US Cross-Listing CMDB — Amazon, Walmart, eBay on Multilogin

US agencies listing the same brand on Amazon Seller Central, Walmart Marketplace, and eBay US need strict **profile isolation**. Amazon's linked-account detection crosses marketplace boundaries when staff, proxies, or payment rails bleed. This CMDB pattern mirrors the EU cross-listing guide for the US stack.

Golden rule

One Multilogin profile per marketplace login. Never open Amazon + Walmart + eBay in tabs of the same browser profile — even if URLs differ. Link records in CMDB by client_id, not by shared cookies or staff SSO.

CMDB schema (YAML)

client_id: acme_us_brand
brand: Acme Outdoor
region: us

marketplace_profiles:
  - marketplace: amazon_us
    profile_uuid: uuid-a
    proxy: isp_us_ny_sticky_01
    tier: prod
    staff_access: [ops_lead_us]

  - marketplace: walmart_us
    profile_uuid: uuid-b
    proxy: isp_us_tx_sticky_02
    tier: prod
    staff_access: [ops_lead_us]

  - marketplace: ebay_us
    profile_uuid: uuid-c
    proxy: isp_us_ca_sticky_03
    tier: prod
    staff_access: [ops_lead_us]

shared_rules:
  - no_cookie_export_between_profiles
  - no_shared_residential_exit_ip
  - inventory_sync_via_api_not_browser_login

Proxy policy (US)

Marketplace	Proxy type	Notes
Amazon US	Sticky ISP, state matches business address	See sticky vs rotate
Walmart	Separate ISP session — not Amazon subnet	WFS inbound never automated
eBay US	Managed payments geo aligned	Cross-list SKU via API

Queue worker routing

Jobs carry marketplace + client_id. Worker selects profile from profile pool with filters:

{
  "job_id": "uuid",
  "client_id": "acme_us_brand",
  "marketplace": "walmart_us",
  "task": "sync_inventory",
  "profile_id": "uuid-b"
}

Never let the worker pick "any prod profile" — marketplace filter is mandatory.

Ban on one marketplace

Amazon suspension does **not** automatically mean Walmart or eBay are linked — unless CMDB audit shows shared proxy, device fingerprint export, or staff logged into two panels from one machine. Run ban recovery per marketplace; tag only the burned UUID tier=burn.

Automation boundaries

Task	Allowed
Order export, inventory sync	Queue worker
Listing CSV upload	Rate-limited Playwright post-login
Tax / banking / identity verification	Never automate
Walmart WFS inbound labels	Manual only

Amazon Seller Central Walmart Marketplace eBay Seller EU cross-listing CMDB Shopify (DTC) Ban recovery Anti-detect hub

Disclosure: MLX-MMO affiliated with Multilogin. Marketplace Terms apply — CMDB isolation is engineering hygiene, not legal compliance.