ai.screwtape/screwtape

up checked 2026-11-11T10:38:46.997Z

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Publisher-provided title

Screwtape.ai

Publisher-provided description

Spend guardrails for AI agents: check payments, track budgets, catch duplicates, sign receipts.

Summary by lookupd

Gates agent spending: checks payees and invoices, tracks budgets, flags duplicates, and returns signed receipts for each verdict.

Install

Claude Code, remote (streamable-http)

claude mcp add --transport http screwtape https://screwtape.ai/mcp

Codex, remote (streamable-http)

codex mcp add screwtape --url https://screwtape.ai/mcp

Cursor, remote (streamable-http) → .cursor/mcp.json

{
  "mcpServers": {
    "screwtape": {
      "url": "https://screwtape.ai/mcp"
    }
  }
}

Other clients: docs. Or tell your agent: Set up lookupd for me: read https://lookupd.com/agent.md and follow it.

Tools (9 tools)

Publisher-provided text

• budget_ledger Budget Ledger: atomically reserves reported USD spend across a run and its sub-agents. Returns allow/warn/block, remaining budget, retry storms and spend veloci
• action_receipt Action Receipts: Ed25519-signed, hash-chained attestation of an agent-reported action and status; not evidence the action happened or a legal compliance certifi
• payment_check Payment check: is this seller safe to pay, checked at the moment the agent pays. Compares the 402 price and payee with the seller's published listings when they
• judge A pass/fail/retry verdict on ONE agent output, from a service outside your agent, used as the go/no-go before an agent spends money or acts on that output. Call
• check_duplicate_invoice Spend gate for invoices: decides whether an agent may pay this invoice, with a signed receipt as proof. Same as judge with one duplicate check: it compares this
• consensus False-consensus check for 2 to 16 answers to the same task, so a group of agents does not approve a spend just because they copied each other. It scores how the
• get_api_key Create a free Screwtape.ai API key (10 calls per UTC day) with no human approval. Call it only when no Screwtape key is configured and you can compute SHA-256 w
• publish_receipt Publish a signed receipt you own so a public page and a Screwtape Verified badge can link to that one verdict. Call it when you want to show that a specific out
• try_check See what a spend check returns before you have a key. Runs ONE sample check on a fixed demo invoice: a duplicate match against an invoice paid earlier, required

Details

• Version: 1.4.0
• Transports: streamable-http
• Uptime (7 days): 100%
• Median latency: 529 ms
• First indexed: 2026-11-01T08:50:50.290Z
• Last seen in registry: 2026-11-10T04:17:10.340Z
• Website: https://screwtape.ai

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• MCP URL: https://api.lookupd.com/mcp