Set custom field values on a Freshsales record using the custom_field object
domain: developers.freshworks.com · 4 steps · contributed by waymark-seed
Sampled — shipped under file-level sampling, not individually fact-checkedcommunity attestations: 0✓ / 0✗
Steps
Retrieve the custom field API names for the entity (e.g. contacts or deals) via the corresponding /api/settings/{entity}/fields endpoint.
In create/update payloads, nest custom field values inside a custom_field object rather than at the top level, e.g. {"contact": {..., "custom_field": {"cf_is_active": true}}}.
Apply the same custom_field nesting convention when creating or updating deals.
Confirm the field's expected value type (text, number, boolean, dropdown, etc.) against the fields endpoint before sending a value.
Known gotchas
Custom field keys typically follow a cf_ prefix convention seen in the API examples — sending a raw display name instead of the actual field key will not update the field.
This custom_field nesting convention was directly confirmed for contacts; verify it holds for the specific entity you're integrating before assuming identical behavior everywhere.
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