> ## Documentation Index > Fetch the complete documentation index at: https://docs.fuseai.com/llms.txt > Use this file to discover all available pages before exploring further. # The personalization variables this campaign's steps can use > Lists the custom and smart column tokens the campaign's steps can personalise with, deduplicated across the campaign's source lists (the first list that defines a column name wins, which is how values resolve at send time). Paste a `token` verbatim into a step's subject or body and it is substituted per lead when the message is sent. Columns whose name contains a brace or a pipe are skipped because they could never form a usable token. Built-in tokens such as {Contact First Name} are always available and are not listed here. Only the token owner's own campaigns resolve, and a deleted campaign answers 404. Rate limit: 30 requests/minute and 1,000/day per token owner, shared by every campaign, scheduled-send, campaign-template and knowledge-hub endpoint. Errors: - `404` `CAMPAIGN_NOT_FOUND` — No campaign with this id exists, it belongs to another account (including a campaign delegated to you or shared by your team's visibility settings), or it has been deleted. - `422` `VALIDATION_FAILED` — campaignId is not a 24-character hex id. - `429` `RATE_LIMITED` — More than 30 campaign requests in a minute, or 1,000 in a day, for this token owner (the bucket is shared by every /business/campaigns, /business/scheduled-sends, /business/campaign-templates and /business/knowledge-hubs call). - `500` `UNEXPECTED_ERROR` — An unhandled failure; the detail stays in our logs and is never returned. Requires one of the following token scopes: campaigns. ## OpenAPI ````yaml /openapi.json get /business/campaigns/{campaignId}/variables openapi: 3.1.0 info: title: Fuse Business API version: 1.0.0 description: >- External API for lists, campaigns, prospect search and contacts. Authenticate with your API token as HTTP Basic. All paths are under /api/v1. servers: - url: https://api.tryfuse.ai/api/v1 description: Production security: - basicAuth: [] tags: - name: Lists - name: Custom columns - name: Smart columns - name: Exports - name: Campaigns - name: Knowledge hubs - name: Analytics - name: Website intent - name: Account - name: Prospect search - name: Campaign steps - name: Scheduled sends - name: Campaign templates - name: Agents - name: Research - name: Company search - name: Saved searches - name: Folders - name: Contacts paths: /business/campaigns/{campaignId}/variables: get: tags: - Campaigns summary: The personalization variables this campaign's steps can use description: >- Lists the custom and smart column tokens the campaign's steps can personalise with, deduplicated across the campaign's source lists (the first list that defines a column name wins, which is how values resolve at send time). Paste a `token` verbatim into a step's subject or body and it is substituted per lead when the message is sent. Columns whose name contains a brace or a pipe are skipped because they could never form a usable token. Built-in tokens such as {Contact First Name} are always available and are not listed here. Only the token owner's own campaigns resolve, and a deleted campaign answers 404. Rate limit: 30 requests/minute and 1,000/day per token owner, shared by every campaign, scheduled-send, campaign-template and knowledge-hub endpoint. Errors: - `404` `CAMPAIGN_NOT_FOUND` — No campaign with this id exists, it belongs to another account (including a campaign delegated to you or shared by your team's visibility settings), or it has been deleted. - `422` `VALIDATION_FAILED` — campaignId is not a 24-character hex id. - `429` `RATE_LIMITED` — More than 30 campaign requests in a minute, or 1,000 in a day, for this token owner (the bucket is shared by every /business/campaigns, /business/scheduled-sends, /business/campaign-templates and /business/knowledge-hubs call). - `500` `UNEXPECTED_ERROR` — An unhandled failure; the detail stays in our logs and is never returned. Requires one of the following token scopes: campaigns. operationId: listCampaignVariables parameters: - name: campaignId in: path required: true description: >- The campaign's id (24-character hex ObjectId), as returned by POST /business/campaigns or as the campaignId of a GET /business/campaigns row. schema: type: string description: >- The campaign's id (24-character hex ObjectId), as returned by POST /business/campaigns or as the campaignId of a GET /business/campaigns row. responses: '200': description: Success headers: RateLimit-Limit: schema: type: integer description: Requests permitted in the current window. RateLimit-Remaining: schema: type: integer description: Requests remaining in the current window. RateLimit-Reset: schema: type: integer description: Seconds until the current window resets. content: application/json: schema: type: object properties: variables: type: array items: type: object properties: token: type: - string - 'null' description: >- The literal token to paste into a step, for example {Column: Lead Score}. name: type: - string - 'null' description: The column's name. type: type: - string - 'null' description: >- The column's value type (for example text, number, enum, date). listId: type: - string - 'null' description: The list that defines the column. listName: type: - string - 'null' required: - token - name - type - listId - listName required: - variables example: variables: - token: '{Column: Lead Score}' name: Lead Score type: enum listId: 6a1edba88936e0fe1b20287c listName: Fintech CFOs - US '400': description: Error content: application/json: schema: $ref: '#/components/schemas/Error' '401': description: Error content: application/json: schema: $ref: '#/components/schemas/Error' '402': description: Error content: application/json: schema: $ref: '#/components/schemas/Error' '403': description: Error content: application/json: schema: $ref: '#/components/schemas/Error' '404': description: Error content: application/json: schema: $ref: '#/components/schemas/Error' '409': description: Error content: application/json: schema: $ref: '#/components/schemas/Error' '422': description: Error content: application/json: schema: $ref: '#/components/schemas/Error' '429': description: Error content: application/json: schema: $ref: '#/components/schemas/Error' '500': description: Error content: application/json: schema: $ref: '#/components/schemas/Error' security: - basicAuth: [] components: schemas: Error: type: object properties: error: type: object properties: code: type: string message: type: string param: type: - string - 'null' doc_url: type: - string - 'null' request_id: type: - string - 'null' required: - code - message required: - error securitySchemes: basicAuth: type: http scheme: basic description: >- Your API token (`af_…`) as the Basic-auth username, with an empty password. ````