Walmart Affiliate API vs Etsy Open 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. Etsy Open API is Etsy's REST API for listings, shops, inventory and orders on the Etsy marketplace.
The short answer
- Walmart Affiliate API: Affiliate publishers in the Impact network who want live Walmart.com prices and availability with tracked links.
- Etsy Open API: Searching handmade, vintage and craft listings from independent Etsy sellers.
Side by side
| Walmart Affiliate API | Etsy Open 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. | All active Etsy listings (findAllListingsActive, with keyword search), plus shops and shop listings. |
| Returns | Item data including real-time price and availability; a responseGroup parameter sets which item fields come back. | Listing records including title, price and the full URL of the listing page on Etsy. |
| 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 registered app with an API keystring and shared secret; apps used beyond your own shop go through review (Personal App), and wider use needs a separately approved Commercial Access request. Searching active listings needs only the API key, not OAuth. |
| Acting on a result | Affiliate links: calls carry your Impact Radius publisher ID and you earn referral fees when shoppers buy on Walmart.com. | Buy link: each listing has its Etsy page URL; buying happens on Etsy. |
| Coverage | Walmart.com (United States). | The Etsy marketplace (sellers worldwide). |
| MCP server | No official server listed | Etsy Dev MCP server at https://mcp.api.etsycloud.com/mcp, but it only teaches an assistant the API docs and schemas; it does not call the Etsy API or return listings. |
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 Etsy Open API?
A registered app with an API keystring and shared secret; apps used beyond your own shop go through review (Personal App), and wider use needs a separately approved Commercial Access request. Searching active listings needs only the API key, not OAuth.
Is Etsy Open API free?
Its pages listed no free use when we read them on October 15, 2026.
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.”
Etsy Open API, read on October 15, 2026:
- developer.etsy.com/documentation: “a REST API that extends support for inventory, sales orders, and shop management on the Etsy platform”
- developer.etsy.com/documentation: “Registering an app creates an Etsy App API keystring and a shared secret.”
- developer.etsy.com/documentation: “Personal Apps go through a deeper review process than Seller Apps.”
- developer.etsy.com/documentation: “You must have an approved Personal App before you can request Commercial Access.”
- etsy.com/openapi/generated/oas/3.0.0.json: “A list of all active listings on Etsy paginated by their creation date.”
- etsy.com/openapi/generated/oas/3.0.0.json: “The full URL to the listing's page on Etsy.”
- developer.etsy.com/documentation/essentials/rate-limits: “You can see your application's current rate limits in the”
- developer.etsy.com/documentation/mcp_server/devmcpserver: “Use the Etsy Dev MCP server to teach your AI assistant how to use the Etsy Open API.”
- developer.etsy.com/documentation/mcp_server/devmcpserver: “It does not call the Etsy API directly.”