three.ws Agent Payments MCP Server

by nirholasio.github.nirholas/agentcore-payments-mcpv0.1.4

Governed x402 payment sessions: pay any endpoint with budget, allowlist & per-tx caps, no key.

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Active2d ago

Install three.ws Agent Payments MCP server

claude mcp add agentcore-payments -e THREE_WS_SESSION='<three-ws-session>' -e PAYMENT_SESSION_TOKEN='<payment-session-token>' -- npx -y @three-ws/agentcore-payments-mcp

{
  "mcpServers": {
    "agentcore-payments": {
      "command": "npx",
      "args": [
        "-y",
        "@three-ws/agentcore-payments-mcp"
      ],
      "env": {
        "THREE_WS_SESSION": "<three-ws-session>",
        "PAYMENT_SESSION_TOKEN": "<payment-session-token>"
      }
    }
  }
}

Add to ~/.cursor/mcp.json (global) or .cursor/mcp.json (project).

{
  "mcpServers": {
    "agentcore-payments": {
      "command": "npx",
      "args": [
        "-y",
        "@three-ws/agentcore-payments-mcp"
      ],
      "env": {
        "THREE_WS_SESSION": "<three-ws-session>",
        "PAYMENT_SESSION_TOKEN": "<payment-session-token>"
      }
    }
  }
}

Settings → Developer → Edit Config (claude_desktop_config.json), then restart.

{
  "servers": {
    "agentcore-payments": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "@three-ws/agentcore-payments-mcp"
      ],
      "env": {
        "THREE_WS_SESSION": "<three-ws-session>",
        "PAYMENT_SESSION_TOKEN": "<payment-session-token>"
      }
    }
  }
}

Add to .vscode/mcp.json in your workspace.

{
  "mcpServers": {
    "agentcore-payments": {
      "command": "npx",
      "args": [
        "-y",
        "@three-ws/agentcore-payments-mcp"
      ],
      "env": {
        "THREE_WS_SESSION": "<three-ws-session>",
        "PAYMENT_SESSION_TOKEN": "<payment-session-token>"
      }
    }
  }
}

Add to ~/.codeium/windsurf/mcp_config.json.

Configuration

Variable	Required	Secret	Description
THREE_WS_SESSION	—	yes	Your three.ws session token (value of the `__Host-sid` cookie from a signed-in browser). Required for account management operations: create_payment_session, list_payment_sessions, check_payment_session, cancel_payment_session.
PAYMENT_SESSION_TOKEN	—	yes	A payment session bearer token (starts with 'pss_') from create_payment_session. Used by the agent for pay_with_session calls when no inline token is passed. Treat like a spending card — it authorizes payments up to the session's budget.
THREE_WS_BASE	—	—	Base URL of the three.ws API. Override only when self-hosting or targeting a preview deployment.
THREE_WS_TIMEOUT_MS	—	—	Per-request HTTP timeout in milliseconds. x402 payments involve on-chain settlement so this should be generous (default: 30000).

Freshness

Active — last maintenance signal 2d ago. The newest of the signals below sets the band.

Last commit (default branch)
2026-10-08 · 2d ago · GitHub
Latest release
2026-09-30 · 10d ago · GitHub · v1.5.2
Package published
no data · npm/PyPI
Registry entry updated
2026-08-19 · 51d ago · official registry · v0.1.4

FAQ

›How do I install the three.ws Agent Payments MCP server in Claude Code?

Run: claude mcp add agentcore-payments -e THREE_WS_SESSION='<three-ws-session>' -e PAYMENT_SESSION_TOKEN='<payment-session-token>' -- npx -y @three-ws/agentcore-payments-mcp. For Cursor, VS Code, Claude Desktop and Windsurf, use the install tabs above.

›Does three.ws Agent Payments require an API key?

Yes. It expects THREE_WS_SESSION, PAYMENT_SESSION_TOKEN, of which 2 are secrets.

›Can I use three.ws Agent Payments as a remote (hosted) MCP server?

No hosted endpoint is published; it runs locally over stdio.

›Is three.ws Agent Payments in the official MCP registry?

Yes, as io.github.nirholas/agentcore-payments-mcp.