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8 clients · secrets stay placeholders

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{
  "mcpServers": {
    "x402check": {
      "command": "npx",
      "args": [
        "-y",
        "@x402check/[email protected]"
      ],
      "env": {
        "X402CHECK_CREDIT_TOKEN": "${X402CHECK_CREDIT_TOKEN}",
        "X402CHECK_PAYER_KEY": "${X402CHECK_PAYER_KEY}",
        "X402CHECK_BUDGET_USD": "1.00",
        "X402CHECK_MAX_PAYMENT_USD": "0.05"
      }
    }
  }
}

claude mcp add x402check -e "X402CHECK_CREDIT_TOKEN=${X402CHECK_CREDIT_TOKEN}" -e "X402CHECK_PAYER_KEY=${X402CHECK_PAYER_KEY}" -e "X402CHECK_BUDGET_USD=1.00" -e "X402CHECK_MAX_PAYMENT_USD=0.05" -- npx -y @x402check/[email protected]

[mcp_servers.x402check]
command = "npx"
args = ["-y", "@x402check/[email protected]"]
env = { "X402CHECK_CREDIT_TOKEN" = "${X402CHECK_CREDIT_TOKEN}", "X402CHECK_PAYER_KEY" = "${X402CHECK_PAYER_KEY}", "X402CHECK_BUDGET_USD" = "1.00", "X402CHECK_MAX_PAYMENT_USD" = "0.05" }

{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "x402check": {
      "type": "local",
      "command": [
        "npx",
        "-y",
        "@x402check/[email protected]"
      ],
      "enabled": true,
      "environment": {
        "X402CHECK_CREDIT_TOKEN": "{env:X402CHECK_CREDIT_TOKEN}",
        "X402CHECK_PAYER_KEY": "{env:X402CHECK_PAYER_KEY}",
        "X402CHECK_BUDGET_USD": "1.00",
        "X402CHECK_MAX_PAYMENT_USD": "0.05"
      }
    }
  }
}

{
  "mcpServers": {
    "x402check": {
      "command": "npx",
      "args": [
        "-y",
        "@x402check/[email protected]"
      ],
      "env": {
        "X402CHECK_CREDIT_TOKEN": "${X402CHECK_CREDIT_TOKEN}",
        "X402CHECK_PAYER_KEY": "${X402CHECK_PAYER_KEY}",
        "X402CHECK_BUDGET_USD": "1.00",
        "X402CHECK_MAX_PAYMENT_USD": "0.05"
      }
    }
  },
  "deeplink": "cursor://anysphere.cursor-deeplink/mcp/install?name=x402check&config=eyJjb21tYW5kIjoibnB4IiwiYXJncyI6WyIteSIsIkB4NDAyY2hlY2svbWNwQDAuMy4yIl0sImVudiI6eyJYNDAyQ0hFQ0tfQ1JFRElUX1RPS0VOIjoiJHtYNDAyQ0hFQ0tfQ1JFRElUX1RPS0VOfSIsIlg0MDJDSEVDS19QQVlFUl9LRVkiOiIke1g0MDJDSEVDS19QQVlFUl9LRVl9IiwiWDQwMkNIRUNLX0JVREdFVF9VU0QiOiIxLjAwIiwiWDQwMkNIRUNLX01BWF9QQVlNRU5UX1VTRCI6IjAuMDUifX0%3D"
}

{
  "servers": {
    "x402check": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "@x402check/[email protected]"
      ],
      "env": {
        "X402CHECK_CREDIT_TOKEN": "${X402CHECK_CREDIT_TOKEN}",
        "X402CHECK_PAYER_KEY": "${X402CHECK_PAYER_KEY}",
        "X402CHECK_BUDGET_USD": "1.00",
        "X402CHECK_MAX_PAYMENT_USD": "0.05"
      }
    }
  }
}

{
  "mcpServers": {
    "x402check": {
      "command": "npx",
      "args": [
        "-y",
        "@x402check/[email protected]"
      ],
      "env": {
        "X402CHECK_CREDIT_TOKEN": "${X402CHECK_CREDIT_TOKEN}",
        "X402CHECK_PAYER_KEY": "${X402CHECK_PAYER_KEY}",
        "X402CHECK_BUDGET_USD": "1.00",
        "X402CHECK_MAX_PAYMENT_USD": "0.05"
      }
    }
  }
}

extensions:
  "x402check":
    enabled: true
    name: "x402check"
    type: stdio
    cmd: "npx"
    args:
      - "-y"
      - "@x402check/[email protected]"
    envs:
      "X402CHECK_CREDIT_TOKEN": "${X402CHECK_CREDIT_TOKEN}"
      "X402CHECK_PAYER_KEY": "${X402CHECK_PAYER_KEY}"
      "X402CHECK_BUDGET_USD": "1.00"
      "X402CHECK_MAX_PAYMENT_USD": "0.05"
    timeout: 300

Placeholders to fill from your own secret store: ${X402CHECK_CREDIT_TOKEN}, ${X402CHECK_PAYER_KEY}. The registry never accepts secret values.

