# Seller Toolbelt (remote · sellertoolbelt.com)

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

- Trust score: 68/100 (medium)
- Registry status: active
- Liveness: live
- Owner verified: no
- Last scored: 2026-10-22

## Components

- remote · `sellertoolbelt.com`: 68/100 (this document), [markdown](https://verifymcp.io/servers/com-sellertoolbelt-mcp/api-mcp.md), [page](https://verifymcp.io/servers/com-sellertoolbelt-mcp/api-mcp)

## Channel facts

- Endpoint: `https://sellertoolbelt.com/api/mcp`
- Transports: `streamable-http`
- Auth: `none`
- Version: `1.0.0`

## Trust breakdown

How this component scores in each security and reliability category. Every signal is checked automatically against the live server, and we only credit what we can confirm. Scores are 0–100 per category. Scoring method: https://verifymcp.io/docs/scoring (what has changed: https://verifymcp.io/docs/scoring/changelog)

Scored 2026-10-22.

- **Endpoint Security**: 74/100
  - The endpoint's TLS certificate is valid, in date, and uses a strong key.
  - No authorisation is required to call this server. Every tool declares its destructiveHint and none is destructive, so open access doesn't expose one.
  - HTTPS is enforced; there's no plaintext access path.
  - HSTS check failed: the Strict-Transport-Security header is absent.
  - DNSSEC check failed: this domain isn't protected by DNSSEC.
- **Transport & Reachability**: 100/100
  - Verified streamable-http transport via a live MCP handshake.
- **Schema Quality & AI Usability**: 57/100
  - AI-judged instruction clarity (good).
  - Context-footprint check failed: tool/resource definitions use about 2075 tokens (~188/item across 11 items; 11 tools + 0 resources), over budget; trim descriptions and params.
  - Usage-examples check failed: none of the tools include examples.
- **Stability & Change Management**: 10/100
  - Stability observed for 3 of 30 days with no destabilising changes; credit accrues until the full window elapses.
- **Tool Coverage**: 85/100
  - 100% of tools have a non-trivial description (not blank, and not just the tool's name).
  - 56% of tool parameters carry a description.
- **Tool Safety**: 100/100
  - No prompt-injection markers were found in the server instructions, tool names or descriptions we captured.
  - All 3 tool(s) whose name or description implies an irreversible operation declare an MCP destructiveHint annotation.
  - An AI judge read all 12 captured unit(s) of tool text and found none that tries to manipulate the model reading it.
- **Capabilities**: 100/100
  - Implements a supported MCP spec version (2025-11-25); the latest is 2026-07-28.

## Install

### How do I install the Seller Toolbelt MCP server?

Seller Toolbelt is a hosted endpoint at https://sellertoolbelt.com/api/mcp, so there is nothing to install locally. Ready-made configuration for Claude, Cursor, VS Code, Codex and 5 more is on this page, copied from each client's own documentation.

### Claude

```bash
claude mcp add --transport http com-sellertoolbelt-mcp 'https://sellertoolbelt.com/api/mcp'
```

### Cursor

```json
{
  "mcpServers": {
    "com-sellertoolbelt-mcp": {
      "url": "https://sellertoolbelt.com/api/mcp"
    }
  }
}
```

### VS Code

```json
{
  "servers": {
    "com-sellertoolbelt-mcp": {
      "type": "http",
      "url": "https://sellertoolbelt.com/api/mcp"
    }
  }
}
```

### Codex

```toml
[mcp_servers.com-sellertoolbelt-mcp]
url = "https://sellertoolbelt.com/api/mcp"
```

### opencode

```json
{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "com-sellertoolbelt-mcp": {
      "type": "remote",
      "url": "https://sellertoolbelt.com/api/mcp",
      "enabled": true
    }
  }
}
```

### OpenClaw

```bash
openclaw mcp add com-sellertoolbelt-mcp --url 'https://sellertoolbelt.com/api/mcp' --transport streamable-http
```

### Hermes

```yaml
mcp_servers:
  com-sellertoolbelt-mcp:
    url: "https://sellertoolbelt.com/api/mcp"
```

### Netclaw

```json
{
  "McpServers": {
    "com-sellertoolbelt-mcp": {
      "Transport": "http",
      "Url": "https://sellertoolbelt.com/api/mcp"
    }
  }
}
```

### Vellum

```bash
assistant mcp add com-sellertoolbelt-mcp -t streamable-http -u 'https://sellertoolbelt.com/api/mcp'
```

### Other

```json
{
  "mcpServers": {
    "com-sellertoolbelt-mcp": {
      "type": "http",
      "url": "https://sellertoolbelt.com/api/mcp"
    }
  }
}
```

The mcpServers block is a cross-client convention. Remote transports vary, so check your client's docs.

