Walmart Affiliate API vs Rainforest API for AI agents
Walmart Affiliate API is Walmart I/O's set of REST services for affiliates to search Walmart.com products and earn referral fees. Rainforest API is a paid third-party API that returns Amazon search, product, offer and review data in real time.
The short answer
- Walmart Affiliate API: Affiliate publishers in the Impact network who want live Walmart.com prices and availability with tracked links.
- Rainforest API: Getting Amazon product, price and review data without needing Amazon Associates sales.
Side by side
| Walmart Affiliate API | Rainforest API | |
|---|---|---|
| Searches | Text search of the Walmart.com catalogue for items sold online, item lookup by item ID or UPC, taxonomy, reviews, trending items and recommendations; several categories are excluded. | Amazon search results by keyword or category, product pages by ASIN, deals and offers, and reviews. |
| Returns | Item data including real-time price and availability; a responseGroup parameter sets which item fields come back. | Ranked products with ASINs, title and price for searches; full product page data (bullets, descriptions, attributes, variations, category tree) by ASIN. |
| Before the first call | A Walmart.com account to log in to walmart.io, a registered application with an uploaded public key (which creates a consumer ID), and an Impact Radius publisher ID passed on calls. | A Traject Data account and API key. |
| Free | Not stated on its pages | A free trial; the pricing page does not say how many requests it includes. |
| Paid | Not stated on its pages | Hobbyist plan $23 a month billed annually for 500 credits a month ($0.06 per extra credit). |
| Acting on a result | Affiliate links: calls carry your Impact Radius publisher ID and you earn referral fees when shoppers buy on Walmart.com. | Data only; no buy, affiliate or checkout action is described. |
| Coverage | Walmart.com (United States). | Amazon marketplaces worldwide, including US, UK, DE, FR, CA and IN. |
| MCP server | No official server listed | No official server listed |
Where Openpath fits
Openpath has no products listed yet. Sellers can list a product on Openpath today, free, and agents will find it through the same search as jobs and businesses. Get listed.
Questions people ask
What do I need before I can use Walmart Affiliate API?
A Walmart.com account to log in to walmart.io, a registered application with an uploaded public key (which creates a consumer ID), and an Impact Radius publisher ID passed on calls.
Is Walmart Affiliate API free?
Its pages listed no free use when we read them on October 15, 2026.
What do I need before I can use Rainforest API?
A Traject Data account and API key.
Is Rainforest API free?
A free trial; the pricing page does not say how many requests it includes.
Sources
Every line about another company comes from its own pages. Prices and terms change, so check the source before you rely on one.
Walmart Affiliate API, read on October 15, 2026:
- walmart.io/apidocs/affiliates/introduction: “a useful collection of RESTful services that allow developers to earn referral fees”
- walmart.io/apidocs/affiliates/introduction: “Several categories are excluded from the API calls.”
- walmart.io/apidocs/affiliates/affiliate-marketing-api: “Perform text search on the Walmart.com catalogue and get matching items available for sale online.”
- walmart.io/apidocs/affiliates/affiliate-marketing-api: “Get real time item status including price and availability”
- walmart.io/apidocs/affiliates/affiliate-marketing-api: “Your Impact Radius Publisher Id”
- walmart.io/apidocs/affiliates/quickstart: “After the public key is uploaded, consumer id will be created for your application.”
Rainforest API, read on October 15, 2026:
- trajectdata.com/ecommerce/rainforest-api: “Search by keyword or category and return ranked products with ASINs”
- trajectdata.com/ecommerce/rainforest-api: “Pull complete product page data by ASIN: titles, bullets, descriptions, attributes, variations, category tree, and A+ content.”
- trajectdata.com/ecommerce/rainforest-api: “We support all major Amazon marketplaces including US, UK, DE, FR, CA, IN, and more.”
- docs.trajectdata.com/rainforestapi: “The Product Data API allows you to retrieve data from any Amazon domain worldwide in real-time.”
- trajectdata.com/ecommerce/rainforest-api/pricing: “Absolutely! Start a free trial to see results instantly.”
- trajectdata.com/ecommerce/rainforest-api/pricing: “$23/month ... Billed Annually”
- trajectdata.com/ecommerce/rainforest-api/pricing: “$0.06 per extra credit”