Resale Margin Calculator
https://resale-margintest.weromonit0.workers.dev/mcp ↗
Description
Paid MCP tool for resale fees, net profit, ROI, and break-even price.
What our measurements say
Resale Margin Calculator is a remote MCP server published at resale-margintest.weromonit0.workers.dev. It has been probed 6 times since 9/14/2026. It answered in 6 of them (100.0%), a near-uninterrupted record. Median response time is 543 ms, a delay an agent will notice. It offers a narrow, focused set of 1 tools. On the protocol side it speaks the 2026-07-28 stateless spec.
Agent readability score
Can an LLM agent pick the right tool here — names, descriptions and parameter clarity are assessed.
Agent readability score
Strengths
- Tool name 'resale_margin' directly reflects its purpose of calculating resale margins.
- Description explicitly mentions edge cases (e.g., ROI null for zero purchase price).
Weaknesses
- Parameter descriptions lack context (e.g., 'shipping_cost' could be optional but unclear why).
- No explicit guidance on when to use the tool versus similar financial calculators.
- Error conditions (e.g., negative values) are not explicitly documented.
resale_margin— Parameter 'shipping_cost' and 'selling_fee_percent' lack context for optional usage.resale_margin— No explicit mention of handling invalid inputs (e.g., negative purchase_price).
Verdict
Event narrative
Risk: low
Advice
Schema compliance
tools/list structure, inputSchema validity, and a functional smoke test — the components of the 0-100 score.
- tools/list schema valid
- inputSchema is valid JSON Schema
- Smoke test not run this round
- Cold-start: cold 47ms → warm 47ms (penalty 0ms)
Tools
Tools the server advertised in the latest measurement — measured, not catalog-claimed.
resale_marginCalculate resale selling fee, net profit, ROI, and break-even sale price. Results are rounded to two decimals; ROI is null for zero purchase price and break-even is null when the fee is at least 100 percent.
purchase_pricenumberrequiredsale_pricenumberrequiredshipping_costnumberselling_fee_percentnumber
Availability history
Event log
Derived by comparing consecutive probes — changes in era, protocol version, build and reachability.
- Added to watch — era: Dual-era
Get your badge
Add this badge to your README — it updates automatically as measurements change.
[](https://mcpmetrics.io/servers/io-github-weromon-resale-margin-mcp)<a href="https://mcpmetrics.io/servers/io-github-weromon-resale-margin-mcp"><img src="https://mcpmetrics.io/badge/io.github.weromon/resale-margin-mcp/era.svg" alt="mcpmetrics"></a>You are seeing the last 7 days. Sign up for the full history. Which check failed and why is in the dashboard.
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