• Fitbit Web API shutdown: what to use instead

Read https://developers.anpheros.com/guides/amazon-halo-alternative.md and help me apply this guide to my own project. Use the Anpheros sandbox (base URL https://platform.anpheros.com) with my API key from the ANPHEROS_KEY environment variable, never written in the code. Give me complete, runnable code, the response I should expect, and how to fix the errors in https://developers.anpheros.com/guides/troubleshooting.md if a call fails.

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