---
title: "Changes to Assign new custom fields to project"
method: POST
path: "/jobs-api/v3/projects/{projectId}/custom-fields"
---

# Changes to Assign new custom fields to project

`POST /jobs-api/v3/projects/{projectId}/custom-fields`

> Every recorded change to this operation, newest first.

## Timeline

Changed in 2 of 10 revisions.

- **2026-10-17** `2cd7a8215799`: 9 breaking
- **2026-08-06** `ae422098d9c5`: 1 info

## Changes

- **2026-10-17** `2cd7a8215799`: 9 breaking
  - added the pattern `^[a-z0-9]{9}$` to the `path` request parameter `projectId`
  - the response property `response/errors/items/details` became nullable for the status `400`
  - the response property `response/errors/items/details` became nullable for the status `401`
  - the response property `response/errors/items/details` became nullable for the status `429`
  - the response property `response/errors/items/details` became nullable for the status `500`
  - the response property `response/errors/items/key` became nullable for the status `400`
  - the response property `response/errors/items/key` became nullable for the status `401`
  - the response property `response/errors/items/key` became nullable for the status `429`
  - the response property `response/errors/items/key` became nullable for the status `500`
- **2026-08-06** `ae422098d9c5`: 1 info
  - endpoint added

---

[Operation](https://skmtc.dev/smartling/apis/smartling-rest-api-reference/docs/jobs-api/v3/projects/:projectId/custom-fields/post.md) - [API](https://skmtc.dev/smartling/apis/smartling-rest-api-reference.md) - [Page](https://skmtc.dev/smartling/apis/smartling-rest-api-reference/changes/jobs-api/v3/projects/:projectId/custom-fields/post)