Call the endpoint for the data center assigned to your developer account, as shown in Control Board → Basic Information → My Information. Current international documentation maps East Asia to openapi-sg.easy4ip.com, Central Europe to openapi-fk.easy4ip.com, and Western America to openapi-or.easy4ip.com. The China endpoint openapi.lechange.cn is separate. These mappings do not, by themselves, prove data residency.
Why the assigned center wins
The development specification tells developers to select the access domain based on the data center to which the account belongs. This is an account assignment, not a latency contest in application code. Choosing a geographically familiar hostname while ignoring the console assignment can produce authentication or resource lookup failures.
Current international mapping
For HTTPS POST requests, the current page lists East Asia as https://openapi-sg.easy4ip.com:443/openapi/[method], Central Europe as https://openapi-fk.easy4ip.com:443/openapi/[method], and Western America as https://openapi-or.easy4ip.com:443/openapi/[method]. Preserve the /openapi/[method] path and use the method name documented for the call.
Console assignment workflow
- Sign in to the same international developer account that owns the application. 2. Open Control Board. 3. Navigate to Basic Information and My Information. 4. Record the displayed data center. 5. Map it to the documented hostname. 6. Configure that value server-side. 7. Run a signed test call and retain the request ID and redacted result.
Keep China separate
The international specification above lists SG, FK, and OR. The China platform uses openapi.lechange.cn and a separate regional context. Do not silently fall back between international and China endpoints, mix portal credentials, or write one global endpoint selector that guesses from end-user IP address.
Recommended configuration
Architecture recommendation: bind each application credential set to one explicit region enum and base URL in secret-backed configuration. Reject an unknown value at startup. Do not allow a browser or end user to choose the OpenAPI hostname. If the product legitimately operates multiple developer applications, keep credentials, region, quotas, and logs partitioned.
Troubleshooting a mismatch
Verify portal, App ID, App Secret, assigned data center, hostname, UTC time, and method path as separate checks. A signature that is mathematically correct can still be sent to the wrong region. Capture the request ID and result code, but redact secrets before sharing. Do not rotate credentials until configuration mismatch has been ruled out.
What this FAQ does not claim
A service endpoint label is not a contractual statement about storage location, replication, failover, compliance scope, or disaster recovery. This article makes no data-residency or SLA claim. Obtain contractual and compliance answers through the appropriate Imou business and legal channels rather than inferring them from DNS names.
Soft CTA
Create and inspect an application at Imou Open Platform, then save its assigned data center alongside its server-side credentials. The Open Platform provides regional API access; your deployment must route each credential set consistently.
Verification discipline
Treat the linked live documentation as the boundary of the claim. Capture the page and review date in the release ticket, and recheck method names, fields, permissions, regions, and status values before publication. Console behavior and repositories can change after this draft. If the live source disagrees with this article, update the article rather than preserving an outdated assertion.
Secret handling
Keep App Secret values and administrator access tokens on a trusted backend. Do not place them in Home Assistant YAML shared publicly, browser bundles, mobile logs, screenshots, sample repositories, or support tickets. Redact device identifiers and live addresses in diagnostics. A live URL is operational data and should be distributed only through the authorization boundary designed by the application owner.
Capability and service boundaries
A documented platform method does not prove that every device, channel, account, or subscribed service supports the same outcome. Test with the actual account region and target device family. Present missing controls as a capability or service question first, then gather diagnostics, instead of promising universal behavior or inventing a model matrix.
Observability
Record the request ID, method, region, result code, and a redacted resource identifier for backend calls. Add timestamps around each stage so operators can distinguish local validation, platform rejection, device availability, and downstream delivery. Logs must never contain App Secret values, full administrator tokens, reusable live URLs, or unredacted callback payloads.
Rollout practice
Start with one test application, one account region, one device, and one channel. Validate the happy path and an intentional failure before expanding. A staged rollout makes region mistakes, quota pressure, unsupported capabilities, and stale credentials visible while the affected inventory is still small.
Architecture status
Unless a sentence is explicitly attributed to Imou or Home Assistant documentation, workflow choices in this article are recommendations, not platform guarantees. Queue design, caching, reconciliation, alert thresholds, and retry policy belong to the application operator. They should be tuned from measured behavior without being presented as an Imou SLA.
Official sources
Live-source review date: 2026-08-31. Recheck before publication.
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