Category · Everyday APIs
Shopping and order APIs for AI agents buying for a person
Retailers and marketplaces where an agent searches products, compares prices, places orders and follows returns and refunds for a shopper. Compared on product search, whether an order can be placed through an API, order and return status, affiliate and partner terms, and what the retailer allows automated buyers to do.
Best shopping and order APIs for AI agents buying for a person, the shortlist · 8 head-to-head comparisons
Capability keys shopping.search · shopping.orders · shopping.returns · shopping.prices · shopping.affiliate · All tools
letme.dev/shopping.search picks the top-graded tool in this list and says how to call it direct; calling through letme comes later.
The same listing from the live API. Graded results come first, then the official MCP registry when no graded-only filter is set.
https://www.anchorterminal.com/api/v1/searchFilters
| Compare | # | Tool | Category | Grade | Score | Agent rating | p95 | Context | Price / x402 | Auth | Where | Details |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 421 | Etsy Open API v3Etsy, Inc. · HTTP API | Shopping | B | 63.4 | none | n/a | n/a | Free | OAuth or key | Hosted | ||
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Etsy's Open API v3 is a REST API for the Etsy marketplace. Any approved app can search active listings across all shops with an API key, while OAuth covers seller shop, listing and order management. Top strength Public OpenAPI 3.0.2 contract at www.etsy.com/openapi/generated/oas/3.0.0.json with 105 operations, 104 marked General Release Top weakness No cart, checkout, buyer order, return or refund endpoints. Order data is the seller's receipts, behind OAuth |
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| 862 | Amazon Creators APIAmazon.com Services LLC · HTTP API | Shopping | D | 48.7 | none | n/a | n/a | Free | OAuth | Hosted | ||
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Amazon's product catalogue API for Amazon Associates affiliates, replacing Product Advertising API 5.0. It searches and looks up products, prices and variations across 22 Amazon stores and returns tagged affiliate links. It cannot place orders. Top strength The resources parameter returns only the requested fields, and GetItems takes up to 10 ASINs per call Top weakness No order, cart, checkout, order status or return operation |
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| 877 | Instacart Developer Platform API + MCPMaplebear Inc. (Instacart) · HTTP API | Shopping | D | 48.3 | none | n/a | n/a | Free | API key | Hosted | ||
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The Instacart Developer Platform API and its hosted MCP server turn a recipe or shopping list into an Instacart Marketplace page, where the person picks a store and checks out. It also finds nearby retailers by postal code. Top strength Hosted MCP server at https://mcp.instacart.com/mcp with two tools, create-recipe and create-shopping-list, each with typed JSON Schema inputs Top weakness No product search, price, order, order status or return endpoint. The person picks the store and checks out on Instacart |
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| 991 | Best Buy Developer APIBestBuy.com, LLC (Best Buy Co., Inc.) · HTTP API | Shopping | E | 39.1 | none | n/a | n/a | Free | API key | Hosted | ||
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Best Buy's Developer API gives read access to the BESTBUY.COM catalogue, prices, availability, categories, US stores, recommendations and open-box listings with a free API key. Ordering through the Commerce API is invite-only for partners. Top strength Free API key with published limits of 5 calls a second and 50,000 calls a day for Products, Stores, Categories, Recommendations and Buying Options Top weakness Ordering, fulfilment, order lookup and cancellation are only in the Commerce API, which is invite-only with documentation shared after approval |
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| 995 | Walmart Affiliate Marketing APIWal-Mart.com USA, LLC (Walmart Inc.) · HTTP API | Shopping | E | 38.6 | none | n/a | n/a | Free | API key | Hosted | ||
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Walmart's read-only catalogue API for affiliates, documented on the Walmart I/O portal. It searches Walmart.com products and returns item details, reviews, taxonomy, trending items, recommendations and nearby stores, with affiliate links tracked through Impact. It cannot place orders. Top strength Read-only search, lookup by item ID or UPC, reviews, taxonomy, trending items and store lookup in one API Top weakness No order, cart, order status or return operation in the affiliate API |
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Nothing matches these filters. .
p95 latency and context cost come from our probes, which haven't run yet, so those columns start hidden. Grades run from AA to F, and agent-ready means BB or better. Filters, sorting and export run in your browser; the table is complete without JavaScript.
How we test this category
In this run, public evidence against the published checklist. When the task suites run, the same product searched on each listing, an order placed where a sandbox allows, then tracked and returned. We check search results and prices, the order and return steps, refund status and the terms on automated access. This test hasn't run yet, so Task success is pending and the grades here come from the categories assessed from public evidence.
How the ranking works
Every listing is scored 0 to 100 and given a grade from AA to F. In the October 2026 research run, 7 of the 9 weighted categories are scored from public evidence (status history, docs, pricing, terms, source and security pages) against a published checklist, with the reason and sources for every score on the listing. Performance and Task success wait for our probes and task suites, so their weight is shared across the rest until they run. Negative events deduct up to 15 points. Read the methodology.
For companies
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