WHO Global Health Observatory API

Free World Health Organization API with no key: 2,000+ health indicators by country and year — life expectancy, mortality, immunisation and disease data. Tested.

No API key requiredHTTPSFree tier

Endpoint tested and returned HTTP 200 on 19 Aug 2026

What is the WHO Global Health Observatory API?

The WHO Global Health Observatory API is a free, key-free OData API providing more than 2,000 global health indicators by country and year, including life expectancy, mortality rates, immunisation coverage and disease prevalence.

This is the authoritative source for international health statistics, published by the World Health Organization. Indicators cover mortality, life expectancy, immunisation, nutrition, health systems capacity and disease burden across every member state.

It is an OData service rather than a conventional REST API, which shapes how you query it: filtering, selection and pagination use OData syntax with $filter, $select and $top. Once you know that convention it is powerful, but it looks alien if you are expecting normal query parameters.

Quick facts

Base URL: https://ghoapi.azureedge.net/api
Authentication: No API key required.
Rate limit: No published limit; fair use expected.
Pricing: Free open data from the World Health Organization.
CORS: Not enabled — call it from your server
Official docs: Read the docs

How to use the WHO Global Health Observatory API

Every request below was executed against the live API on 19 Aug 2026, and the response shown is the real body it returned — not an illustration.

1. List available health indicators

GET https://ghoapi.azureedge.net/api/Indicator?$top=2

curl

curl 'https://ghoapi.azureedge.net/api/Indicator?$top=2'

JavaScript (fetch)

const res = await fetch("https://ghoapi.azureedge.net/api/Indicator?$top=2");
if (!res.ok) throw new Error(`Request failed: ${res.status}`);
const data = await res.json();
console.log(data);

Python (requests)

import requests

res = requests.get("https://ghoapi.azureedge.net/api/Indicator?$top=2", timeout=20)
res.raise_for_status()
print(res.json())

Response — HTTP 200

{
  "@odata.context": "https://ghoapi.azureedge.net/api/$metadata#Indicator",
  "value": [
    {
      "IndicatorCode": "ABORTION_ADMISSIONS",
      "IndicatorName": "Abortion admissions per 1000 women of reproductive age",
      "Language": "EN"
    },
    {
      "IndicatorCode": "Adult_curr_cig_smoking",
      "IndicatorName": "Archived, see TOBACCO_INDICATOR",
      "Language": "EN"
    }
  ]
}

Parameters

Parameter	Type	Required	Description
`Indicator`	path	Optional	List all available indicator codes and names. `Indicator`
`<IndicatorCode>`	path	Optional	Fetch all data for one indicator. `WHOSIS_000001`
`$filter`	string	Optional	OData filter expression. `SpatialDim eq 'PAK'`
`$top`	integer	Optional	Limit the number of records returned. `10`
`$select`	string	Optional	Restrict returned fields. `SpatialDim,TimeDim,Value`

Response fields

@odata.contextstring: OData metadata URL describing the schema.
valuearray: The records array — always nested under `value`.
value[].IndicatorCodestring: Indicator identifier such as WHOSIS_000001 for life expectancy.
value[].SpatialDimstring: ISO-3 country code or region identifier.
value[].TimeDiminteger: Year of the observation.
value[].NumericValuenumber: The measured value.

What you can build with the WHO Global Health Observatory API

Compare life expectancy or mortality across countries
Chart immunisation coverage trends over time
Support global health research and journalism
Build public health dashboards with authoritative data

Common errors and how to fix them

Empty value array

The indicator code does not exist or has no data for that filter.

Fix: List /api/Indicator first to find valid codes — they are opaque strings like WHOSIS_000001.

OData syntax errors

Filters use OData, not normal query parameters.

Fix: Use $filter=SpatialDim eq 'PAK' with single quotes around string literals.

Very large responses

A full indicator spans every country and year.

Fix: Always constrain with $filter and $top.

WHO Global Health Observatory API — frequently asked questions

Is the WHO health data API free?

Yes, completely free with no API key. It is open data published by the World Health Organization.

Why does the query syntax look unusual?

It is an OData service, so filtering and selection use $filter, $select and $top rather than conventional query parameters. String literals need single quotes.

How do I find the right indicator code?

Request /api/Indicator to list all available indicators with their codes and names. The codes are opaque — WHOSIS_000001 is life expectancy at birth, for example.

What country codes does it use?

ISO 3166-1 alpha-3 codes in the SpatialDim field, plus WHO region identifiers for aggregated data.

Tools that pair with this API

JSON Formatter

Format, beautify and minify JSON online with 2-space, 4-space or tab indentation. Sort keys alphabetically and catch syntax errors instantly — free and private.

CSV to JSON Converter

Convert CSV to a JSON array of objects online. Header-row detection, comma/semicolon/tab delimiters and pretty-printed output — 100% in your browser.

Percentage Calculator

Calculate what X% of a number is, what percent one number is of another, and percentage increase or decrease between two values — instantly and free.

Alternatives to WHO Global Health Observatory API

If WHO Global Health Observatory does not fit, these health & medical apis cover similar ground. Every one was called before publishing, and each links to its own reference page with a working curl command and the response it returned.

API	What it does	Auth	CORS	Last verified
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ClinicalTrials.gov	Free ClinicalTrials.gov API with no key: 500,000+ clinical studies worldwide with conditions, interventions, eligibility, locations and results. Tested example.	No key	No	19 Aug 2026
PubChem	Free NIH PubChem API with no key: 100M+ chemical compounds with formulas, molecular weight, structures, synonyms, safety and bioactivity data. Tested.	No key	Yes	20 Aug 2026
CDC Environmental Public Health Tracking	Free CDC Environmental Public Health Tracking API with no key: asthma, air quality, drinking water, heat illness, lead poisoning and climate health measures by state and county.	No key	Yes	21 Aug 2026
CDC Open Data	Free CDC Open Data API with no key: hundreds of public health datasets — mortality, life expectancy, chronic disease, environmental health — queryable with SoQL filters.	No key	Yes	21 Aug 2026

All Health & Medical APIs

WHO Global Health Observatory is an independent third-party service and is not affiliated with ByteTools or ByteVancer. Details on this page were verified on 19 Aug 2026; always check the official documentation before relying on this API in production, as terms and limits can change.