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Deprecated, no dateSubscribe to OpenCorporates APIShare

OpenCorporates API has deprecated the incorporated_since query parameter on the GET /v0.4/companies/search endpoint without specifying a shutdown date. This parameter was used to restrict results to companies with an incorporation_date after a specified date. Requests that continue to use this parameter will eventually fail once it is fully removed.

Calls it hits

GET /v0.4/companies/search
query parameter incorporated_since

What to use instead of these calls

Use the incorporation_date date filter instead by formatting the request as incorporation_date=YYYY-MM-DD:.

In OpenCorporates API's words

Deprecated Restrict to companies with an incorporation_date after the given date

OpenCorporates API, Announcement

Facts

API: OpenCorporates API api.opencorporates.com
Kind: Parameter removal
Takes effect: No date given yet
Calls after that day: Fail
Source: Announcement
Last updated: October 25, 2026
Verified: November 6, 2026, against OpenCorporates API's own pages

Questions

When does this change take effect?

OpenCorporates API deprecated GET /v0.4/companies/search, query parameter incorporated_since without giving a shutdown date yet.

Do these calls still work?

Yes, they still work: OpenCorporates API has not given a shutdown date yet.

How do I find the calls this hits in my code?

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