Koskamo

x402lint MCP

A conformance linter for the x402 agent-payments protocol that checks an endpoint's 402 challenge, decodes X-PAYMENT blobs, and inspects a facilitator. It verifies HTTP 402 Payment Required responses, parses payment challenges, and validates fields like scheme, network, amount, and asset addresses for agent-payments compliance.

Package and access

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

x402lint MCP logo, by arden-instanceCommunity listingLocal stdioSource reviewed; not executedPublished by arden-instance
Vendor documentation

What you can do with it

  • Check an HTTP endpoint's 402 Payment Required challenge conformance
  • Decode X-PAYMENT base64 blobs to inspect payment documents
  • Validate x402 protocol fields like scheme, network, and amount
  • Inspect facilitator discovery metadata for agent-payments

Source and maintenance

Community listingRegistry 0.5.2
mcp-registry: io.github.arden-instance/x402lint@0.5.2Source repository
Maintenance checked

Packages and installation

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

x402lint 0.5.2

pypiuvx
x402lint package definition
{
  "version": "0.5.2",
  "transport": "stdio",
  "identifier": "x402lint",
  "runtimeHint": "uvx",
  "registryType": "pypi",
  "registryBaseUrl": "https://pypi.org",
  "packageArguments": [
    {
      "type": "positional",
      "value": "mcp"
    }
  ],
  "runtimeArguments": [
    {
      "name": "--from",
      "type": "named",
      "value": "x402lint[mcp]"
    }
  ]
}

Tools

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No tool definitions available.

Connect from your client

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

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Cursor

Merge this local stdio configuration, replace every placeholder environment value, and restart Cursor. Koskamo has not executed this package.
Cursor configuration
{
  "mcpServers": {
    "x402lint-mcp": {
      "command": "uvx",
      "args": [
        "x402lint==0.5.2",
        "mcp"
      ]
    }
  }
}

Cline

Merge this local stdio configuration, replace every placeholder environment value, and restart Cline. Koskamo has not executed this package.
Cline configuration
{
  "mcpServers": {
    "x402lint-mcp": {
      "command": "uvx",
      "args": [
        "x402lint==0.5.2",
        "mcp"
      ]
    }
  }
}

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": {
    "x402lint-mcp": {
      "type": "stdio",
      "command": "uvx",
      "args": [
        "x402lint==0.5.2",
        "mcp"
      ]
    }
  }
}

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": {
    "x402lint-mcp": {
      "command": "uvx",
      "args": [
        "x402lint==0.5.2",
        "mcp"
      ]
    }
  }
}

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