## Changelog

Every change recorded for this component, newest first. Days that predate change tracking, or that we cannot explain, say so: "we were watching and nothing happened" and "we were not watching" are different claims.

### 2026-10-21 (score 68, +1)

No change was recorded against any check on this day. Stability & Change Management went from 3 to 7. That category is still filling its 30-day observation window: 1 days of observed history at the previous scan, 2 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-10-20 (score 67, 0)

- [functional improvement] Stability: unverified → 0.03

### 2026-10-19 (score 67)

First indexed and scored.

## MCP tools (11)

### `check_listing_image` (~157 tokens)

Check a product image against marketplace rules

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 pixels, not guessed by a vision model. Returns pass / warn / fail with a reason per rule. Use before uploading a listing image. Free.

Input parameters:

- `image_base64` (string): The image as base64 (or a data: URL), max 2 MB. Use only when no public URL is available.
- `image_url` (string): Public https:// URL of the image. Preferred over image_base64.
- `marketplace` (string)

### `calculate_marketplace_fees` (~243 tokens)

Calculate marketplace fees and profit

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: default (13.25%), electronics (9%), books (14.95%), clothing (13.25%); etsy: default (6.5%). Rates are 2026 estimates and vary by region; pass fee_rate_percent to override. Currency-agnostic. Free.

Input parameters:

- `category` (string): Category id for the default fee rate (see description).
- `fba_fee` (number): Amazon FBA fulfilment fee, if any.
- `fee_rate_percent` (number): Override the main fee %.
- `item_cost` (number): Your cost of goods.
- `marketplace` (string, required)
- `sale_price` (number, required)
- `shipping_charged` (number): Shipping the buyer pays you.
- `shipping_cost` (number): Shipping/fulfilment you pay.

### `lookup_barcode` (~59 tokens)

Look up a product by 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.

Input parameters:

- `code` (string, required)

### `generate_qr_code` (~80 tokens)

Generate a 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.

Input parameters:

- `content` (string, required): Text or URL to encode.
- `error_correction` (string)
- `format` (string)
- `size` (integer): PNG width in pixels.

### `make_compliant_main_image` (~216 tokens)

Turn a product photo into a compliant marketplace 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. Without an API key: returns a free watermarked preview (≤700px) plus unlock_url, which a human opens to download the full-resolution file for site credits (then call get_result). With an API key (Authorization: Bearer stb_…): returns download_url for the full-resolution file directly and charges the key owner's credits when the job starts, refunded automatically if processing fails. Retrying a call creates and charges a new job — use get_result to fetch an earlier one.

Input parameters:

- `image_base64` (string): The image as base64 (or a data: URL), max 2 MB. Use only when no public URL is available.
- `image_url` (string): Public https:// URL of the image. Preferred over image_base64.
- `marketplace` (string)

### `remove_background` (~174 tokens)

Remove the background from a product photo

Cuts the product out of its background and returns a transparent PNG. Without an API key: returns a free watermarked preview (≤700px) plus unlock_url, which a human opens to download the full-resolution file for site credits (then call get_result). With an API key (Authorization: Bearer stb_…): returns download_url for the full-resolution file directly and charges the key owner's credits when the job starts, refunded automatically if processing fails. Retrying a call creates and charges a new job — use get_result to fetch an earlier one.

Input parameters:

- `image_base64` (string): The image as base64 (or a data: URL), max 2 MB. Use only when no public URL is available.
- `image_url` (string): Public https:// URL of the image. Preferred over image_base64.

### `change_background_color` (~228 tokens)

Put a product on a solid background colour

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. Without an API key: returns a free watermarked preview (≤700px) plus unlock_url, which a human opens to download the full-resolution file for site credits (then call get_result). With an API key (Authorization: Bearer stb_…): returns download_url for the full-resolution file directly and charges the key owner's credits when the job starts, refunded automatically if processing fails. Retrying a call creates and charges a new job — use get_result to fetch an earlier one.

Input parameters:

- `color` (string)
- `hex` (string): Required when color is "custom", e.g. #f5f1e8.
- `image_base64` (string): The image as base64 (or a data: URL), max 2 MB. Use only when no public URL is available.
- `image_url` (string): Public https:// URL of the image. Preferred over image_base64.

### `resize_for_marketplace` (~253 tokens)

Resize an image for a marketplace or social format

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. Without an API key: returns a free watermarked preview (≤700px) plus unlock_url, which a human opens to download the full-resolution file for site credits (then call get_result). With an API key (Authorization: Bearer stb_…): returns download_url for the full-resolution file directly and charges the key owner's credits when the job starts, refunded automatically if processing fails. Retrying a call creates and charges a new job — use get_result to fetch an earlier one.

