> ## Documentation Index > Fetch the complete documentation index at: https://docs.seam.co/llms.txt > Use this file to discover all available pages before exploring further. # Create Multiple Linked Access Codes > Creates new [access codes](https://docs.seam.co/low-level-apis/smart-locks/access-codes) that share a common code across multiple devices. Users with more than one door lock in a property may want to create groups of linked access codes, all of which have the same code (PIN). For example, a short-term rental host may want to provide guests the same PIN for both a front door lock and a back door lock. If you specify a custom code, Seam assigns this custom code to each of the resulting access codes. However, in this case, Seam does not link these access codes together with a `common_code_key`. That is, `common_code_key` remains null for these access codes. If you want to change these access codes that are not linked by a `common_code_key`, you cannot use `/access_codes/update_multiple`. However, you can update each of these access codes individually, using `/access_codes/update`. See also [Creating and Updating Multiple Linked Access Codes](https://docs.seam.co/low-level-apis/smart-locks/access-codes/creating-and-updating-multiple-linked-access-codes). For granting a person access to a space, [Access Grants](https://docs.seam.co/use-cases/granting-access) are the default and recommended approach and work across both standalone smart locks and access systems. Use the lower-level Access Codes API directly only when you specifically need to manage individual PIN codes. ## OpenAPI ````yaml /openapi.json post /access_codes/create_multiple openapi: 3.0.0 info: title: Seam Connect version: 1.0.0 servers: - url: https://connect.getseam.com security: [] tags: - description: access_codes name: /access_codes - description: acs name: /acs - description: action_attempts name: /action_attempts - description: client_sessions name: /client_sessions - description: connected_accounts name: /connected_accounts - description: connect_webviews name: /connect_webviews - description: devices name: /devices - description: events name: /events - description: health name: /health - description: locks name: /locks - description: networks name: /networks - description: noise_sensors name: /noise_sensors - description: phones name: /phones - description: thermostats name: /thermostats - description: user_identities name: /user_identities - description: webhooks name: /webhooks - description: workspaces name: /workspaces paths: /access_codes/create_multiple: post: tags: - /access_codes summary: Create Multiple Linked Access Codes description: >- Creates new [access codes](https://docs.seam.co/low-level-apis/smart-locks/access-codes) that share a common code across multiple devices. Users with more than one door lock in a property may want to create groups of linked access codes, all of which have the same code (PIN). For example, a short-term rental host may want to provide guests the same PIN for both a front door lock and a back door lock. If you specify a custom code, Seam assigns this custom code to each of the resulting access codes. However, in this case, Seam does not link these access codes together with a `common_code_key`. That is, `common_code_key` remains null for these access codes. If you want to change these access codes that are not linked by a `common_code_key`, you cannot use `/access_codes/update_multiple`. However, you can update each of these access codes individually, using `/access_codes/update`. See also [Creating and Updating Multiple Linked Access Codes](https://docs.seam.co/low-level-apis/smart-locks/access-codes/creating-and-updating-multiple-linked-access-codes). For granting a person access to a space, [Access Grants](https://docs.seam.co/use-cases/granting-access) are the default and recommended approach and work across both standalone smart locks and access systems. Use the lower-level Access Codes API directly only when you specifically need to manage individual PIN codes. operationId: accessCodesCreateMultiplePost requestBody: content: application/json: schema: properties: allow_external_modification: description: >- Indicates whether [external modification](https://docs.seam.co/low-level-apis/smart-locks/access-codes#external-modification) of the code is allowed. Default: `false`. type: boolean attempt_for_offline_device: default: true type: boolean behavior_when_code_cannot_be_shared: default: throw description: >- Desired behavior if any device cannot share a code. If `throw` (default), no access codes will be created if any device cannot share a code. If `create_random_code`, a random code will be created on devices that cannot share a code. enum: - throw - create_random_code type: string code: description: Code to be used for access. maxLength: 12 minLength: 4 pattern: ^\d+$ type: string device_ids: description: >- IDs of the devices for which you want to create the new access codes. items: format: