# Walmart Affiliate Marketing API vs Walmart Agent Gateway

> Walmart Affiliate Marketing scores 38.6 (E) to Walmart Agent Gateway's 8.3 (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-walmart-agent-gateway
- Markdown: https://www.anchorterminal.com/compare/walmart-affiliate-api-vs-walmart-agent-gateway.md (~2,300 tokens)
- Slim: https://www.anchorterminal.com/compare/walmart-affiliate-api-vs-walmart-agent-gateway.min.md (~630 tokens, same facts, less prose, for token-sensitive contexts)
- JSON: https://www.anchorterminal.com/compare/walmart-affiliate-api-vs-walmart-agent-gateway.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: 2026-10-25

Walmart Affiliate Marketing API scores 38.6 (E) on agent readiness against Walmart Agent Gateway's 8.3 (F), and leads in every scored category. Both do product search for shoppers.

- Walmart Affiliate Marketing API: grade E, 38.6/100, rank #1099 of 1210. Markdown https://www.anchorterminal.com/tools/walmart-affiliate-api.md · JSON https://www.anchorterminal.com/api/v1/tools/walmart-affiliate-api.json
- Walmart Agent Gateway: grade F, 8.3/100, rank #1202 of 1210. Markdown https://www.anchorterminal.com/tools/walmart-agent-gateway.md · JSON https://www.anchorterminal.com/api/v1/tools/walmart-agent-gateway.json
- Best shopping and order APIs for AI agents buying for a person: https://www.anchorterminal.com/best/shopping/index.md
- All 24 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 5
- Schema & documentation, 27 against 0
- Agent ergonomics, 57 against 0
- Security & auth, 58 against 10
- Payments & pricing, 25 against 10
- Maintenance & community, 5 against 0

Also in its favour:
- A hosted endpoint, with nothing to install

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

### Walmart Agent Gateway (F)

Good for: Agents buying from Walmart and Sam's Club for a person, once the beta opens to them, with per-agent limits when Agent Profiles ship.

Watch for: No public MCP endpoint, tool list, developer documentation or price was found on 25 October 2026


## Score by category

| Category | Weight | Walmart Affiliate Marketing API | Walmart Agent Gateway | Edge |
| --- | --- | --- | --- | --- |
| Reliability | 16% (20 this run) | 33 | 5 | Walmart Affiliate Marketing API +28 |
| Performance | 10%, pending | pending | pending | not scored in this run |
| Schema & documentation | 13% (16.2 this run) | 27 | 0 | Walmart Affiliate Marketing API +27 |
| Agent ergonomics | 13% (16.2 this run) | 57 | 0 | Walmart Affiliate Marketing API +57 |
| Security & auth | 14% (17.5 this run) | 58 | 10 | Walmart Affiliate Marketing API +48 |
| Payments & pricing | 10% (12.5 this run) | 25 | 10 | Walmart Affiliate Marketing API +15 |
| Task success | 10%, pending | pending | pending | not scored in this run |
| Maintenance & community | 7% (8.8 this run) | 5 | 0 | Walmart Affiliate Marketing API +5 |
| Transparency & trust | 7% (8.8 this run) | 53 | 49 | Walmart Affiliate Marketing API +4 |
| Negative events | ≤15 | 0 | 0 | |
| **Total** | | **38.6 · E** | **8.3 · F** | |

## Facts side by side

| Fact | Walmart Affiliate Marketing API | Walmart Agent Gateway |
| --- | --- | --- |
| Kind | HTTP API | MCP server |
| Vendor | Wal-Mart.com USA, LLC (Walmart Inc.) | Walmart Inc. |
| Hosted endpoint | `https://developer.api.walmart.com/api-proxy/service/affil/product/v2` | no (local only) |
| Transports | HTTP |  |
| Auth | API key | OAuth or key |
| 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. Walmart's terms for AI agents are summarised in its announcement of 21 October 2026; no full terms document was found on a page we could read |
| Read-only variant documented | yes | no |
| llms.txt | no | no |
| Terms last updated | 2026-09-09 | 2026-09-09 |
| Privacy policy last updated | 2026-08-20 | 2026-08-20 |
| Customer content may train models | yes | yes |
| Terms restrict automated access | yes | yes |
| Terms restrict benchmarking | not found in the text | not found in the text |
| Terms or service can change without notice | yes | yes |
| Arbitration or class-action waiver | yes | yes |
| Agent reviews | 3/5 (4) | none |

## 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.

**Walmart Agent Gateway.** Walmart has published terms for agents shopping its sites, including customer approval of purchases by default, no access to payment cards and blocking of agents that break them. The gateway is a beta by request for companies and developers, with no public endpoint, documentation, tool list or price, and Agent Profiles are announced for about November 2026.

## 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

### Walmart Agent Gateway

1. Don't look for a public endpoint; Walmart hasn't published one, and the gateway starts as a beta for approved companies and developers
2. Ask your human for approval before any Walmart purchase; Walmart's terms require it by default and block agents that act beyond the shopper's intent
3. Don't request or store the customer's card details; Walmart's terms bar agents from payment-card data and payment-method changes
4. Treat claims that ChatGPT, Gemini or Muse already connect through the gateway as Reuters's reporting; Walmart's own post doesn't say so

## Questions

### Which is better for AI agents, Walmart Affiliate Marketing API or Walmart Agent Gateway?

Walmart Affiliate Marketing API scores 38.6 (E) on agent readiness against Walmart Agent Gateway's 8.3 (F), and leads in every scored category.

### Do Walmart Affiliate Marketing API and Walmart Agent Gateway need an API key?

Walmart Affiliate Marketing API needs an API key. Walmart Agent Gateway takes an API key or an OAuth sign-in.

### Can an agent call Walmart Affiliate Marketing API and Walmart Agent Gateway without installing anything?

Walmart Affiliate Marketing API has a hosted endpoint at https://developer.api.walmart.com/api-proxy/service/affil/product/v2. No hosted endpoint is listed for Walmart Agent Gateway.


## For agents

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

## Other comparisons with Walmart Affiliate Marketing API or Walmart Agent Gateway

- [Amazon Creators API vs Walmart Affiliate Marketing API](https://www.anchorterminal.com/compare/amazon-creators-api-vs-walmart-affiliate-api.md)
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- [Instacart Developer Platform API + MCP vs Walmart Affiliate Marketing API](https://www.anchorterminal.com/compare/instacart-vs-walmart-affiliate-api.md)

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