com.madebydevx.preflight/preflight
Base Tx Preflight
Is the Base Tx Preflight MCP server down? No. It answered initialize and tools/list in the probe of 2026-11-06.
Simulate a Base tx before signing: revert reason, gas limit, full fee in ETH/USD. Paid x402.
alive probed 2026-11-14 · unchanged since 2026-11-06 · HTTP 200
- Endpoint
- https://preflight.madebydevx.com/mcp (streamable-http)
- Host
- preflight.madebydevx.com
- Protocol
- 2025-11-25
- Reports itself as
- devx-preflight 1.0.0
- Capabilities
- tools
- Instructions
- 177 characters
- Of a 1M window
- <0.1 % of a 1M context window
- Count
- 290 tokens in Claude Opus 5.5, exact, measured 2026-11-06. With the Claude Code prefix mcp__…__ on each tool name: 306. The o200k_base estimate is 160. Counted again when the tool definitions change. Method.
- Website
- https://preflight.madebydevx.com
- Registry
- active, updated 2026-11-06 · registry entry
Most expensive tools
The Claude column scales the o200k estimate of each tool by this server's ratio of exact to estimate, 1.81×.
| Tool | ≈ Claude tokens | o200k estimate | Share of this server |
|---|---|---|---|
| preflight_quote | 156 | 86 | 54 % |
| preflight_validate | 134 | 74 | 46 % |
Compare this server with others.
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Servers that mention preflight.
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- PreClick — An MCP-native URL preflight scanning service for autonomous agents (formerly URLCheck). ai.urlcheck/urlcheck-mcp · alive
- cc.ticktape/mcp · alive
- Agent Preflight com.agent-preflight/agent-preflight · alive
- Agent Distribution com.agentdistributionservices/agent-distribution · alive
- Silent Door Repository Handoff Planner com.aibitious.silent/repository-safety-preflight · alive
- Butterfly Delta Preflight com.butterflydelta/preflight · alive
Badge for the README
The result of the latest probe, the tool count and the token cost. The feed has an entry for every probe that changed them.
A mail when this server changes
Stops answering, comes back, tool set or cost changes. One confirmation mail first, a stop link in every mail.
For the publisher
- The server answers initialize and tools/list. Nothing to fix.
Fixed something? Probe it now, with the same steps as the daily run. This page updates with the next daily run.