uuid type: string type: array ends_at: description: >- Date and time at which the validity of the new access code ends, in [ISO 8601](https://www.iso.org/iso-8601-date-and-time-format.html) format. Must be a time in the future and after `starts_at`. type: string is_external_modification_allowed: description: >- Indicates whether [external modification](https://docs.seam.co/low-level-apis/smart-locks/access-codes#external-modification) of the code is allowed. Default: `false`. type: boolean name: description: >- Name of the new access code. Enables administrators and users to identify the access code easily, especially when there are numerous access codes. Note that the name provided on Seam is used to identify the code on Seam and is not necessarily the name that will appear in the lock provider's app or on the device. This is because lock providers may have constraints on names, such as length, uniqueness, or characters that can be used. In addition, some lock providers may break down names into components such as `first_name` and `last_name`. To provide a consistent experience, Seam identifies the code on Seam by its name but may modify the name that appears on the lock provider's app or on the device. For example, Seam may add additional characters or truncate the name to meet provider constraints. To help your users identify codes set by Seam, Seam provides the name exactly as it appears on the lock provider's app or on the device as a separate property called `appearance`. This is an object with a `name` property and, optionally, `first_name` and `last_name` properties (for providers that break down a name into components). type: string prefer_native_scheduling: description: >- Indicates whether [native scheduling](https://docs.seam.co/low-level-apis/smart-locks/access-codes#native-scheduling) should be used for time-bound codes when supported by the provider. Default: `true`. type: boolean preferred_code_length: description: >- Preferred code length. If the affected devices do not support the preferred code length, Seam reverts to using the shortest supported code length. format: float type: number starts_at: description: >- Date and time at which the validity of the new access code starts, in [ISO 8601](https://www.iso.org/iso-8601-date-and-time-format.html) format. type: string use_backup_access_code_pool: description: >- Indicates whether to use a [backup access code pool](https://docs.seam.co/low-level-apis/smart-locks/access-codes#backup-access-codes) provided by Seam. If `true`, you can use [`/access_codes/pull_backup_access_code`](https://docs.seam.co/api/access_codes/pull_backup_access_code). type: boolean required: - device_ids type: object responses: '200': content: application/json: schema: properties: access_codes: items: $ref: '#/components/schemas/access_code' type: array ok: type: boolean required: - access_codes - ok type: object description: OK '400': description: Bad Request '401': description: Unauthorized security: - client_session: [] - client_session_with_customer: [] - pat_with_workspace: [] - console_session_with_workspace: [] - api_key: [] x-codeSamples: - lang: javascript label: Seam SDK source: |- await seam.accessCodes.createMultiple({ device_ids: [ "d9717800-fa73-401a-b66b-03f0ef950e2a", "550e8400-e29b-41d4-a716-446655440000", ], behavior_when_code_cannot_be_shared: "throw", preferred_code_length: 4, name: "My Linked Access Code", starts_at: "2025-06-19T01:41:56.000Z", ends_at: "2025-06-22T16:40:40.000Z", }); /* [ { "access_code_id": "e9cf6dd6-89aa-477f-a701-c08f3de13c1f", "code": "1234", "common_code_key": "auto_set_by_create_multiple_550e8400-e29b-41d4-a716-446655440000", "created_at": "2025-06-14T16:54:17.946242Z", "device_id": "c9cd621d-ef0c-45c8-b608-026ebdb74615", "ends_at": "2025-07-04T16:54:17.946049Z", "errors": [], "is_backup": false, "is_backup_access_code_available": false, "is_external_modification_allowed": false, "is_managed": true, "is_offline_access_code": false, "is_one_time_use": false, "is_scheduled_on_device": true, "is_waiting_for_code_assignment": false, "name": "My Linked Access Code", "pulled_backup_access_code_id": null, "starts_at": "2025-07-02T16:54:17.946049Z", "status": "set", "type": "time_bound", "warnings": [], "workspace_id": "750fc0bc-4450-4356-8d9f-18c6a3a6b2c7" } ] */ - lang: bash label: cURL source: >- curl --include --request POST "https://connect.getseam.com/access_codes/create_multiple" \ --header "Authorization: Bearer $SEAM_API_KEY" \ --json @- < [ { "access_code_id" => "e9cf6dd6-89aa-477f-a701-c08f3de13c1f", "code" => "1234", "common_code_key" => "auto_set_by_create_multiple_550e8400-e29b-41d4-a716-446655440000", "created_at" => "2025-06-14T16:54:17.946242Z", "device_id" => "c9cd621d-ef0c-45c8-b608-026ebdb74615", "ends_at" => "2025-07-04T16:54:17.946049Z", "errors" => [], "is_backup" => false, "is_backup_access_code_available" => false, "is_external_modification_allowed" => false, "is_managed" => true, "is_offline_access_code" => false, "is_one_time_use" => false, "is_scheduled_on_device" => true, "is_waiting_for_code_assignment" => false, "name" => "My