---
title: List namespaces in catalog
---
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[API Reference](https://developers.cloudflare.com/api)
[Basin Catalog](https://developers.cloudflare.com/api/resources/basin_catalog)
[Namespaces](https://developers.cloudflare.com/api/resources/basin_catalog/subresources/namespaces)
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# List namespaces in catalog
GET/accounts/{account\_id}/basin-catalog/{bucket\_name}/namespaces
Returns a list of namespaces in the specified Basin Catalog. Supports hierarchical filtering and pagination for efficient traversal of large namespace hierarchies.
##### Security
API Token
The preferred authorization scheme for interacting with the Cloudflare API. Create a token.
**Example:**Authorization: Bearer Sn3lZJTBX6kkg7OdcBUAxOO963GEIyGQqnFTOFYY
API Email + API Key
The previous authorization scheme for interacting with the Cloudflare API, used in conjunction with a Global API key.
**Example:**X-Auth-Email: user@example.com
The previous authorization scheme for interacting with the Cloudflare API. When possible, use API tokens instead of Global API keys.
**Example:**X-Auth-Key: 144c9defac04969c7bfad8efaa8ea194
##### Accepted Permissions (at least one required)
`Workers R2 Data Catalog Write``Workers R2 Data Catalog Read`
##### P ath ParametersExpand Collapse
account\_id: string
Use this to identify the account.
[Link to this property](<#(resource)%20basin_catalog.namespaces%20%3E%20(method)%20list%20%3E%20(params)%20default%20%3E%20(param)%20account_id%20%3E%20(schema)>)
bucket\_name: string
Specifies the R2 bucket name.
maxLength63
minLength3
[Link to this property](<#(resource)%20basin_catalog.namespaces%20%3E%20(method)%20list%20%3E%20(params)%20default%20%3E%20(param)%20bucket_name%20%3E%20(schema)>)
##### Q uery ParametersExpand Collapse
page\_size: optional number
Maximum number of namespaces to return per page. Defaults to 100, maximum 1000.
maximum1000
minimum1
[Link to this property](<#(resource)%20basin_catalog.namespaces%20%3E%20(method)%20list%20%3E%20(params)%20default%20%3E%20(param)%20page_size%20%3E%20(schema)>)
page\_token: optional string
Opaque pagination token from a previous response. Use this to fetch the next page of results.
[Link to this property](<#(resource)%20basin_catalog.namespaces%20%3E%20(method)%20list%20%3E%20(params)%20default%20%3E%20(param)%20page_token%20%3E%20(schema)>)
parent: optional string
Parent namespace to filter by. Only returns direct children of this namespace. For nested namespaces, use %1F as separator (e.g., “bronze%1Fanalytics”). Omit this parameter to list top-level namespaces.
[Link to this property](<#(resource)%20basin_catalog.namespaces%20%3E%20(method)%20list%20%3E%20(params)%20default%20%3E%20(param)%20parent%20%3E%20(schema)>)
return\_details: optional boolean
Whether to include additional metadata (timestamps). When true, response includes created\_at and updated\_at arrays.
[Link to this property](<#(resource)%20basin_catalog.namespaces%20%3E%20(method)%20list%20%3E%20(params)%20default%20%3E%20(param)%20return_details%20%3E%20(schema)>)
return\_uuids: optional boolean
Whether to include namespace UUIDs in the response. Set to true to receive the namespace\_uuids array.
[Link to this property](<#(resource)%20basin_catalog.namespaces%20%3E%20(method)%20list%20%3E%20(params)%20default%20%3E%20(param)%20return_uuids%20%3E%20(schema)>)
##### ReturnsExpand Collapse
errors: array of object {code, message }
Contains errors if the API call was unsuccessful.
code: number
Specifies the error code.
Link to this property
message: string
Describes the error.
Link to this property
[Link to this property](<#(resource)%20basin_catalog.namespaces%20%3E%20(method)%20list%20%3E%20(network%20schema)%20%3E%20(property)%20errors>)
messages: array of object {code, message }
Contains informational messages.
code: number
Specifies the message code.
Link to this property
message: string
Contains the message text.
Link to this property
[Link to this property](<#(resource)%20basin_catalog.namespaces%20%3E%20(method)%20list%20%3E%20(network%20schema)%20%3E%20(property)%20messages>)
success: boolean
Indicates whether the API call was successful.
