NEX Agent Co. MCP Server
OfficialProvides web search functionality using DuckDuckGo instant-answer results.
Provides company enrichment and lookup using Wikipedia as a data source alongside SEC EDGAR.
Click on "Install Server".
Wait a few minutes for the server to deploy. Once ready, it will show a "Started" state.
In the chat, type
@followed by the MCP server name and your instructions, e.g., "@NEX Agent Co. MCP Serverwhat's the current Bitcoin price?"
That's it! The server will respond to your query, and you can continue using it as needed.
Here is a step-by-step guide with screenshots.
NEX Agent Co. — MCP Server
MCP server wrapping all 31 paid x402 endpoints of NEX Agent Co. as standard MCP tools. Agents that pay in USDC on Base get inference, data, security, and discovery — no API keys.
Default mode: every call goes to the free mirror at
/v1/free/<endpoint>(30 req/min/IP, no payment). Perfect for dev, eval, and prototypes.Paid mode: pass
paid: trueon any call. Server signs an EIP-3009transferWithAuthorizationfor the tier's price in USDC and retries withX-PAYMENT.
Tools (31 total)
Inference (6)
Tool | Endpoint | Paid price | Description |
|
| $0.001 | Chat via nemotron-3.5-lightning:30b (1M ctx, 4x throughput) |
|
| $0.001 | OpenAI-compatible chat completions |
|
| $0.005 | Code via qwen3-coder:30b |
|
| $0.012 | Premium code via qwen3-coder-next 80B-A3B (70.6% SWE-bench, MoE) |
|
| $0.010 | Vision+text via qwen3.8:27b |
|
| $0.0001 | Embeddings via nomic-embed-text |
KYA / Agent Identity (2)
Tool | Endpoint | Paid price | Description |
|
| $0.01 | Issue ERC-8004-style agent passport (signed JSON credential) |
|
| $0.005 | Verify a signed agent passport (valid/invalid + issuer + age) |
B2B Enrichment (2)
Tool | Endpoint | Paid price | Description |
|
| $0.05 | Company enrichment via SEC EDGAR + Wikipedia |
|
| $0.01 | Email deliverability (DNS MX + SMTP banner + disposable check) |
Web / Discovery (2)
Tool | Endpoint | Paid price | Description |
|
| $0.005 | Web search via DuckDuckGo instant-answer |
|
| $0.005 | Search 28K x402 services by keyword |
Security (11)
Tool | Endpoint | Paid price | Description |
|
| $0.001 | URL safety (typosquatting, suspicious TLDs, punycode, shorteners) |
|
| $0.05 | Smart contract risk grade (A-F) via Base RPC + DefiLlama |
|
| $0.05 | Scan wallet for risky ERC-20 approvals |
|
| $0.01 | Token safety (mint fn, honeypot patterns, owner privileges) |
|
| $0.005 | Label lookup (exchanges, bridges, MEV bots, famous wallets) |
|
| $0.05 | Address reputation score 0-1000 (age, balance, activity, sanctions) |
|
| $0.001 | Recent hack/exploit feed from DefiLlama |
|
| $0.001 | Resolve ENS name -> address |
|
| $0.10 | Full wallet security audit (ENS + label + approvals + grade) |
|
| $0.001 | Reverse ENS: address -> name |
|
| $0.01 | Recent transactions for any address |
Data Utilities (8)
Tool | Endpoint | Paid price | Description |
|
| $0.0001 | Real-time crypto prices (CoinGecko) |
|
| $0.001 | Real-time gas (gwei) + block number |
|
| $0.001 | ERC-20 token balance lookup |
|
| $0.0001 | Weather forecast (Open-Meteo) |
|
| $0.0001 | IP geolocation (ipapi.co) |
|
| $0.0001 | Currency exchange rates (exchangerate.host) |
|
| $0.0002 | Domain WHOIS |
|
| $0.005 | DeFi yield scanner across 17K pools (DeFiLlama) |
Related MCP server: x402tools MCP Server
Install
pip install mcp
# CDP creds are OPTIONAL — only required if you pass `paid: true` on any call.
# Without them, every call goes to the free mirror (30/min/IP).
export CDP_API_KEY_ID=...
export CDP_API_KEY_SECRET=...
export CDP_WALLET_SECRET=...
# Paying wallet (defaults to NEX treasury 0x28F3D3fb24D4926BF5C35296c822d2a43D181177)
export NEX_WALLET=0x28F3D3fb24D4926BF5C35296c822d2a43D181177
# NEX x402 base URL (defaults to live Cloudflare tunnel)
export NEX_BASE_URL=https://lots-dave-morgan-sized.trycloudflare.comRun
python server.pyUse 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": "..."
}
}
}
}CDP creds are optional — omit them if you only need the free mirror.
Example calls
Free (default, no payment):
{ "name": "nex_crypto_price", "arguments": { "symbol": "BTC,ETH" } }Paid (x402 USDC on Base):
{ "name": "nex_crypto_price", "arguments": { "symbol": "BTC,ETH", "paid": true } }Multi-param (yield scanner):
{ "name": "nex_yield_scanner", "arguments": { "chain": "base", "stable": true, "min_tvl": 5000000, "min_apy": 5, "max": 10 } }Chat (OpenAI-compatible):
{ "name": "nex_chat_compat", "arguments": { "messages": [{"role": "user", "content": "Hello"}] } }Response envelope
Every call returns a JSON envelope so callers know what they hit:
{
"paid": false,
"tier": "free",
"path": "/v1/free/crypto-price",
"price_usdc": 0.0,
"result": { "...": "endpoint payload" }
}For paid calls:
{
"paid": true,
"tier": "paid",
"path": "/v1/crypto-price",
"price_usdc": 0.0001,
"wallet": "0x28F3D3fb24D4926BF5C35296c822d2a43D181177",
"result": { "...": "endpoint payload" }
}How payment works (when paid: true)
Server hits the NEX x402 endpoint, gets a
402 Payment Requiredwith EIP-3009 payment spec.Server signs
transferWithAuthorization(gasless, EIP-712 typed data) for the tier's price in USDC.Server retries with the
X-PAYMENT: <base64url>header.Facilitator (PayAI / CDP) settles on-chain; NEX returns the response.
The user's wallet pays USDC directly to NEX treasury
0x28F3D3fb24D4926BF5C35296c822d2a43D181177. No middleman custody.
For the default free path, steps 1-4 collapse to a plain HTTP POST against /v1/free/<endpoint>.
Discovery
The upstream NEX x402 manifest is at:
https://lots-dave-morgan-sized.trycloudflare.com/.well-known/x402.jsonBacked 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
Plus 24 external data/security/web tools (SEC EDGAR, CoinGecko, Open-Meteo, DeFiLlama, ipapi.co, exchangerate.host, Base RPC, ENS, DuckDuckGo, …)
No data leaves the machine for inference. USDC on Base settles per call.
More
NEX x402 manifest: https://lots-dave-morgan-sized.trycloudflare.com/.well-known/x402.json
Listed in: https://github.com/xpaysh/awesome-x402 (PR #1381)
Treasury:
0x28F3D3fb24D4926BF5C35296c822d2a43D181177
Tool Schema Changelog
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