> ## Documentation Index > Fetch the complete documentation index at: https://docs.monaco.com/llms.txt > Use this file to discover all available pages before exploring further. # Preview an Account Merge > Read-only preview of merging the accounts in `source_account_ids` into the account in the path. Nothing is changed. Returns what the merge would do: contacts and opportunities that move or are merged, contacts that conflict, the live sequences that would be stopped, and the resulting websites. Always preview before calling `merge_accounts`. Requires only the `api:read` scope. ## OpenAPI ````yaml https://api.monaco.com/openapi.json post /v1/accounts/{account_id}/merge/preview openapi: 3.2.1 info: title: Monaco Public API description: Public API for Monaco version: 1.0.0 servers: - url: https://api.monaco.com security: [] paths: /v1/accounts/{account_id}/merge/preview: post: tags: - Accounts summary: Preview an Account Merge description: >- Read-only preview of merging the accounts in `source_account_ids` into the account in the path. Nothing is changed. Returns what the merge would do: contacts and opportunities that move or are merged, contacts that conflict, the live sequences that would be stopped, and the resulting websites. Always preview before calling `merge_accounts`. Requires only the `api:read` scope. operationId: preview_account_merge parameters: - name: account_id in: path required: true schema: type: string format: uuid title: Account Id requestBody: required: true content: application/json: schema: $ref: '#/components/schemas/AccountMergePreviewRequest' responses: '200': description: Successful Response content: application/json: schema: $ref: >- #/components/schemas/PublicItemResponse_AccountMergePreviewResponse_ '422': description: The merge request is invalid content: application/json: schema: $ref: '#/components/schemas/AccountMergeErrorResponse' 4XX: description: Client error content: application/json: schema: $ref: '#/components/schemas/PublicErrorResponse' components: schemas: AccountMergePreviewRequest: properties: source_account_ids: items: type: string format: uuid type: array maxItems: 100 minItems: 1 title: Source Account Ids description: >- IDs of the accounts to merge into the account in the path. Each is deleted when the merge is applied. At most 100 per request. additionalProperties: false type: object required: - source_account_ids title: AccountMergePreviewRequest PublicItemResponse_AccountMergePreviewResponse_: properties: data: $ref: '#/components/schemas/AccountMergePreviewResponse' meta: $ref: '#/components/schemas/ResponseMeta' type: object required: - data title: PublicItemResponse[AccountMergePreviewResponse] AccountMergeErrorResponse: properties: error: $ref: '#/components/schemas/AccountMergeErrorDetail' type: object required: - error title: AccountMergeErrorResponse PublicErrorResponse: properties: error: $ref: '#/components/schemas/ErrorDetail' type: object required: - error title: PublicErrorResponse AccountMergePreviewResponse: properties: target_account: $ref: '#/components/schemas/MergeAccountSummary' source_accounts: items: $ref: '#/components/schemas/MergeAccountSummary' type: array title: Source Accounts counts: $ref: '#/components/schemas/AccountMergeCounts' contact_conflicts: items: $ref: '#/components/schemas/AccountMergeContactConflict' type: array title: Contact Conflicts blocking_sequences: items: $ref: '#/components/schemas/AccountMergeBlockingSequence' type: array title: Blocking Sequences requires_sequence_stop: type: boolean title: Requires Sequence Stop description: True when applying the merge would stop live sequences websites: $ref: '#/components/schemas/AccountMergeWebsites' description: The websites the merged account will hold type: object required: - target_account - source_accounts - counts - contact_conflicts - blocking_sequences - requires_sequence_stop - websites title: AccountMergePreviewResponse ResponseMeta: properties: timestamp: type: string format: date-time title: Timestamp description: Server timestamp of the response type: object title: ResponseMeta AccountMergeErrorDetail: properties: code: type: string title: Code description: Machine-readable error code examples: - not_found message: type: string title: Message description: Human-readable error message examples: - Resource not found completed_steps: anyOf: - items: type: string type: array - type: 'null' title: Completed Steps description: >- For `merge_failed`, the steps committed before the failure, without its cause source_accounts_deleted: anyOf: - type: integer - type: 'null' title: Source Accounts Deleted description: >- For `merge_failed`, how many source deletions committed before the failure blocking_sequence_count: anyOf: - type: integer - type: 'null' title: Blocking Sequence Count description: >- For `sequence_stop_confirmation_required`, how many live sequences would stop type: object required: - code - message title: AccountMergeErrorDetail ErrorDetail: properties: code: type: string title: Code description: Machine-readable error code examples: - not_found message: type: string title: Message description: Human-readable error message examples: - Resource not found type: object required: - code - message title: ErrorDetail MergeAccountSummary: properties: account_id: type: string title: Account Id name: anyOf: - type: string - type: 'null' title: Name website: anyOf: - type: string - type: 'null' title: Website type: object required: - account_id title: MergeAccountSummary AccountMergeCounts: properties: contacts_moving: type: integer title: Contacts Moving contacts_merging: type: integer title: Contacts Merging opportunities_moving: type: integer title: Opportunities Moving opportunities_deduped: type: integer title: Opportunities Deduped tasks_moving: type: integer title: Tasks Moving tags_added: type: integer title: Tags Added type: object required: - contacts_moving - contacts_merging - opportunities_moving - opportunities_deduped - tasks_moving - tags_added title: AccountMergeCounts AccountMergeContactConflict: properties: reason: type: string title: Reason description: >- The shared identity: `SAME_PERSON`, `DUPLICATE_EMAIL` or `DUPLICATE_LINKEDIN`. The target contact is kept and the source contact is merged into it. source_contact: $ref: '#/components/schemas/MergeContactSummary' target_contact: $ref: '#/components/schemas/MergeContactSummary' type: object required: - reason - source_contact - target_contact title: AccountMergeContactConflict AccountMergeBlockingSequence: properties: sequence_id: type: string title: Sequence Id status: type: string title: Status contact: $ref: '#/components/schemas/MergeContactSummary' name: anyOf: - type: string - type: 'null' title: Name campaign_name: anyOf: - type: string - type: 'null' title: Campaign Name type: object required: - sequence_id - status - contact title: AccountMergeBlockingSequence AccountMergeWebsites: properties: primary: anyOf: - type: string - type: 'null' title: Primary secondary: items: type: string type: array title: Secondary type: object required: - secondary title: AccountMergeWebsites MergeContactSummary: properties: id: type: string title: Id name: anyOf: - type: string - type: 'null' title: Name email: anyOf: - type: string - type: 'null' title: Email type: object required: - id title: MergeContactSummary ```` This documentation is built and hosted on [Mintlify](https://mintlify.com), a developer documentation platform.