---
title: "Op Create"
method: POST
path: "/v2/{entity}/{project}/ops"
tags: ["Ops"]
---

# Op Create

`POST /v2/{entity}/{project}/ops`

## Request

- Base URL: `https://trace.wandb.ai` (the document declares no server; this is the origin it was published from)
- URL: `https://trace.wandb.ai/v2/{entity}/{project}/ops`
- Auth: none declared

Create an op object.

## Path parameters

- `entity` string, required
- `project` string, required

## Request body

- OpCreateBody: Request body for creating an Op object via REST API. This model excludes project_id since it comes from the URL path in RESTful endpoints.
  - `name` string, nullable: The name of this op. Ops with the same name will be versioned together.
  - `source_code` string, nullable: Complete source code for this op, including imports

## Response `200`

Successful Response

- OpCreateRes: Response model for creating an Op object.
  - `digest` string, required: The digest of the created op
  - `object_id` string, required: The ID of the created op
  - `version_index` integer, required: The version index of the created op

## Other responses

- `422`: Validation Error

## Changes

- **2026-10-16** `dd89fadfe4e4`: 3 info
  - the endpoint scheme security `HTTPBasic` was removed from the API
  - added the optional property `detail/items/ctx` to the response with the `422` status
  - added the optional property `detail/items/input` to the response with the `422` status
- **2026-02-02** `56745769989b`: 1 info
  - endpoint added
- **2026-01-07** `3758bf263a5e`: 1 breaking
  - api path removed without deprecation
- **2026-01-07** `d6e39f7c717d`: 1 info
  - api operation id `op_create` removed and replaced with `op_create_v2__entity___project__ops_post`
- **2025-11-14** `e444bf379e61`: 1 info
  - endpoint added

[Operation history](https://skmtc.dev/wandb/apis/weights-biases-weave-stainless-api/changes/v2/:entity/:project/ops/post.md)

---

[API](https://skmtc.dev/wandb/apis/weights-biases-weave-stainless-api.md) - [All operations](https://skmtc.dev/wandb/apis/weights-biases-weave-stainless-api/llms.txt) - [OpenAPI document](https://skmtc.dev/wandb/apis/weights-biases-weave-stainless-api/revisions/f7643c49bf2e?raw)