---
title: "Create Relationship"
method: POST
path: "/v1/access-control/relationships"
tags: ["v1", "protected", "access-control"]
---

# Create Relationship

`POST /v1/access-control/relationships`

Grant a resource-ownership relation via the configured graph backend.

## Request body

- RelationshipWriteRequest
  - `namespace` string, required
  - `object` string, required
  - `relation` string, required
  - `subject_id` string, nullable
  - `subject_set` SubjectSetBody
    - `namespace` string, required
    - `object` string, required
    - `relation` string, required

## Response `201`

Successful Response

- object

## Other responses

- `422` — Validation Error

## Changes

> 19 revisions in range; 6 could not be searched.

- **2026-06-18** `dad98bb65260` — 1 info
  - endpoint added
- **2026-03-30** `e9c153221160` — 1 breaking
  - api path removed without deprecation

[Change history](https://skmtc.dev/agentarea/apis/agentarea-api/changes/v1/access-control/relationships/post.md)

---

[API](https://skmtc.dev/agentarea/apis/agentarea-api.md) · [All operations](https://skmtc.dev/agentarea/apis/agentarea-api/llms.txt) · [OpenAPI document](https://skmtc-service-production.skmtc.workers.dev/v1/apis/agentarea/agentarea-api/revisions/ac18f7025c00/schema)