```
public interface OAuth2ParameterNames
```
Standard and custom (non-standard) parameter names defined in the OAuth Parameters Registry and used by the authorization endpoint, token endpoint and token revocation endpoint.

Since:

5.0

See Also:

11.2 OAuth Parameters Registry

Field Summary

Fields
Modifier and Type	Field	Description
`static java.lang.String`	`ACCESS_TOKEN`	`access_token` - used in Authorization Response and Access Token Response.
`static java.lang.String`	`ASSERTION`	`assertion` - used in Access Token Request.
`static java.lang.String`	`CLIENT_ASSERTION`	`client_assertion` - used in Access Token Request.
`static java.lang.String`	`CLIENT_ASSERTION_TYPE`	`client_assertion_type` - used in Access Token Request.
`static java.lang.String`	`CLIENT_ID`	`client_id` - used in Authorization Request and Access Token Request.
`static java.lang.String`	`CLIENT_SECRET`	`client_secret` - used in Access Token Request.
`static java.lang.String`	`CODE`	`code` - used in Authorization Response and Access Token Request.
`static java.lang.String`	`ERROR`	`error` - used in Authorization Response and Access Token Response.
`static java.lang.String`	`ERROR_DESCRIPTION`	`error_description` - used in Authorization Response and Access Token Response.
`static java.lang.String`	`ERROR_URI`	`error_uri` - used in Authorization Response and Access Token Response.
`static java.lang.String`	`EXPIRES_IN`	`expires_in` - used in Authorization Response and Access Token Response.
`static java.lang.String`	`GRANT_TYPE`	`grant_type` - used in Access Token Request.
`static java.lang.String`	`PASSWORD`	`password` - used in Access Token Request.
`static java.lang.String`	`REDIRECT_URI`	`redirect_uri` - used in Authorization Request and Access Token Request.
`static java.lang.String`	`REFRESH_TOKEN`	`refresh_token` - used in Access Token Request and Access Token Response.
`static java.lang.String`	`REGISTRATION_ID`	Non-standard parameter (used internally).
`static java.lang.String`	`RESPONSE_TYPE`	`response_type` - used in Authorization Request.
`static java.lang.String`	`SCOPE`	`scope` - used in Authorization Request, Authorization Response, Access Token Request and Access Token Response.
`static java.lang.String`	`STATE`	`state` - used in Authorization Request and Authorization Response.
`static java.lang.String`	`TOKEN`	`token` - used in Token Revocation Request.
`static java.lang.String`	`TOKEN_TYPE`	`token_type` - used in Authorization Response and Access Token Response.
`static java.lang.String`	`TOKEN_TYPE_HINT`	`token_type_hint` - used in Token Revocation Request.
`static java.lang.String`	`USERNAME`	`username` - used in Access Token Request.

- Field Detail
  - GRANT_TYPE
```
static final java.lang.String GRANT_TYPE
```
    grant_type - used in Access Token Request.
    
    See Also:
    
    Constant Field Values
  - RESPONSE_TYPE
```
static final java.lang.String RESPONSE_TYPE
```
    response_type - used in Authorization Request.
    
    See Also:
    
    Constant Field Values
  - CLIENT_ID
```
static final java.lang.String CLIENT_ID
```
    client_id - used in Authorization Request and Access Token Request.
    
    See Also:
    
    Constant Field Values
  - CLIENT_SECRET
```
static final java.lang.String CLIENT_SECRET
```
    client_secret - used in Access Token Request.
    
    See Also:
    
    Constant Field Values
  - CLIENT_ASSERTION_TYPE
```
static final java.lang.String CLIENT_ASSERTION_TYPE
```
    client_assertion_type - used in Access Token Request.
    
    Since:
    
    5.5
    
    See Also:
    
    Constant Field Values
  - CLIENT_ASSERTION
```
static final java.lang.String CLIENT_ASSERTION
```
    client_assertion - used in Access Token Request.
    