[Link to this property](<#(resource)%20basin_catalog.namespaces%20%3E%20(method)%20list%20%3E%20(network%20schema)%20%3E%20(property)%20success>)
result: optional object {namespaces, details, namespace\_uuids, next\_page\_token }
Contains the list of namespaces with optional pagination.
namespaces: array of array of string
Lists namespaces in the catalog.
Link to this property
details: optional array of object {namespace, namespace\_uuid, created\_at, updated\_at }
Contains detailed metadata for each namespace when return\_details is true. Each object includes the namespace, UUID, and timestamps.
namespace: array of string
Specifies the hierarchical namespace parts as an array of strings. For example, \[“bronze”, “analytics”] represents the namespace “bronze.analytics”.
Link to this property
namespace\_uuid: string
Contains the UUID that persists across renames.
formatuuid
Link to this property
created\_at: optional string
Indicates the creation timestamp in ISO 8601 format.
formatdate-time
Link to this property
updated\_at: optional string
Shows the last update timestamp in ISO 8601 format. Null if never updated.
formatdate-time
Link to this property
Link to this property
namespace\_uuids: optional array of string
Contains UUIDs for each namespace when return\_uuids is true. The order corresponds to the namespaces array.
Link to this property
next\_page\_token: optional string
Use this opaque token to fetch the next page of results. A null or absent value indicates the last page.
Link to this property
[Link to this property](<#(resource)%20basin_catalog.namespaces%20%3E%20(method)%20list%20%3E%20(network%20schema)%20%3E%20(property)%20result>)
### List namespaces in catalog
HTTP
HTTPTypeScriptPythonGoTerraform
```
curl https://api.cloudflare.com/client/v4/accounts/$ACCOUNT_ID/basin-catalog/$BUCKET_NAME/namespaces \
-H "Authorization: Bearer $CLOUDFLARE_API_TOKEN"
```
200 example
```
{
"errors": [],
"messages": [],
"result": {
"details": [
{
"created_at": "2025-10-07T10:00:00Z",
"namespace": [
"bronze"
],
"namespace_uuid": "0199b999-6869-7383-bb1f-d30e059d5326",
"updated_at": "2025-10-07T12:00:00Z"
},
{
"created_at": "2025-10-07T10:15:00Z",
"namespace": [
"silver"
],
"namespace_uuid": "0199b99b-2c88-73b3-8dbb-421e0e8f2757",
"updated_at": null
},
{
"created_at": "2025-10-07T10:30:00Z",
"namespace": [
"gold"
],
"namespace_uuid": "0199b99c-3d99-73c4-9dcc-532f1f9f3868",
"updated_at": "2025-10-07T11:00:00Z"
}
],
"namespace_uuids": [
"0199b999-6869-7383-bb1f-d30e059d5326",
"0199b99b-2c88-73b3-8dbb-421e0e8f2757",
"0199b99c-3d99-73c4-9dcc-532f1f9f3868"
],
"namespaces": [
[
"bronze"
],
[
"silver"
],
[
"gold"
]
],
"next_page_token": null
},
"success": true
}
```
##### Returns Examples
200 example
```
{
"errors": [],
"messages": [],
"result": {
"details": [
{
"created_at": "2025-10-07T10:00:00Z",
"namespace": [
"bronze"
],
"namespace_uuid": "0199b999-6869-7383-bb1f-d30e059d5326",
"updated_at": "2025-10-07T12:00:00Z"
},
{
"created_at": "2025-10-07T10:15:00Z",
"namespace": [
"silver"
],
"namespace_uuid": "0199b99b-2c88-73b3-8dbb-421e0e8f2757",
"updated_at": null
},
{
"created_at": "2025-10-07T10:30:00Z",
"namespace": [
"gold"
],
"namespace_uuid": "0199b99c-3d99-73c4-9dcc-532f1f9f3868",
"updated_at": "2025-10-07T11:00:00Z"
}
],
"namespace_uuids": [
"0199b999-6869-7383-bb1f-d30e059d5326",
"0199b99b-2c88-73b3-8dbb-421e0e8f2757",
"0199b99c-3d99-73c4-9dcc-532f1f9f3868"
],
"namespaces": [
[
"bronze"
],
[
"silver"
],
[
"gold"
]
],
"next_page_token": null
},
"success": true
}
```