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NEXAITECHAU

NEX Agent Co. MCP Server

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by NEXAITECHAU
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Python
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NEX Agent Co. — MCP Server

MCP server wrapping the 11 paid x402 endpoints of NEX Agent Co. as standard MCP tools. Agents that pay in USDC on Base get inference / data with no API keys.

Endpoints (each is a paid MCP tool)

Tool

Endpoint

Price

Description

nex_chat

/v1/chat

$0.001

Chat via nemotron-3.5-lightning:30b (1M ctx)

nex_code

/v1/code

$0.005

Code via qwen3-coder:30b

nex_code_pro

/v1/code-pro

$0.012

Premium code via qwen3-coder-next 80B-A3B (70.6% SWE-bench)

nex_vision

/v1/vision

$0.010

Vision+text via qwen3.8:27b

nex_embed

/v1/embed

$0.0001

Embeddings via nomic-embed-text

nex_chat_compat

/v1/chat/completions

$0.001

OpenAI-compatible chat completions

nex_crypto_price

/v1/crypto-price

$0.0001

Real-time crypto prices

nex_weather

/v1/weather

$0.0001

Weather forecast

nex_geo

/v1/geo

$0.0001

IP geolocation

nex_fx

/v1/fx

$0.0001

Currency exchange

nex_whois

/v1/whois

$0.0002

Domain WHOIS

Related MCP server: x402tools MCP Server

Install

pip install mcp httpx
# CDP creds required (env vars):
export CDP_API_KEY_ID=...
export CDP_API_KEY_SECRET=...
export CDP_WALLET_SECRET=...
# Wallet to pay from (defaults to 0x28F3D3fb24D4926BF5C35296c822d2a43D181177)
export NEX_WALLET=0x28F3D3fb24D4926BF5C35296c822d2a43D181177

Run

python server.py

Use from Claude Desktop / any MCP host

{
  "mcpServers": {
    "nex": {
      "command": "python",
      "args": ["/path/to/nex-agent-co-mcp/server.py"],
      "env": { "CDP_API_KEY_ID": "...", "CDP_API_KEY_SECRET": "...", "CDP_WALLET_SECRET": "..." }
    }
  }
}

How payment works

Each tool call:

  1. Server hits the NEX x402 endpoint, gets a 402 Payment Required with EIP-3009 payment spec

  2. Server signs transferWithAuthorization (gasless, EIP-712 typed data) for the price

  3. Server retries with the X-PAYMENT: <base64url> header

  4. Facilitator (PayAI / CDP) settles on-chain; NEX returns the response

The user's wallet pays USDC directly to NEX treasury 0x28F3D3fb24D4926BF5C35296c822d2a43D181177. No middleman custody.

Discovery

The upstream NEX x402 manifest is at:

https://charm-preparing-avon-ips.trycloudflare.com/.well-known/x402.json

Backed by

Local open-weight models running on M5 Max 128GB:

  • Qwen3.5 (Nemotron 3.5 Lightning, 1M ctx)

  • Qwen3-Coder (30B)

  • Qwen3-Coder-Next 80B-A3B (MoE)

  • Qwen3.8 27B (vision)

  • nomic-embed-text

No data leaves the machine for inference. USDC on Base settles per call.

More

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C
maintenance

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