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InferCPI

Official registry Productivity

AI inference price index: token prices, cost per capability, open vs closed, hosts, cost per task.

Source code Website Documentation

Install

Add this to your client's MCP configuration (Claude Desktop: claude_desktop_config.json; Cursor: .cursor/mcp.json; VS Code and others use the same "mcpServers" shape).

Remote (streamable-http)
Claude Code 
claude mcp add --transport http infercpi 'https://infercpi.com/mcp'
JSON configuration (Claude Desktop, Cursor, VS Code) 
{
    "mcpServers": {
        "infercpi": {
            "type": "http",
            "url": "https://infercpi.com/mcp"
        }
    }
}

Documentation

From the project's README on GitHub, refreshed weekly. Links open on GitHub.

Contents
  1. InferCPI API
  2. API
  3. MCP server
  4. Method and sources
  5. Licence

InferCPI API

InferCPI tracks what AI inference costs: list prices, what buyers actually pay, the cost of a fixed level of capability, open vs closed models, third-party hosts, self-hosting, and cost per completed task. Site: **https://infercpi.com**.

This repo holds the public API docs, examples and the MCP server. The data is free, needs no key, and is licensed CC BY 4.0: cite as InferCPI, infercpi.com.

API

Static JSON at https://infercpi.com/v1/. Full reference: **https://infercpi.com/api.html**.

FileWhat
latest.jsonLast value of every series, plus the weekly editorial note
index.jsonCatalogue of every series: point count, dates, method string, URL
series/<signal>/<key>.jsonFull history: points: [[unix_ts, value], ...] and method
basket.jsonEvery model priced this week: input, output and blended $/1M, context, Epoch ECI, open or closed
events.jsonLaunches, price cuts, increases and removals since Sep 2023
speed.jsonOur daily speed run: time to first token, tokens per second
token_mix.jsonTokens routed through OpenRouter per week, by lab and region
capex.jsonHyperscaler capex, chip and cloud revenue by quarter (SEC filings)
curl -s https://infercpi.com/v1/latest.json | jq '.latest["weighted_index/paid_usd_1m"]'

More in examples/.

MCP server

mcp_server.py gives agents ten read-only tools over the API: index_latest, index_series, index_catalogue, basket, model_price, events, speed, open_vs_closed, self_hosting, cost_per_task.

Hosted, no key: https://infercpi.com/mcp (streamable HTTP).

claude mcp add --transport http infercpi https://infercpi.com/mcp   # Claude Code

Claude.ai and Claude Desktop: Settings → Connectors → Add custom connector, paste the URL.

Or run it yourself:

mkdir -p ~/.local/share/infercpi
curl -so ~/.local/share/infercpi/mcp_server.py https://raw.githubusercontent.com/Infer-CPI/api/main/mcp_server.py
pip install mcp                                       # mcp 1.x or 2.x both work
claude mcp add infercpi -s user -- python3 ~/.local/share/infercpi/mcp_server.py   # Claude Code
python3 ~/.local/share/infercpi/mcp_server.py --http  # or: streamable HTTP on :8765

Claude Desktop (claude_desktop_config.json):

{ "mcpServers": { "infercpi": { "command": "python3", "args": ["/home/YOU/.local/share/infercpi/mcp_server.py"] } } }

It reads https://infercpi.com by default; set INFERCPI_BASE to point elsewhere.

Method and sources

How every series is built: **https://infercpi.com/methodology.html**. Inputs: LiteLLM and pydantic/genai-prices (MIT), Epoch AI Capabilities Index (CC BY 4.0), OpenRouter rankings (CC BY 4.0), SEC filings (public domain). Speed and cost per task are our own measurements.

Licence

Code in this repo: MIT. Index data: CC BY 4.0. Questions, corrections or a series you need: open an issue.

Frequently asked questions

What is InferCPI?

AI inference price index: token prices, cost per capability, open vs closed, hosts, cost per task.

How do I install InferCPI?

It runs as a remote server. In Claude Code: claude mcp add --transport http infercpi 'https://infercpi.com/mcp'. For other clients, paste the JSON configuration from this page into their MCP settings.

Does InferCPI need an API key?

Its registry entry lists no required key or secret. Some features may still need an account with the service it connects to.

Is InferCPI open source?

Its code is public on GitHub, but the repository does not declare a standard license.

Who maintains InferCPI?

It is published by Infer-CPI. AI.tn lists it but does not maintain or endorse it.

From the official MCP Registry. Listing is not an endorsement: review a server's code and permissions before giving it access to your data.