Input parameters:

- `height` (integer)
- `image_base64` (string): The image as base64 (or a data: URL), max 2 MB. Use only when no public URL is available.
- `image_url` (string): Public https:// URL of the image. Preferred over image_base64.
- `preset` (string)
- `width` (integer)

### `convert_image` (~212 tokens)

Convert or compress an 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. Without an API key: returns a free watermarked preview (≤700px) plus unlock_url, which a human opens to download the full-resolution file for site credits (then call get_result). With an API key (Authorization: Bearer stb_…): returns download_url for the full-resolution file directly and charges the key owner's credits when the job starts, refunded automatically if processing fails. Retrying a call creates and charges a new job — use get_result to fetch an earlier one.

Input parameters:

- `format` (string)
- `image_base64` (string): The image as base64 (or a data: URL), max 2 MB. Use only when no public URL is available.
- `image_url` (string): Public https:// URL of the image. Preferred over image_base64.
- `quality` (integer)

### `add_watermark` (~224 tokens)

Add a text watermark to an image

Stamps text (e.g. "© Your Brand") on an image in a corner, the centre, or tiled diagonally. Without an API key: returns a free watermarked preview (≤700px) plus unlock_url, which a human opens to download the full-resolution file for site credits (then call get_result). With an API key (Authorization: Bearer stb_…): returns download_url for the full-resolution file directly and charges the key owner's credits when the job starts, refunded automatically if processing fails. Retrying a call creates and charges a new job — use get_result to fetch an earlier one.

Input parameters:

- `color` (string)
- `image_base64` (string): The image as base64 (or a data: URL), max 2 MB. Use only when no public URL is available.
- `image_url` (string): Public https:// URL of the image. Preferred over image_base64.
- `opacity` (integer)
- `position` (string)
- `size` (string)
- `text` (string, required)

### `get_result` (~92 tokens)

Get the status or download link of an image job

Checks a job created by one of the image tools. Returns download_url once it is unlocked (API-key jobs are paid up front; anonymous ones by a human via unlock_url). Otherwise returns the status, preview_url and unlock_url. Never charges. Anonymous results expire 24h after creation unless claimed.

Input parameters:

- `access_token` (string, required): The access_token returned with the job.
- `job_id` (string, required)

## Diagnostics

Captured diagnostic sections: TLS, DNSSEC, Authorisation, Transports. The full working is on the page: https://verifymcp.io/servers/com-sellertoolbelt-mcp/api-mcp#diagnostics

## Score history

- 2026-10-22: 68
- 2026-10-21: 68
- 2026-10-20: 67
- 2026-10-19: 67

## Common questions

### What is the Seller Toolbelt MCP server?

Seller Toolbelt is an MCP server listed in the public MCP registry as com.sellertoolbelt/mcp. Check and fix Amazon, eBay and Etsy product images, calculate marketplace fees, look up barcodes. This page covers its hosted endpoint (https://sellertoolbelt.com/api/mcp).

### Is the Seller Toolbelt MCP server safe to use?

Seller Toolbelt scores 68 out of 100 on VerifyMCP. That is a record of what we were able to check automatically, not an endorsement. The category breakdown on this page shows every signal behind the number, including the ones we could not confirm.

### What tools does the Seller Toolbelt MCP server expose?

Seller Toolbelt exposes 11 tools: check_listing_image, calculate_marketplace_fees, lookup_barcode, generate_qr_code, make_compliant_main_image, and 6 more. Their descriptions and schemas cost roughly 1,938 tokens of context every time the server is loaded.

### Does the Seller Toolbelt MCP server require authentication?

No. We connected to Seller Toolbelt without credentials and it answered, so anything it exposes is reachable by anyone who knows the address.

### Is the Seller Toolbelt MCP server still maintained?

Seller Toolbelt is still listed as active in the MCP registry. We last reached this channel on 22 October 2026. Those dates come from our own scans of the registry and the channel itself, not from anything the publisher announced.

## Links

- Remote endpoint: https://sellertoolbelt.com/api/mcp
- Website: https://sellertoolbelt.com/agents
- Changelog RSS feed: https://verifymcp.io/servers/com-sellertoolbelt-mcp/api-mcp.xml
- Changelog JSON feed: https://verifymcp.io/servers/com-sellertoolbelt-mcp/api-mcp.json
- HTML version of this page: https://verifymcp.io/servers/com-sellertoolbelt-mcp/api-mcp