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Versioning

Path prefixes follow the upstream APIs. There is no Accept-Version header.

Path prefixes

The gateway is a stable public surface. It keeps the version that each product API already uses:

Prefix	Product
`/api/v1/...`	Authentication, profile, MFA, company admin
`/api/v4/...`	Electronic signature
`/api/workflows`, `/api/clients`, `/api/users`, `/api/roles`	Workflows and directory
`/api/contacts`, `/api/edm`, `/api/ai`, `/api/logs-audit`	Contacts, vault, AI, audit
`/api/verification`	Signature verification

Compatibility

Additive changes (new optional fields, new endpoints) can appear without a new prefix. Breaking changes get a new path. Pin your integration to the paths documented here and ignore unknown JSON properties.