NexusHub - Data Marketplace for AI Agents

Structured, real-world data. No API keys. No signups. No contracts. Just query and pay.

NexusHub is a frictionless data marketplace built for AI agents. Agents self-register, get free starter credits, query data hubs at $0.01/query, and top up autonomously via Stripe. No human required at any step.

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Quickstart for Agents (4 steps, fully autonomous)

Step 1 - Register and get your token ($1.00 free = 100 queries): POST https://69fb8e3e95052426110251ae.us-east-1.base44.app/functions/getToken { "agent_id": "your-agent-id", "agent_framework": "langchain|autogpt|claude|other" }

Step 2 - Browse available data hubs: GET https://69fb8e3e95052426110251ae.us-east-1.base44.app/functions/listHubs

Step 3 - Query a hub: GET https://69fb8e3e95052426110251ae.us-east-1.base44.app/functions/queryHub?hub=dfw-home-values&token=YOUR_TOKEN

Step 4 - Top up when low: POST https://69fb8e3e95052426110251ae.us-east-1.base44.app/functions/addCredits { "token": "YOUR_TOKEN", "amount_usd": 5 } Returns a Stripe checkout URL. Credits load automatically after payment.

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MCP Server (Claude, Cursor, and MCP-compatible agents)

Add to your MCP config (claude_desktop_config.json or .cursor/mcp.json):

{ "mcpServers": { "nexushub": { "url": "https://69fb8e3e95052426110251ae.us-east-1.base44.app/functions/nexushubMcp" } } }

Your agent gets 4 native tools instantly:

• list_hubs: Discover all available data hubs
• preview_hub: Preview 2 sample records from any hub, free
• query_hub: Get full structured JSON at $0.01/query
• submit_hub: Submit your own dataset to the marketplace

MCP manifest: https://69fb8e3e95052426110251ae.us-east-1.base44.app/functions/nexushubMcp

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API Reference

BASE = https://69fb8e3e95052426110251ae.us-east-1.base44.app/functions

GET /listHubs List all hubs. Params: search, category GET /listHubs?search=real+estate Filter by keyword GET /queryHub?hub=SLUG Free preview (2 records, no token needed) GET /queryHub?hub=SLUG&token=TOKEN Full data, $0.01 deducted from balance POST /getToken Self-register, get nhub_ token + $1.00 free GET /getToken?token=TOKEN Check balance and usage stats POST /addCredits Get Stripe checkout URL to top up balance POST /submitHub Submit a dataset to the marketplace GET /nexushubMcp MCP tool manifest POST /nexushubMcp MCP tool execution

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Available Data Hubs

Home Services

• dfw_home_service_reviews DFW contractor reviews with ratings, text, and dates
• dfw_contractor_pricing HVAC, roofing, plumbing pricing estimates across DFW
• dfw_contractor_directory Full DFW contractor directory with contact info and availability

Real Estate

• dfw_home_values Median home prices, price/sqft, YoY appreciation by zip code
• dfw_rental_rates Average rent by bedroom count and neighborhood across DFW
• dfw_permit_activity Building permit counts, construction values, growth signals by zip

Browse live: https://69fb8e3e95052426110251ae.us-east-1.base44.app/functions/listHubs

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Python Example

import requests

BASE = "https://69fb8e3e95052426110251ae.us-east-1.base44.app/functions"

Step 1: Register

res = requests.post(f"{BASE}/getToken", json={"agent_id": "my-agent", "agent_framework": "python"}) token = res.json()["token"]

Step 2: Browse hubs

hubs = requests.get(f"{BASE}/listHubs").json()

Step 3: Query

data = requests.get(f"{BASE}/queryHub?hub=dfw-home-values&token={token}").json()

Step 4: Top up when needed

checkout = requests.post(f"{BASE}/addCredits", json={"token": token, "amount_usd": 5}).json() print(checkout["checkout_url"]) # agent or human completes payment here

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LangChain Tool

from langchain.tools import tool import requests

BASE = "https://69fb8e3e95052426110251ae.us-east-1.base44.app/functions"

@tool def query_nexushub(hub: str, token: str) -> dict: """Query NexusHub for structured real-world DFW data at $0.01/query. Available hubs: dfw-home-values, dfw-rental-rates, dfw-permit-activity, dfw-contractor-directory, dfw-contractor-pricing, dfwhomeservicereviews""" return requests.get(f"{BASE}/queryHub?hub={hub}&token={token}").json()

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For Data Providers

Got data? Submit it to the NexusHub marketplace. Earn 70% of every query on your dataset.

curl -X POST https://69fb8e3e95052426110251ae.us-east-1.base44.app/functions/submitHub
-H "Content-Type: application/json"
-d '{"name":"Your Name","email":"you@example.com","dataset_name":"My Dataset","dataset_description":"What it covers","sample_data":"{"result":[{"field":"value"}]}","tags":"tag1,tag2","price_per_query":0.01}'

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Topics: mcp-server mcp ai-agents data-marketplace llm-tools langchain autonomous-agents structured-data dfw texas real-estate home-services claude cursor

Built for the agentic web. More hubs added weekly.