# Seller Toolbelt Muse connector

From musedirectory.ai, the independent directory of Meta Muse connectors. Not affiliated with Meta.

## Seller Toolbelt

Check product images, calculate marketplace fees, and look up barcodes for Amazon, eBay and Etsy sellers.

- Record: https://musedirectory.ai/connector/seller-toolbelt
- Category: Shopping & Commerce
- Developer: sellertoolbelt.com (https://sellertoolbelt.com/agents)
- Muse status: Extra setup. Not in Muse's Connectors list yet. Muse can still use it: its page gives you a request to paste into Muse.
- Health: Working, 1507ms, checked 2026-10-29T13:51:27Z
- Endpoint: https://sellertoolbelt.com/api/mcp
- Auth: No account needed; Pricing: unknown
- Screening: Screened, no issues found (2026-10-29T13:51:27Z)
- Source: Found in the official MCP Registry (com.sellertoolbelt/mcp) https://registry.modelcontextprotocol.io/v0/servers?search=com.sellertoolbelt%2Fmcp

Validates product images against Amazon, eBay and Etsy requirements, calculates selling fees and profit margins, looks up product details from barcodes, and edits images (background removal, resizing, format conversion, watermarking).

Example request: "Check if my product photo meets Amazon's main image requirements before I upload it."

How to connect: Not in Muse's Connectors list yet, but Muse can still use it. Paste this into Muse: "Use Seller Toolbelt to help me. It is a free service with an MCP server at https://sellertoolbelt.com/api/mcp. It does not need an API key. Ask me before you share anything with it." Muse asks before it shares anything with the app's site. Meta does not review apps used this way, so only use ones you trust. We tested this in the Muse app on September 24, 2026: Muse used an app's link directly this way and returned a live answer.

Tools:
- check_listing_image: Deterministically checks whether a product photo meets the main-image requirements of Amazon, eBay or Etsy (pure white background, product fill, minimum resolution, file format, colour space, borders, aspect ratio, sharpness, stray text/watermarks). Measured from the actual pixel
- calculate_marketplace_fees: Computes selling fees, net profit, margin and ROI for one sale on Amazon, eBay or Etsy from the sale price, shipping and costs. Category sets the default fee rate: amazon: default (15%), electronics (8%), computers (7%), clothing (17%), home (15%), toys (15%), books (15%); ebay: 
- lookup_barcode: Finds product details (title, brand, category, image, description) for a UPC, EAN or GTIN barcode, using open product catalogs (strong for UK/EU groceries, drinks and cosmetics). Free.
- generate_qr_code: Generates a QR code image (PNG) or SVG markup for any text or URL, e.g. for packaging inserts, product labels or invoices. Free.
- make_compliant_main_image: Removes the background, centres and scales the product on pure white, sizes and encodes it to the marketplace spec (Amazon, eBay or Etsy), then re-checks the result and returns the per-rule verdict as proof. Returns a free watermarked preview (≤700px) plus unlock_url: a human ope
- remove_background: Cuts the product out of its background and returns a transparent PNG. Returns a free watermarked preview (≤700px) plus unlock_url: a human opens it to download the full-resolution file for site credits. Then call get_result for the download link.
- change_background_color: Removes the background and places the product on a solid colour: white, light_gray, gray, black, beige, studio_blue, soft_pink, or custom with hex. Returns a free watermarked preview (≤700px) plus unlock_url: a human opens it to download the full-resolution file for site credits.
- resize_for_marketplace: Fits the image onto an exact canvas, padding with white: amazon (2000×2000), ebay (1600×1600), etsy (2000×2000), square (1080×1080), instagram_portrait (1080×1350), story (1080×1920), or custom width/height. Returns a free watermarked preview (≤700px) plus unlock_url: a human ope
- convert_image: Re-encodes an image as jpeg, png, webp, avif at a chosen quality, to change format or shrink file size. JPEG flattens transparency to white. Returns a free watermarked preview (≤700px) plus unlock_url: a human opens it to download the full-resolution file for site credits. Then c
- add_watermark: Stamps text (e.g. "© Your Brand") on an image in a corner, the centre, or tiled diagonally. Returns a free watermarked preview (≤700px) plus unlock_url: a human opens it to download the full-resolution file for site credits. Then call get_result for the download link.
- get_result: Checks a job created by one of the image tools. Returns download_url once a human has unlocked it via unlock_url; otherwise the status, preview_url and unlock_url again. Results expire 24h after creation unless claimed.

Screening checks:
- MCP handshake: pass (Answered in 1507ms)
- Domain against threat feeds (Cloudflare security DNS): pass (sellertoolbelt.com not flagged)
- Published packages against the OSV malicious-package database: n/a (No npm or PyPI package published)
- Hidden instructions or invisible characters in tool text: pass (11 tools read, nothing found)
- Inputs asking for passwords, card numbers or seed phrases: pass (None found)
- Domain and redirects: pass (Domain registered 122 days ago)
- AI review of purpose and tool behavior: pass (No concerns)