mcp-registry/com.butterflydelta/preflight · v1.1.0
As of 2026-10-26 21:36 UTC, the Butterflydelta Preflight MCP server is up with a Glimind reliability score of 92/100 (grade A). Over the last 30 days it answered 100% of Glimind's liveness checks. It had 7 outages in 90 days, with a median recovery of 7 minutes.
Signed exact-order pre-submit gate for crypto bots using live Coinbase and Gemini execution data.
Point your MCP client at this streamable-http endpoint: https://butterflydelta.com/api/mcp
2 of 2 tool(s) carry no readOnlyHint/destructiveHint annotations.
Annotate read-only tools with {"readOnlyHint": true}. Agents and gateways can then run them without a confirmation prompt, and route around destructive ones. How to fix →
1 tool(s) look like they change state (create/send/delete/pay…) but declare no destructiveHint.
Set annotations {"readOnlyHint": false, "destructiveHint": true|false, "idempotentHint": …}. Clients use these to ask the user before a side effect and to auto-approve safe reads. How to fix →
No tool declares an outputSchema.
Declare outputSchema and return structuredContent (MCP 2025-06-18+). Agents can then parse results without guessing, and chain tools reliably. How to fix →
Paste-ready definitions with the problems above fixed. Changes marked verify need a human look. All of them as JSON: /v1/readiness/mcp-registry%2Fcom.butterflydelta%2Fpreflight/fixes
{
"name": "delta_peek",
"description": "Free. Check whether a USD spot pair is covered and inspect the exact $0.01 Base USDC preflight price before paying.",
"inputSchema": {
"type": "object",
"required": [
"trade"
],
"properties": {
"trade": {
"type": "object",
"required": [
"pair"
],
"properties": {
"pair": {
"type": "string",
"pattern": "^[A-Za-z0-9]{2,15}[-/_]USD$",
"description": "USD spot pair, for example BTC-USD."
},
"side": {
"enum": [
"buy",
"sell"
],
"type": "string"
},
"venue": {
"enum": [
"coinbase",
"gemini"
],
"type": "string",
"description": "Optional exact-order venue. Include with side and baseSize."
},
"baseSize": {
"type": "number",
"exclusiveMinimum": 0
},
"orderType": {
"enum": [
"market",
"limit"
],
"type": "string",
"default": "market"
},
"limitPrice": {
"type": "number",
"exclusiveMinimum": 0
},
"minHealthyVenues": {
"type": "number",
"default": 2,
"maximum": 2,
"minimum": 1
},
"maxVenueSpreadBps": {
"type": "number",
"default": 10,
"maximum": 10000,
"minimum": 0
},
"maxQuoteAgeSeconds": {
"type": "number",
"default": 10,
"maximum": 3600,
"minimum": 0
},
"minDepthCoveragePct": {
"type": "number",
"default": 100,
"maximum": 100,
"minimum": 0
},
"maxEstimatedSlippageBps": {
"type": "number",
"default": 25,
"maximum": 10000,
"minimum": 0
},
"maxCrossVenueDivergenceBps": {
"type": "number",
"default": 20,
"maximum": 10000,
"minimum": 0
}
},
"description": "Execution policy for one intended USD-pair spot order.",
"additionalProperties": false
}
},
"additionalProperties": false
},
"annotations": {
"readOnlyHint": true
},
"title": "Preview Butterfly Delta coverage"
}{
"name": "delta_preflight",
"description": "Paid via x402 or MPP: $0.01 USDC on Base. Send the exact order venue, side, and size immediately before submission to obtain a signed PASS, BLOCK, or UNKNOWN from live availability, spread, freshness, depth, slippage, and divergence checks. Fail closed on BLOCK or UNKNOWN.",
"inputSchema": {
"type": "object",
"required": [
"trade"
],
"properties": {
"trade": {
"type": "object",
"required": [
"pair"
],
"properties": {
"pair": {
"type": "string",
"pattern": "^[A-Za-z0-9]{2,15}[-/_]USD$",
"description": "USD spot pair, for example BTC-USD."
},
"side": {
"enum": [
"buy",
"sell"
],
"type": "string"
},
"venue": {
"enum": [
"coinbase",
"gemini"
],
"type": "string",
"description": "Optional exact-order venue. Include with side and baseSize."
