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[Developer resources](/developers)› Deprecation policy

# Proquiro API Deprecation Policy

This page is the canonical statement of how the Proquiro Public API is versioned and how deprecations are signalled. Agents and integrators can rely on it: nothing documented in the [OpenAPI spec](/api/openapi.json)changes behavior without a versioned replacement and the notice period below.

## Versioning scheme

- The API is versioned in the **URL path**. The current version is`v1`: `/api/v1/demo-request` and `/api/v1/health`.
- The unversioned `/api/*` paths are **permanently supported aliases** of `v1` and will never change behavior.
- Within a version, changes are **additive only**: request shape, response shape, and error codes are never removed or repurposed.
- **Breaking changes only ship in a new path version**(`/api/v2/*`), alongside the old one.

## How deprecation is signalled

A deprecated endpoint keeps working for at least **6 months** after the deprecation is announced. During that window it is signalled machine-readably on every response:

- A `Deprecation` response header (per the IETF deprecation-header standard) from the moment the deprecation is announced.
- A `Sunset` response header (RFC 8594) carrying the retirement date once one is scheduled — never less than 6 months out.
- `deprecated: true` on the affected operations in the[OpenAPI spec](/api/openapi.json), with the replacement operation named in the description.
- An entry on the [product updates changelog](/product-updates) announcing the deprecation and its replacement.

After the sunset date, retired endpoints return `410 Gone` with the standard[structured JSON error](/developers#proquiro-errors) pointing at the replacement — never a silent behavior change.

## Currently deprecated endpoints

**None.** No Proquiro Public API endpoint is deprecated or scheduled for sunset. When that changes, this page and the signals above are updated first.

## Questions

See the [versioning summary](/developers#proquiro-versioning) on the developer hub, or [contact the team](/contact) for partner integration timelines.