Wex Health and Benefits APIs

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Create Plan Year

Header Parameters

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

Body Parameters

namestring Required

Display name of the plan year

start_datestring Required

Start date of the plan year

end_datestring | null

End date of the plan year

statusstring Required

Status of a plan year package

employer_idstring Required

Associated employer ID

Response

201
Object

Plan year created successfully

Response Attributes

etagstring

ETag value for optimistic locking. Use this value in the If-Match header for subsequent update requests.

dataobject Required

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.

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.

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

Unexpected 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

/

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1

Response

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