--- title: Create a case link description: Datadog, the leading service for cloud-scale monitoring. breadcrumbs: Docs > API Reference > Case Management --- # Create a case link{% #create-a-case-link %} Copy pageCopied {% tab title="v2" %} **Note**: This endpoint is in preview and is subject to change. If you have any feedback, contact [Datadog support](https://docs.datadoghq.com/help/). | Datadog site | API endpoint | | ----------------- | ---------------------------------------------------- | | ap1.datadoghq.com | POST https://api.ap1.datadoghq.com/api/v2/cases/link | | ap2.datadoghq.com | POST https://api.ap2.datadoghq.com/api/v2/cases/link | | app.datadoghq.eu | POST https://api.datadoghq.eu/api/v2/cases/link | | app.ddog-gov.com | POST https://api.ddog-gov.com/api/v2/cases/link | | us2.ddog-gov.com | POST https://api.us2.ddog-gov.com/api/v2/cases/link | | app.datadoghq.com | POST https://api.datadoghq.com/api/v2/cases/link | | us3.datadoghq.com | POST https://api.us3.datadoghq.com/api/v2/cases/link | | us5.datadoghq.com | POST https://api.us5.datadoghq.com/api/v2/cases/link | ### Overview 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. OAuth apps require the `cases_write` authorization [scope](https://docs.datadoghq.com/api/latest/scopes.md#case-management) to access this endpoint. ### Request #### Body Data (required) Case link create request. {% tab title="Model" %} | Parent field | Field | Type | Description | | ------------ | ------------------------------------ | ------ | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | | | data [*required*] | object | Data object for creating a case link. | | data | attributes [*required*] | object | Attributes describing a directional relationship between two entities (cases, incidents, or pages). | | attributes | child_entity_id [*required*] | string | The UUID of the child (target) entity in the relationship. | | attributes | child_entity_type [*required*] | string | The type of the child entity. Allowed values: `CASE`, `INCIDENT`, `PAGE`, `AGENT_CONVERSATION`. | | attributes | parent_entity_id [*required*] | string | The UUID of the parent (source) entity in the relationship. | | attributes | parent_entity_type [*required*] | string | The type of the parent entity. Allowed values: `CASE`, `INCIDENT`, `PAGE`, `AGENT_CONVERSATION`. | | attributes | relationship [*required*] | string | 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). | | data | type [*required*] | enum | JSON:API resource type for case links. Allowed enum values: `link` | {% /tab %} {% tab title="Example" %} ```json { "data": { "attributes": { "child_entity_id": "4417921d-0866-4a38-822c-6f2a0f65f77d", "child_entity_type": "CASE", "parent_entity_id": "bf0cbac6-4c16-4cfb-b6bf-ca5e0ec37a4f", "parent_entity_type": "CASE", "relationship": "BLOCKS" }, "type": "link" } } ``` {% /tab %} ### Response {% tab title="201" %} Created {% tab title="Model" %} Response containing a single case link. | Parent field | Field | Type | Description | | ------------ | ------------------------------------ | ------ | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | | | data [*required*] | object | A directional link representing a relationship between two entities. At least one entity must be a case. | | data | attributes [*required*] | object | Attributes describing a directional relationship between two entities (cases, incidents, or pages). | | attributes | child_entity_id [*required*] | string | The UUID of the child (target) entity in the relationship. | | attributes | child_entity_type [*required*] | string | The type of the child entity. Allowed values: `CASE`, `INCIDENT`, `PAGE`, `AGENT_CONVERSATION`. | | attributes | parent_entity_id [*required*] | string | The UUID of the parent (source) entity in the relationship. | | attributes | parent_entity_type [*required*] | string | The type of the parent entity. Allowed values: `CASE`, `INCIDENT`, `PAGE`, `AGENT_CONVERSATION`. | | attributes | relationship [*required*] | string | 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). | | data | id [*required*] | string | The case link identifier. | | data | type [*required*] | enum | JSON:API resource type for case links. Allowed enum values: `link` | {% /tab %} {% tab title="Example" %} ```json { "data": { "attributes": { "child_entity_id": "4417921d-0866-4a38-822c-6f2a0f65f77d", "child_entity_type": "CASE", "parent_entity_id": "bf0cbac6-4c16-4cfb-b6bf-ca5e0ec37a4f", "parent_entity_type": "CASE", "relationship": "BLOCKS" }, "id": "804cd682-55f6-4541-ab00-b608b282ea7d", "type": "link" } } ``` {% /tab %} {% /tab %} {% tab title="400" %} Bad Request {% tab title="Model" %} API error response. | Field | Type | Description | | ------------------------ | -------- | ----------------- | | errors [*required*] | [string] | A list of errors. | {% /tab %} {% tab title="Example" %} ```json { "errors": [ "Bad Request" ] } ``` {% /tab %} {% /tab %} {% tab title="401" %} Unauthorized {% tab title="Model" %} API error response. | Field | Type | Description | | ------------------------ | -------- | ----------------- | | errors [*required*] | [string] | A list of errors. | {% /tab %} {% tab title="Example" %} ```json { "errors": [ "Bad Request" ] } ``` {% /tab %} {% /tab %} {% tab title="403" %} Forbidden {% tab title="Model" %} API error response. | Field | Type | Description | | ------------------------ | -------- | ----------------- | | errors [*required*] | [string] | A list of errors. | {% /tab %} {% tab title="Example" %} ```json { "errors": [ "Bad Request" ] } ``` {% /tab %} {% /tab %} {% tab title="404" %} Not Found {% tab title="Model" %} API error response. | Field | Type | Description | | ------------------------ | -------- | ----------------- | | errors [*required*] | [string] | A list of errors. | {% /tab %} {% tab title="Example" %} ```json { "errors": [ "Bad Request" ] } ``` {% /tab %} {% /tab %} {% tab title="429" %} Too many requests {% tab title="Model" %} API error response. | Field | Type | Description | | ------------------------ | -------- | ----------------- | | errors [*required*] | [string] | A list of errors. | {% /tab %} {% tab title="Example" %} ```json { "errors": [ "Bad Request" ] } ``` {% /tab %} {% /tab %} ### Code Example ##### \## default # \# Curl command curl -X POST "https://api.datadoghq.com/api/v2/cases/link" \ -H "Accept: application/json" \ -H "Content-Type: application/json" \ -H "DD-API-KEY: ${DD_API_KEY}" \ -H "DD-APPLICATION-KEY: ${DD_APP_KEY}" \ -d @- << EOF { "data": { "attributes": { "child_entity_id": "4417921d-0866-4a38-822c-6f2a0f65f77d", "child_entity_type": "CASE", "parent_entity_id": "bf0cbac6-4c16-4cfb-b6bf-ca5e0ec37a4f", "parent_entity_type": "CASE", "relationship": "BLOCKS" }, "type": "link" } } EOF {% /tab %}