Butterfly Delta Preflight

com.butterflydeltaPublished by butterflydelta.comOfficial publisherv1.1.0Updated Oct 27, 2026

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

VerifiedStreamable HTTPWeb executableFinanceDeveloper Tools

Overview

AI-generated overview

Remote MCP server that gives crypto trading bots a signed pre-submit PASS, BLOCK or UNKNOWN verdict on an exact spot order using live Coinbase and Gemini data.

What you can do
  • Check coverage and the exact $0.01 USDC preflight price for a USD spot pair before paying.
  • Submit an exact order (venue, side, size) just before submission to get a signed PASS, BLOCK or UNKNOWN verdict.
  • Have the verdict based on live availability, spread, freshness, depth, slippage and divergence checks.
  • Treat BLOCK or UNKNOWN as a fail-closed stop.
When to use it
Use it when an automated crypto trading bot needs a last-moment gate before sending a spot order, so that stale, thin or divergent market conditions stop the order instead of filling it.
Requirements
A remote streamable HTTP endpoint; no local package or declared environment variables. The paid preflight tool costs $0.01 USDC on Base, settled via x402 or MPP, so a funded Base USDC wallet and a client that supports those payment flows are needed.
Before you install
The preflight tool spends real money: $0.01 USDC on Base per call, paid through x402 or MPP. The verdict is advisory and signed, but it does not place or cancel orders itself; your bot must still enforce fail-closed behavior on BLOCK or UNKNOWN. Order details are sent to a third-party service.

Installation

In SourceWeft

  1. Open Butterfly Delta Preflight in the dashboard and add it to a workspace.
  2. Enable the server for the chats that should use its tools.

Web executable via Streamable HTTP. Remote servers run from the web runtime once configured in a workspace.

Use with an agent

Paste this prompt into Claude Code, Codex, Cursor or another agent — or into SourceWeft chat. The agent reads this server's install guide, shows you its publisher, endpoint and sign-in, and adds it to your client once you agree. Keys never go into a command.

Read https://sourceweft.com/mcp/com.butterflydelta%2Fpreflight/install.md and connect the MCP server it describes to my client. Before changing any config, show me its publisher, endpoint and sign-in method and wait for my OK. Never put an API key in a command or in a file I would commit; ask me where it should come from.

Read the install guide the agent follows

Other MCP clients

Add this to your client's mcpServers config.

{
  "mcpServers": {
    "butterfly-delta-preflight": {
      "type": "http",
      "url": "https://butterflydelta.com/api/mcp"
    }
  }
}

Tools

2

delta_peek

Preview Butterfly Delta coverage

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

Parameterstraderequired

delta_preflight

Gate a crypto order before submission

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.

Parameterstraderequired

Version history

1
  1. v1.1.0LatestSep 16, 2026

Score

83% of the applicable checks met

How complete this listing is, computed from the registry entry, the endpoint and public sources. Not a rating of the server and not a statement that it is safe or working today: reachability is a dated check, and no installs or reviews go into the score.

  • Reached in the last 30 daysRequired25 pts
  • Auth declaredRequired10 pts
  • Tools listedRequired15 pts
  • DescriptionRequired15 pts
  • Logo10 pts
  • Documentation15 pts

    Declare a GitHub repository with a README, or serve resource_documentation in the OAuth protected-resource metadata.

  • LicenseNot applicable

    A hosted service is used under its provider's terms, so no license is expected here. This check is left out of the percentage.