Base Tx Preflight

com.madebydevx.preflight/preflightVersion 1.0.0

Simulate a Base tx before signing: revert reason, gas limit, full fee in ETH/USD. Paid x402.

Status

Responds88 msNov 14, 2026, 14:05 UTCAnswered our handshake without sign-in.

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Data from the official MCP Registry, checked by run.zero. How we check

Streamable HTTP

https://preflight.madebydevx.com/mcpResponds88 msNov 14, 2026, 14:05 UTC

No sign-in

claude mcp add --transport http preflight https://preflight.madebydevx.com/mcp

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Settings > Connectors > Add custom connector
Name: preflight
Remote MCP server URL: https://preflight.madebydevx.com/mcp

{
  "mcpServers": {
    "preflight": {
      "url": "https://preflight.madebydevx.com/mcp"
    }
  }
}

code --add-mcp '{"name":"preflight","type":"http","url":"https://preflight.madebydevx.com/mcp"}'

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2 tools

Tools of Base Tx Preflight
	Description		Read-only	Idempotent	Open world
`preflight_quote`Free: price, payTo and the exact x402 request to buy a Base transaction preflight (simulation with decoded revert, gas limit, full fee in ETH/USD).	Free: price, payTo and the exact x402 request to buy a Base transaction preflight (simulation with decoded revert, gas limit, full fee in ETH/USD).	Not declared	Not declared	Not declared	Not declared
`preflight_validate`Free: checks from/to/data/value formatting and whether 'to' is a contract on Base, before you pay.	Free: checks from/to/data/value formatting and whether 'to' is a contract on Base, before you pay.	Not declared	Not declared	Not declared	Not declared

Registry status: Active
Published: Nov 6, 2026
Updated: Nov 6, 2026
Website: https://preflight.madebydevx.com/⁠ (opens in a new tab)
Repository: Not given
Categories (suggested): Finance and paymentsSuggested categories are assigned automatically from the registry text and may be wrong. Verified operators can correct them.
GDPR: Not declared