com.spillmarkPublished by spillmark.comOfficial publisherv1.0.1Updated Nov 7, 2026
Read-only Amazon profit, fee, ACoS, and geo-holdout MCP tools for Claude, ChatGPT, and agents.
Read-only Spillmark tools for Amazon seller profit, fees, ACoS, TACoS and geo-holdout incrementality calculators, plus an optional brand record.
Web executable via Streamable HTTP. Remote servers run from the web runtime once configured in a workspace.
Paste this prompt into Claude Code, Codex, Cursor or another agent — or into SourceWeft chat. The agent reads this server's install guide, shows you its publisher, endpoint and sign-in, and adds it to your client once you agree. Keys never go into a command.
Read https://sourceweft.com/mcp/com.spillmark%2Fspillmark/install.md and connect the MCP server it describes to my client. Before changing any config, show me its publisher, endpoint and sign-in method and wait for my OK. Never put an API key in a command or in a file I would commit; ask me where it should come from.Add this to your client's mcpServers config.
{
"mcpServers": {
"spillmark": {
"type": "http",
"url": "https://spillmark.com/mcp"
}
}
}Remote Model Context Protocol server for Spillmark.
Spillmark's MCP server at https://spillmark.com/mcp is read-only today. Public Amazon profit, referral/FBA fee, ACoS, TACoS, and geo-holdout calculators require no key. An optional sm_... brand key reads a brand's own profit and incrementality record. Amazon Ads API write tools are on the roadmap.
https://spillmark.com/mcp (Streamable HTTP)com.spillmark/spillmarkThis repository is the public listing package: registry and directory manifests, install snippets, and assets.
.cursor/mcp.json or .mcp.json)Add a custom connector / MCP server with URL https://spillmark.com/mcp.
This repo includes gemini-extension.json and GEMINI.md. The extension connects to https://spillmark.com/mcp.
Create a read-only key in Spillmark Settings -> Agent access, then send:
Authorization: Bearer sm_...
The key reads that brand's own profit and incrementality record. No tool changes ads, budgets, orders, or settings. Public calculators work without a key.
Marketing, advertising, Amazon Ads, seller profit, referral and FBA fees, ACoS, TACoS, geo-holdout, incrementality, calculators, e-commerce.
Source: README.md at commit c7df86d
List Spillmark's free calculators
Spillmark's free Amazon and Meta ads calculators (holdout test size, brand-size MDE, geo holdout states, ad waste, Meta ROAS reality check, 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.
qRun a Spillmark 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 as the option index.
slugrequiredinputscurrencyHow Spillmark calculates lift
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.
Takes no parameters.
100% of the applicable checks met
How complete this listing is, computed from the registry entry, the endpoint and public sources. Not a rating of the server and not a statement that it is safe or working today: reachability is a dated check, and no installs or reviews go into the score.
{ "mcpServers": { "spillmark": { "url": "https://spillmark.com/mcp" } }}claude mcp add --transport http spillmark https://spillmark.com/mcp