> ## Documentation Index > Fetch the complete documentation index at: https://docs.devtune.ai/llms.txt > Use this file to discover all available pages before exploring further. # List content gaps > Returns canonical content-gap signals from the Actions system. These are topic or prompt-cluster opportunities backed by command-center evidence; workflow fields such as opportunityScore, status, briefs, and interventions remain on the Actions endpoints. ## OpenAPI ````yaml /openapi.json get /projects/{projectId}/content-gaps/list openapi: 3.1.0 info: title: DevTune API version: 2.0.0 description: >- API for programmatic access to your AI visibility data, webhook subscriptions, and automation workflows. Use this API to integrate DevTune data into CI/CD pipelines, BI tools, AI agents, and operational systems. servers: - url: https://devtune.ai/api/v2 description: Production security: - bearerAuth: [] paths: /projects/{projectId}/content-gaps/list: get: summary: List content gaps description: >- Returns canonical content-gap signals from the Actions system. These are topic or prompt-cluster opportunities backed by command-center evidence; workflow fields such as opportunityScore, status, briefs, and interventions remain on the Actions endpoints. operationId: listContentGaps parameters: - name: projectId in: path required: true schema: type: string format: uuid - name: windowDays in: query schema: type: integer default: 30 enum: - 30 - 90 description: >- Fixed rolling window in days. Supported values are 30 and 90. Defaults to 30. - name: cursor in: query schema: type: string description: Opaque cursor from the previous response. - name: pageSize in: query schema: type: integer default: 25 minimum: 1 maximum: 100 responses: '200': description: Content gaps content: application/json: schema: type: object properties: data: type: object properties: contentGaps: type: array maxItems: 100 items: type: object properties: candidateKey: type: string gapType: type: string enum: - topic - prompt-cluster signalStrength: type: number confidenceScore: type: number freshnessScore: type: number actionabilityScore: type: number targetType: type: string targetLabel: type: string title: type: string summary: type: string signals: type: object properties: promptCount: type: number primaryCitations: type: number competitorCitations: type: number thirdPartyCitations: type: number primaryShare: type: number dominanceRatio: type: number averagePrimaryPosition: type: number windowDays: type: number evidence: type: object properties: examplePrompts: type: array maxItems: 5 items: type: object topCompetitors: type: array maxItems: 5 items: type: object topThirdPartySource: type: object sourceRefs: type: array maxItems: 5 items: type: object factCount: type: integer windowStart: type: string format: date windowEnd: type: string format: date required: - candidateKey - gapType - signalStrength - confidenceScore - freshnessScore - actionabilityScore - targetType - targetLabel - title - summary - signals - evidence - windowStart - windowEnd gaps: type: array maxItems: 100 items: type: object coverage: type: object properties: requestedWindowDays: type: integer enum: - 30 - 90 availableDays: type: integer minimum: 0 dateFrom: type: string format: date dateTo: type: string format: date factMinDate: type: - string - 'null' format: date factMaxDate: type: - string - 'null' format: date isPartial: type: boolean required: - requestedWindowDays - availableDays - dateFrom - dateTo - factMinDate - factMaxDate - isPartial emptyState: type: - object - 'null' properties: reason: type: string message: type: string pagination: $ref: '#/components/schemas/CursorPagination' window: type: object properties: days: type: integer dateFrom: type: string format: date dateTo: type: string format: date required: - days - dateFrom - dateTo required: - contentGaps - coverage - emptyState - gaps - pagination - window meta: $ref: '#/components/schemas/Meta' '400': $ref: '#/components/responses/BadRequestError' '401': $ref: '#/components/responses/UnauthorizedError' '403': $ref: '#/components/responses/ForbiddenError' '429': $ref: '#/components/responses/RateLimitExceededError' components: schemas: CursorPagination: type: object properties: pageSize: type: integer minimum: 1 maximum: 100 cursor: type: - string - 'null' nextCursor: type: - string - 'null' hasMore: type: boolean required: - pageSize - cursor - nextCursor - hasMore Meta: type: object properties: timestamp: type: string format: date-time projectId: type: string format: uuid Error: type: object properties: error: type: string message: type: string status: type: integer required: - error - message - status responses: BadRequestError: description: Bad request content: application/json: schema: $ref: '#/components/schemas/Error' UnauthorizedError: description: Unauthorized content: application/json: schema: $ref: '#/components/schemas/Error' ForbiddenError: description: Forbidden content: application/json: schema: $ref: '#/components/schemas/Error' RateLimitExceededError: description: Rate limit exceeded headers: X-RateLimit-Limit: $ref: '#/components/headers/X-RateLimit-Limit' X-RateLimit-Remaining: $ref: '#/components/headers/X-RateLimit-Remaining' X-RateLimit-Reset: $ref: '#/components/headers/X-RateLimit-Reset' content: application/json: schema: $ref: '#/components/schemas/Error' headers: X-RateLimit-Limit: description: Maximum requests per window schema: type: integer X-RateLimit-Remaining: description: Requests remaining in current window schema: type: integer X-RateLimit-Reset: description: Unix timestamp when the window resets schema: type: integer securitySchemes: bearerAuth: type: http scheme: bearer description: >- API key with dtk_live_ prefix. Obtain it from API Keys in the account sidebar. New keys start with all supported scopes selected for the chosen project, and you can narrow them to specific read/write scopes as needed. ````