Sears Holdings was the American holding company behind the Sears and Kmart department store chains. It filed for Chapter 11 in October 2018 and its retail operations were acquired in 2019 by Transform Holdco LLC, which trades as Transformco (Transform SR Brands LLC), the entity that operates Sears.com, Kmart.com and ShopYourWay.com today. The live developer surface carried forward from that estate is the Sears Marketplace Seller API — a versioned XML-over-HTTPS integration for third-party sellers covering catalog and item management, item class and attribute libraries, inventory, pricing, purchase order retrieval, order cancellations, returns and partial or full refunds, ASN and shipment updates, order prep time, installation service items, and remittance, removed-item, content-match and processing reports. Every API is published with a downloadable XSD and a sample XML document, both fetchable without credentials from seller.marketplace.sears.com, and calls are signed with an HMAC-SHA256 authorization header rather than OAuth. There is no OpenAPI, GraphQL, MCP server or A2A agent card on any Sears, Kmart or Transformco host.
Sears Holdings publishes 1 API on the APIs.io network. Tagged areas include Fortune 100, Retail, E-Commerce, Marketplace, and Order Management.
Sears Holdings’ developer surface includes engineering blog, documentation, API reference, getting-started guide, support, signup flow, pricing, and 24 more developer resources.
aid: sears-holdings
name: Sears Holdings
deliveryModel:
model: platform
open_source: false
commercial: true
callable_host: true
label: Commercial marketplace seller-integration API on a vendor-operated host
confidence: medium
source:
- https://marketplace.sears.com/docs/api-guide/
- https://seller.marketplace.sears.com/SellerPortal/api/oms/purchaseorder/v19
generated: '2026-08-28'
method: probed
specificationVersion: '0.23'
x-status: defunct
x-status-detail: Filed Chapter 11 in October 2018; retail operations acquired 2019 by Transform Holdco LLC (Transformco),
which still operates sears.com and the Sears Marketplace API profiled here.
accessModel:
pricing: paid
onboarding: application
trial: false
try_now: false
public: true
label: Public docs, seller-account gated credentials, $39.99/mo program fee plus category commission
confidence: medium
source:
- https://marketplace.sears.com/sell-on-sears/program-fees/
- https://marketplace.sears.com/docs/api-guide/using-sear-marketplace-apis-for-xml-integration/credentials-and-authentication/
generated: '2026-08-28'
method: searched
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/sears-holdings.png
tags:
- Fortune 100
- Retail
- E-Commerce
- Marketplace
- Order Management
- Inventory
- Product Catalog
- Seller Integration
- XML
url: https://raw.githubusercontent.com/api-evangelist/sears-holdings/refs/heads/main/apis.yml
created: '2026-03-24'
modified: '2026-08-28'
maintainers:
- FN: API Evangelist
email: info@apievangelist.com
url: https://apievangelist.com
description: Sears Holdings was the American holding company behind the Sears and Kmart department store chains. It filed
for Chapter 11 in October 2018 and its retail operations were acquired in 2019 by Transform Holdco LLC, which trades as
Transformco (Transform SR Brands LLC), the entity that operates Sears.com, Kmart.com and ShopYourWay.com today. The live
developer surface carried forward from that estate is the Sears Marketplace Seller API — a versioned XML-over-HTTPS integration
for third-party sellers covering catalog and item management, item class and attribute libraries, inventory, pricing, purchase
order retrieval, order cancellations, returns and partial or full refunds, ASN and shipment updates, order prep time, installation
service items, and remittance, removed-item, content-match and processing reports. Every API is published with a downloadable
XSD and a sample XML document, both fetchable without credentials from seller.marketplace.sears.com, and calls are signed
with an HMAC-SHA256 authorization header rather than OAuth. There is no OpenAPI, GraphQL, MCP server or A2A agent card on
any Sears, Kmart or Transformco host.
apis:
- name: Sears Marketplace Seller API
description: Versioned XML-over-HTTPS API for third-party sellers on Sears Marketplace (Sears.com, Kmart.com, ShopYourWay.com).
GET calls export purchase orders, inventory, item classes, attributes, cancellation requests, return requests and remittance/removed-item/content-match
reports; PUT calls import items, inventory, pricing, ASNs, order cancellations, order adjustments (returns and refunds),
order prep time and service-item configurations. Every operation is described by a published XSD. Authorization is an
HMAC-SHA256 signature over "sellerId:emailaddress:timestamp" with a 30-minute timestamp validity.
