Free tools for print-on-demand sellers

No account, no email. Each tool runs on its own page, in your agent, or over REST.

Enter or pick an image and see how big it prints at 300 and 150 dpi on the Printful 3001 front area (12 x 16 in).

Printful cost and shipping, Etsy fees (US and Spain) and TikTok Shop fees, with profit, margin and break-even price.

Screen a slogan against a local list of brands and known slogans, then jump to the USPTO and EUIPO searches.

13 tags of 20 characters or fewer and a title of 140 characters or fewer, built from a few keywords.

Profit per order, the most you can pay for ads, break-even ROAS and a delivery-time check for any dropshipped product.

Score a merch niche for specificity, identity pull, gift appeal, staying power and room to rank, with the next step to improve it.

Use these tools from your agent

All 6 tools are public MCP tools and REST endpoints. No key, no account. Fair-use rate limits apply.

print_size_check

Print size checker

pod_profit_calc

Profit calculator

trademark_risk_check

Trademark risk checker

etsy_tags_titles

Etsy tag and title generator

dropship_margin_calc

Dropship margin calculator

niche_validate

Niche validator

claude mcp add --transport http slop-city https://slopship.com/mcp

{
  "mcpServers": {
    "slop-city": {
      "type": "http",
      "url": "https://slopship.com/mcp"
    }
  }
}

curl -s https://slopship.com/api/v1/tools/pod_profit_calc -H 'content-type: application/json' -d '{"price":29.99,"cost":13.25,"shipCost":4.5}'

The REST schema is in openapi.json, the MCP server card in server.json. Tools return JSON.

Are the free tools really free?

Yes. No account, no email, no card. Each tool runs on its own page and as a public MCP tool.

Can my AI agent use them?

Yes. Add the MCP server from the snippet below, or call the REST endpoints. Both are rate limited for fair use.

Pick a plan and your city is ready in minutes.