twzrd-mcp-server / twzrd-mcp — pre-spend trust MCP for Solana x402 agents

Vet a counterparty before you pay over Solana x402. Free tools return allow / warn / block for the seller you're about to pay; optional paid tools buy a score or a signed V6 receipt — spend-capped and opt-in. Prefer the zero-install remote MCP; use this package only when you want local auto-pay for paid intel.

// Recommended — 23 tools, no wallet, nothing to install
{ "mcpServers": { "twzrd": { "url": "https://intel.twzrd.xyz/mcp" } } }

# Local auto-pay client — 5 tools; wallet only if you enable paid calls
npx -y twzrd-mcp-server        # Node
pip install twzrd-mcp          # Python

• npm (Node): twzrd-mcp-server
• PyPI (Python): twzrd-mcp
• Trust API: https://intel.twzrd.xyz · repo: twzrd-sol/twzrd-trust

Which surface do I want?

Remote is also on Smithery: https://smithery.ai/servers/wzrd/twzrd-agent-intel.

The 5 local client tools

quick_trust / full_trust buy intel on any wallet (you look risky ones up on purpose) — they don't refuse a target. Use preflight to vet a wallet you're about to pay elsewhere.

Happy path (seller-first)

1. Free preflight on the seller's receive wallet.
2. block → don't pay. Done, $0 spent.
3. warn → consider a $0.05 full_trust signed receipt before deciding.
4. allow + small spend → pay. Keep the receipt; scores decay, so re-check stale decisions.

Install & config

Paid tools are opt-in on both runtimes: they sign only when you set TWZRD_MCP_PAYMENTS_ENABLED=1 and provide a wallet key. For free tools, omit both — the server runs read-only and never signs. Spend is bounded by per-call and session caps.

Python — pip install twzrd-mcp

{ "mcpServers": { "twzrd": {
  "command": "twzrd-mcp",
  "env": {
    "TWZRD_RPC_URL": "<your Solana RPC url>",
    "TWZRD_WALLET_KEYPAIR": "/path/to/solana-keypair.json",
    "TWZRD_MCP_PAYMENTS_ENABLED": "1",
    "TWZRD_MAX_USDC_PER_CALL": "0.05",
    "TWZRD_MAX_USDC_TOTAL": "1.00"
  }
}}}

Node — npx -y twzrd-mcp-server

{ "mcpServers": { "twzrd": {
  "command": "npx", "args": ["-y", "twzrd-mcp-server"],
  "env": {
    "TWZRD_RPC_URL": "<your Solana RPC url>",
    "TWZRD_WALLET_SECRET_KEY": "<base58 Solana secret>",
    "TWZRD_MCP_PAYMENTS_ENABLED": "1",
    "TWZRD_MAX_USDC_PER_CALL": "0.05",
    "TWZRD_MAX_USDC_TOTAL": "1.00"
  }
}}}

Safety

• Opt-in payments — paid tools sign only with TWZRD_MCP_PAYMENTS_ENABLED=1; a wallet key alone never arms spending.
• Spend caps — per-call and session caps enforced in the payment selector before any signature.
• Solana-only — a non-exact / non-solana: challenge is refused, never mis-signed.
• Single-shot retry — at most one signed retry per tool call; a second 402 is surfaced, not silently re-paid.
• Free tools never enter the payment path.

Verify receipts offline (trust no one)

full_trust returns a portable Ed25519-signed V6 receipt. Verify it without trusting any TWZRD server — the issuer key is twzrd-receipt-ed25519-v1 (9V6Pn19kiUA5Rn6JpQfNduanvGt2aXGwsarosNfa2Ldf), pinned at https://intel.twzrd.xyz/.well-known/twzrd-receipt-pubkey:

npx twzrd-receipt-verifier <receipt.json> --pubkey 9V6Pn19kiUA5Rn6JpQfNduanvGt2aXGwsarosNfa2Ldf

Development

npm run build && npm run demo lists tools and runs a free preflight from source (no spend by default). For the operator-authorized $0.001 settle proof, set TWZRD_DEMO_PAID=quick, provide a wallet key, and pin both caps to 0.001 (see examples/agent-drop-in.mjs).

Links: intel.twzrd.xyz · llms.txt · OpenAPI

License: MIT