This is a local package: the command runs on your machine.

Quality – / 100not scored

Not scored: fewer than three checks apply, usually because no remote answered a credential-free probe or the server is a local package.

protocoln/a · weight 25

n/a
protocol.modern, protocol.stateless, protocol.transport, protocol.list_ttlno remote answered a protocol handshake (not probed yet, unreachable, or local-only)

authorizationn/a · weight 15

n/a
auth.prm, auth.as_metadata, auth.cimdno remote uses OAuth
n/a
auth.secret_in_urlno templated URL

tool hygienen/a · weight 30

n/a
tools.descriptions, tools.description_length, tools.schemas, tools.annotations, tools.directory_hints, tools.token_cost, tools.api_dumptool list unknown (behind auth, not probed, or empty)

stabilityn/a · weight 15

n/a
stability.changes, stability.rug_pulltool list unknown

dependenciesn/a · weight 15

n/a
deps.known_vulns, deps.mcp_sdk_version, deps.resolvabledeps.dev does not know @x402check/[email protected]

Tool list unknown · checked 2026-10-20 11:08 UTC

Tool changes

No tool definition changes recorded. A server's first observation is its baseline; later probes record what changes.

Checks run on what our credential-free, read-only probes observe; tools are never called and no code audit is performed. How it is computed.

Trust 96 / 100

provenance90

livenessn/a

freshness100

hygiene100

+repository +namespace-matches-repo +website ~liveness-unmeasured +updated-2d-ago

Derived from observable signals (official registry feed and our own credential-free probes); no code audit performed. How it is computed.

Dependencies

@x402check/[email protected] npmthis version is not known to the dependency resolver

Dependency graphs from deps.dev; advisories from OSV.dev, including the GitHub Advisory Database and the PyPI Advisory Database; all CC BY 4.0. The graph is what a clean install of this version resolves today; nothing was installed or run. How it is checked.

Endpoints

package	registry	version	runtime	secrets
`@x402check/mcp`	npm	0.3.2	–	`X402CHECK_CREDIT_TOKEN`, `X402CHECK_PAYER_KEY`

Tools (0)

No tools observed. Local packages are never executed by the registry.

Schemas: list_tools.

Similar MCP servers

Official server.json

{
  "name": "io.github.caiovicentino/x402check",
  "title": "x402check",
  "$schema": "https://static.modelcontextprotocol.io/schemas/2025-12-11/server.schema.json",
  "version": "0.3.2",
  "packages": [
    {
      "version": "0.3.2",
      "transport": {
        "type": "stdio"
      },
      "identifier": "@x402check/mcp",
      "registryType": "npm",
      "registryBaseUrl": "https://registry.npmjs.org",
      "environmentVariables": [
        {
          "name": "X402CHECK_CREDIT_TOKEN",
          "format": "string",
          "isSecret": true,
          "description": "Prepaid credit token (x402c_…, from POST https://x402check.xyz/v1/credits): $0.001 a check"
        },
        {
          "name": "X402CHECK_PAYER_KEY",
          "format": "string",
          "isSecret": true,
          "description": "Private key of a dedicated low-balance wallet: pays the x402 resources x402check_pay clears, and per-call checks without credits"
        },
        {
          "name": "X402CHECK_BUDGET_USD",
          "format": "string",
          "default": "1.00",
          "description": "Spend cap for this server process: the payer's spend (checks and resources), and separately what checks spend from prepaid credits"
        },
        {
          "name": "X402CHECK_PINNED_KEYS",
          "format": "string",
          "description": "Comma-separated RFC 7638 thumbprints of the attestation keys accepted (default: x402check's own keys, for its own issuer)"
        },
        {
          "name": "X402CHECK_MAX_PAYMENT_USD",
          "format": "string",
          "default": "0.05",
          "description": "The most a single payment may cost (a check or a resource)"
        }
      ]
    }
  ],
  "repository": {
    "url": "https://github.com/caiovicentino/jev-risk-check-provider",
    "source": "github",
    "subfolder": "packages/mcp"
  },
  "websiteUrl": "https://x402check.xyz",
  "description": "Risk-check counterparties before an AI agent pays; pay x402 resources only after a verified allow"
}