Subject: Please route to API/Identity OAuth team: CH OAuth authorisation failing with generic service error
Hello Companies House team,
Please could you route this to the API / Identity OAuth support team.
We are integrating Companies House OAuth in our software and consistently hit a failure at the authorisation step.
Issue details:
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Environment: sandbox
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OAuth endpoint used: https://identity.company-information.service.gov.uk/oauth2/authorise
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Client ID: 53ca8ed6-d875-44f1-a59c-25df46c83647
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Redirect URI: https://groupbooks.ngrok.io/compliance/companies-house/oauth/callback
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Response type: code
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Scope: https://identity.company-information.service.gov.uk/user/profile.read
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State: present (base64url JSON)
Observed behaviour:
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User is redirected to identity service successfully.
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Then lands on generic CH error page:
Sorry, there is a problem with the service -
No OAuth callback error is returned to our app (error/error_description not received).
Please can you confirm:
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Whether this client ID is fully enabled/active for OAuth in sandbox.
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Whether the redirect URI above is correctly registered for this client.
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Whether the requested scope is valid for this client.
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If backend logs show the exact rejection reason for the attempted authorise request.
We can provide exact timestamps and full request query for correlation.