Base Tx Preflight
Simulate a Base tx before signing: revert reason, gas limit, full fee in ETH/USD. Paid x402.
What it does
Base Tx Preflight is an MCP server, a connector that lets an AI assistant use it as a tool. It is hosted: an assistant connects to it over the internet, nothing to install.
No capability identified yet from its description.
Facts come from the Official MCP Registry, as declared by the publisher. Capabilities are matched automatically (low confidence). None of this is a test of the tool.
At a glance
How to connect
As declared in the Official MCP Registry · hosted endpoint tested by Electra Index 2h ago (live check)Hosted endpoint
https://preflight.madebydevx.com/mcpstreamable-http
In Claude Code: claude mcp add --transport http base-tx-preflight https://preflight.madebydevx.com/mcp
MCP settings (Claude Desktop, Cursor and other MCP clients)
{
"mcpServers": {
"base-tx-preflight": {
"url": "https://preflight.madebydevx.com/mcp"
}
}
}Live check
Electra Index connected to the hosted endpoint 2h agoONLINE Base Tx Preflight answered an MCP connection on 06 Nov 2026 and introduced itself as devx-preflight 1.0.0 (MCP protocol 2025-06-18).
2 tools offered to AI assistants
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).preflight_validate· Free: checks from/to/data/value formatting and whether 'to' is a contract on Base, before you pay.
What "online" means: the server answered an MCP connection at the time of the check. It is not a guarantee of security, quality or continuous uptime. How we test: we open an MCP session and ask for the tool list, as an AI assistant would. We never run a tool and never send a key. Checked every few days. Method
Is this your server? Monitoring Pro: a check every 30 minutes and an email within the hour when it stops answering. Launch offer: $39.99 once, for life.
Facts & evidence
Each fact shows where it was seen and when.| Fact | Value | Evidence | Source | Last confirmed |
|---|---|---|---|---|
| Hosted endpoint | https://preflight.madebydevx.com/mcp | DECLARED | SRC-001 Official MCP Registry | 1h ago |
| Local install (package) | no | DECLARED | SRC-001 Official MCP Registry | 1h ago |
| Remote access (hosted) | yes | DECLARED | SRC-001 Official MCP Registry | 1h ago |
| Website | https://preflight.madebydevx.com | DECLARED | SRC-001 Official MCP Registry | 1h ago |
| Registry status | active | DECLARED | SRC-001 Official MCP Registry | 1h ago |
| Version | 1.0.0 | DECLARED | SRC-001 Official MCP Registry | 1h ago |
| MCP server | yes | DECLARED | SRC-001 Official MCP Registry | 1h ago |
Change history
- NEW06 Nov 2026first seen in the index
Is this page accurate?
Flag it and our robot re-checks the official source. Reports never change a score.Is Base Tx Preflight still online?
Free alerts · no account▲ 0Do you run Base Tx Preflight? Know when it stops answering
For publishers · optionalIts hosted endpoint can be monitored. Monitoring Pro connects every 30 minutes like an AI assistant, emails you within the hour when it stops answering, keeps a 90-day availability history and adds your answer rate to your badge.
Monitoring never changes a score or a rank.
Are you the publisher of Base Tx Preflight?
Free · show your listingAn independent listing builds trust with your buyers. Announce it, and add the badge to your website or README.
<a href="https://electraindex.com/mcp/base-tx-preflight?utm_source=badge&utm_medium=share&utm_campaign=listing"><img src="https://electraindex.com/api/badge/base-tx-preflight" alt="Listed on Electra Index"></a>Questions about Base Tx Preflight
How do I connect Base Tx Preflight?
Use the hosted endpoint https://preflight.madebydevx.com/mcp in your assistant's MCP settings. The exact settings are in "How to connect" above, as declared in the Official MCP Registry.
What tools does Base Tx Preflight offer?
When Electra Index connected on 06 Nov 2026, it listed 2 tools: preflight_quote, preflight_validate. The full list is in "Live check" above.
Is Base Tx Preflight online?
Yes. Its hosted endpoint answered an MCP connection from Electra Index 2h ago.