Index9

io.github.index9-orgPublished by GitHub account index9-orgv6.5.2Updated Oct 27, 2026

Discover, shortlist, compare, cost-model, and live-test 300+ AI models from your editor

VerifiedSTDIODesktop onlyData & AnalyticsAI & ML

Overview

AI-generated overview

Index9 lets an assistant search, compare, cost-model and live-test 300+ AI models from the editor via a local stdio MCP server.

What you can do
  • List providers, capabilities, modalities and tokenizers to see what is available
  • Search AI models by semantic query or filters, and fetch full metadata for up to 100 IDs or aliases
  • Compare 2-10 models side by side on pricing, context, capabilities and tokenizer
  • Run live inference or dry-run cost estimates on 1-10 models
When to use it
Useful when choosing between AI models for a task and you want pricing, context and capability comparisons, or a quick live test, without leaving the editor.
Requirements
Runs locally via npx (Node.js) over stdio. Live test_model calls need an OpenRouter API key set as OPENROUTER_API_KEY in the client config; dry-run cost estimates work without it. Network access to the Index9 and OpenRouter APIs.
Before you install
The OpenRouter API key is a billable credential passed in the client config; live test_model calls send prompts to OpenRouter and may incur charges. Model queries and test prompts go to third-party services. Prefer dryRun for cost estimates when you do not want to spend.

Installation

In SourceWeft

  1. Open Index9 in the dashboard and add it to a workspace.
  2. Enable the server for the chats that should use its tools.

Desktop only via STDIO. STDIO servers start a local process, so they need the SourceWeft desktop host.

Other MCP clients

Follow the launch instructions in the repository.

README

@index9/mcp

Discover, shortlist, compare, cost-model, and live-test 300+ AI models from your editor

Per-editor install configs (Cursor, VS Code, Claude Code, Codex): https://index9.dev/#install

Install

bash
npx -y @index9/mcp@latest

Generic MCP client config:

json
{  "mcpServers": {    "index9": {      "command": "npx",      "args": ["-y", "@index9/mcp@latest"],      "env": {        "OPENROUTER_API_KEY": "sk-or-..."      }    }  }}

Claude Code one-liner: claude mcp add --transport stdio index9 -- npx -y @index9/mcp.

OpenRouter API key

Required for live test_model calls. Set OPENROUTER_API_KEY in your MCP client config. dryRun=true works without it.

Tools

  • list_facets: List available providers, capabilities, modalities, and tokenizers
  • find_models: Search AI models by semantic query or filters
  • get_models: Fetch full model metadata for up to 100 IDs or aliases
  • compare_models: Diff 2-10 models across pricing, context, capabilities, and tokenizer
  • test_model: Run live inference or dry-run cost estimates on 1-10 models (requires OpenRouter API key)

Response metadata

All tool responses include an _index9 object with:

  • apiBaseUrl: API base URL used for the request

Error responses also include:

  • status: upstream HTTP status code
  • _index9.retryAfterSeconds: present when Retry-After is returned
  • _index9.rateLimit: present when rate-limit headers are returned (x-ratelimit-limit, x-ratelimit-remaining, x-ratelimit-reset)

Source: README.md at commit 8669dc0

Tools

0
SourceWeft has not started this package in its sandbox yet, so its tools are not known.

Version history

1
  1. v6.5.2LatestSep 16, 2026

Score

40% of the applicable checks met

How complete this listing is, computed from the registry entry, the endpoint and public sources. Not a rating of the server and not a statement that it is safe or working today: reachability is a dated check, and no installs or reviews go into the score.

  • Reached in the last 30 days25 pts

    Keep the endpoint answering the MCP handshake; SourceWeft probes it every 30 days.

  • Auth declared10 pts

    Declare the credential headers in the registry entry, or keep the endpoint answering the probe so its auth can be classified.

  • Tools listed15 pts

    Answer tools/list without a credential, or ship a package that starts in a sandbox without one.

  • DescriptionRequired15 pts
  • Logo10 pts
  • Documentation15 pts
  • License10 pts

    Declare a license in the repository or the registry entry.