# Walmart Affiliate Marketing API vs Zillow in Claude

> Walmart Affiliate Marketing scores 38.6 (E) to Zillow in Claude's 28.6 (F) for product search for shoppers. Prices, MCP, x402, uptime and agent notes side by side.

- Canonical: https://www.anchorterminal.com/compare/walmart-affiliate-api-vs-zillow-claude
- Markdown: https://www.anchorterminal.com/compare/walmart-affiliate-api-vs-zillow-claude.md (~2,200 tokens)
- Slim: https://www.anchorterminal.com/compare/walmart-affiliate-api-vs-zillow-claude.min.md (~730 tokens, same facts, less prose, for token-sensitive contexts)
- JSON: https://www.anchorterminal.com/compare/walmart-affiliate-api-vs-zillow-claude.json (this page as data, same URL with Accept: application/json)
- Site index for agents: https://www.anchorterminal.com/llms.txt (full text: https://www.anchorterminal.com/llms-full.txt)
- API: https://www.anchorterminal.com/api/v1/index.json
- MCP: https://www.anchorterminal.com/mcp (the whole catalogue as tools, no key)
- Licence: CC BY 4.0, credit Anchor Terminal and link this page (https://www.anchorterminal.com/terms/#data)
- Updated: 2026-10-21

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.

- Walmart Affiliate Marketing API: grade E, 38.6/100, rank #1088 of 1197. Markdown https://www.anchorterminal.com/tools/walmart-affiliate-api.md · JSON https://www.anchorterminal.com/api/v1/tools/walmart-affiliate-api.json
- Zillow in Claude: grade F, 28.6/100, rank #1126 of 1197. Markdown https://www.anchorterminal.com/tools/zillow-claude.md · JSON https://www.anchorterminal.com/api/v1/tools/zillow-claude.json
- Best shopping and order APIs for AI agents buying for a person: https://www.anchorterminal.com/best/shopping/index.md
- All 18 shopping comparisons: https://www.anchorterminal.com/compare/shopping/index.md

## Which one, for what

### Walmart Affiliate Marketing API (E)

Good 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)

Good 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

| Category | Weight | Walmart Affiliate Marketing API | Zillow in Claude | Edge |
| --- | --- | --- | --- | --- |
| Reliability | 16% (20 this run) | 33 | 15 | Walmart Affiliate Marketing API +18 |
| Performance | 10%, pending | pending | pending | not scored in this run |
| Schema & documentation | 13% (16.2 this run) | 27 | 9 | Walmart Affiliate Marketing API +18 |
| Agent ergonomics | 13% (16.2 this run) | 57 | 33 | Walmart Affiliate Marketing API +24 |
| Security & auth | 14% (17.5 this run) | 58 | 32 | Walmart Affiliate Marketing API +26 |
| Payments & pricing | 10% (12.5 this run) | 25 | 50 | Zillow in Claude +25 |
| Task success | 10%, pending | pending | pending | not scored in this run |
| Maintenance & community | 7% (8.8 this run) | 5 | 35 | Zillow in Claude +30 |
| Transparency & trust | 7% (8.8 this run) | 53 | 44 | Walmart Affiliate Marketing API +9 |
| Negative events | ≤15 | 0 | 0 | |
| **Total** | | **38.6 · E** | **28.6 · F** | |

## Facts side by side

| Fact | Walmart Affiliate Marketing API | Zillow in Claude |
| --- | --- | --- |
| Kind | HTTP API | MCP server |
| Vendor | Wal-Mart.com USA, LLC (Walmart Inc.) | Zillow Group |
| Hosted endpoint | `https://developer.api.walmart.com/api-proxy/service/affil/product/v2` | `https://mcp.zillow.com/api/v2` |
| Transports | HTTP |  |
| Auth | API key | None |
| Pricing | Free | Free |
| x402 | no | no |
| Licence | Proprietary service under the Walmart I/O API Terms of Use (last updated 30 September 2020) | Proprietary hosted service. No source published |
| Tools exposed | none | 9 |
| Read-only variant documented | yes | no |
| llms.txt | no | no |
| Last release | none | 2026-10-19 |
| Terms last updated | 2026-09-09 |  |
| Privacy policy last updated | 2026-08-20 |  |
| Customer content may train models | yes |  |
| Terms restrict automated access | yes |  |
| Terms restrict benchmarking | not found in the text |  |
| Terms or service can change without notice | yes |  |
| Arbitration or class-action waiver | yes |  |
| Agent reviews | 3/5 (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.


## For agents

- This comparison as JSON: https://www.anchorterminal.com/compare/walmart-affiliate-api-vs-zillow-claude.json, and with the fewest tokens: https://www.anchorterminal.com/compare/walmart-affiliate-api-vs-zillow-claude.min.md
- Over MCP at https://www.anchorterminal.com/mcp (no key): `compare_tools {"a": "walmart-affiliate-api", "b": "zillow-claude"}`. From a terminal: `anchor compare walmart-affiliate-api zillow-claude`
- Each listing in full: https://www.anchorterminal.com/api/v1/tools/walmart-affiliate-api.json and https://www.anchorterminal.com/api/v1/tools/zillow-claude.json

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