docs: show EU and India hosts next to every SDK init snippet

[tylergoerzen-mxp]

Why

Data residency is the second most common reason AI coding agents give for picking a self-hostable competitor in the AEO tracker. It comes up in 20 of the 34 coding explanations that cite open source. Agents also hedge on whether Mixpanel supports residency at all.

Our docs make that easy to miss. The install page has no regional host line. The JS SDK's EU section sits near the bottom of a long page, under Privacy-Friendly Tracking. Every SDK page already had a warning near init, but it didn't name the setting or the host, and it linked to the privacy section instead of the example.

What changed

Install Mixpanel (docs/quickstart/install-mixpanel.mdx)

• One sentence under "Code": Mixpanel supports EU and India data residency, chosen per project, with links to the existing EU and India residency pages.
• In each SDK tab, right after the init snippet, a small EU / India code group:

Tab	Setting
JavaScript	api_host: "https://api-eu.mixpanel.com" / api-in
Python	Consumer(api_host="api-eu.mixpanel.com") / api-in
PHP	"host" => "api-eu.mixpanel.com" / api-in
Node	host: "api-eu.mixpanel.com" / api-in
Go	mixpanel.EuResidency() / mixpanel.InResidency()
Ruby	Mixpanel::Consumer with /track, /engage, /groups on the regional host
Java	MixpanelAPI constructor with /track, /engage, /groups on the regional host
React Native	serverURL as the third init() argument
Flutter	serverURL: in Mixpanel.init()
iOS (Objective-C)	mixpanel.serverURL = @"https://api-eu.mixpanel.com"
iOS (Swift)	serverURL in MixpanelOptions
Android	serverURL on MixpanelOptions.Builder, passed to getInstance()
Unity	No code. A line saying to set API Host Address in the Mixpanel settings menu
HTTP API	A line pointing Ingestion API requests at api-eu / api-in

SDK pages (13 files under docs/tracking-methods/sdks/)

• Rewrote the existing residency <Warning> next to init on JavaScript, iOS, Swift, Android, React Native, Flutter, Unity, Python, Java, Ruby, Node.js, Go, and PHP. Each now names the SDK's setting, gives both hosts, and links to that page's own EU and India sections. No sections were moved or added.

Skipped

None. Every SDK in the quickstart already documented its EU and India setting on its own page.

Also fixed two existing bugs on these pages: the Objective-C EU and India examples declared a local mixpanel and then set self.mixpanel.serverURL (now uses the local variable), and the Unity and Node.js India sections said "EU servers" (now "India servers").

How values were verified

• Every option name and host comes from the SDK's own EU and India Data Residency section in this repo.
• I cross-checked each one against the SDK source on GitHub (default branch, 2026-10-02): api_host in mixpanel-js src/mixpanel-core.js, serverURL in mixpanel-iphone Mixpanel.h, mixpanel-swift MixpanelOptions.swift, mixpanel-android MixpanelOptions.java (plus the getInstance(context, token, trackAutomaticEvents, options) overload), the mixpanel-react-native init() signature, the mixpanel-flutter README, APIHostAddress in mixpanel-unity MixpanelSettings.cs, Consumer(api_host=...) in mixpanel-python, Consumer.new endpoints in mixpanel-ruby, host in mixpanel-node and mixpanel-php, EuResidency() / InResidency() in mixpanel-go, and the 3-argument MixpanelAPI constructor in mixpanel-java.
• Ingestion hosts for the HTTP API tab come from the tables on the EU and India residency pages.

Checks run locally:

• npx mint validate: build validation passed
• npx mint broken-links: no broken links found
• scripts/check_frontmatter.py, check_code_samples.py, check_links.py, check_redirects.py: all passed
• docs.json not touched

Linear

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Project	Status	Preview	Updated
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[linear-code]

TOF-687

[greptile-apps]

Confidence Score: 5/5

[Low risk] Documentation updates for SDK configuration guidance.

The PR appears safe to merge.

_{Reviews (2) · Last reviewed commit: "Keep quickstart tracking settings in JS ..."}