ZBS Index What actually exists in applied AI, with the source next to it

mcp server

zero-core-budget

Agent spending mgmt, budget tracking, ROI. Zero Core Budget.

Description as published by the maintainer. Source

  • version 1.0.0
  • slowing

slowing — Registry entry last updated 2026-04-30.

What this server can do

6 functions, named and described by the server itself. Parameter names are shown because they say more about what a function does than its name usually does.

check_spend(agent_id, category, amount_usd, service_id)
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. Required: agent_id, service_id, amount_usd, category.
get_spending_report(period, agent_id)
Detailed spending analytics report. Returns total spent, category breakdown, top services with ROI, and optimization recommendations. Use to understand spending patterns and find inefficiencies. Required: agent_id, period.
health
Check Harvey Budget server status, uptime, and payment network configuration.
list_tools
List all available Harvey Budget tools with pricing and input requirements. Use this for discovery.
register_agent(agent_id, category_limits, daily_limit_usd, weekly_limit_usd)
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. Required: agent_id, daily_limit_usd, weekly_limit_usd.
report_spend(agent_id, category, amount_usd, service_id, value_received, outcome_success)
Record a completed spend with optional outcome tracking. Call this AFTER paying for a service to track spending and build ROI history. Required: agent_id, service_id, amount_usd, category.

Last successful function declaration observed on . Source: https://budget.rugslayer.com/mcp. We list what the server declared; we do not call any of these functions.

Endpoint status observed on . Source: https://budget.rugslayer.com/mcp.

Signals

These are separate measurements of different things. They are deliberately not combined into one score, because a popularity number that mixes website traffic with saves and stars cannot be checked or acted on.

Signal Value What it measures Window Observed Source
Latest published version 1.0.0 Latest version string the maintainer published to the registry. as of fetch Model Context Protocol
Registry record last updated 2026-04-30 When the registry record was last updated by its maintainer. point in time Model Context Protocol
First listed in the MCP Registry 2026-04-30 Date this server was first published to the official MCP Registry. Not a usage or quality measure. point in time Model Context Protocol
mcp tools declared 6 tools Number of functions the server itself declared when asked to list them. This is what the server offers an agent, not a measure of how well any of them work. as of probe budget.rugslayer.com
mcp endpoint status ok The server listed 6 functions when asked. as of probe budget.rugslayer.com

Where to get it

Also from meltingpixelsai

This record as data

Every field on this page, with its source and observation date, is in the catalog JSON. Fetch the whole kind at once instead of parsing this HTML.

GET /api/v1/entries/mcp_server.json

Sources

  1. Tools declared by the MCP server at https://budget.rugslayer.com/mcp — budget.rugslayer.com, observed , trust tier 1.
  2. Official MCP Registry — Model Context Protocol, observed , trust tier 1.