# Update a delivery option

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Replace the configuration of an existing delivery option. Option names must remain unique within a configuration; renaming an option to a name already in use returns a 409 Conflict.

Endpoint: PUT /v2/checkout_rates/{config_id}/options/{option_id}
Version: 2.0.0
Security: api_keys

## Path parameters:

  - `config_id` (string, required)
    The unique identifier of the checkout rates configuration.
    Example: "a1b2c3d4-e5f6-7890-abcd-ef1234567890"

  - `option_id` (integer, required)
    The unique identifier of the delivery option.
    Example: 100001

## Request fields (application/json):

  - `name` (string, required)
    The display name of the delivery option. Must be unique within the configuration.
    Example: "Standard Shipping"

  - `type` (string, required)
    The kind of delivery option.
    Enum: "live_rate", "flat_rate", "free", "local_delivery"

  - `services` (array)
    The carrier/service pairings to rate. Applies to live_rate and local_delivery options.

  - `services.carrier_id` (string, required)
    The ID of a carrier connected to your account, in the format se- followed by digits (for example, se-1234567). A value that does not match this format is rejected with a validation error, and a well-formed ID that is not connected to your account is rejected as an invalid identifier.
    Example: "se-1234567"

  - `services.service_code` (string, required)
    The service code of the carrier service to rate (for example, usps_priority_mail). Required for each service; a service code that is not available for the carrier is rejected as an invalid identifier.
    Example: "usps_priority_mail"

  - `fee_mode` (string)
    Whether the fee defined by fee_percentage is added to or subtracted from the carrier rate. Omit for a pass-through rate.
    Enum: "add", "subtract"

  - `fee_percentage` (number)
    The percentage of the carrier rate to add or subtract, according to fee_mode.
    Example: 10

  - `sort_index` (integer)
    The position of this option relative to the others in the configuration, ascending.

  - `fallback_mode` (string)
    What to show when live rates cannot be retrieved. dont_show hides the option; flat_rate shows fallback_rate_amount/fallback_rate_currency; cart_percentage shows fallback_percentage of the cart total.
    Enum: "dont_show", "flat_rate", "cart_percentage"

  - `fallback_rate_amount` (number)
    The fixed fallback price, when fallback_mode is flat_rate.
    Example: 5

  - `fallback_rate_currency` (string)
    The currency of fallback_rate_amount.
    Example: "USD"

  - `fallback_percentage` (number)
    The percentage of the cart total to charge, when fallback_mode is cart_percentage.
    Example: 5

  - `amount` (number)
    The fixed price for a flat_rate option.
    Example: 4.99

  - `currency` (string)
    The currency of amount.
    Example: "USD"

## Response 200 fields (application/json):

  - `option_id` (integer)
    The unique identifier of the delivery option.
    Example: 100001

  - `config_id` (string)
    The identifier of the configuration this option belongs to.
    Example: "a1b2c3d4-e5f6-7890-abcd-ef1234567890"

  - `name` (string)
    The display name of the delivery option.
    Example: "Standard Shipping"

  - `type` (string)
    The kind of delivery option.
    Enum: "live_rate", "flat_rate", "free", "local_delivery"

  - `services` (array)
    The carrier/service pairings rated by this option, when applicable.

  - `fee_mode` (string)
    Whether fee_percentage is added to or subtracted from the carrier rate.
    Enum: "add", "subtract"

  - `fee_percentage` (number)
    The percentage of the carrier rate added or subtracted, according to fee_mode.
    Example: 10

  - `sort_index` (integer)
    The position of this option relative to the others in the configuration, ascending.

  - `fallback_mode` (string)
    What is shown when live rates cannot be retrieved.
    Enum: "dont_show", "flat_rate", "cart_percentage"

  - `fallback_rate_amount` (number)
    The fixed fallback price, when fallback_mode is flat_rate.
    Example: 5

  - `fallback_rate_currency` (string)
    The currency of fallback_rate_amount.
    Example: "USD"

  - `fallback_percentage` (number)
    The percentage of the cart total charged, when fallback_mode is cart_percentage.
    Example: 5

  - `amount` (number)
    The fixed price for a flat_rate option.

  - `currency` (string)
    The currency of amount.
    Example: "USD"

  - `is_active` (boolean)
    Whether the option is active and shown at checkout.
    Example: true

  - `created_at` (string)
    When the option was created.
    Example: "2026-05-15T18:30:00Z"

## Response 400 fields (application/json):

  - `request_id` (string, required)
    A UUID that uniquely identifies the request id.
This can be given to the support team to help debug non-trivial issues that may occur
    Example: "aa3d8e8e-462b-4476-9618-72db7f7b7009"

  - `errors` (array, required)
    The errors associated with the failed API call

  - `errors.error_source` (string, required)
    The source of the error, as indicated by the name this informs us if the API call failed because of the
carrier, the order source, the ShipStation API itself, or the underlying ShipEngine platform.
    Enum: "carrier", "order_source", "ShipStation", "shipengine"

  - `errors.error_type` (string, required)
    The type of error
    Enum: "account_status", "business_rules", "validation", "security", "system", "integrations"

  - `errors.error_code` (string, required)
    The error code specified for the failed API Call
    Enum: "auto_fund_not_supported", "batch_cannot_be_modified", "carrier_conflict", "carrier_disconnected", "carrier_not_connected", "carrier_not_supported", "confirmation_not_supported", "default_warehouse_cannot_be_deleted", "field_conflict", "field_value_required", "forbidden", "identifier_conflict", "identifiers_must_match", "insufficient_funds", "invalid_address", "invalid_billing_plan", "invalid_field_value", "invalid_identifier", "invalid_status", "invalid_string_length", "label_images_not_supported", "meter_failure", "order_source_not_active", "rate_limit_exceeded", "refresh_not_supported", "request_body_required", "return_label_not_supported", "settings_not_supported", "subscription_inactive", "terms_not_accepted", "tracking_not_supported", "trial_expired", "unauthorized", "unknown", "unspecified", "verification_failure", "warehouse_conflict", "webhook_event_type_conflict", "customs_items_required", "incompatible_paired_labels", "invalid_charge_event", "invalid_object", "no_rates_returned", "freight_connection_inactive", "freight_provider_id_required", "freight_shipment_not_found", "freight_tracking_not_available", "freight_tracking_not_found", "freight_shipment_not_batchable"

  - `errors.message` (string, required)
    An error message associated with the failed API call
    Example: "Body of request cannot be null."

  - `errors.field_name` (string)
    The name of the field that caused the error (only present for validation errors)
    Example: "inventory_warehouse_id"

  - `errors.field_value` (string)
    The invalid value that was provided for the field (only present for validation errors)
    Example: "invalid-id"