    Since:
    
    5.5
    
    See Also:
    
    Constant Field Values
  - ASSERTION
```
static final java.lang.String ASSERTION
```
    assertion - used in Access Token Request.
    
    Since:
    
    5.5
    
    See Also:
    
    Constant Field Values
  - REDIRECT_URI
```
static final java.lang.String REDIRECT_URI
```
    redirect_uri - used in Authorization Request and Access Token Request.
    
    See Also:
    
    Constant Field Values
  - SCOPE
```
static final java.lang.String SCOPE
```
    scope - used in Authorization Request, Authorization Response, Access Token Request and Access Token Response.
    
    See Also:
    
    Constant Field Values
  - STATE
```
static final java.lang.String STATE
```
    state - used in Authorization Request and Authorization Response.
    
    See Also:
    
    Constant Field Values
  - CODE
```
static final java.lang.String CODE
```
    code - used in Authorization Response and Access Token Request.
    
    See Also:
    
    Constant Field Values
  - ACCESS_TOKEN
```
static final java.lang.String ACCESS_TOKEN
```
    access_token - used in Authorization Response and Access Token Response.
    
    See Also:
    
    Constant Field Values
  - TOKEN_TYPE
```
static final java.lang.String TOKEN_TYPE
```
    token_type - used in Authorization Response and Access Token Response.
    
    See Also:
    
    Constant Field Values
  - EXPIRES_IN
```
static final java.lang.String EXPIRES_IN
```
    expires_in - used in Authorization Response and Access Token Response.
    
    See Also:
    
    Constant Field Values
  - REFRESH_TOKEN
```
static final java.lang.String REFRESH_TOKEN
```
    refresh_token - used in Access Token Request and Access Token Response.
    
    See Also:
    
    Constant Field Values
  - USERNAME
```
static final java.lang.String USERNAME
```
    username - used in Access Token Request.
    
    See Also:
    
    Constant Field Values
  - PASSWORD
```
static final java.lang.String PASSWORD
```
    password - used in Access Token Request.
    
    See Also:
    
    Constant Field Values
  - ERROR
```
static final java.lang.String ERROR
```
    error - used in Authorization Response and Access Token Response.
    
    See Also:
    
    Constant Field Values
  - ERROR_DESCRIPTION
```
static final java.lang.String ERROR_DESCRIPTION
```
    error_description - used in Authorization Response and Access Token Response.
    
    See Also:
    
    Constant Field Values
  - ERROR_URI
```
static final java.lang.String ERROR_URI
```
    error_uri - used in Authorization Response and Access Token Response.
    
    See Also:
    
    Constant Field Values
  - REGISTRATION_ID
```
static final java.lang.String REGISTRATION_ID
```
    Non-standard parameter (used internally).
    
    See Also:
    
    Constant Field Values
  - TOKEN
```
static final java.lang.String TOKEN
```
    token - used in Token Revocation Request.
    
    Since:
    
    5.5
    
    See Also:
    
    Constant Field Values
  - TOKEN_TYPE_HINT
```
static final java.lang.String TOKEN_TYPE_HINT
```
    token_type_hint - used in Token Revocation Request.
    
    Since:
    
    5.5
    
    See Also:
    
    Constant Field Values

Interface OAuth2ParameterNames

Field Summary

Field Detail

GRANT_TYPE

RESPONSE_TYPE

CLIENT_ID

CLIENT_SECRET

CLIENT_ASSERTION_TYPE

CLIENT_ASSERTION

ASSERTION

REDIRECT_URI

SCOPE

STATE

CODE

ACCESS_TOKEN

TOKEN_TYPE

EXPIRES_IN

REFRESH_TOKEN

USERNAME

PASSWORD

ERROR

ERROR_DESCRIPTION

ERROR_URI

REGISTRATION_ID

TOKEN

TOKEN_TYPE_HINT