# Type management

Read Units

## Retrieving all unit types

> Retrieves list of all unit types present in the database.

```json
{"openapi":"3.0.0","info":{"title":"Unit Handling Service","version":"0.0.1"},"tags":[{"name":"Type management","description":"Read Units"}],"servers":[{"url":"https://api.emporix.io"}],"security":[{"OAuth2":[]}],"components":{"securitySchemes":{"OAuth2":{"type":"oauth2","flows":{"clientCredentials":{"tokenUrl":"https://api.emporix.io/oauth/token","scopes":{"unithandling.unit_manage":"Needed to manage measurement units."}}}}},"parameters":{"tenant-path":{"in":"path","name":"tenant","required":true,"description":"The tenant name.","schema":{"type":"string"}}},"responses":{"UnauthorizedResponse401":{"description":"Given request is unauthorized - the authorization token is invalid or has expired.\n\nDetails will be provided in the response payload.","content":{"application/json":{"schema":{"$ref":"#/components/schemas/Unauthorized401"}}}},"ServerErrorResponse500":{"description":"Unexpected server error","content":{"application/json":{"schema":{"$ref":"#/components/schemas/UnexpectedError"}}}}},"schemas":{"Unauthorized401":{"properties":{"fault":{"type":"object","properties":{"faultstring":{"type":"string"},"detail":{"type":"object","properties":{"errorcode":{"type":"string"}}}}}}},"UnexpectedError":{"properties":{"code":{"type":"integer","description":"HTTP Status Code."},"status":{"type":"string","description":"HTTP Status."},"message":{"type":"string","description":"Detailed error message"}}}}},"paths":{"/unit-handling/{tenant}/types":{"get":{"tags":["Type management"],"summary":"Retrieving all unit types","description":"Retrieves list of all unit types present in the database.","parameters":[{"$ref":"#/components/parameters/tenant-path"}],"responses":{"200":{"description":"All unit types retrieved successfully.","content":{"application/json":{"schema":{"type":"array","items":{"type":"string"}}}}},"401":{"$ref":"#/components/responses/UnauthorizedResponse401"},"500":{"$ref":"#/components/responses/ServerErrorResponse500"}},"operationId":"GET-unit-handling-list-all-unit-types"}}}}
```