Wex Health and Benefits APIs

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Add Membership Rule

Header Parameters

X-Request-Idstring

Optional correlation ID for distributed tracing.

Idempotency-Keystring Required

Required client-generated UUID v4 used to deduplicate retried mutating requests (POST, PUT, PATCH, DELETE). Requests without this header are rejected with 400 Bad Request. The first successful (2xx) response is cached for 24h and replays of the same key return the cached response without re-executing the operation.

Authorizationstring

Path Parameters

idstring Required

Employee group external identifier (UUID v4). No internal numeric identifier is exposed on the wire.

Body Parameters

rule_typestring Required

The employee attribute being evaluated (e.g., department, employee_class, division).

Min length
1
Max length
100
operatorstring Required

The comparison operator applied to the attribute value.

Min length
1
Max length
50
rule_valuestring Required

The value the attribute is compared against, always transmitted as a string. For IN/NOT_IN, provide a comma-separated list (e.g., Engineering,Sales). For GREATER_THAN/LESS_THAN, provide a value parseable as the target attribute's underlying type (numeric or date).

Min length
1

Response

201
Object

Created – Membership rule added successfully

Response Attributes

rule_typestring | null

Employee attribute being evaluated.

operatorstring | null

Comparison operator.

rule_valuestring | null

Value the attribute is compared against.

is_activeboolean

Whether this rule is currently active.

created_datestring

ISO 8601 timestamp of rule creation.

updated_datestring

ISO 8601 timestamp of last modification.

condition_ruleobject | null
readOnly

Show child attributes

400
Object

Bad Request – Validation failed. The errors map keys mirror the snake_case JSON property names used in the request payload.

Response Attributes

typestring | null
titlestring | null
statusinteger | null
detailstring | null
instancestring | null
invalid_paramsarray | null

List of invalid parameters that caused the validation error.

Max items
10

Show child attributes

errorsobject

Human-readable validation error messages keyed by field name. Each key maps to one or more error message strings.

Show child attributes

validation_errorsobject

Field-level validation errors keyed by field name. Each key maps to one or more structured error details.

401
Object

Unauthorized – Missing or invalid credentials.

Response Attributes

typestring | null
titlestring | null
statusinteger | null
detailstring | null
instancestring | null
invalid_paramsarray | null

List of invalid parameters that caused the validation error.

Max items
10

Show child attributes

errorsobject

Human-readable validation error messages keyed by field name. Each key maps to one or more error message strings.

validation_errorsobject

Field-level validation errors keyed by field name. Each key maps to one or more structured error details.

403
Object

Forbidden – Insufficient permissions.

Response Attributes

typestring | null
titlestring | null
statusinteger | null
detailstring | null
instancestring | null
invalid_paramsarray | null

List of invalid parameters that caused the validation error.

Max items
10

Show child attributes

errorsobject

Human-readable validation error messages keyed by field name. Each key maps to one or more error message strings.

validation_errorsobject

Field-level validation errors keyed by field name. Each key maps to one or more structured error details.

404
Object

Not Found – Employee record does not exist.

Response Attributes

typestring | null
titlestring | null
statusinteger | null
detailstring | null
instancestring | null
invalid_paramsarray | null

List of invalid parameters that caused the validation error.

Max items
10

Show child attributes

errorsobject

Human-readable validation error messages keyed by field name. Each key maps to one or more error message strings.

validation_errorsobject

Field-level validation errors keyed by field name. Each key maps to one or more structured error details.

409
Object

Conflict – Returned for duplicate-record conflicts and optimistic concurrency version mismatches. See duplicate_record and version_conflict examples.

Response Attributes

typestring | null
titlestring | null
statusinteger | null
detailstring | null
instancestring | null
invalid_paramsarray | null

List of invalid parameters that caused the validation error.

Max items
10

Show child attributes

errorsobject

Human-readable validation error messages keyed by field name. Each key maps to one or more error message strings.

validation_errorsobject

Field-level validation errors keyed by field name. Each key maps to one or more structured error details.

429
Object

Too Many Requests – Rate limit exceeded.

Response Attributes

typestring | null
titlestring | null
statusinteger | null
detailstring | null
instancestring | null
invalid_paramsarray | null

List of invalid parameters that caused the validation error.

Max items
10

Show child attributes

errorsobject

Human-readable validation error messages keyed by field name. Each key maps to one or more error message strings.

validation_errorsobject

Field-level validation errors keyed by field name. Each key maps to one or more structured error details.

500
Object

Internal Server Error.

Response Attributes

typestring | null
titlestring | null
statusinteger | null
detailstring | null
instancestring | null
invalid_paramsarray | null

List of invalid parameters that caused the validation error.

Max items
10

Show child attributes

errorsobject

Human-readable validation error messages keyed by field name. Each key maps to one or more error message strings.

validation_errorsobject

Field-level validation errors keyed by field name. Each key maps to one or more structured error details.

default
Object

Internal Server Error.

Response Attributes

typestring | null
titlestring | null
statusinteger | null
detailstring | null
instancestring | null
invalid_paramsarray | null

List of invalid parameters that caused the validation error.

Max items
10

Show child attributes

errorsobject

Human-readable validation error messages keyed by field name. Each key maps to one or more error message strings.

validation_errorsobject

Field-level validation errors keyed by field name. Each key maps to one or more structured error details.

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POST

/

Select
1

Response

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