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A third-party low-code integration tool (like Crosser) gets a 401 Unauthorized calling a standard (non-integration) IFS projection with the same IAM client/credentials that work fine in Postman and against integration projections.

Answer

Adding an IEEE754Compatible=true header to the request has resolved this specific 401 behavior for at least one universal-connector integration tool calling standard projections — if a tool authenticates successfully against integration-type projections but fails specifically against standard projections with the same credentials, this header is worth trying before assuming a deeper IAM/client configuration problem.

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