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NexusBridge MCP Server

by guhank

NexusBridge MCP Server

A Model Context Protocol server that gives AI agents access to 200+ AI models and 10 service categories through a unified, metered API. One API key, one integration, transparent per-call pricing.

API Base: https://syntss.com
Smithery: smithery.ai/servers/guhank/nexusbridge-mcp-server
GitHub: github.com/guhank/nexusbridge-mcp-server

Tools

Tool

Description

nexusbridge_catalog

Retrieve the full service catalog with slugs, descriptions, per-call prices, and your current credit balance. Call this first to discover available services.

nexusbridge_execute

Execute any NexusBridge service by its slug. Pass service-specific parameters. Credits are deducted automatically. Returns the upstream provider's response.

nexusbridge_balance

Check your current credit balance (USD) and the number of active services available. Use before expensive operations to verify sufficient funds.

nexusbridge_catalog

Returns every available service with its slug, name, category, description, and per-call price in USD. Also returns your current credit balance.

Parameters: None

Example response:

{
  "services": [
    { "slug": "llm-chat", "name": "LLM Chat", "category": "ai", "pricePerCall": 0.005 },
    { "slug": "web-search", "name": "Web Search", "category": "search", "pricePerCall": 0.01 }
  ],
  "creditBalance": 24.50
}

nexusbridge_execute

Execute a service by passing its slug and service-specific parameters.

Parameters:

Parameter

Type

Required

Description

slug

string

Yes

Service slug from the catalog (e.g., llm-chat, web-search, sentiment)

params

object

No

Service-specific parameters (see examples below)

Examples:

// LLM Chat — use any of 200+ models
{ "slug": "llm-chat", "params": { "messages": [{"role": "user", "content": "Explain quantum computing"}], "model": "deepseek/deepseek-chat-v3-0324" } }

// Sentiment Analysis
{ "slug": "sentiment", "params": { "text": "I love this product! Best purchase I've ever made." } }

// Web Search
{ "slug": "web-search", "params": { "query": "latest AI news March 2026" } }

// Text Summarization
{ "slug": "summarize", "params": { "text": "Long article text here..." } }

// Translation
{ "slug": "translation", "params": { "text": "Hello world", "to": "es" } }

// Code Generation
{ "slug": "llm-code", "params": { "prompt": "Write a Python function to calculate fibonacci numbers" } }

// Image Generation
{ "slug": "image-gen", "params": { "prompt": "A serene mountain landscape at sunset" } }

// Text Embedding
{ "slug": "text-embedding", "params": { "text": "semantic search query" } }

Example response:

{
  "success": true,
  "service": "llm-chat",
  "charged": 0.005,
  "remainingBalance": 24.495,
  "result": {
    "choices": [{ "message": { "content": "Quantum computing uses..." } }]
  }
}

nexusbridge_balance

Returns your credit balance and the count of active services.

Parameters: None

Example response:

{
  "creditBalance": 24.50,
  "serviceCount": 10
}

Related MCP server: gpu-bridge-mcp-server

Available Services

Service

Slug

Price/Call

Description

LLM Chat

llm-chat

$0.005

Chat completions with GPT-4o, Claude, Gemini, DeepSeek, Llama, and 200+ models via OpenRouter

Code Generation

llm-code

$0.008

Code generation, refactoring, and completion optimized for development tasks

Image Generation

image-gen

$0.05

Create images from text prompts using DALL-E, SDXL, and Flux models

Text Embedding

text-embedding

$0.001

Vector embeddings for RAG pipelines, semantic search, and clustering

Web Search

web-search

$0.01

Structured web search results with titles, URLs, and snippets

Document Parser

doc-parser

$0.02

Extract text and structured data from PDFs, images, and documents

Sentiment Analysis

sentiment

$0.003

Classify text sentiment (positive/negative/neutral) with confidence scores and emotion detection

Translation

translation

$0.005

Neural machine translation across 100+ languages

Summarization

summarize

$0.008

Configurable-length text summaries from long documents

Code Execution

code-exec

$0.015

Run code in sandboxed Python, Node.js, and Go environments

Installation

Install directly from Smithery with one click. Configure your NexusBridge API key when prompted.

Claude Desktop

Add to your claude_desktop_config.json:

{
  "mcpServers": {
    "nexusbridge": {
      "command": "npx",
      "args": ["-y", "nexusbridge-mcp-server", "--stdio"],
      "env": {
        "NEXUSBRIDGE_API_KEY": "nb_sk_your_key_here"
      }
    }
  }
}

Cursor / Windsurf / Other MCP Clients

Use the same configuration pattern — set NEXUSBRIDGE_API_KEY as an environment variable and run via npx -y nexusbridge-mcp-server --stdio.

Docker

docker build -t nexusbridge-mcp .
docker run -p 8000:8000 \
  -e NEXUSBRIDGE_API_KEY=nb_sk_your_key \
  nexusbridge-mcp

Manual

git clone https://github.com/guhank/nexusbridge-mcp-server.git
cd nexusbridge-mcp-server
npm install
NEXUSBRIDGE_API_KEY=nb_sk_your_key npm start

Usage

  1. Get an API key — Purchase credits at syntss.com. Credits start at $10. You'll receive an nb_sk_... API key.

  2. Install the MCP server — Use Smithery, Claude Desktop config, or run manually (see Installation above).

  3. Discover services — Your AI agent calls nexusbridge_catalog to see all available services, pricing, and your credit balance.

  4. Execute services — Call nexusbridge_execute with the service slug and parameters. Credits are deducted per call.

  5. Monitor spending — Call nexusbridge_balance to check remaining credits at any time.

Typical Agent Workflow

Agent → nexusbridge_catalog           → "I see 10 services, balance is $24.50"
Agent → nexusbridge_execute(llm-chat) → "Got response from DeepSeek, charged $0.005"
Agent → nexusbridge_execute(sentiment)→ "Text is positive (0.94 confidence), charged $0.003"
Agent → nexusbridge_balance           → "Balance is $24.492"

Environment Variables

Variable

Required

Default

Description

NEXUSBRIDGE_API_KEY

Yes

Your NexusBridge API key (starts with nb_sk_)

NEXUSBRIDGE_BASE_URL

No

https://syntss.com

Base URL of the NexusBridge API

PORT

No

8000

HTTP port for Smithery/hosted mode

Transport Modes

Mode

Flag

Use Case

HTTP

(default)

Smithery hosted deployment, remote MCP clients

stdio

--stdio

Claude Desktop, Cursor, local MCP clients

Getting API Credits

Tier

Credits

Approx. LLM Calls

Starter

$10

~2,000

Builder

$25

~5,000

Pro

$50

~10,000

Scale

$100

~20,000

Purchase at syntss.com or via Stripe. Credits never expire.

License

MIT

A
license - permissive license
-
quality - not tested
D
maintenance

Maintenance

Maintainers
Response time
Release cycle
Releases (12mo)
Commit activity

Resources

Unclaimed servers have limited discoverability.

Looking for Admin?

If you are the server author, to access and configure the admin panel.

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