Linked Access Code", "pulled_backup_access_code_id" => nil, "starts_at" => "2025-07-02T16:54:17.946049Z", "status" => "set", "type" => "time_bound", "warnings" => [], "workspace_id" => "750fc0bc-4450-4356-8d9f-18c6a3a6b2c7", }, ] - lang: php label: Seam SDK source: |- $seam->access_codes->create_multiple( device_ids: [ "d9717800-fa73-401a-b66b-03f0ef950e2a", "550e8400-e29b-41d4-a716-446655440000", ], behavior_when_code_cannot_be_shared: "throw", preferred_code_length: 4, name: "My Linked Access Code", starts_at: "2025-06-19T01:41:56.000Z", ends_at: "2025-06-22T16:40:40.000Z", ); // [ [ "access_code_id" => "e9cf6dd6-89aa-477f-a701-c08f3de13c1f", "code" => "1234", "common_code_key" => "auto_set_by_create_multiple_550e8400-e29b-41d4-a716-446655440000", "created_at" => "2025-06-14T16:54:17.946242Z", "device_id" => "c9cd621d-ef0c-45c8-b608-026ebdb74615", "ends_at" => "2025-07-04T16:54:17.946049Z", "errors" => [], "is_backup" => false, "is_backup_access_code_available" => false, "is_external_modification_allowed" => false, "is_managed" => true, "is_offline_access_code" => false, "is_one_time_use" => false, "is_scheduled_on_device" => true, "is_waiting_for_code_assignment" => false, "name" => "My Linked Access Code", "pulled_backup_access_code_id" => null, "starts_at" => "2025-07-02T16:54:17.946049Z", "status" => "set", "type" => "time_bound", "warnings" => [], "workspace_id" => "750fc0bc-4450-4356-8d9f-18c6a3a6b2c7", ], ]; - lang: bash label: Seam CLI source: >- seam access-codes create-multiple --device_ids ["d9717800-fa73-401a-b66b-03f0ef950e2a","550e8400-e29b-41d4-a716-446655440000"] --behavior_when_code_cannot_be_shared "throw" --preferred_code_length 4 --name "My Linked Access Code" --starts_at "2025-06-19T01:41:56.000Z" --ends_at "2025-06-22T16:40:40.000Z" # [ # { # "access_code_id": "e9cf6dd6-89aa-477f-a701-c08f3de13c1f", # "code": "1234", # "common_code_key": "auto_set_by_create_multiple_550e8400-e29b-41d4-a716-446655440000", # "created_at": "2025-06-14T16:54:17.946242Z", # "device_id": "c9cd621d-ef0c-45c8-b608-026ebdb74615", # "ends_at": "2025-07-04T16:54:17.946049Z", # "errors": [], # "is_backup": false, # "is_backup_access_code_available": false, # "is_external_modification_allowed": false, # "is_managed": true, # "is_offline_access_code": false, # "is_one_time_use": false, # "is_scheduled_on_device": true, # "is_waiting_for_code_assignment": false, # "name": "My Linked Access Code", # "pulled_backup_access_code_id": null, # "starts_at": "2025-07-02T16:54:17.946049Z", # "status": "set", # "type": "time_bound", # "warnings": [], # "workspace_id": "750fc0bc-4450-4356-8d9f-18c6a3a6b2c7" # } # ] components: schemas: access_code: description: >- Represents a smart lock [access code](https://docs.seam.co/low-level-apis/smart-locks/access-codes). properties: access_code_id: description: Unique identifier for the access code. format: uuid type: string code: description: Code used for access. Typically, a numeric or alphanumeric string. nullable: true type: string common_code_key: description: >- Unique identifier for a group of access codes that share the same code. nullable: true type: string created_at: description: Date and time at which the access code was created. format: date-time type: string device_id: description: Unique identifier for the device associated with the access code. format: uuid type: string dormakaba_oracode_metadata: description: >- Metadata for a dormakaba Oracode managed access code. Only present for access codes from dormakaba Oracode devices. nullable: true properties: is_cancellable: description: >- Indicates whether the stay can be cancelled via the Dormakaba Oracode API. type: boolean is_early_checkin_able: description: Indicates whether early check-in is available for this stay. type: boolean is_extendable: description: >- Indicates whether the stay can be extended via the Dormakaba Oracode API. type: boolean is_overridable: description: >- Indicates whether the access code can be overridden. When false, the maximum number of overrides has been reached. type: boolean site_name: description: Dormakaba Oracode site name associated with this access code. type: string stay_id: description: Dormakaba Oracode stay ID associated with this access code. format: float type: number user_level_id: description: >- Dormakaba Oracode user level ID associated with this access code. type: string user_level_name: description: >- Dormakaba Oracode user level name associated with this access code. nullable: true type: string required: - stay_id - user_level_name type: object ends_at: description: >- Date and time after which the time-bound access code becomes inactive. format: date-time nullable: true type: string errors: type: array description: >- Errors associated with the [access code](https://docs.seam.co/low-level-apis/smart-locks/access-codes). items: type: object properties: error_code: type: string description: Error or warning code. message: type: string description: Human-readable description. created_at: type: string format: date-time description: When this error or warning was generated. is_backup: description: Indicates whether the access code is a backup code. type: boolean is_backup_access_code_available: description: >- Indicates whether a backup access code is available for use if the primary access code is lost or compromised. type: boolean is_external_modification_allowed: description: >- Indicates whether changes to the access code from external sources are permitted. type: boolean is_managed: description: Indicates whether Seam manages the access code. enum: - true type: boolean is_offline_access_code: description: >- Indicates whether the access code is intended for use in offline scenarios. If `true`, this code can be created on a device without a network connection. type: boolean is_one_time_use: description: >- Indicates whether the access code can only be used once. If `true`, the code becomes invalid after the first use. type: boolean is_scheduled_on_device: description: >- Indicates whether the code is set on the device according to a preconfigured schedule. type: boolean is_waiting_for_code_assignment: description: Indicates whether the access code is waiting for a code assignment. type: boolean name: description: >- Name of the access code. Enables administrators and users to identify the access code easily, especially when there are numerous access codes. Note that the name provided on Seam is used to identify the code on Seam and is not necessarily the name that will appear in the lock provider's app or on the device. This is because lock providers may have constraints on names, such as length, uniqueness, or characters that can be used. In addition, some lock providers may break down names into components such as `first_name` and `last_name`. To provide a consistent experience, Seam identifies the code on Seam by its name but may modify the name that appears on the lock provider's app or on the device. For example, Seam may add additional characters or truncate the name to meet provider constraints. To help your users identify codes set by Seam, Seam provides the name exactly as it appears on the lock provider's app or on the device as a separate property called `appearance`. This is an object with a `name` property and, optionally, `first_name` and `last_name` properties (for providers that break down a name into components). nullable: true type: string pending_mutations: description: >- Collection of pending mutations for the access code. Indicates changes that Seam is in the process of pushing to the device. items: discriminator: propertyName: mutation_code oneOf: - description: >- Seam is in the process of setting an access code on the device. properties: created_at: description: Date and time at which the mutation was created. format: date-time type: string message: description: Detailed description of the mutation. type: string mutation_code: description: >- Mutation code to indicate that Seam is in the process of setting an access code on the device. enum: - creating type: string required: - created_at - message - mutation_code type: object - description: >- Seam is waiting until closer to the access code's start time before programming it on the device. properties: created_at: description: Date and time at which the mutation was created. format: date-time type: string message: description: Detailed description of the mutation. type: string mutation_code: description: >- Mutation code to indicate that Seam is waiting until closer to the access code's start time before programming it on the device. enum: - deferring_creation type: string scheduled_at: description: >- Date and time at which Seam will attempt to program this access code on the device. format: date-time type: string required: - created_at - message - mutation_code - scheduled_at type: object - description: >- Seam is in the process of removing an access code from the device. properties: created_at: description: Date and time at which the mutation was created. format: date-time type: string message: description: Detailed description of the mutation. type: string mutation_code: description: >- Mutation code to indicate that Seam is in the process of removing an access code from the device. enum: - deleting type: string required: - created_at - message - mutation_code type: object - description: >- Seam is in the process of pushing an updated PIN code to the device. properties: created_at: description: Date and time at which the mutation was created. format: date-time type: string from: description: Previous code configuration. properties: code: description: Previous PIN code. nullable: true type: string required: - code type: object message: description: Detailed description of the mutation. type: string mutation_code: description: >- Mutation code to indicate that Seam is in the process of pushing