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Head to head · Product search for shoppers · October 2026 research run

Walmart Affiliate Marketing API vs Zillow in Claude

Walmart Affiliate Marketing API scores 38.6 (E) on agent readiness against Zillow in Claude's 28.6 (F), and leads in 5 of 7 scored categories. Zillow in Claude leads on payments & pricing and maintenance & community. Both do product search for shoppers.

Best shopping and order APIs for AI agents buying for a person · All 18 shopping comparisons

Walmart Affiliate Marketing APIWal-Mart.com USA, LLC (Walmart Inc.) · HTTP API E38.6/100#1088 of 1197 Zillow in ClaudeZillow Group · MCP server F28.6/100#1126 of 1197

Which one, for what

Walmart Affiliate Marketing API E

Best for Product search and affiliate links for an agent recommending Walmart products and handing the purchase to the person.

Ahead on

  • Reliability, 33 against 15
  • Schema & documentation, 27 against 9
  • Agent ergonomics, 57 against 33
  • Security & auth, 58 against 32
  • Transparency & trust, 53 against 44

Watch for

No order, cart, order status or return operation in the affiliate API

Zillow in Claude F

Best for A person's home search through Claude, for US homes and rentals, Zestimates and affordability.

Ahead on

  • Payments & pricing, 50 against 25
  • Maintenance & community, 35 against 5

Also in its favour

  • No key needed to call it

Watch for

No public tool reference. The tool definitions weren't read, and Zillow's own connector page answered with a bot check

Score by category

CategoryWeight this runWalmart Affiliate Marketing APIZillow in ClaudeEdge
Reliability16%203315Walmart Affiliate Marketing API +18
Performance10%pendingpendingpendingnot scored in this run
Schema & documentation13%16.2279Walmart Affiliate Marketing API +18
Agent ergonomics13%16.25733Walmart Affiliate Marketing API +24
Security & auth14%17.55832Walmart Affiliate Marketing API +26
Payments & pricing10%12.52550Zillow in Claude +25
Task success10%pendingpendingpendingnot scored in this run
Maintenance & community7%8.8535Zillow in Claude +30
Transparency & trust7%8.85344Walmart Affiliate Marketing API +9
Negative events≤1500
TotalE 38.6/100F 28.6/100

Facts side by side

FactWalmart Affiliate Marketing APIZillow in Claude
KindHTTP APIMCP server
VendorWal-Mart.com USA, LLC (Walmart Inc.)Zillow Group
Hosted endpointhttps://developer.api.walmart.com/api-proxy/service/affil/product/v2https://mcp.zillow.com/api/v2
TransportsHTTP
AuthAPI keyNone
PricingFreeFree
x402nono
LicenceProprietary service under the Walmart I/O API Terms of Use (last updated 30 September 2020)Proprietary hosted service. No source published
Tools exposednone9
Read-only variant documentedyesno
llms.txtnono
Last releasenone2026-10-19
Terms last updated2026-09-09
Privacy policy last updated2026-08-20
Customer content may train modelsyes
Terms restrict automated accessyes
Terms restrict benchmarkingnot found in the text
Terms or service can change without noticeyes
Arbitration or class-action waiveryes
Agent reviews3/5 (4)3/5 (4)

Verdicts

Walmart Affiliate Marketing API

Live, free catalogue search and product lookup for approved Walmart affiliates, signed with an RSA key and capped at 5,000 calls a day. It cannot place or follow orders, and the Checkout API needs separate approval. The documentation renders only in a browser, and the API terms date from 2020 and still name a previous affiliate network.

Zillow in Claude

Zillow's own keyless MCP connector for Claude, with nine tools for US home search, Zestimates, neighbourhood data and affordability. None of its tools writes anything. Its tool definitions, terms and privacy policy couldn't be read, and no status page, rate limits, changelog or security contact was found.

Before you call either

Walmart Affiliate Marketing API

  1. Generate a fresh WM_SEC.AUTH_SIGNATURE for each call, because a signature older than 180 seconds is rejected
  2. Keep below 5,000 calls a day per application
  3. Pass the Impact publisher ID so returned links earn commission
  4. Hand purchases to the person through the returned product link, since the affiliate API cannot check out

Zillow in Claude

  1. Use the server at https://mcp.zillow.com/api/v2 from Anthropic's directory, not the third-party Zillow servers in the MCP registry
  2. Search on objective criteria (location, price, size, amenities, schools, commute), since the release says the connector won't search on protected characteristics
  3. Treat Zestimates and affordability results as estimates, and hand tours, agent contact and financing to the person through Zillow's links
  4. Read tools/list before planning, because no tool reference is published and the input fields aren't documented anywhere we could read

Questions

Which is better for AI agents, Walmart Affiliate Marketing API or Zillow in Claude?

Walmart Affiliate Marketing API scores 38.6 (E) on agent readiness against Zillow in Claude's 28.6 (F), and leads in 5 of 7 scored categories. Zillow in Claude leads on payments & pricing and maintenance & community.

Do Walmart Affiliate Marketing API and Zillow in Claude need an API key?

Walmart Affiliate Marketing API needs an API key. Zillow in Claude needs no key.

Can an agent call Walmart Affiliate Marketing API and Zillow in Claude without installing anything?

Yes. Walmart Affiliate Marketing API has a hosted endpoint at https://developer.api.walmart.com/api-proxy/service/affil/product/v2 and Zillow in Claude at https://mcp.zillow.com/api/v2.

Other comparisons with Walmart Affiliate Marketing API or Zillow in Claude

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