ReturnCheck MCP

ReturnCheck verifies which return policy applies to a purchase by returning a structured verdict (YES, YES_WITH_CONDITIONS, NO, or UNKNOWN) along with the exact policy clause, source URL, and verification date. It is designed for AI shopping agents to audit return eligibility without guessing.

Package and access

Local package with source-attributed installation metadata. Koskamo does not execute packages during review.

Community listingLocal stdioSource reviewed; not executedPublished by mangelmartinezfer-hue

You need:Sign up for an API key (free credit): POST https://returncheck.m-angelmartinez-fer.workers.dev/v1/signup

Vendor documentation

What you can do with it

Verify return eligibility for a specific product URL and buyer country
Retrieve the exact policy clause quoted from the merchant's page
Check return window and confidence score for a purchase
Handle cases where evidence is insufficient by returning UNKNOWN

Source and maintenance

Community listingRegistry 1.1.0

mcp-registry: io.github.mangelmartinezfer-hue/returncheck@1.1.0 Source repository Project website

Maintenance checked: Oct 31, 2026, 10:59 PM UTC

Packages and installation

Source-provided package data. Koskamo has not executed or live-probed this package.

returncheck-mcp 0.1.1

npm

returncheck-mcp package definition

{
  "version": "0.1.1",
  "transport": "stdio",
  "identifier": "returncheck-mcp",
  "registryType": "npm",
  "environmentVariables": [
    {
      "name": "RETURNCHECK_API_KEY",
      "format": "string",
      "description": "Optional API key. Without it you get the keyless free trial."
    },
    {
      "name": "RETURNCHECK_URL",
      "format": "string",
      "description": "Service endpoint. Defaults to the hosted service; change it only if you self-host."
    },
    {
      "name": "RETURNCHECK_FETCH_LOCALLY",
      "format": "string",
      "description": "Set to 'false' to let the service fetch the page instead of this machine."
    },
    {
      "name": "RETURNCHECK_TIMEOUT_MS",
      "format": "string",
      "description": "Budget in milliseconds for the local page read. Defaults to 8000."
    }
  ]
}

Tools

Reported by the attributed source; not independently observed by Koskamo.

No tool definitions available.

Connect from your client

Each snippet configures the same source-provided package; replace placeholders before use.

This server is operated by the named third party. Listing and endpoint checks are not an endorsement or a security audit. Review the operator's permissions, terms, and data handling before connecting. How listings are checked and corrected.

Cursor

Merge this local stdio configuration, replace every placeholder environment value, and restart Cursor. Koskamo has not executed this package.

Cursor configuration

{
  "mcpServers": {
    "returncheck-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "returncheck-mcp@0.1.1"
      ],
      "env": {
        "RETURNCHECK_API_KEY": "<YOUR_RETURNCHECK_API_KEY>",
        "RETURNCHECK_URL": "<YOUR_RETURNCHECK_URL>",
        "RETURNCHECK_FETCH_LOCALLY": "<YOUR_RETURNCHECK_FETCH_LOCALLY>",
        "RETURNCHECK_TIMEOUT_MS": "<YOUR_RETURNCHECK_TIMEOUT_MS>"
      }
    }
  }
}

Cline

Merge this local stdio configuration, replace every placeholder environment value, and restart Cline. Koskamo has not executed this package.

Cline configuration

{
  "mcpServers": {
    "returncheck-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "returncheck-mcp@0.1.1"
      ],
      "env": {
        "RETURNCHECK_API_KEY": "<YOUR_RETURNCHECK_API_KEY>",
        "RETURNCHECK_URL": "<YOUR_RETURNCHECK_URL>",
        "RETURNCHECK_FETCH_LOCALLY": "<YOUR_RETURNCHECK_FETCH_LOCALLY>",
        "RETURNCHECK_TIMEOUT_MS": "<YOUR_RETURNCHECK_TIMEOUT_MS>"
      }
    }
  }
}

VS Code

Merge this local stdio configuration, replace every placeholder environment value, and restart VS Code. Koskamo has not executed this package.

VS Code configuration

{
  "servers": {
    "returncheck-mcp": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "returncheck-mcp@0.1.1"
      ],
      "env": {
        "RETURNCHECK_API_KEY": "<YOUR_RETURNCHECK_API_KEY>",
        "RETURNCHECK_URL": "<YOUR_RETURNCHECK_URL>",
        "RETURNCHECK_FETCH_LOCALLY": "<YOUR_RETURNCHECK_FETCH_LOCALLY>",
        "RETURNCHECK_TIMEOUT_MS": "<YOUR_RETURNCHECK_TIMEOUT_MS>"
      }
    }
  }
}

Claude Desktop

Merge this local stdio configuration, replace every placeholder environment value, and restart Claude Desktop. Koskamo has not executed this package.

Claude Desktop configuration

{
  "mcpServers": {
    "returncheck-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "returncheck-mcp@0.1.1"
      ],
      "env": {
        "RETURNCHECK_API_KEY": "<YOUR_RETURNCHECK_API_KEY>",
        "RETURNCHECK_URL": "<YOUR_RETURNCHECK_URL>",
        "RETURNCHECK_FETCH_LOCALLY": "<YOUR_RETURNCHECK_FETCH_LOCALLY>",
        "RETURNCHECK_TIMEOUT_MS": "<YOUR_RETURNCHECK_TIMEOUT_MS>"
      }
    }
  }
}

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