an updated PIN code to the device. enum: - updating_code type: string to: description: New code configuration. properties: code: description: New PIN code. nullable: true type: string required: - code type: object required: - created_at - message - mutation_code - from - to type: object - description: >- Seam is in the process of pushing an updated access code name to the device. properties: created_at: description: Date and time at which the mutation was created. format: date-time type: string from: description: Previous name configuration. properties: name: description: Previous access code name. nullable: true type: string required: - name type: object message: description: Detailed description of the mutation. type: string mutation_code: description: >- Mutation code to indicate that Seam is in the process of pushing an updated access code name to the device. enum: - updating_name type: string to: description: New name configuration. properties: name: description: New access code name. nullable: true type: string required: - name type: object required: - created_at - message - mutation_code - from - to type: object - description: >- Seam is in the process of pushing an updated time frame to the device. properties: created_at: description: Date and time at which the mutation was created. format: date-time type: string from: description: Previous time frame configuration. properties: ends_at: description: Previous end time for the access code. format: date-time nullable: true type: string starts_at: description: Previous start time for the access code. format: date-time nullable: true type: string required: - starts_at - ends_at type: object message: description: Detailed description of the mutation. type: string mutation_code: description: >- Mutation code to indicate that Seam is in the process of pushing updated access code time frame to the device. enum: - updating_time_frame type: string to: description: New time frame configuration. properties: ends_at: description: New end time for the access code. format: date-time nullable: true type: string starts_at: description: New start time for the access code. format: date-time nullable: true type: string required: - starts_at - ends_at type: object required: - created_at - message - mutation_code - from - to type: object type: array pulled_backup_access_code_id: description: >- Identifier of the pulled backup access code. Used to associate the pulled backup access code with the original access code. format: uuid nullable: true type: string starts_at: description: Date and time at which the time-bound access code becomes active. format: date-time nullable: true type: string status: description: >- Current status of the access code within the operational lifecycle. Values are `setting`, a transitional phase that indicates that the code is being configured or activated; `set`, which indicates that the code is active and operational; `unset`, which indicates a deactivated or unused state, either before activation or after deliberate deactivation; `removing`, which indicates a transitional period in which the code is being deleted or made inactive; and `unknown`, which indicates an indeterminate state, due to reasons such as system errors or incomplete data, that highlights a potential need for system review or troubleshooting. See also [Lifecycle of Access Codes](https://docs.seam.co/low-level-apis/smart-locks/access-codes/lifecycle-of-access-codes). enum: - setting - set - unset - removing - unknown type: string type: description: >- Type of the access code. `ongoing` access codes are active continuously until deactivated manually. `time_bound` access codes have a specific duration. enum: - time_bound - ongoing type: string warnings: type: array description: >- Warnings associated with the [access code](https://docs.seam.co/low-level-apis/smart-locks/access-codes). items: type: object properties: error_code: type: string description: Error or warning code. message: type: string description: Human-readable description. created_at: type: string format: date-time description: When this error or warning was generated. workspace_id: description: >- Unique identifier for the Seam workspace associated with the access code. format: uuid type: string required: - workspace_id - common_code_key - type - access_code_id - device_id - name - code - created_at - errors - warnings - is_managed - status - is_backup_access_code_available - is_external_modification_allowed - is_one_time_use - is_offline_access_code - pending_mutations type: object x-route-path: /access_codes securitySchemes: client_session: bearerFormat: Client Session Token scheme: bearer type: http client_session_with_customer: bearerFormat: Customer Client Session Token scheme: bearer type: http pat_with_workspace: bearerFormat: API Token scheme: bearer type: http console_session_with_workspace: bearerFormat: Console Session Token scheme: bearer type: http api_key: bearerFormat: API Key scheme: bearer type: http ````