LABSCO SUMMARY

The model you name decides whether the answer is current, and that is the whole decision.

The tool description draws the one distinction that matters — the sonar models go out to the web, Grok 4 answers from what it was trained on — and everything else on the call is a passthrough. This is a route to another model rather than a search index of its own, so the quality question is really a question about OpenRouter's models and your budget for them.

What it is

A one-tool search server that forwards a query to Perplexity or Grok models through OpenRouter and returns the answer.

What you get

A single search call taking a query and the model to answer it
Perplexity's sonar, sonar-pro, sonar-reasoning-pro and sonar-deep-research search the web for current information
Grok 4 answers from training data, without real-time search
maxTokens, temperature and timeout set per call

Requirements

OPENROUTER_API_KEY, and OpenRouter access to whichever of these models you name in the call.

Setup effort

One command plus a key — bunx nexus-mcp, then supply credentials

See installation options

USE CASES

01

Getting a current answer without leaving the session

Name one of the sonar models and the query goes to the web, so a question about something that changed after your model's training data ends comes back answered rather than guessed.

search

02

Choosing how much a question is worth spending on

The model argument is the dial: sonar for a quick current answer, sonar-deep-research when the question deserves the longer route, Grok 4 when no live search is needed at all — and maxTokens and timeout bound whichever you pick.

search

1 tool

Counted once with only startup setup. Other versions, modes or optional credentials may expose a different list.

`search`

Nexus AI-powered search using Perplexity and Grok models via OpenRouter. Perplexity models (sonar, sonar-pro, sonar-reasoning-pro, sonar-deep-research) search the web for current information. Grok 4 provides responses from training data without real-time search.

BEFORE YOU INSTALL

What to know first

Tools you get

1 tool when we connected. Sonar, sonar-pro, sonar-reasoning-pro, sonar-deep-research and grok-4 are values of the search model parameter, not tools; access depends on your OpenRouter account. The server only reads.

Requires

Bun 1.0+
OPENROUTER_API_KEY in your environment

Where it runs

The documented client runs the server on your machine.

CONTEXT COST

Light Standing cost

Rated by the size of the one tool definition that rides along on every turn

INSTALLATION

Connect your client

Server setup

TERMINAL

bunx nexus-mcp

MCP Clients

Claude Code

CLAUDE CODE · JSON

{
  "mcpServers": {
    "nexus": {
      "command": "bunx",
      "args": [
        "nexus-mcp"
      ],
      "env": {
        "OPENROUTER_API_KEY": "<YOUR_OPENROUTER_API_KEY>"
      }
    }
  }
}

.mcp.json at your project root

Nexus