> ## Documentation Index
> Fetch the complete documentation index at: https://docs.paypathiq.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Versioning and deprecation

> Understand PayPathIQ API compatibility and migration commitments.

The `/v1` path versions the shared API mechanics and Receivables core. Your Integration grant fixes the `credit_union.v1` profile; you cannot select a profile in a request.

Optional response fields may be added without a new API version. Breaking core changes require `/v2`. Breaking credit-union profile changes require `credit_union.v2`.

## Support period

PayPathIQ supports a breaking version for at least 12 months after its replacement is generally available. A security or legal requirement may require a shorter transition.

## Deprecation notice

For a planned breaking change, PayPathIQ publishes a dated changelog and migration guide. It also notifies the named Integration technical contact directly. API responses use the standard `Deprecation` and `Sunset` headers and link to the migration guidance.

Keep a current technical contact with your PayPathIQ Integration administrator so your team receives deprecation notices.