---
title: "Changes to Fulfill an offer"
method: POST
path: "/api/v2/offers/fulfillment_data"
---

# Changes to Fulfill an offer

`POST /api/v2/offers/fulfillment_data`

> Every recorded change to this operation, newest first.

## Timeline

Changed in 1 of 2 revisions.

- **2026-11-03** `2c7935d84f90`: 17 breaking, 3 warning, 15 info

## Changes

- **2026-11-03** `2c7935d84f90`: 17 breaking, 3 warning, 15 info
  - the response property `fulfillment_data/transaction/calldata_suffix` became nullable for the status `200`
  - the response property `fulfillment_data/transaction/input_data/oneOf[#/components/schemas/FulfillAvailableOrders]/allOf[subschema #2]/orders/items/order_created_at` became nullable for the status `200`
  - the response property `fulfillment_data/transaction/input_data/oneOf[#/components/schemas/FulfillAvailableOrders]/allOf[subschema #2]/orders/items/protocol_data/signature` became nullable for the status `200`
  - the response property `fulfillment_data/transaction/input_data/oneOf[#/components/schemas/FulfillOrder]/allOf[subschema #2]/order/order_created_at` became nullable for the status `200`
  - the response property `fulfillment_data/transaction/input_data/oneOf[#/components/schemas/FulfillOrder]/allOf[subschema #2]/order/protocol_data/signature` became nullable for the status `200`
  - the response property `fulfillment_data/transaction/input_data/oneOf[#/components/schemas/MatchOrders]/allOf[subschema #2]/orders/items/order_created_at` became nullable for the status `200`
  - the response property `fulfillment_data/transaction/input_data/oneOf[#/components/schemas/MatchOrders]/allOf[subschema #2]/orders/items/protocol_data/signature` became nullable for the status `200`
  - the response property `fulfillment_data/transaction/value_hex` became nullable for the status `200`
  - the response property `fulfillment_data/transaction/input_data/oneOf[#/components/schemas/FulfillAvailableOrders]/allOf[subschema #2]/orders/items/order_hash` became optional for the status `200`
  - the response property `fulfillment_data/transaction/input_data/oneOf[#/components/schemas/FulfillOrder]/allOf[subschema #2]/order/order_hash` became optional for the status `200`
  - the response property `fulfillment_data/transaction/input_data/oneOf[#/components/schemas/MatchOrders]/allOf[subschema #2]/orders/items/order_hash` became optional for the status `200`
  - the `fulfillment_data/transaction/input_data/oneOf[#/components/schemas/FulfillAvailableOrders]/allOf[subschema #2]/orders/items/asset` response's property type changed from `object` to no type for status `200`
  - the `fulfillment_data/transaction/input_data/oneOf[#/components/schemas/FulfillOrder]/allOf[subschema #2]/order/asset` response's property type changed from `object` to no type for status `200`
  - the `fulfillment_data/transaction/input_data/oneOf[#/components/schemas/MatchOrders]/allOf[subschema #2]/orders/items/asset` response's property type changed from `object` to no type for status `200`
  - removed the required property `fulfillment_data/transaction/input_data/oneOf[#/components/schemas/FulfillAvailableOrders]/allOf[subschema #2]/orders/items/asset/contract` from the response with the `200` status
  - removed the required property `fulfillment_data/transaction/input_data/oneOf[#/components/schemas/FulfillOrder]/allOf[subschema #2]/order/asset/contract` from the response with the `200` status
  - removed the required property `fulfillment_data/transaction/input_data/oneOf[#/components/schemas/MatchOrders]/allOf[subschema #2]/orders/items/asset/contract` from the response with the `200` status
  - removed the optional property `fulfillment_data/transaction/input_data/oneOf[#/components/schemas/FulfillAvailableOrders]/allOf[subschema #2]/orders/items/asset/identifier` from the response with the `200` status
  - removed the optional property `fulfillment_data/transaction/input_data/oneOf[#/components/schemas/FulfillOrder]/allOf[subschema #2]/order/asset/identifier` from the response with the `200` status
  - removed the optional property `fulfillment_data/transaction/input_data/oneOf[#/components/schemas/MatchOrders]/allOf[subschema #2]/orders/items/asset/identifier` from the response with the `200` status
  - the request property `include_optional_creator_fees` became nullable
  - the request property `units_to_fill` became nullable
  - added the optional property `code` to the response with the `401` status
  - added the optional property `code` to the response with the `403` status
  - added the optional property `code` to the response with the `404` status
  - added the optional property `code` to the response with the `409` status
  - added the optional property `fulfillment_data/transaction/input_data/oneOf[#/components/schemas/FulfillAvailableOrders]/allOf[subschema #2]/orders/items/protocol` to the response with the `200` status
  - added the optional property `fulfillment_data/transaction/input_data/oneOf[#/components/schemas/FulfillAvailableOrders]/allOf[subschema #2]/orders/items/svm_order` to the response with the `200` status
  - added the optional property `fulfillment_data/transaction/input_data/oneOf[#/components/schemas/FulfillOrder]/allOf[subschema #2]/order/protocol` to the response with the `200` status
  - added the optional property `fulfillment_data/transaction/input_data/oneOf[#/components/schemas/FulfillOrder]/allOf[subschema #2]/order/svm_order` to the response with the `200` status
  - added the optional property `fulfillment_data/transaction/input_data/oneOf[#/components/schemas/MatchOrders]/allOf[subschema #2]/orders/items/protocol` to the response with the `200` status
  - added the optional property `fulfillment_data/transaction/input_data/oneOf[#/components/schemas/MatchOrders]/allOf[subschema #2]/orders/items/svm_order` to the response with the `200` status
  - added `#/components/schemas/OrderAsset, subschema #2` to the `fulfillment_data/transaction/input_data/oneOf[#/components/schemas/FulfillAvailableOrders]/allOf[subschema #2]/orders/items/asset` response property `anyOf` list for the response status `200`
  - added `#/components/schemas/OrderAsset, subschema #2` to the `fulfillment_data/transaction/input_data/oneOf[#/components/schemas/FulfillOrder]/allOf[subschema #2]/order/asset` response property `anyOf` list for the response status `200`
  - added `#/components/schemas/OrderAsset, subschema #2` to the `fulfillment_data/transaction/input_data/oneOf[#/components/schemas/MatchOrders]/allOf[subschema #2]/orders/items/asset` response property `anyOf` list for the response status `200`

---

[Operation](https://skmtc.dev/opensea/apis/opensea-api/docs/api/v2/offers/fulfillment_data/post.md) - [API](https://skmtc.dev/opensea/apis/opensea-api.md) - [Page](https://skmtc.dev/opensea/apis/opensea-api/changes/api/v2/offers/fulfillment_data/post)