mcp-registry/com.calcfleet/calculators · v1.0.0
As of 2026-10-24 03:00 UTC, the Calcfleet Calculators MCP server is up with a Glimind reliability score of 97/100 (grade A). Over the last 30 days it answered 100% of Glimind's liveness checks. It had 2 outages in 90 days, with a median recovery of 9 minutes.
Tested financial & practical calculators as free, no-auth MCP tools for AI agents.
Claude Code
claude mcp add --transport http calcfleet-calculators-mcp-server https://calcfleet.com/api/mcp
Claude Desktop · Windsurf · Cline (mcpServers JSON)
{
"mcpServers": {
"calcfleet-calculators-mcp-server": {
"type": "http",
"url": "https://calcfleet.com/api/mcp"
}
}
}
Third-party server, listed as discovered. Review its source before installing.
609 parameter(s) across 122 tool(s) have no description.
Add a "description" to each parameter with its format and an example ("ISO 8601 date, e.g. 2026-10-17"). This is the commonest cause of wrong arguments on the first call. How to fix →
122 of 122 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 →
122 tools on one server. Tool-selection accuracy drops as the menu grows, and some clients (e.g. Cursor) cap the number of active tools.
Group tools by task into smaller servers or toolsets, and merge near-duplicates behind one tool with a mode parameter. How to fix →
17 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 →
Loading this server's tool list costs an agent ~26,181 tokens before any work — more than 95% of MCP servers.
Split rarely-used tools into a separate server or a toolset the client can enable, or expose one "search tools" entry point. Many agents load every connected server's tools into every request. How to fix →
Handshake + tools/list takes ~1,512 ms.
Serve tools/list from memory, keep the process warm, and host close to your users. Every new agent session pays this before its first call.
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. 122 tool(s) still need parameter descriptions written by someone who knows the API. All of them as JSON: /v1/readiness/mcp-registry%2Fcom.calcfleet%2Fcalculators/fixes
{
"name": "ai_automation_payback_calculator",
"description": "AI Automation Payback Calculator (Process ROI) — Estimate the payback of automating a process with AI: task volume, time saved, review effort, and API costs give net monthly savings and break-even months.",
"inputSchema": {
"type": "object",
"$schema": "http://json-schema.org/draft-07/schema#",
"required": [
"tasksPerMonth",
"minutesPerTaskManual",
"loadedHourlyCost",
"automationCoveragePct",
"reviewMinutesPerTask",
"aiCostPerTask",
"platformCostMo",
"buildCost"
],
"properties": {
"buildCost": {
"type": "number",
"maximum": 500000,
"minimum": 0
},
"aiCostPerTask": {
"type": "number",
"maximum": 5,
"minimum": 0
},
"tasksPerMonth": {
"type": "number",
"maximum": 1000000,
"minimum": 10
},
"platformCostMo": {
"type": "number",
"maximum": 5000,
"minimum": 0
},
"loadedHourlyCost": {
"type": "number",
"maximum": 300,
"minimum": 10
},
"minutesPerTaskManual": {
"type": "number",
"maximum": 240,
"minimum": 0.5
},
"reviewMinutesPerTask": {
"type": "number",
"maximum": 60,
"minimum": 0
},
"automationCoveragePct": {
"type": "number",
"maximum": 100,
"minimum": 1
}
}
},
"annotations": {
"readOnlyHint": false,
"destructiveHint": false,
"idempotentHint": false
},
"title": "AI Automation Payback Calculator (Process ROI)"
}{
"name": "ai_build_vs_buy_calculator",
"description": "AI Build vs Buy Calculator (API vs Self-Host) — Compare the monthly cost of a hosted LLM API against self-hosting on your own GPUs. Find the break-even token volume and see which option is cheaper for you.",
"inputSchema": {
"type": "object",
"$schema": "http://json-schema.org/draft-07/schema#",
"required": [
"apiPricePerMtok",
"selfHostFixedPerMonth",
"tokensPerMonth"
],
"properties": {
"tokensPerMonth": {
"type": "number",
"maximum": 1000000,
"minimum": 0
},
"apiPricePerMtok": {
"type": "number",
"maximum": 1000,
"exclusiveMinimum": 0
},
"selfHostFixedPerMonth": {
"type": "number",
"maximum": 10000000,
"minimum": 0
}
}
},
"annotations": {
"readOnlyHint": false,
"destructiveHint": false,
"idempotentHint": false
},
"title": "AI Build vs Buy Calculator (API vs Self-Host)"
}{
"name": "balance_transfer_calculator",
"description": "Balance Transfer Calculator — See how much a 0% balance transfer saves vs staying on your current APR. Enter the fee, promo months, and planned payment to find out if it is worth it.",
"inputSchema": {
"type": "object",
"$schema": "http://json-schema.org/draft-07/schema#",
"required": [
"balance",
"currentAprPct",
"transferFeePct",
"promoMonths",
"revertAprPct",
"monthlyPayment"
],
"properties": {
"balance": {
"type": "number",
"maximum": 1000000,
"exclusiveMinimum": 0
},
"promoMonths": {
"type": "integer",
"maximum": 84,
"minimum": 1
},
"revertAprPct": {
"type": "number",
"maximum": 100,
"minimum": 0
},
"currentAprPct": {
"type": "number",
"maximum": 100,
"minimum": 0
},
"monthlyPayment": {
"type": "number",
"maximum": 1000000,
"minimum": 0
},
"transferFeePct": {
"type": "number",
"maximum": 10,
"minimum": 0
}
}
},
"annotations": {
"readOnlyHint": false,
"destructiveHint": false,
"idempotentHint": false
},
"title": "Balance Transfer Calculator"
}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.calcfleet/calculators"],"email":"[email protected]"}'Agents: watch_tool({"toolId": "mcp-registry/com.calcfleet/calculators"}) over MCP.
rag_cost_calculator ~385 tokensrent_vs_buy_calculator ~372 tokensllm_self_host_vs_api_calculator ~337 tokensbaking_pan_conversion_calculator ~320 tokenshome_affordability_calculator ~312 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.calcfleet%2Fcalculators?ref=badge)
<a href="https://glimind.com/server/mcp-registry%2Fcom.calcfleet%2Fcalculators?ref=badge"><img src="https://glimind.com/v1/readiness/badge/mcp-registry%2Fcom.calcfleet%2Fcalculators.svg" alt="MCP agent-readiness"></a>
.. image:: https://glimind.com/v1/readiness/badge/mcp-registry%2Fcom.calcfleet%2Fcalculators.svg :target: https://glimind.com/server/mcp-registry%2Fcom.calcfleet%2Fcalculators?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 sha256:96a59be9f92292ab…, first seen 2026-10-17, included at leaf 11948 of 56,159. 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 2026-10-24 03:00 UTC, the Calcfleet Calculators MCP server is up with a Glimind reliability score of 97/100 (grade A). Over the last 30 days it answered 100% of Glimind's liveness checks. It had 2 outages in 90 days, with a median recovery of 9 minutes.
Calcfleet Calculators MCP server advertises 122 tools, including 401k_match_calculator, ai_agent_cost_calculator, ai_automation_payback_calculator, ai_build_vs_buy_calculator, ai_job_exposure_calculator.
Point your MCP client at this streamable-http endpoint: https://calcfleet.com/api/mcp
Glimind scanned all 122 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.