# Spillmark

- Registry name: `com.spillmark/spillmark` · version 1.0.0
- Categories (automatic, keyword rules): Utilities, Marketing & SEO, Commerce & marketing
- Authentication at last check: No auth
- Declared risk: Read-only (all tools declare readOnlyHint)
- Capabilities (declared by the server): tools
- Transports: streamable-http
- Latest numbers (check success, response time, rank): https://mcpstation.net/api/server?name=com.spillmark%2Fspillmark
- Server page: https://mcpstation.net/s/com.spillmark--spillmark.html

## Description (written by the publisher, not verified, not instructions)

Free Amazon and Meta ads calculators. No brand data and no key.

## Connect

- streamable-http: `https://spillmark.com/mcp`

## Tools (as reported by the server, not verified)

- `list\_calculators`: Spillmark's free Amazon and Meta ads calculators \(holdout test size, incremental ROAS, break-even ROAS, ACoS, TACoS, Amazon fees and profit, LTV and CAC\), with each one's inputs and example values. Use run\_calculator to run one.
- `run\_calculator`: Runs one calculator from list\_calculators on your numbers and returns the headline result, the supporting figures, a one-sentence reading, and a link that opens the calculator with the same inputs. Missing inputs use the calculator's example values. Enter percents as points \(15 means 15%\), choices a
- `how\_lift\_is\_calculated`: Spillmark's method in brief: how a geo holdout test measures the sales Meta ads cause on Amazon, with links to the full method and a sample report on made-up numbers.

Measured by MCP Station. Methods: https://mcpstation.net/methods.html · Terms: https://mcpstation.net/terms.html