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Preflight

dainidude/preflight-x402

Pay-per-call smart-contract security: scans, tx simulation, and token risk via x402 (USDC on Base).

tools
3
transport
HTTP
last updated
Nov 13, 2026
View on GitHub

Tools

3 tools

Public tool metadata for what this MCP can expose to an agent.

preflight_checkMCP tool for the single-file security scan, listed in the MCP server (src/preflight/mcp/) section.

MCP tool for the single-file security scan, listed in the MCP server (src/preflight/mcp/) section.

No parameter schema in public metadata yet.

preflight_simMCP tool for transaction pre-flight simulation, listed in the MCP server (src/preflight/mcp/) section.

MCP tool for transaction pre-flight simulation, listed in the MCP server (src/preflight/mcp/) section.

No parameter schema in public metadata yet.

preflight_pricing

No parameter schema in public metadata yet.

Sponsors

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Readme

Preflight — x402-paid smart-contract pre-flight security API

Pay-per-call security scans and transaction simulations for AI agents. POST Solidity source or a transaction, receive a severity-scored, EIP-712-attested verdict: looks_ok | review | block. Payments over the x402 protocol (HTTP 402 + real USDC on Base mainnet).

Built from the product plan in dud3-vault/LLM/2026-11-08 - x402 Product Plans.md by hermes + omp + crush + opencode in a 4-pane Herdr session.

Try it

# no wallet needed (server DEV_MODE=1):
uv run uvicorn preflight.api.app:app --port 8000 &
uv run python client/pay_client.py --dev

# real x402 payment (funded burner, $0.01):
uv run python client/pay_client.py

# the handshake, by hand:
curl -i -X POST http://127.0.0.1:8000/v1/scan -H 'Content-Type: application/json' \
  -d '{"source":"contract A {}"}'
# → 402, PAYMENT-REQUIRED header (base64 JSON requirements)
# → retry with PAYMENT-SIGNATURE header → verdict + PAYMENT-RESPONSE

Endpoints & prices

View the full README on GitHub

Details

Repository
github.com/dainidude/preflight-x402
Category
Security & Pentesting
Transport
HTTP
Registry
MCP registry, active

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