> ## Documentation Index > Fetch the complete documentation index at: https://docs.neoagent.io/llms.txt > Use this file to discover all available pages before exploring further. # Preflight a backfill filter > Counts the entities the filter would match and classifies the result (OK / WARNING / ERROR). Use this to validate a filter before committing to create. No backfill row is created. ## OpenAPI ````yaml https://api.neoagent.io/public-api/openapi.json post /public-api/backfills/verify openapi: 3.1.0 info: description: >- Neo's public contract for the dashboard ChatAgent, partner integrations, and MSP automation. Every response is wrapped in a `{data, meta}` envelope; errors use `{error: {code, message, details?}, meta: {request_id}}`. Authenticate with a `Bearer neo_sk__` API key (service account) or a Microsoft Entra ID JWT (dashboard user). Signed-URL endpoints (end-user feedback links) take a `signature` query parameter instead. title: Neo Public API version: 1.0.0 servers: - url: https://api.neoagent.io security: [] tags: - description: Service metadata — health, OpenAPI. name: Meta - description: Agents and workflows — read, version history, delete, stats. name: Agents - description: Agent/workflow execution history, sub-resources, retry/cancel. name: Executions - description: PSA webhook events and their workflow-match results. name: Callbacks - description: Technician-in-the-loop approval requests. name: TIL requests - description: RMM script executions triggered by agents. name: RMM scripts - description: Dispatch-agent field-update decisions. name: Dispatch - description: The authenticated tenant. name: Tenant - description: Agent-builder schema catalogs (raw JSON payloads). name: Schemas - description: Escalate to the Neo team (HubSpot ticket). name: Escalation - description: Tenant settings. name: Settings - description: Tenant API-key management (dashboard JWT only). name: API keys - description: End-user feedback links (signed-URL auth). name: Feedback - description: End-client companies (CRUD + bulk-update). name: End companies - description: Channels — bind a CONVERSATIONAL agent to a transport (Teams). name: Channels - description: PSA/RMM/M365 integration status and connection management. name: Integrations - description: Technician roster (controls TIL routing and paging). name: Technicians - description: Future runs queued for TRIGGERED agents. name: Scheduled work - description: Subscription state and customer-facing credit usage (no provider $). name: Billing - description: Inbox messages and announcements. name: Inbox & Comms - description: Tenant-authored agent skills (CRUD) and the built-in skill catalog. name: Skills paths: /public-api/backfills/verify: post: tags: - Backfills summary: Preflight a backfill filter description: >- Counts the entities the filter would match and classifies the result (OK / WARNING / ERROR). Use this to validate a filter before committing to create. No backfill row is created. operationId: public_api.backfills_verify_post parameters: [] requestBody: content: application/json: schema: $ref: '#/components/schemas/VerifyBackfillRequest' required: true responses: '200': content: application/json: schema: properties: data: $ref: '#/components/schemas/VerifyBackfillResponse' meta: $ref: '#/components/schemas/SuccessMeta' required: - data - meta type: object description: Success. '400': content: application/json: schema: $ref: '#/components/schemas/ErrorEnvelope' description: Bad request — malformed input. '401': content: application/json: schema: $ref: '#/components/schemas/ErrorEnvelope' description: Unauthenticated — missing or invalid credentials. '403': content: application/json: schema: $ref: '#/components/schemas/ErrorEnvelope' description: Forbidden — authenticated but not allowed. '404': content: application/json: schema: $ref: '#/components/schemas/ErrorEnvelope' description: Not found. '409': content: application/json: schema: $ref: '#/components/schemas/ErrorEnvelope' description: Conflict — the resource is in a state that blocks this operation. '422': content: application/json: schema: $ref: '#/components/schemas/ErrorEnvelope' description: Request validation failed. '429': content: application/json: schema: $ref: '#/components/schemas/ErrorEnvelope' description: Rate limited — see Retry-After. '500': content: application/json: schema: $ref: '#/components/schemas/ErrorEnvelope' description: Internal server error. security: - bearerAuth: [] components: schemas: VerifyBackfillRequest: properties: entity_type: $ref: '#/components/schemas/EntityType' filter_spec: additionalProperties: true title: Filter Spec type: object required: - entity_type - filter_spec title: VerifyBackfillRequest type: object VerifyBackfillResponse: properties: matching_entities: anyOf: - type: integer - type: 'null' title: Matching Entities message: title: Message type: string safety_level: $ref: '#/components/schemas/BackfillSafetyLevel' success: title: Success type: boolean required: - success - safety_level - matching_entities - message title: VerifyBackfillResponse type: object SuccessMeta: properties: pagination: $ref: '#/components/schemas/Pagination' request_id: format: uuid type: string timings_ms: additionalProperties: type: number type: object warnings: description: >- Non-fatal warnings about the created/updated resource (e.g. an unhealthy PSA callback). items: type: string type: array required: - request_id - timings_ms type: object ErrorEnvelope: properties: error: properties: code: description: Stable machine-readable error code. type: string details: additionalProperties: true type: object message: type: string required: - code - message type: object meta: properties: request_id: format: uuid type: - string - 'null' type: object required: - error - meta type: object EntityType: enum: - ticket - project_ticket - task - scheduled_entry - time_entry - project - company - contact - resource - contract - opportunity - none - configuration - note - team - role - audit_trail - appointment - servicecall - contract_service - company_location - product title: EntityType type: string BackfillSafetyLevel: enum: - OK - WARNING - ERROR title: BackfillSafetyLevel type: string Pagination: properties: has_more: type: boolean next_cursor: type: - string - 'null' required: - next_cursor - has_more type: object securitySchemes: bearerAuth: description: >- `Authorization: Bearer ` where `` is either a `neo_sk__` API key (service account) or a Microsoft Entra ID access token (dashboard user). scheme: bearer type: http ````