Comparison · Tested October 3, 2026
Amazon’s Selling Partner plugin vs Agent Central, tested on the same account.
On September 23, Amazon released its Selling Partner plugin, which connects Seller Central to Claude. We put it head to head with Agent Central on the same US seller account: 12 questions sellers actually ask, three runs each, in fresh Claude sessions.
On the sales questions both returned identical figures, down to the cent, so accuracy wasn’t what separated them; coverage and speed were. Amazon’s plugin can’t see Amazon Ads data, so it couldn’t answer the questions about wasted search-term spend or TACOS, and it could only partly answer profit after fees and ad spend. Agent Central answered 11 of the 12 in full and was faster on 7 of the 8 questions both answered in full.
Questions answered in full
11 / 12
Amazon’s plugin: 9 / 12
Median answer time
32.8s
Amazon’s plugin: 42.6s, on the 8 questions both answered in full
Median lookups per answer
5
Amazon’s plugin: 10, across all 12 questions
Inbound shortfall caught
26 units
Amazon’s plugin didn’t report received units
Side by side
What each one covers.
Results
12 questions, three runs each.
Times are medians of completed runs, measured from question to final answer. Lookups are the median number of tool calls per answer.
What were my total sales last week?
Agent Central
Amazon’s plugin
Which search terms spent money but did not convert in the last 30 days?
Agent Central
Amazon’s plugin
What were my sales in the same week last year?
Agent Central
Amazon’s plugin
How does my sales performance last week compare to the same week last year?
Agent Central
Amazon’s plugin
Which of my products are at risk of running out of stock in the next 30 days?
Agent Central
Amazon’s plugin
Do any of my listings have problems right now, like suppressed listings or listing issues?
Agent Central
Amazon’s plugin
What’s the status of my recent FBA inbound shipments?
Agent Central
Amazon’s plugin
What was my TACOS by product over the last 30 days?
Agent Central
Amazon’s plugin
Which products made the most profit last month after Amazon fees and ad spend?
Agent Central
Amazon’s plugin
Did I win the Buy Box on my top 5 products today?
Agent Central
Amazon’s plugin
What were my monthly sales for each of the last 18 months?
Agent Central
Amazon’s plugin
What was my conversion rate by product in March 2025?
Agent Central
Amazon’s plugin
Sales figures
Last week’s sales, last year’s matching week and 18 months of monthly totals came out identical on both, down to the cent. Each assistant said which definition of “last week” it used.
Ads questions
Amazon’s plugin said it has no advertising data. Agent Central listed the search terms that spent without a sale and calculated TACOS by product, noting which ad types Amazon doesn’t split by product.
Profit by product
Amazon’s plugin returned revenue by product and account-level fee totals. Agent Central ranked products by profit after Amazon fees and ad spend and listed what it left out, such as cost of goods.
Inbound shipments
Agent Central compared shipped and received units on every shipment and, in all three runs, found one that had closed 26 units short: a reimbursement claim waiting to be filed.
Stockout risk
Agent Central counts stock held in Amazon Warehousing and Distribution, so it shows how much of the risk you can cover by moving inventory you already own. Amazon’s plugin uses Amazon’s restock forecast.
Listing problems
Both flagged the same listing errors. Agent Central also lets your assistant look at listing health next to sales and ad data in the same conversation.
What Agent Central adds
The questions Amazon’s plugin can’t reach.
Ads next to sales and fees
Search terms, campaigns, ad spend and TACOS sit beside your sales and Amazon fees, so your assistant can answer the questions that cost you money. Amazon’s plugin has no ads data.
Profit by product
Rank products by what they actually made after Amazon fees and ad spend, with what’s excluded spelled out, instead of revenue and an account-wide fee total.
Inbound shipments reconciled
Shipped versus received units for every FBA shipment, so a shipment that closed short shows up before the reimbursement window does.
Ad history that stays
Amazon’s ads reports only reach back 60 to 95 days. Agent Central keeps your ad history for as long as your account is connected, so last year’s Q4 is still there when this year’s starts.
Every marketplace, every assistant
23 marketplaces are included in the price, and the same account works in Claude, ChatGPT, Claude Code and any assistant that supports MCP.
Fewer lookups, faster answers
Agent Central answered with a median of 5 lookups to Amazon’s plugin’s 10, and was faster on 7 of the 8 questions both answered in full.
What Amazon’s plugin does well
- It’s built by Amazon, and you connect it with a Seller Central login in about a minute.
- It reads listing problems live and ships with Amazon-written guidance for fixing them, with every change waiting for your approval.
- Its stockout answers use Amazon’s own restock forecast and suggested quantities.
How we tested
We used one US seller account that we operate, which sells about 1,000 units a week across roughly 50 products and runs Sponsored Products and Sponsored Brands campaigns. Both were connected through the same Claude account, and every session used Claude Opus 5.5. Each question ran in a fresh session with only one of the two connections switched on, and Amazon’s plugin ran with the guidance skills Amazon ships with it.
Neither assistant was allowed to change anything. Each question ran three times on each product, with both answering the same question at the same time so they saw the same data, and we checked the figures against Amazon’s own reports. The test doesn’t cover making changes, Amazon Quick, or assistants other than Claude.
The questions
- 01What were my total sales last week?
- 02Which search terms spent money but did not convert in the last 30 days?
- 03What were my sales in the same week last year?
- 04How does my sales performance last week compare to the same week last year?
- 05Which of my products are at risk of running out of stock in the next 30 days?
- 06Do any of my listings have problems right now, like suppressed listings or listing issues?
- 07What’s the status of my recent FBA inbound shipments?
- 08What was my TACOS by product over the last 30 days?
- 09Which products made the most profit last month after Amazon fees and ad spend?
- 10Did I win the Buy Box on my top 5 products today?
- 11What were my monthly sales for each of the last 18 months?
- 12What was my conversion rate by product in March 2025?
FAQ
Common questions about the two.
Does Amazon’s Selling Partner plugin include advertising data?+
No. Amazon describes it as connecting listings, performance metrics, inventory levels and sales analytics. In our test it said it had no advertising data when asked about search terms, TACOS and ad spend. Agent Central includes Sponsored Products, Sponsored Brands, Sponsored Display and DSP data next to your sales and fees.
Does the Amazon Selling Partner plugin work outside the US?+
Not yet. Amazon launched it in beta for its US stores and says international expansion will follow, without a date. Agent Central works in 23 Amazon marketplaces.
Can I use Amazon’s Selling Partner plugin with ChatGPT?+
At launch it works in Amazon Quick and, in beta, in Claude; Amazon says more integrations will follow. Agent Central works in Claude, ChatGPT, Claude Code and other assistants that support MCP.
Is Amazon’s Selling Partner plugin free?+
Amazon’s announcement doesn’t list a price for the plugin. It does offer primary account holders a free 12-month Amazon Quick Plus subscription if they sign up by December 31, 2026.
How much ad history does each one keep?+
Amazon’s plugin has no ad data, and Amazon’s own ads reports only reach back 60 to 95 days. Agent Central keeps your Amazon Ads history for as long as your account is connected.
Which one answers faster?+
On the 8 questions both answered in full, Agent Central’s median answer time was 32.8 seconds and Amazon’s plugin’s was 42.6 seconds. Agent Central was faster on seven of those eight.
Can I use the Amazon plugin and Agent Central together?+
Yes. Both can be connected to the same Claude account. Claude decides which one to call for each question, so name the one you want if you have a preference.
Ask your assistant the same 12 questions.
Start a 14-day free trial with no card, connect Seller Central and Amazon Ads, and see the answers on your own account.