Rainforest API vs OpenAI Agentic Commerce Protocol for AI agents
Rainforest API is a paid third-party API that returns Amazon search, product, offer and review data in real time. OpenAI Agentic Commerce Protocol is an open checkout protocol (with Stripe) and OpenAI's specs for merchants to send product feeds to ChatGPT and accept orders from it.
The short answer
- Rainforest API: Getting Amazon product, price and review data without needing Amazon Associates sales.
- OpenAI Agentic Commerce Protocol: Merchants who want their products indexed and sold inside ChatGPT; it gives other agents no product catalog to search.
Side by side
| Rainforest API | OpenAI Agentic Commerce Protocol | |
|---|---|---|
| Searches | Amazon search results by keyword or category, product pages by ASIN, deals and offers, and reviews. | – |
| Returns | 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 Traject Data account and API key. | For merchants: approval to onboard product feeds into ChatGPT (application at chatgpt.com/merchants), then a product feed and checkout endpoints that ChatGPT calls. |
| Free | A free trial; the pricing page does not say how many requests it includes. | – |
| Paid | Hobbyist plan $23 a month billed annually for 500 credits a month ($0.06 per extra credit). | – |
| Acting on a result | Data only; no buy, affiliate or checkout action is described. | Checkout through the protocol: the merchant implements checkout-session endpoints that an agent calls, and stays the seller; OpenAI is not the merchant of record. |
| Coverage | Amazon marketplaces worldwide, including US, UK, DE, FR, CA and IN. | – |
| MCP server | 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 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.
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”
OpenAI Agentic Commerce Protocol, read on October 15, 2026:
- developers.openai.com/commerce/guides/get-started: “Onboarding product feeds in ChatGPT is currently available to approved partners.”
- developers.openai.com/commerce/guides/key-concepts: “OpenAI is not the merchant of record in the Agentic Commerce Protocol.”
- agenticcommerce.dev: “Stripe and OpenAI developed the Agentic Commerce Protocol.”
- agenticcommerce.dev: “Any AI agent can call an ACP-enabled checkout.”