Agent Cost Hub MCP server

A free, read-only MCP server that lets AI assistants (Claude, Cursor, and other MCP clients) answer: "What will this AI agent cost me per month?"

It uses the same price list and formula as agentcosthub.com. The price list covers 79 models and is checked daily.

• Endpoint: https://agentcosthub.com/mcp (Streamable HTTP, no sign-in, no API key)

• Setup page: https://agentcosthub.com/mcp/

• Official MCP Registry: com.agentcosthub/agent-cost-hub

• The server makes no model calls, needs no secrets, and doesn't store your queries.

Connect

Claude (claude.ai: Pro, Max, Team) Settings → Connectors → Add custom connector → paste https://agentcosthub.com/mcp → choose No sign-in.

Claude Desktop (claude_desktop_config.json; Desktop uses stdio, so it bridges with mcp-remote):

{ "mcpServers": { "agentcosthub": { "command": "npx", "args": ["-y", "mcp-remote", "https://agentcosthub.com/mcp"] } } }

Cursor (~/.cursor/mcp.json):

{ "mcpServers": { "agentcosthub": { "url": "https://agentcosthub.com/mcp" } } }

Then ask, for example: "What's the cheapest model for a coding agent?" or "Compare Claude Sonnet 5.5 and GPT-5 for a RAG chatbot."

Related MCP server: io.github.ufhouck/aicost-cli

Tools

Presets

Formula steps × (in × (1−cached%) × in_price + in × cached% × cached_price + out × out_price) ÷ 1M × calls/day × 30

The estimate uses list prices and leaves out cache-write fees. Every result includes prices_last_verified and a link to the matching agentcosthub.com page.

Example outputs (live, 2 Nov 2026)

cheapest_models_for { "preset": "coding_agent" }, top 5:

estimate_cost { "model": "anthropic/claude-opus-5.5", "preset": "coding_agent" } → $1,620/month. With "cached_percent": 90 it drops to $936/month.

The trimmed raw response looks like this:

{
  "workload": { "input_tokens": 20000, "output_tokens": 1500, "calls_per_day": 50,
                "steps_per_task": 15, "cached_percent": 50, "preset": "coding_agent" },
  "ranking": [ { "model": "anthropic/claude-haiku-5.5", "name": "Claude Haiku 5.5",
                 "monthly_usd": 41.625, "monthly": "$41.63", "per_task_usd": 0.02775,
                 "page": "https://agentcosthub.com/models/anthropic--claude-haiku-5.5/" } ],
  "prices_last_verified": "2026-11-02",
  "source": "https://agentcosthub.com"
}

Prices change, so these numbers are a snapshot. A live call always returns the current figures.

Try it from a terminal:

curl -s https://agentcosthub.com/mcp -H 'content-type: application/json' \
  -H 'accept: application/json, text/event-stream' \
  -d '{"jsonrpc":"2.0","id":1,"method":"tools/call","params":{"name":"cheapest_models_for","arguments":{"preset":"chatbot"}}}'

Or use the MCP Inspector:

npx @modelcontextprotocol/inspector --cli https://agentcosthub.com/mcp --transport http --method tools/list

Repo layout

• src/mcp-core.mjs is the JSON-RPC MCP server, written with no SDK. It's a source reference: it imports the price data and formula from the agentcosthub.com site build, which isn't in this repo.

• dist/mcp-core.js is a self-contained bundle that includes a price snapshot. The hosted endpoint is always the current version.

• src/worker.mjs and src/wrangler.toml are an optional standalone Cloudflare Worker.

• server.json is the MCP Registry manifest.

Notes

• Estimates only. Cheaper models aren't always as capable, so test on your own tasks.

• AI tools helped build this project, and every price is checked against the providers' official pages.

• Issues and suggestions are welcome. You can also email hello@agentcosthub.com.

MIT licensed. Made by Agent Cost Hub.