> For the complete documentation index, see [llms.txt](https://docs.cekat.ai/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.cekat.ai/api-documentation/crm/contact/get-contact-filter-fields.md).

# Get contact filter fields

Lists every field you can use in `POST /api/crm/contact/search`, including standard fields, custom properties, and additional fields, with the operators each one supports.

```json
{"openapi":"3.0.3","info":{"title":"Cekat Open API","version":"1.0.0"},"tags":[{"name":"Contact","description":"Contacts are the people your business talks to. Each contact has standard fields (name, phone number, email, and so on) plus **custom properties** that you define as columns on your contact board.\n\n## Custom properties\n1. Call `GET /api/crm/contact/filter-fields` or `GET /api/crm/contact/{id}/property` to see the available properties and their column IDs and types.\n2. Read a contact's values from `crm_column` in `GET /api/crm/contact/{contact_id}`. Values are keyed by property name.\n3. Write values with `PUT /api/crm/contact/{id}/property`, or with `values` when creating a contact.\n4. Create new properties with `POST /api/crm/contact/property`.\n"}],"servers":[{"url":"https://api.cekat.ai","description":"Production"}],"security":[{"CekatApiKey":[]},{"BearerAuth":[]}],"components":{"securitySchemes":{"CekatApiKey":{"type":"apiKey","in":"header","name":"api_key","description":"Your business's Cekat API key, from **Settings → Developers & API** in the Cekat dashboard (https://chat.cekat.ai/developers?section=apikeys). Available on the Business and Enterprise plans."},"BearerAuth":{"type":"http","scheme":"bearer","description":"The same Cekat API key, sent as `Authorization: Bearer YOUR_API_KEY`. Accepted only by endpoints under `/api/...`."}},"responses":{"ApiUnauthorized":{"description":"The API key is missing or invalid.","content":{"application/json":{"schema":{"$ref":"#/components/schemas/ApiError"}}}},"ApiNotFound":{"description":"The resource was not found or does not belong to your business.","content":{"application/json":{"schema":{"$ref":"#/components/schemas/ApiError"}}}},"TooManyRequests":{"description":"Rate limit exceeded. Wait and retry.","content":{"application/json":{"schema":{"$ref":"#/components/schemas/RateLimitError"}}}}},"schemas":{"ApiError":{"type":"object","description":"Error body returned by the `/api/...` endpoints.","properties":{"success":{"type":"boolean"},"message":{"type":"string"},"statusCode":{"type":"integer"},"error":{"type":"object","properties":{"message":{"type":"string"}}},"correlationId":{"type":"string","description":"Request ID. Include it when contacting Cekat support."}}},"RateLimitError":{"type":"object","properties":{"message":{"type":"string"}}}}},"paths":{"/api/crm/contact/filter-fields":{"get":{"tags":["Contact"],"operationId":"GetContactFilterFields","summary":"Get contact filter fields","description":"Lists every field you can use in `POST /api/crm/contact/search`, including standard fields, custom properties, and additional fields, with the operators each one supports.","responses":{"200":{"description":"Filterable fields.","content":{"application/json":{"schema":{"type":"object","properties":{"message":{"type":"string"},"data":{"type":"array","items":{"type":"object","properties":{"field_category":{"type":"string","enum":["primary","crm_column","additional_field"]},"filter_key":{"type":"string"},"id":{"type":"string","description":"Use as `field_id` in a search."},"name":{"type":"string"},"type":{"type":"string"},"operations":{"type":"array","items":{"type":"string"}},"options":{"type":"array","description":"Allowed values, for select fields.","items":{"type":"string"}}}}}}}}}},"401":{"$ref":"#/components/responses/ApiUnauthorized"},"404":{"$ref":"#/components/responses/ApiNotFound"},"429":{"$ref":"#/components/responses/TooManyRequests"}}}}}}
```