---
title: "Create Pipeline"
method: POST
path: "/pipeline"
tags: ["pipeline"]
---

# Create Pipeline

`POST /pipeline`

Create and execute a physics agent pipeline.

At least one input source is required. When more than one is supplied,
the selected source is deterministic: `session_id` first, then
`s3_uri`, then `usd_file`. Lower-priority source fields are ignored.

## Response `202`

Successful Response

- SessionCreated — Response when session is created.
  - `session_id` string, required
  - `status` string
  - `message` string
  - `estimated_duration_minutes` integer, nullable — Estimated completion time

## Other responses

- `403` — Client S3 URI rejected by the configured bucket allowlist, or S3 access denied.
- `422` — Validation Error

## Changes

> 5 revisions in range; 1 could not be searched.

- **2026-07-21** `14f08fb85d12` — 1 breaking, 6 info
  - request property `render_backend` was restricted to a list of enum values
  - added the new `` enum value to the request property `render_backend`
  - added the new `mock` enum value to the request property `render_backend`
  - added the new `ovrtx` enum value to the request property `render_backend`
  - …3 more

[Change history](https://skmtc.dev/nvidia/apis/physics-agent-service/changes/pipeline/post.md)

---

[API](https://skmtc.dev/nvidia/apis/physics-agent-service.md) · [All operations](https://skmtc.dev/nvidia/apis/physics-agent-service/llms.txt) · [OpenAPI document](https://skmtc-service-production.skmtc.workers.dev/v1/apis/nvidia/physics-agent-service/revisions/47f3bc191c91/schema)