Screwtape.ai

Verify before the agent pays. Screwtape is a separate check on agent work before a payment goes out: invoices, duplicate invoices and reconciliation, with a signed receipt for your auditor. It also judges any agent output (pass, fail or retry) and flags false consensus across agents. A second check, outside your agent. Screwtape runs as a separate service from your agent, with its own prompt and checks, and it is not paid more when your agent passes. Every verdict comes with a signed receipt you can verify yourself. The receipt proves what was checked, when, and the verdict that was returned. Skills: check_duplicate_invoice (duplicate invoice check before an agent pays; needs a Bearer key), judge (pass/fail/retry verdict on one agent output against your evidence), consensus (false-consensus check across 2 to 16 answers), get_api_key (free key, 100 calls per UTC day, proof of work), buy_pack, publish_receipt. A2A JSON-RPC message/send at https://screwtape.ai/a2a maps to judge (send a duplicate object in the data part to check an invoice). The same skills are on MCP (https://screwtape.ai/mcp) and REST (https://screwtape.ai/openapi.json). Unpaid calls return x402 payment requirements ($0.005 USDC per call on Base or Solana). Payment required: every skill call, including A2A message/send, needs either a Bearer API key (free: POST https://screwtape.ai/v1/signup, 100 calls per UTC day) or an x402 payment (scheme exact, amount 5000 = $0.005 USDC on Base eip155:8453 or Solana). A call with neither returns HTTP 402 with the x402 requirements.