> ## Documentation Index > Fetch the complete documentation index at: https://docs.illumiatech.com/llms.txt > Use this file to discover all available pages before exploring further. # List Credential Value Types > Lists the credential value types. Query parameters can be used to limit the scope of the list. ## OpenAPI ````yaml /api-reference/idx/atlas-spec-instmgmt-credential/1.0/idx-instmgmt-credential.json get /credentialvalues/types openapi: 3.0.3 info: title: Institution Management Credential API - 1.0 version: '1.0' description: Credential operations available for institution integration. contact: name: Transact Campus url: https://www.transactcampus.com/ email: no-reply@transactcampus.com termsOfService: TBD license: name: ISC url: https://www.transactcampus.com servers: - url: https://api.transactcampus.com/idx/institution-management/credentials/v1 description: Prod - description: UAT url: https://api-uat.transactsp.net/idx/institution-management/credentials/v1 security: - ApimKey: [] tags: - name: Credential description: The credential tag - name: Credential Type description: The credential type tag - name: Credential Value Pool description: The credential value pool tag - name: Credential Value Type description: The credential value type tag paths: /credentialvalues/types: get: tags: - Credential Value Type summary: List Credential Value Types description: >- Lists the credential value types. Query parameters can be used to limit the scope of the list. operationId: list-credential-value-types parameters: - $ref: '#/components/parameters/limit-query-param' - $ref: '#/components/parameters/offset-query-param' responses: '200': description: The list of credential value types. content: application/json: schema: type: object additionalProperties: false properties: credentialValueTypes: type: array items: $ref: '#/components/schemas/credential-value-type-model' paging: $ref: '#/components/schemas/paging-model' required: - credentialValueTypes - paging '400': $ref: '#/components/responses/error-response' '401': $ref: '#/components/responses/error-response' '403': $ref: '#/components/responses/error-response' '429': $ref: '#/components/responses/error-response' '500': $ref: '#/components/responses/500-error-response' components: parameters: limit-query-param: name: limit in: query description: The limit parameter for pagination. schema: minimum: 1 type: integer format: int32 default: 50 style: form explode: false offset-query-param: name: offset in: query description: The offset parameter for pagination. schema: minimum: 0 type: integer format: int32 default: 0 style: form explode: false schemas: credential-value-type-model: title: Credential Value Type type: object additionalProperties: false description: The credential value type model. properties: id: type: string description: The credential value type identifier in UUID format. format: uuid name: maxLength: 20 type: string description: >- The credential value type name. Must be unique for the institution. The name cannot be any of the following `Mobile IIN`, `Transact Virtual` internalNotes: type: string description: Notes that describe what the credential value represents. adminUserHint: type: string description: Hint for the admin UI. consumerUserHint: type: string description: Hint for the consumer UI. mediaTypeDescriptors: type: array description: The media type descriptors allowed for the credential value. uniqueItems: true minItems: 0 items: type: string enum: - BARCODE - BIOMETRIC - HANDENTRY - MAGSTRIPE - NFC - PROXIMITY - OTHER issuanceType: $ref: '#/components/schemas/credential-value-issuance-type-enum' prefix: type: string description: >- The prefix that must be present in the credential value. It must conform to the character set. If the IIN identifier is set, the prefix will default to the IIN value. If the character set is GUID, then this cannot be set. Providing a prefix that does not match the value of the IIN will result in an error. iinId: type: string description: >- The institution IIN range identifier in UUID format. If the character set is GUID, then this cannot be set. format: uuid characterSet: type: string description: >- The allowed character set of a credential value. If the issuance type is set to IIN, the character set must be numeric. If the characterSet field is set to ALPHANUMERIC or GUID, then the luhnCheckRequired field must be set to false. The alphanumeric set can contain upper and lowercase letters, numbers, and underscores. enum: - ALPHANUMERIC - NUMERIC - GUID minLength: type: integer minimum: 1 maximum: 255 description: >- The minimum length allowed for the credential value. If the issuance type is IIN, the minimum length must be between 10 and 19. Must be less than or equal to the maximum length. If characterSet is GUID, then this must be 36 and will default to 36 if not provided. maxLength: type: integer minimum: 1 maximum: 255 description: >- The maximum length allowed for the credential value. If the issuance type is IIN, the maximum length must be between 10 and 19. Must be greater than or equal to the minimum length. If characterSet is GUID, then this must be 36 and will default to 36 if not provided. allowReissuance: type: boolean description: Determines whether the credential value can be reissued. luhnCheckRequired: type: boolean description: >- Indicates if the credential value should be validated by the Luhn algorithm. Credential values can only be validated by the Luhn algorithm if they are numeric. If character set is ALPHANUMERIC or GUID, then this will default to false. issueNumberRequired: type: boolean description: >- Indicates if an issue number should be expected in the credential value. If issueNumberRequired is set to true, then issueNumberLength must not be null. issueNumberLength: type: integer minimum: 1 maximum: 255 description: >- The expected issue number length. This field is required if issueNumberRequired is set to true. allowIssuance: type: boolean description: Indicates if issuance is allowed or not. required: - id - name - mediaTypeDescriptors - issuanceType - characterSet - minLength - maxLength - allowReissuance - luhnCheckRequired - issueNumberRequired - allowIssuance paging-model: title: Paging required: - limit - offset - total type: object additionalProperties: false properties: offset: minimum: 0 type: integer description: The number of entities skipped before the list begins. limit: minimum: 1 type: integer description: The maximum number of entities returned in the list. total: minimum: 0 type: integer description: The total amount of entities. description: The paging information model. credential-value-issuance-type-enum: title: Credential Value Issuance Type type: string description: >- The issuance type. The IIN issuance type will only allow numerical credential values with lengths between 10 and 19 numbers. The characterSet field must be NUMERIC and the iinId field must not be null, if issuanceType is IIN. enum: - IIN - CUSTOM x-internal: true error-response-model: title: Error Response description: The error response model. type: object additionalProperties: false required: - errors properties: errors: type: array description: The list of errors. minItems: 1 items: type: object additionalProperties: false required: - errorCode - errorMessage properties: errorCode: type: string description: The error code describing the failure. errorMessage: type: string description: The error message providing the error details. source: type: object additionalProperties: false description: The source of the error. properties: pathParameter: type: string description: The path parameter causing the error. queryParameter: type: string description: The query parameter causing the error. header: type: string description: The header causing the error. field: type: string description: The field causing the error. dependentResource: type: string description: The dependent resource causing the error. moreInfo: type: string description: More information about the error. responses: error-response: description: An error occurred. See error information for details. content: application/json: schema: $ref: '#/components/schemas/error-response-model' 500-error-response: description: An unexpected internal error occurred. content: {} securitySchemes: ApimKey: name: Ocp-Apim-Subscription-Key type: apiKey in: header description: The APIM subscription key. ````