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8 clients · secrets stay placeholders

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{
  "mcpServers": {
    "x402-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "@three-ws/[email protected]"
      ],
      "env": {
        "SOLANA_SECRET_KEY": "${SOLANA_SECRET_KEY}",
        "SOLANA_RPC_URL": "https://api.mainnet-beta.solana.com",
        "MAX_PAY_USD": "1",
        "REQUIRE_CONFIRM": "true",
        "THREE_WS_BASE": "https://three.ws"
      }
    }
  }
}

claude mcp add x402-mcp -e "SOLANA_SECRET_KEY=${SOLANA_SECRET_KEY}" -e "SOLANA_RPC_URL=https://api.mainnet-beta.solana.com" -e "MAX_PAY_USD=1" -e "REQUIRE_CONFIRM=true" -e "THREE_WS_BASE=https://three.ws" -- npx -y @three-ws/[email protected]

[mcp_servers.x402-mcp]
command = "npx"
args = ["-y", "@three-ws/[email protected]"]
env = { "SOLANA_SECRET_KEY" = "${SOLANA_SECRET_KEY}", "SOLANA_RPC_URL" = "https://api.mainnet-beta.solana.com", "MAX_PAY_USD" = "1", "REQUIRE_CONFIRM" = "true", "THREE_WS_BASE" = "https://three.ws" }

{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "x402-mcp": {
      "type": "local",
      "command": [
        "npx",
        "-y",
        "@three-ws/[email protected]"
      ],
      "enabled": true,
      "environment": {
        "SOLANA_SECRET_KEY": "{env:SOLANA_SECRET_KEY}",
        "SOLANA_RPC_URL": "https://api.mainnet-beta.solana.com",
        "MAX_PAY_USD": "1",
        "REQUIRE_CONFIRM": "true",
        "THREE_WS_BASE": "https://three.ws"
      }
    }
  }
}

{
  "mcpServers": {
    "x402-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "@three-ws/[email protected]"
      ],
      "env": {
        "SOLANA_SECRET_KEY": "${SOLANA_SECRET_KEY}",
        "SOLANA_RPC_URL": "https://api.mainnet-beta.solana.com",
        "MAX_PAY_USD": "1",
        "REQUIRE_CONFIRM": "true",
        "THREE_WS_BASE": "https://three.ws"
      }
    }
  },
  "deeplink": "cursor://anysphere.cursor-deeplink/mcp/install?name=x402-mcp&config=eyJjb21tYW5kIjoibnB4IiwiYXJncyI6WyIteSIsIkB0aHJlZS13cy94NDAyLW1jcEAwLjIuMyJdLCJlbnYiOnsiU09MQU5BX1NFQ1JFVF9LRVkiOiIke1NPTEFOQV9TRUNSRVRfS0VZfSIsIlNPTEFOQV9SUENfVVJMIjoiaHR0cHM6Ly9hcGkubWFpbm5ldC1iZXRhLnNvbGFuYS5jb20iLCJNQVhfUEFZX1VTRCI6IjEiLCJSRVFVSVJFX0NPTkZJUk0iOiJ0cnVlIiwiVEhSRUVfV1NfQkFTRSI6Imh0dHBzOi8vdGhyZWUud3MifX0%3D"
}

{
  "servers": {
    "x402-mcp": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "@three-ws/[email protected]"
      ],
      "env": {
        "SOLANA_SECRET_KEY": "${SOLANA_SECRET_KEY}",
        "SOLANA_RPC_URL": "https://api.mainnet-beta.solana.com",
        "MAX_PAY_USD": "1",
        "REQUIRE_CONFIRM": "true",
        "THREE_WS_BASE": "https://three.ws"
      }
    }
  }
}

{
  "mcpServers": {
    "x402-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "@three-ws/[email protected]"
      ],
      "env": {
        "SOLANA_SECRET_KEY": "${SOLANA_SECRET_KEY}",
        "SOLANA_RPC_URL": "https://api.mainnet-beta.solana.com",
        "MAX_PAY_USD": "1",
        "REQUIRE_CONFIRM": "true",
        "THREE_WS_BASE": "https://three.ws"
      }
    }
  }
}

extensions:
  "x402-mcp":
    enabled: true
    name: "x402-mcp"
    type: stdio
    cmd: "npx"
    args:
      - "-y"
      - "@three-ws/[email protected]"
    envs:
      "SOLANA_SECRET_KEY": "${SOLANA_SECRET_KEY}"
      "SOLANA_RPC_URL": "https://api.mainnet-beta.solana.com"
      "MAX_PAY_USD": "1"
      "REQUIRE_CONFIRM": "true"
      "THREE_WS_BASE": "https://three.ws"
    timeout: 300

