Koskamo

callx402 MCP server

A zero-dependency, read-only MCP server exposing six diagnostic tools for x402 payments. It allows agents to diagnose broken payments, rescue failed transactions, resolve settlement states from on-chain evidence, and check subsystem reachability without executing or charging money.

Package and access

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

callx402 MCP server logo, by PayloadCommunity listingLocal stdioSource reviewed; not executedPublished by Payload
Vendor documentation

What you can do with it

  • Diagnose a broken x402 payment
  • Rescue a failed transaction
  • Resolve settlement state from on-chain evidence
  • Check subsystem reachability status

Source and maintenance

Community listingRegistry 1.0.5MIT
mcp-registry: io.github.payload-tools/callx402@1.0.5Source repositoryProject website
Last repository push
Latest release
v1.0.5
Maintenance checked

Packages and installation

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

callx402 1.0.5

npm
callx402 package definition
{
  "version": "1.0.5",
  "transport": "stdio",
  "identifier": "callx402",
  "registryType": "npm"
}

Tools

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

No tool definitions available.

Maintenance history

Public check and source-refresh events. Editorial and ownership records remain private.

  • · repository · passed · metadata changed · updated
  • · backfill · recorded · Pre-expansion baseline; unobserved rich metadata remains unknown

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": {
    "callx402-mcp-server": {
      "command": "npx",
      "args": [
        "-y",
        "callx402@1.0.5"
      ]
    }
  }
}

Cline

Merge this local stdio configuration, replace every placeholder environment value, and restart Cline. Koskamo has not executed this package.
Cline configuration
{
  "mcpServers": {
    "callx402-mcp-server": {
      "command": "npx",
      "args": [
        "-y",
        "callx402@1.0.5"
      ]
    }
  }
}

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": {
    "callx402-mcp-server": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "callx402@1.0.5"
      ]
    }
  }
}

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": {
    "callx402-mcp-server": {
      "command": "npx",
      "args": [
        "-y",
        "callx402@1.0.5"
      ]
    }
  }
}

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