io.
by meltingpixelsai · remote · local (npm) · no sign-in to list tools · v1.0.0 · published by GitHub user meltingpixelsai
Agent spending mgmt, budget tracking, ROI. Zero Core Budget.
6 tools: 4 change things and 2 only read.
Scanned Oct 21, 2026
- Deletes or cancels0Claude Code: deny
- Can't be undone0Claude Code: ask
- Changes things4Claude Code: ask: see these tools
- Only reads2Claude Code: allow: see these tools
No check matched anything in the tool definitions. No finding is not a safety guarantee. How the checks work.
claude mcp add --transport http zero-core-budget https://budget.rugslayer.com/mcpTools
Open a tool for its reasons and full description. Descriptions are the publisher's own words, shown as they are.
6 tools
Changes things 4Claude Code: ask
check_spendPre-spend budget approval check.No findings
Why it is in this group
- Nothing in its name or description says what it does, so it is counted as a write.
Description, as the server wrote it Pre-spend budget approval check. Verifies daily/weekly/category limits, estimates ROI from historical data, and suggests cheaper alternatives. Call this BEFORE paying for any service.
Annotations the server declares
- paymentHint: true
- paymentPriceUSD: $0.001
- paymentNetworks: [object Object]
- paymentVersion: 1
healthCheck Harvey Budget server status, uptime, and payment network configuration.No findings
Why it is in this group
- Nothing in its name or description says what it does, so it is counted as a write.
Description, as the server wrote it Check Harvey Budget server status, uptime, and payment network configuration.
register_agentRegister an agent with daily and weekly budget limits.No findings
Why it is in this group
- Nothing in its name or description says what it does, so it is counted as a write.
Description, as the server wrote it Register an agent with daily and weekly budget limits. Free tool - call this before using check_spend or report_spend. Upserts if agent already exists.
report_spendRecord a completed spend with optional outcome tracking.No findings
Why it is in this group
- Nothing in its name or description says what it does, so it is counted as a write.
Description, as the server wrote it Record a completed spend with optional outcome tracking. Call this AFTER paying for a service to track spending and build ROI history.
Annotations the server declares
- paymentHint: true
- paymentPriceUSD: $0.001
- paymentNetworks: [object Object]
- paymentVersion: 1
Only reads 2Claude Code: allow
get_spending_reportDetailed spending analytics report.No findings
Why it is in this group
- The name "get_spending_report" says "get": a word for reading.
Description, as the server wrote it Detailed spending analytics report. Returns total spent, category breakdown, top services with ROI, and optimization recommendations. Use to understand spending patterns and find inefficiencies.
Annotations the server declares
- paymentHint: true
- paymentPriceUSD: $0.005
- paymentNetworks: [object Object]
- paymentVersion: 1
list_toolsList all available Harvey Budget tools with pricing and input requirements.No findings
Why it is in this group
- The name "list_tools" says "list": a word for reading.
Description, as the server wrote it List all available Harvey Budget tools with pricing and input requirements. Use this for discovery.
This is not a safety rating, and no finding is not a safety guarantee. The groups and findings come from fixed checks of the tool definitions the server returned on the date shown, not from its code or what it does when called. How the checks work.
Exfil surface
Which tools read private data, which read text someone else can write, and which can send data out. One of each is a path a prompt injection can use.
No private-data, untrusted-input, outbound path in this server alone: no tool is tagged private-data or untrusted-input or outbound.
- Reads private data0
- Reads files, mail, messages, databases, secrets, calendars or repositories.
- Reads text others write0
- Brings in text someone else can write: web pages, inbound email, messages, issues and comments.
- Can send data out0
- Can carry data to people or systems: it sends, posts or publishes, or takes a recipient, channel or URL.
Other servers in the same agent add their own tools to these paths. Audit your whole setup to see them together.
Remote posture
What anyone on the internet sees at the remote endpoint: an anonymous initialize and tools/list, and the public OAuth metadata.
Looked at Oct 22, 2026, 15:02 UTC, unchanged since Oct 22, 2026. No credentials were sent and no tool was called. What is looked at.
- Reachable
- yes
- HTTP status of an anonymous initialize
- 200
- tools/list served without credentials
- yes
- Tools that change things, listed without credentials
- 4
- Protocol version
- 2025-06-18
- WWW-Authenticate on 401
- not observed
- resource_metadata in WWW-Authenticate
- none
- RFC 9728 protected resource metadata
- none
- Authorization servers
- none
- Legacy HTTP+SSE transport
- no
- Dynamic client registration
- not observed
- Client ID metadata documents
- not observed
- WarnThe whole server
The endpoint served tools/list without credentials, and the list has 4 tools that change things (4 write). Whether a call also works without credentials was not tested: tools are never called.
What this check looks forMatched text
https://budget.rugslayer.com/mcp: tools/list returned 6 tools to an anonymous client, including health (write), register_agent (write), check_spend (write), report_spend (write)
Install
Pinned to version 1.0.0. Values in angle brackets are yours to fill in.
claude mcp add --transport http zero-core-budget https://budget.rugslayer.com/mcpRun in a terminal.
Claude Code permissions
Allow the reads, ask before a change or a way out, deny the deletes. Paste into .claude/settings.json.
{
"permissions": {
"allow": [
"mcp__zero-core-budget__list_tools",
"mcp__zero-core-budget__get_spending_report"
],
"ask": [
"mcp__zero-core-budget__health",
"mcp__zero-core-budget__register_agent",
"mcp__zero-core-budget__check_spend",
"mcp__zero-core-budget__report_spend"
],
"deny": []
}
}Tools that only read are allowed, tools that change things ask first, tools that delete or cancel are denied. A read that can send data out (it takes a URL, say) asks first too. It assumes the server is installed as zero-core-budget. Review it before you use it.