Butterfly Delta Preflight MCP Server

by butterflydelta Your server? Claim it

answering

Butterfly Delta Preflight is answering right now. Last checked 9 min ago. It exposes 2 tools.

Signed exact-order pre-submit gate for crypto bots using live Coinbase and Gemini execution data.

Uptime history 34 days of history · worst day 98%

34 days agonow

98.9%

Uptime 24h

90 of 91 checks

Tools

read from the server

1371 ms

Response time

average over 24h

open, no key

Access

streamable-http

Butterfly Delta Preflight missed one check this week

Everything else answered, so this is steady rather than shaky. We check every 15 minutes, which is how a one-off gets told apart from the start of a pattern, and how you hear about the next one within the hour instead of from your users.

Connect this server

Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 9 min ago.

Claude Code Claude Desktop Codex Cursor VS Code

run in your terminal

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

~/Library/Application Support/Claude/claude_desktop_config.json

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

~/.codex/config.toml

[mcp_servers.preflight]
url = "https://butterflydelta.com/api/mcp"

.cursor/mcp.json

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

.vscode/mcp.json

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

Available tools 2

Read directly from the server with tools/list, grouped by what they act on. If a tool disappears, we record the date.

delta

delta_peek

Free. Check whether a USD spot pair is covered and inspect the exact $0.01 Base USDC preflight price before paying.

delta_preflight

Paid via x402 or MPP: $0.01 USDC on Base. Send the exact order venue, side, and size immediately before submission to obtain a signed PASS, BLOCK, or UNKNOWN from live availability, spread, freshness, depth, slippage, and divergence checks. Fail closed on BLOCK or UNKNOWN.

Endpoints

URL	Transport	State	Latency	Checked
https://butterflydelta.com/api/mcp	streamable-http	answering	2215 ms	9 min ago

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Butterfly Delta Preflight — questions

Answers built from our own checks of this server.

What can Butterfly Delta Preflight do?

It exposes 2 tools, read directly from the server on our last check. Among them: delta_peek, delta_preflight. The full list with descriptions is on this page — we take it from the server itself via tools/list, not from a README. How MCP servers expose tools in the first place →

Is Butterfly Delta Preflight working right now?

We send a real MCP handshake every 15 minutes. Over the last 24 hours 90 of 91 checks got a reply (98.9%), average response time 1371 ms. The bar chart above shows every period we have measured.

How do I connect Butterfly Delta Preflight?

Copy the ready config from this page — we generate it for Claude Code, Claude Desktop, Codex, Cursor and VS Code, each with the file path that client actually reads. It is a remote server, so there is nothing to install — the client connects to the address.

Does Butterfly Delta Preflight need an API key?

No. Butterfly Delta Preflight completed a full MCP handshake with us as an anonymous client and listed its tools without asking for anything. All 2 of them are readable on this page. This is what we observed, not what the docs claim.

How fast is Butterfly Delta Preflight?

It answers our handshake in 1371 ms on average, which is faster than 4% of all working MCP servers we measure. That is on the slow side — worth knowing if the tool sits inside an interactive loop. The comparison comes from our own checks across the whole registry, every 15 minutes.