Check if value exists in list
Check if a specific value is present in a named list. Returns a boolean result indicating membership. Matching is case-sensitive and exact.
Path Parameters
| Parameter | Type | Required | Description |
|---|---|---|---|
id | UUID | Yes | Named list identifier |
value | string | Yes | Value to check for membership |
Response Fields
| Field | Type | Description |
|---|---|---|
exists | boolean | true if value is in the list, false otherwise |
listName | string | Name of the list checked |
listType | string | Type of the list |
value | string | The value that was checked |
Matching Behavior
- Exact match only (no partial or fuzzy matching)
- Case-sensitive comparison
- List must be ACTIVE for checks to succeed
- Whitespace is significant
Use Cases
- Pre-validate addresses against whitelists before transactions
- Check if an asset is in an approved list
- Verify user membership in approver groups
- Pre-flight validation before policy evaluation
- Build address verification UIs
Required Permission
lists:read
Check if value exists in list
Check if a specific value is present in a named list. Returns a boolean result indicating membership. Matching is case-sensitive and exact.
Path Parameters
| Parameter | Type | Required | Description |
|---|---|---|---|
id | UUID | Yes | Named list identifier |
value | string | Yes | Value to check for membership |
Response Fields
| Field | Type | Description |
|---|---|---|
exists | boolean | true if value is in the list, false otherwise |
listName | string | Name of the list checked |
listType | string | Type of the list |
value | string | The value that was checked |
Matching Behavior
- Exact match only (no partial or fuzzy matching)
- Case-sensitive comparison
- List must be ACTIVE for checks to succeed
- Whitespace is significant
Use Cases
- Pre-validate addresses against whitelists before transactions
- Check if an asset is in an approved list
- Verify user membership in approver groups
- Pre-flight validation before policy evaluation
- Build address verification UIs
Required Permission
lists:read