---
updatedAt: 2026-05-22T15:57:54.000Z
agentTools:
  projectIndex: https://docs.ometria.com/llms.txt
---

# List Collections

List contact collections along with counts of records in each collection

# OpenAPI definition

```json
{
  "openapi": "3.0.0",
  "info": {
    "version": "1.1.0",
    "title": "Ometria data API",
    "description": "Welcome to the Ometria API reference.\n\n\nThe Ometria API is organized around the [REST](https://en.wikipedia.org/wiki/Representational_state_transfer) methodology, and it uses resource-oriented URLs, and common HTTP response codes to indicate API errors. All requests are authenticated using an API key which can be obtained from your account settings.\n\n### HTTPS\n\nAll requests to the Ometria API MUST be carried out via HTTPS. API servers do not listen on unsecured HTTP ports to avoid the possibility of insecure information exchange.\n\n### Message encoding\n\nThe V2 Ometria API uses JSON encoding for all data exchanges and assumes UTF-8 character encoding throughout.\n\n### Rate limits\n\nThe Ometria API has a default rate limit of 4 requests per second per Ometria account. The /push/ endpoint allows 8 requests per second per Ometria account. If you expect to exceed this limit, please contact us.\n\nIn the case of your application being rate limited, the HTTP code 429 (too many requests) will be returned. In this case your application should reduce the number of requests it is trying to send.",
    "contact": {
      "name": "Ometria",
      "email": "support@ometria.com",
      "url": "https://ometria.com"
    }
  },
  "x-explorer-enabled": false,
  "paths": {
    "/contacts": {
      "get": {
        "tags": [
          "Contacts"
        ],
        "summary": "List Collections",
        "description": "List contact collections along with counts of records in each collection",
        "parameters": [],
        "responses": {
          "200": {
            "description": "Collection objects",
            "content": {
              "application/json": {
                "schema": {
                  "type": "array",
                  "items": {
                    "$ref": "#/components/schemas/ContactCollection"
                  }
                }
              }
            }
          },
          "403": {
            "description": "API key is not authorised to access this resource"
          }
        }
      }
    }
  },
  "security": [
    {
      "apikey": []
    }
  ],
  "servers": [
    {
      "url": "https://api.ometria.com/v2"
    }
  ],
  "components": {
    "securitySchemes": {
      "apikey": {
        "type": "apiKey",
        "name": "X-Ometria-Auth",
        "in": "header",
        "description": "Ometria API key which can be obtained from your Ometria account administrator"
      }
    },
    "schemas": {
      "ContactCollection": {
        "type": "object",
        "description": "Describes a collection of Contact listing records.",
        "properties": {
          "collection": {
            "type": "string",
            "description": "The collection ID."
          },
          "count": {
            "type": "integer",
            "description": "The number of records belonging to the collection."
          }
        },
        "example": {
          "collection": "default",
          "count": 43540
        }
      }
    }
  },
  "x-readme": {
    "proxy-enabled": true,
    "samples-enabled": true
  }
}
```