> For the complete documentation index, see [llms.txt](https://docs.agentalk.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.agentalk.io/api-reference/custom-fields.md).

# Custom Fields

List and create organization-level custom field definitions for contacts

## Get Custom Fields

> Get all custom field definitions for the organization. Supports pagination with page and page\_size query parameters.

````json
{"openapi":"3.0.3","info":{"title":"Agentalk External API","version":"1.0.0"},"tags":[{"name":"Custom Fields","description":"List and create organization-level custom field definitions for contacts"}],"servers":[{"url":"https://api.agentalk.io","description":"Agentalk API"}],"security":[{"OrganizationApiToken":[]}],"components":{"securitySchemes":{"OrganizationApiToken":{"type":"http","scheme":"bearer","bearerFormat":"OrgId.SecretToken","description":"**Organization API Token.**\n\nPaste **only** your token in the field below — the `Bearer ` prefix is added automatically by the docs UI and in every generated code sample. The final header sent is:\n\n```\nAuthorization: Bearer {orgId}.{secretToken}\n```\n\nToken format: `{orgId}.{secretToken}` — example: `15c94c3c-1873-4a09-bfbb-03357c29ea50.abc123xyz`.\n\nJWT tokens are NOT accepted."}}},"paths":{"/api/account/custom-fields":{"get":{"operationId":"account_custom_fields_retrieve","description":"Get all custom field definitions for the organization. Supports pagination with page and page_size query parameters.","summary":"Get Custom Fields","parameters":[{"in":"query","name":"page","schema":{"type":"integer"},"description":"Page number"},{"in":"query","name":"page_size","schema":{"type":"integer"},"description":"Number of results per page (max 100)"}],"tags":["Custom Fields"],"responses":{"200":{"content":{"application/json":{"schema":{"type":"object","additionalProperties":{}}}},"description":"List of organization-level custom field definitions"}}}}}}
````

## Create Custom Field

> Create a new custom field definition at organization level. The key will be used as 'custom.{key}' when setting values on contacts.

````json
{"openapi":"3.0.3","info":{"title":"Agentalk External API","version":"1.0.0"},"tags":[{"name":"Custom Fields","description":"List and create organization-level custom field definitions for contacts"}],"servers":[{"url":"https://api.agentalk.io","description":"Agentalk API"}],"security":[{"OrganizationApiToken":[]}],"components":{"securitySchemes":{"OrganizationApiToken":{"type":"http","scheme":"bearer","bearerFormat":"OrgId.SecretToken","description":"**Organization API Token.**\n\nPaste **only** your token in the field below — the `Bearer ` prefix is added automatically by the docs UI and in every generated code sample. The final header sent is:\n\n```\nAuthorization: Bearer {orgId}.{secretToken}\n```\n\nToken format: `{orgId}.{secretToken}` — example: `15c94c3c-1873-4a09-bfbb-03357c29ea50.abc123xyz`.\n\nJWT tokens are NOT accepted."}}},"paths":{"/api/account/custom-fields":{"post":{"operationId":"account_custom_fields_create","description":"Create a new custom field definition at organization level. The key will be used as 'custom.{key}' when setting values on contacts.","summary":"Create Custom Field","tags":["Custom Fields"],"requestBody":{"content":{"application/json":{"schema":{"type":"object","properties":{"key":{"type":"string","description":"Field key (required, used as custom.key)"},"label":{"type":"string","description":"Display label (required)"},"type":{"type":"string","enum":["text","number","date","boolean","single_select","multi_select"],"description":"Field type"},"options":{"type":"array","items":{"type":"string"},"description":"Options for select types"}},"required":["key","label"]}}}},"responses":{"201":{"content":{"application/json":{"schema":{"type":"object","additionalProperties":{}}}},"description":"Custom field created successfully"},"409":{"content":{"application/json":{"schema":{"type":"object","additionalProperties":{}}}},"description":"Custom field with this key already exists"}}}}}}
````


---

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