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SellerSonar

SellerSonar is an Amazon listing monitoring and protection platform for sellers, agencies, and brands. It continuously tracks ASINs across all Amazon marketplaces and sends real-time alerts on hijackers, Buy Box loss, listing changes, suppressions, keyword ranks, and competitor activity — no Seller Central connection required.

For agents: Amazon listing monitoring for sellers and brands: alerts on hijackers, Buy Box loss, suppressions, and ranks. Offers an MCP server and developer API.

amazon monitoringbuy box alertslisting protectionhijacker detectionmcp serveramazon api

Their llms.txt

The beginning of the file, from our validated copy saved 2026-10-24T10:29:48.443Z. Cached copy · Source on sellersonar.com

# SellerSonar

> SellerSonar is an Amazon listing monitoring and protection platform for sellers, agencies, and brands. It continuously tracks ASINs across all Amazon marketplaces and sends real-time alerts on hijackers, Buy Box loss, listing changes, suppressions, keyword ranks, and competitor activity — no Seller Central connection required.

SellerSonar was built by Amazon sellers for Amazon sellers. The platform checks listings every 1–4 hours (depending on plan), detects issues within minutes, and delivers alerts via email, in-app, Slack, Trello and webhooks. Core use cases: protecting revenue from hijackers, monitoring Buy Box ownership, catching unauthorized listing changes, tracking keyword rankings, monitoring competitor pricing, tracking review and rating trends, and detecting suppressed listings.

Named capabilities a seller will see in the product: SharkGuard, which watches for hijacked ASINs in marketplaces you do not sell in; a keyword Heatmap showing every tracked keyword against every day, split by organic and sponsored; keyword grouping and an Organic TOP 3 metric; Buy Box Stability, which scores how consistent Buy Box ownership is over a period; Shelf Intelligence for Share of Voice and Share of Shelf; Return Rating signals including Frequently Returned and Kept Item badges; product groups with file-template import; and multi-account with shared or fixed limit allocation. An MCP server connects the data to AI assistants such as Claude and ChatGPT.

Free Business Trial: 14 days, 5 ASINs and 10 keywords, no credit card required. A Full Business Trial ($5 upfront, 14 days) unlocks 500 ASINs and 3,000 keywords. Paid plans: Pro ($19.98/mo annually), Premium ($39.98/mo), Business ($74.98/mo), and Enterprise (custom).

Note on reviews: SellerSonar tracks review volume, rating trends, star-rating changes and Vine reviews, with AI sentiment analysis and top-phrase grouping, and sends review alerts on events such as a new negative review, a review removed or restored, a review edited, a rating change and a new Vine review. There are about 18 selectable review alert types, including separate alerts for a review title and a review body being edited.

Two practical notes. Review data is collected through the SellerSonar Chrome Extension rather than by server-side parsing, so review monitoring is set up by installing the extension, signing in to SellerSonar, and keeping a marketplace tab open with an Amazon buyer or business account logged in, one tab per marketplace. That is what lets SellerSonar read review data without a Seller Central connection. Review data refreshes several times a day, so alerts are near real-time rather than instant at the moment a review posts. Review alerts and review tracking are available from the Premium plan up; see https://sellersonar.com/plans-comparison/ for the current per-plan breakdown.

## Core product pages

- [Homepage](https://sellersonar.com/): Overview of SellerSonar's Amazon monitoring platform
- [P
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Machine-readable: GET /v1/resolve?q=sellersonar.com · GET /v1/domain/sellersonar.com · this page as Accept: application/json or text/markdown · MCP lookup_domain

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Claim my listing on Agent Web Map for sellersonar.com:
1. POST https://agentwebmap.com/v1/sites/sellersonar.com/claims and keep claim_id and claim_secret private.
2. Publish the proof: add the line "AgentWebMap ownership: <token>" (token from step 1) to https://sellersonar.com/llms.txt, or use the DNS, meta-tag or well-known method the response describes.
3. POST https://agentwebmap.com/v1/sites/sellersonar.com/verify with {"claim_id": "...", "claim_secret": "..."}.
4. Save the api_key from the answer; it manages the listing (PATCH https://agentwebmap.com/v1/sites/sellersonar.com).
MCP equivalent: tools begin_ownership_claim, then verify_domain, at https://agentwebmap.com/mcp. Docs: https://agentwebmap.com/docs#verify

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