},
"baseSize": {
"type": "number",
"exclusiveMinimum": 0
},
"orderType": {
"enum": [
"market",
"limit"
],
"type": "string",
"default": "market"
},
"limitPrice": {
"type": "number",
"exclusiveMinimum": 0
},
"minHealthyVenues": {
"type": "number",
"default": 2,
"maximum": 2,
"minimum": 1
},
"maxVenueSpreadBps": {
"type": "number",
"default": 10,
"maximum": 10000,
"minimum": 0
},
"maxQuoteAgeSeconds": {
"type": "number",
"default": 10,
"maximum": 3600,
"minimum": 0
},
"minDepthCoveragePct": {
"type": "number",
"default": 100,
"maximum": 100,
"minimum": 0
},
"maxEstimatedSlippageBps": {
"type": "number",
"default": 25,
"maximum": 10000,
"minimum": 0
},
"maxCrossVenueDivergenceBps": {
"type": "number",
"default": 20,
"maximum": 10000,
"minimum": 0
}
},
"description": "Execution policy for one intended USD-pair spot order.",
"additionalProperties": false
}
},
"additionalProperties": false
},
"annotations": {
"readOnlyHint": false,
"destructiveHint": false,
"idempotentHint": false
},
"title": "Gate a crypto order before submission"
}Get an email or webhook when this server's readiness drops by 10+ points, tool-poisoning text appears, or a tool breaks:
curl -X POST https://glimind.com/v1/subscriptions -H 'content-type: application/json' -d '{"tools":["mcp-registry/com.butterflydelta/preflight"],"email":"[email protected]"}'Agents: watch_tool({"toolId": "mcp-registry/com.butterflydelta/preflight"}) over MCP.
delta_preflight ~425 tokensdelta_peek ~380 tokensStatic checks of the advertised tools/list (schema, descriptions, annotations, tool-poisoning patterns, names, size) plus observed protocol, uptime, latency and contract changes. Read-only: no tool is ever called. Weights: schema 15, docs 20, safety 15, efficiency 15, compatibility 15, protocol 5, reliability 10, stability 5. Token counts are estimates (~3.6 characters per token).
Operator? Fix these, then re-check live. Embed the readiness badge:
[](https://glimind.com/server/mcp-registry%2Fcom.butterflydelta%2Fpreflight?ref=badge)
<a href="https://glimind.com/server/mcp-registry%2Fcom.butterflydelta%2Fpreflight?ref=badge"><img src="https://glimind.com/v1/readiness/badge/mcp-registry%2Fcom.butterflydelta%2Fpreflight.svg" alt="MCP agent-readiness"></a>
.. image:: https://glimind.com/v1/readiness/badge/mcp-registry%2Fcom.butterflydelta%2Fpreflight.svg :target: https://glimind.com/server/mcp-registry%2Fcom.butterflydelta%2Fpreflight?ref=badge :alt: MCP agent-readiness
Glimind records every version of this server's tool definitions in a signed, append-only transparency log. Current manifest sha256:e3414eb89a468509…, first seen 2026-10-17, included at leaf 6602 of 75,586. Version history · verify what your client received.
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Glimind tells agents whether a server is up right now and how to call it, then fails over to a live alternative when it isn't.
Claude Code
claude mcp add --transport http glimind https://glimind.com/mcp
Claude Desktop · Windsurf · Cline (mcpServers JSON)
{
"mcpServers": {
"glimind": {
"type": "http",
"url": "https://glimind.com/mcp"
}
}
}
As of 2026-10-26 21:36 UTC, the Butterflydelta Preflight MCP server is up with a Glimind reliability score of 92/100 (grade A). Over the last 30 days it answered 100% of Glimind's liveness checks. It had 7 outages in 90 days, with a median recovery of 7 minutes.
Butterflydelta Preflight MCP server advertises 2 tools, including delta_peek, delta_preflight.
Point your MCP client at this streamable-http endpoint: https://butterflydelta.com/api/mcp
Glimind scanned all 2 tool definitions for tool-poisoning patterns — hidden or invisible characters, instructions that override the model, concealment from the user, requests to read credential or MCP config files, conversation exfiltration and cross-tool shadowing — and found none. This checks what the server tells the model, not what its code does; review the source before granting access to sensitive data.
Status page: 90-day uptime, every outage and how long it lasted.
Claim this listing to get the Verified operator marker, a remediation checklist and owner analytics, or embed the live badge from any of the tool pages above. Maintainers: alerts, deploy attestation and monthly reports.
Status is an automated estimate from Glimind's liveness checks (handshake and tool listing only; no tool is ever called) and may lag or differ from your network. Glimind is not affiliated with this server or its operator. Operator? Request a correction or opt out at https://glimind.com/opt-out.