---
title: "Create a case link"
method: POST
path: "/api/v2/cases/link"
tags: ["Case Management"]
---

# Create a case link

`POST /api/v2/cases/link`

Creates a directional link between two cases (for example, case A blocks case B). The parent and child cases and their relationship type must be specified.

## Request body

- CaseLinkCreateRequest — Request payload for creating a link between two entities.
  - `data` CaseLinkCreate, required — Data object for creating a case link.
    - `attributes` CaseLinkAttributes, required — Attributes describing a directional relationship between two entities (cases, incidents, or pages).
      - `child_entity_id` string, required — The UUID of the child (target) entity in the relationship.
      - `child_entity_type` string, required — The type of the child entity. Allowed values: `CASE`, `INCIDENT`, `PAGE`, `AGENT_CONVERSATION`.
      - `parent_entity_id` string, required — The UUID of the parent (source) entity in the relationship.
      - `parent_entity_type` string, required — The type of the parent entity. Allowed values: `CASE`, `INCIDENT`, `PAGE`, `AGENT_CONVERSATION`.
      - `relationship` string, required — The type of directional relationship. Allowed values: `RELATES_TO` (bidirectional association), `CAUSES` (parent causes child), `BLOCKS` (parent blocks child), `DUPLICATES` (parent duplicates child), `PARENT_OF` (hierarchical), `SUCCESSOR_OF` (sequence), `ESCALATES_TO` (priority escalation).
    - `type` 'link', required — JSON:API resource type for case links.

## Response `201`

Created

- CaseLinkResponse — Response containing a single case link.
  - `data` CaseLink, required — A directional link representing a relationship between two entities. At least one entity must be a case.
    - `attributes` CaseLinkAttributes, required — Attributes describing a directional relationship between two entities (cases, incidents, or pages).
      - `child_entity_id` string, required — The UUID of the child (target) entity in the relationship.
      - `child_entity_type` string, required — The type of the child entity. Allowed values: `CASE`, `INCIDENT`, `PAGE`, `AGENT_CONVERSATION`.
      - `parent_entity_id` string, required — The UUID of the parent (source) entity in the relationship.
      - `parent_entity_type` string, required — The type of the parent entity. Allowed values: `CASE`, `INCIDENT`, `PAGE`, `AGENT_CONVERSATION`.
      - `relationship` string, required — The type of directional relationship. Allowed values: `RELATES_TO` (bidirectional association), `CAUSES` (parent causes child), `BLOCKS` (parent blocks child), `DUPLICATES` (parent duplicates child), `PARENT_OF` (hierarchical), `SUCCESSOR_OF` (sequence), `ESCALATES_TO` (priority escalation).
    - `id` string, required — The case link identifier.
    - `type` 'link', required — JSON:API resource type for case links.

## Other responses

- `400` — Bad Request
- `401` — Unauthorized
- `403` — Forbidden
- `404` — Not Found
- `429` — Too many requests

---

[API](https://skmtc.net/datadog/apis/api-v2.md) · [All operations](https://skmtc.net/datadog/apis/api-v2/llms.txt) · [OpenAPI document](https://skmtc-service-staging.skmtc.workers.dev/v1/apis/datadog/api-v2/versions/da68bf029e4c/schema)