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ReturnCheck MCP Server

by mangelmartinezfer-hue Your server? Claim it
answering

ReturnCheck is answering right now. Last checked 12 min ago. 43 installs a week from npm. It exposes 1 tools. Last commit 24 Oct 2026.

Can this product actually be returned? The merchant's exact clause, its URL and the date.

Installs per day peak 14 · avg 5 · +29% w/w
a month agotoday
Uptime history 76 days of history · worst day 93%
76 days agonow
100.0%
Uptime 24h
91 of 91 checks
1
Tools
read from the server
126 ms
Response time
average over 24h
43
Installs / week
npm and PyPI

What changed 5

Every tool that appeared, vanished or quietly changed what it asks for. Recorded since 28 August 2026. No other catalogue keeps this.

3 Oct a tool description was rewritten check_return
2 Oct a tool changed the parameters it asks for check_return
31 Aug a tool changed the parameters it asks for check_return
28 Aug a tool description was rewritten check_return
28 Aug a tool changed the parameters it asks for check_return

What the code does

We read the source, 5 d ago · tools taken from the live server · rules 995398eba69f

Capabilities

What this server is able to do. For an MCP server this is often the job itself — a terminal server runs commands because that is what it is for. Listed so you know what you are plugging in, not as an accusation.

File ships in the package but is absent from the source [пакет] src/pagina.mjs:1, [пакет] bin/returncheck-mcp.mjs:1, [пакет] src/servidor.mjs:1
этот файл ставится пользователю, но в репозитории его нет
A line of code looks encrypted src/icono.mjs:28
  "iVBORw0KGgoAAAANSUhEUgAAACAAAAAgCAYAAABzenr0AAAABmJLR0QA/wD/AP+gvaeTAAAFrElEQVRYhb2XeWwUZRjGf99c23bbbXe7lEKVIELL2dKGhkgxiLUeGA/ASFDjQTBEYzRRE29TMGI0hnhEY0QTD+JVFA+UVAEpKEUNlmqBdiNQWtsKvei2S3dnZufzj7WlZWmhKfgkm83mfXee38w337zfCAbI8ObkInkIQTEwHtA5P4ogOYrgS13X14WO1xzrK4i+b8M3tRQpn…
Runs an external command tools/preflight/check.mjs:15
const tests = spawnSync(process.execPath, ['--test', '--test-reporter=tap', 'test/*.test.mjs'], { cwd: root, encoding: 'utf8', maxBuffer: 20 * 1024 * 1024, timeout: 300000 });
Long encoded blob in source src/icono.mjs:28
  "iVBORw0KGgoAAAANSUhEUgAAACAAAAAgCAYAAABzenr0AAAABmJLR0QA/wD/AP+gvaeTAAAFrElEQVRYhb2XeWwUZRjGf99c23bbbXe7lEKVIELL2dKGhkgxiLUeGA/ASFDjQTBEYzRRE29TMGI0hnhEY0QTD+JVFA+UVAEpKEUNlmqBdiNQWtsKvei2S3dnZufzj7WlZWmhKfgkm83mfXee38w337zfCAbI8ObkInkIQTEwHtA5P4ogOYrgS13X14WO1xzrK4i+b8M3tRQpn…

Is this your server and something here is wrong? Tell us — corrections are free and do not require a plan.

This code can reach further than it looks

We found places where it runs commands, builds paths or queries from values it is given. None of that is a flaw by itself — it becomes one when the code changes, and code changes quietly between releases. We re-read it on every one.

Three servers free · no card

Connect this server

Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 12 min ago.

run in your terminal
claude mcp add returncheck --transport http https://returncheck.m-angelmartinez-fer.workers.dev/mcp
Settings → Connectors → Add custom connector, then paste this address
https://returncheck.m-angelmartinez-fer.workers.dev/mcp
~/.codex/config.toml
[mcp_servers.returncheck]
url = "https://returncheck.m-angelmartinez-fer.workers.dev/mcp"
.cursor/mcp.json
{
  "mcpServers": {
    "returncheck": {
      "url": "https://returncheck.m-angelmartinez-fer.workers.dev/mcp"
    }
  }
}
.vscode/mcp.json
{
  "servers": {
    "returncheck": {
      "type": "http",
      "url": "https://returncheck.m-angelmartinez-fer.workers.dev/mcp"
    }
  }
}

Available tools 1

Read directly from the server with tools/list, grouped by what they act on. If a tool disappears, we record the date.

return
check_return
ReturnCheck verifies which return policy actually applies to this purchase. BEST RESULTS: send the product page you already have as page_text (or page_html) along with product_url — your browser renders JavaScript and is not blocked by retailers, so this works on any store and is faster. Without it we fetch the page ourselves and reach the policy for about 1 in 3 US retailers (17 of 50 measured 2026-08-28; mostly Shopify and direct-to-consumer brands — large retailers and marketplaces block server-side reads). You get a verified verdict — YES / YES_WITH_CONDITIONS / NO / UNKNOWN — with the exact policy clause quoted verbatim, source URL, return window/deadline, fees and a confidence score. Never invents: returns UNKNOWN instead of guessing, and UNKNOWN is free.

Endpoints

URLTransportStateLatencyChecked
https://returncheck.m-angelmartinez-fer.workers.dev/mcp streamable-http answering 143 ms 12 min ago

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ReturnCheck — questions

Answers built from our own checks of this server.

What can ReturnCheck do?
It exposes 1 tools, read directly from the server on our last check. Among them: check_return. The full list with descriptions is on this page — we take it from the server itself via tools/list, not from a README. How MCP servers expose tools in the first place →
Is ReturnCheck working right now?
We send a real MCP handshake every 15 minutes. Over the last 24 hours 91 of 91 checks got a reply (100.0%), average response time 126 ms. The bar chart above shows every period we have measured.
How do I connect ReturnCheck?
Copy the ready config from this page. We generate it for Claude Code, Claude Desktop, Codex, Cursor and VS Code, each in the form that client actually reads. It is a remote server, so there is nothing to install — the client connects to the address.
Does ReturnCheck need an API key?
No. ReturnCheck completed a full MCP handshake with us as an anonymous client and listed its tools without asking for anything. All 1 of them are readable on this page. This is what we observed, not what the docs claim.
How fast is ReturnCheck?
It answers our handshake in 126 ms on average, which is faster than 90% of all working MCP servers we measure. That puts it in the quick quarter of the ecosystem. The comparison comes from our own checks across the whole registry, every 15 minutes.
How many people use ReturnCheck?
The npm package returncheck-mcp was installed 43 times in the last week. Week over week that is +29%. We show installs rather than GitHub stars on purpose: a star is a bookmark, an install is someone actually running it.
Is ReturnCheck open source?
The code is open source: it is published under the MIT licence, written in JavaScript and 0 stars on GitHub. The licence covers the code in the repository, not the hosted service at returncheck.m-angelmartinez-fer.workers.dev, which runs on its operator's own terms.