Add Agent Hub MCP server - crypto-native AI services

src/agent-hub/index.json

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+{
+  "name": "agent-hub",
+  "displayName": "Agent Hub",
+  "description": "Crypto-native AI services with USDC payments on Base Mainnet",
+  "longDescription": "Access 18 premium AI services including sentiment analysis, translation, research, web scraping, data extraction, content generation, code review, and more. All services accept USDC cryptocurrency payments on Base Mainnet with no subscriptions required.",
+  "repository": "https://github.com/SVG-campus/agent-hub",
+  "homepage": "https://web-production-4833.up.railway.app",
+  "categories": ["ai", "web3", "data", "content"],
+  "tags": ["crypto", "usdc", "base", "payment", "sentiment", "translation", "research", "scraping"],
+  "author": {
+    "name": "SVG-campus",
+    "url": "https://github.com/SVG-campus"
+  },
+  "license": "MIT",
+  "versions": {
+    "latest": "1.0.0"
+  }
+}

src/agent-hub/server/agent_hub_mcp.py

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+from mcp.server import Server
+from mcp.types import Tool, TextContent
+import httpx
+
+app = Server("agent-hub")
+BASE_URL = "https://web-production-4833.up.railway.app"
+
+@app.list_tools()
+async def list_tools():
+    return [
+        Tool(
+            name="sentiment_analysis",
+            description="Analyze sentiment ($0.05 USDC)",
+            inputSchema={
+                "type": "object",
+                "properties": {
+                    "text": {"type": "string"},
+                    "payment_tx": {"type": "string"}
+                },
+                "required": ["text"]
+            }
+        ),
+        Tool(
+            name="translate",
+            description="Translate text ($0.05 USDC)",
+            inputSchema={
+                "type": "object",
+                "properties": {
+                    "text": {"type": "string"},
+                    "target_language": {"type": "string"},
+                    "payment_tx": {"type": "string"}
+                },
+                "required": ["text", "target_language"]
+            }
+        ),
+        Tool(
+            name="web_research",
+            description="Research with sources ($0.30 USDC)",
+            inputSchema={
+                "type": "object",
+                "properties": {
+                    "query": {"type": "string"},
+                    "payment_tx": {"type": "string"}
+                },
+                "required": ["query"]
+            }
+        )
+    ]
+
+@app.call_tool()
+async def call_tool(name, arguments):
+    headers = {}
+    if "payment_tx" in arguments:
+        headers["PAYMENT-SIGNATURE"] = arguments.pop("payment_tx")
+
+    endpoint_map = {
+        "sentiment_analysis": "/agent/sentiment",
+        "translate": "/agent/translate",
+        "web_research": "/agent/research"
+    }
+
+    async with httpx.AsyncClient() as client:
+        response = await client.post(
+            f"{BASE_URL}{endpoint_map[name]}",
+            json=arguments,
+            headers=headers
+        )
+        return [TextContent(type="text", text=response.text)]

src/agent-hub/v1.0.0.json

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+{
+  "version": "1.0.0",
+  "runtime": "python",
+  "install": {
+    "pip": "pip install mcp httpx"
+  },
+  "config": {
+    "command": "python",
+    "args": ["-m", "agent_hub_mcp"]
+  },
+  "capabilities": [
+    "sentiment_analysis",
+    "translation",
+    "web_research",
+    "web_scraping",
+    "data_extraction",
+    "content_generation",
+    "code_review"
+  ],
+  "pricing": {
+    "model": "pay-per-use",
+    "currency": "USDC",
+    "network": "Base Mainnet",
+    "range": "$0.05 - $2.00 per service"
+  }
+}