humanURL: https://marketplace.sears.com/docs/api-guide/
baseURL: https://seller.marketplace.sears.com/SellerPortal/api
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/sears-holdings.png
tags:
- Marketplace
- Order Management
- Inventory
- Product Catalog
- Returns
- Remittance
- XML
properties:
- type: APIReference
url: https://marketplace.sears.com/docs/api-guide/
- type: Documentation
url: https://marketplace.sears.com/docs/
- type: GettingStarted
url: https://marketplace.sears.com/docs/api-guide/using-sear-marketplace-apis-for-xml-integration/
- type: XMLSchema
url: xsd/sears-holdings-rest-oms-export-v19-purchase-order.xsd
- type: Examples
url: examples/_index.yml
- type: Authentication
url: authentication/sears-holdings-authentication.yml
- type: RateLimits
url: rate-limits/sears-holdings-rate-limits.yml
- type: ErrorCatalog
url: errors/sears-holdings-problem-types.yml
- type: Sandbox
url: sandbox/sears-holdings-sandbox.yml
- type: Conventions
url: conventions/sears-holdings-conventions.yml
- type: DataModel
url: data-model/sears-holdings-data-model.yml
- type: Lifecycle
url: lifecycle/sears-holdings-lifecycle.yml
- type: ChangeLog
url: changelog/sears-holdings-changelog.yml
- type: Conformance
url: conformance/sears-holdings-conformance.yml
common:
- type: DomainSecurity
url: security/sears-holdings-domain-security.yml
- type: LinkedIn
url: https://www.linkedin.com/company/transformco
- type: Website
url: https://www.sears.com/
- type: Blog
url: https://www.sears.com//blog
- type: BlogRSS
url: https://www.sears.com//blog/feed/
- type: DeveloperPortal
url: https://marketplace.sears.com/
- type: Documentation
url: https://marketplace.sears.com/docs/
- type: APIReference
url: https://marketplace.sears.com/docs/api-guide/
- type: GettingStarted
url: https://marketplace.sears.com/docs/api-guide/using-sear-marketplace-apis-for-xml-integration/
- type: Support
url: https://marketplace.sears.com/support/
- type: HelpCenter
url: https://marketplace.sears.com/seller-support/
- type: SignUp
url: https://marketplace.sears.com/sell-on-sears/
- type: Login
url: https://marketplace.sears.com/login/
- type: Pricing
url: https://marketplace.sears.com/sell-on-sears/program-fees/
- type: TermsOfService
url: https://marketplace.sears.com/terms-of-use/
- type: PrivacyPolicy
url: https://www.sears.com/en_us/customer-service/policies/privacy-policy.html
- type: Plans
url: plans/sears-holdings-plans-pricing.yml
- type: RateLimits
url: rate-limits/sears-holdings-rate-limits.yml
- type: Authentication
url: authentication/sears-holdings-authentication.yml
- type: ErrorCatalog
url: errors/sears-holdings-problem-types.yml
- type: Conventions
url: conventions/sears-holdings-conventions.yml
- type: DataModel
url: data-model/sears-holdings-data-model.yml
- type: Lifecycle
url: lifecycle/sears-holdings-lifecycle.yml
- type: Deprecation
url: lifecycle/sears-holdings-lifecycle.yml
- type: ChangeLog
url: changelog/sears-holdings-changelog.yml
- type: Conformance
url: conformance/sears-holdings-conformance.yml
- type: Sandbox
url: sandbox/sears-holdings-sandbox.yml
- type: LLMsTxt
url: llms/sears-holdings-llms.txt
- type: AgentSkill
url: skills/_index.yml
- type: XMLSchema
url: xsd/_index.yml
- type: Packages
url: packages/sears-holdings-packages.yml
x-pointer-verification:
checked: '2026-08-28'
method: probed
note: Every common[] and properties[] URL in this file was fetched on 2026-08-28 with a browser User-Agent and its status
recorded. Two pointers were removed as confirmed dead and replaced.
removed:
- type: Website
url: https://www.sears-holdings.com
status: 0
reason: TLS handshake fails outright - the host presents a certificate for transformco.com whose subjectAltName does not
match, so no browser can reach it either. Repointed at https://www.sears.com/ (200).
- type: Blog
url: http://www.searsholdings.com/blog/feed
status: 200
reason: Served, but only over plain HTTP (the same TLS failure applies) and it returns the Transformco blog feed under
a Sears Holdings hostname. Repointed at https://www.sears.com//blog (200) and https://www.sears.com//blog/feed/ (200).
probed:
- url: https://www.sears.com/
status: 200
- url: https://www.sears.com//blog
status: 200
- url: https://www.sears.com//blog/feed/
status: 200
- url: https://www.linkedin.com/company/transformco
status: 200
- url: https://marketplace.sears.com/
status: 200
- url: https://marketplace.sears.com/docs/
status: 200
- url: https://marketplace.sears.com/docs/api-guide/
status: 200
- url: https://marketplace.sears.com/docs/api-guide/using-sear-marketplace-apis-for-xml-integration/
status: 200
- url: https://marketplace.sears.com/support/
status: 200
- url: https://marketplace.sears.com/seller-support/
status: 200
- url: https://marketplace.sears.com/sell-on-sears/
status: 200
- url: https://marketplace.sears.com/login/
status: 200
- url: https://marketplace.sears.com/sell-on-sears/program-fees/
status: 200
- url: https://marketplace.sears.com/terms-of-use/
status: 200
- url: https://www.sears.com/en_us/customer-service/policies/privacy-policy.html
status: 200
- url: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/sears-holdings.png
status: 200
- url: https://seller.marketplace.sears.com/SellerPortal/api/oms/purchaseorder/v19
status: 200
not_emitted:
- type: GitHubOrganization
candidate: https://github.com/transformco
status: 200
reason: The org exists but has zero public repositories, no name, no linked website and nothing tying it to Transform
SR Brands. Ownership could not be established, so no pointer was emitted rather than asserting one.
- type: StatusPage
reason: No status page exists; status.sears.com does not resolve.
- type: Security
reason: probe-security-programs.py found no security.txt, disclosure page or bug bounty.
- type: Compliance
reason: No certifications or compliance program published on any public surface.
- type: WellKnown
reason: Every /.well-known/ path on every host returned 404 or 403. See well-known/.
- type: AgentCard
reason: No agent card served at either well-known path on any host.
- type: MCPServer
reason: No MCP server exists; mcp/ holds a derived candidate surface only.
- type: SDKs
reason: No first-party client library exists in any registry.
- type: Idempotency
reason: The API has no idempotency mechanism; conventions/ records this as unsupported.
x-enrichment:
date: '2026-08-28'
status: enriched
artifacts_added: 79
pass: local-v1
Kin Score
How this is scored →