Placeholders to fill from your own secret store: ${SOLANA_SECRET_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

dependencies83 · weight 15

warn
deps.known_vulns5 advisories of lower severity or without a published fix: GHSA-3gc7-fjrx-p6mg in [email protected] (indirect, no fix yet), GHSA-528h-pc64-c93x in [email protected] (indirect, fixed in 3.5.0), GHSA-hqr4-qq8f-hg3x in [email protected] (indirect, fixed in 3.6.0), ...
pass
deps.mcp_sdk_version@modelcontextprotocol/sdk 1.32.1, no known advisory
pass
deps.resolvable@three-ws/[email protected] resolved: 229 packages

Tool list unknown · checked 2026-10-19 10:20 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 84 / 100

duplicate-repo

provenance90

livenessn/a

freshness100

hygiene60

+repository +namespace-matches-repo +website ~liveness-unmeasured +updated-9d-ago -duplicate-repo(51 names)

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

Dependencies

@three-ws/[email protected] npm228 dependencies, resolved · MCP SDK @modelcontextprotocol/sdk 1.32.1 · advisories checked 2026-10-19

advisory	severity	package	fixed in
GHSA-3gc7-fjrx-p6mgbigint-buffer Vulnerable to Buffer Overflow via toBigIntLE() Function	high	`[email protected]`indirect	no fix yet
GHSA-528h-pc64-c93xstream-json: pick/ignore/filter/replace filters are O(depth²) on nested input — small crafted JSON blocks the event loop for seconds→minutes (DoS)	moderate	`[email protected]`indirect	fixed in `3.5.0`
GHSA-hqr4-qq8f-hg3xstream-json: JSONC parser and verifier re-scan the whole accumulated comment on every input chunk	moderate	`[email protected]`indirect	fixed in `3.6.0`
GHSA-mjw6-4jj6-33hcstream-json has a prototype pollution issue: Assembler writes this.current[this.key] on plain objects	moderate	`[email protected]`indirect	fixed in `3.6.0`
GHSA-w5hq-g745-h8pquuid: Missing buffer bounds check in v3/v5/v6 when buf is provided	moderate	`[email protected]`indirect	fixed in `11.1.1`

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
`@three-ws/x402-mcp`	npm	0.2.3	npx	`SOLANA_SECRET_KEY`

Tools (0)

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

Schemas: list_tools.

Also listed as

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Official server.json

{
  "name": "io.github.nirholas/x402-mcp",
  "icons": [
    {
      "src": "https://three.ws/three-ws-mcp-icon.svg",
      "sizes": [
        "any"
      ],
      "mimeType": "image/svg+xml"
    }
  ],
  "title": "x402 Wallet",
  "$schema": "https://static.modelcontextprotocol.io/schemas/2025-12-11/server.schema.json",
  "version": "0.2.3",
  "packages": [
    {
      "version": "0.2.3",
      "transport": {
        "type": "stdio"
      },
      "identifier": "@three-ws/x402-mcp",
      "runtimeHint": "npx",
      "registryType": "npm",
      "environmentVariables": [
        {
          "name": "SOLANA_SECRET_KEY",
          "format": "string",
          "isSecret": true,
          "description": "Base58 (or JSON byte-array) Solana secret key that signs payments and holds the USDC. Not needed for the read tools (find_services, inspect_endpoint, or x402_wallet with an explicit address). Treat like cash."
        },
        {
          "name": "SOLANA_RPC_URL",
          "format": "string",
          "default": "https://api.mainnet-beta.solana.com",
          "description": "Solana mainnet RPC endpoint. Defaults to the public cluster — bring your own (Helius / Quicknode / Triton) for production traffic."
        },
        {
          "name": "MAX_PAY_USD",
          "format": "number",
          "default": "1",
          "description": "Max USD a single pay_and_call may spend. Bounds a runaway or injected payment."
        },
        {
          "name": "REQUIRE_CONFIRM",
          "format": "boolean",
          "default": "true",
          "description": "When on (default), pay_and_call refuses until re-issued with confirm:true. Set 0/false to disable the gate."
        },
        {
          "name": "THREE_WS_BASE",
          "format": "string",
          "default": "https://three.ws",
          "description": "Base URL of the three.ws API that serves /api/bazaar/search for find_services. Override only when self-hosting."
        }
      ]
    }
  ],
  "repository": {
    "url": "https://github.com/nirholas/three.ws",
    "source": "github",
    "subfolder": "packages/x402-mcp"
  },
  "websiteUrl": "https://three.ws",
  "description": "Self-custodial x402 wallet for AI agents: pay any service in USDC or $THREE from your own key."
}