---
title: "Start material assignment pipeline"
method: POST
path: "/pipeline"
tags: ["pipeline"]
---

# Start material assignment pipeline

`POST /pipeline`

## Response `202`

Pipeline started

- SessionCreated
  - `session_id` string
  - `status` string
  - `message` string
  - `estimated_duration_minutes` integer, nullable

## Other responses

- `400` — Invalid input
- `413` — File too large
- `503` — Image-generation configuration is required for generated material-library mode

## Changes

- **2026-07-21** `1a8c0d4c92b5` — 6 info
  - added the new optional request property `coverage_policy`
  - added the new optional request property `enable_material_generation`
  - added the new optional request property `layer_only`
  - added the new optional request property `material_generation_guidance`
  - …2 more
- **2026-05-27** `5738430233e4` — 12 info
  - added the new optional request property `cluster_embedding_backend`
  - added the new optional request property `cluster_embedding_base_url`
  - added the new optional request property `cluster_embedding_batch_size`
  - added the new optional request property `cluster_embedding_max_workers`
  - …8 more
- **2026-04-30** `06140a1ddac1` — 1 info
  - added the new optional request property `render_num_workers`
- **2026-04-29** `790a7e8ac4e2` — 13 warning
  - removed the request property `cluster_embedding_backend`
  - removed the request property `cluster_embedding_base_url`
  - removed the request property `cluster_embedding_batch_size`
  - removed the request property `cluster_embedding_max_workers`
  - …9 more

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

---

[API](https://skmtc.dev/nvidia/apis/material-agent-service.md) · [All operations](https://skmtc.dev/nvidia/apis/material-agent-service/llms.txt) · [OpenAPI document](https://skmtc-service-production.skmtc.workers.dev/v1/apis/nvidia/material-agent-service/revisions/4fde0c1362b3/schema)