Demo Deploying MCP Server KMCP Way Part 2

kmcp add tool crypto_price /root/crypto-price-mcp

# /root/crypto-price-mcp/src/tools/crypto_price.py
"""Crypto price tool for MCP server.
"""

from core.server import mcp
from core.utils import get_tool_config

@mcp.tool()
def crypto_price(message: str) -> str:
    """Crypto_price tool implementation.

    This is a template function. Replace this implementation with your tool logic.
    """
    # Get tool-specific configuration from kmcp.yaml
    config = get_tool_config("crypto_price")

    # Basic example implementation — replace with actual logic
    prefix = config.get("prefix", "echo: ")
    return f"{prefix}{message}"

# /root/crypto-price-mcp/src/tools/crypto_price.py
"""Crypto price tool for MCP server.
"""

import requests
from core.server import mcp
from core.utils import get_tool_config

@mcp.tool()
def get_crypto_price(symbol: str = "bitcoin", currency: str = "usd") -> dict:
    """Fetch the current live price for a cryptocurrency.

    Args:
        symbol: Cryptocurrency ID as used by CoinGecko (e.g., 'bitcoin', 'ethereum', 'cardano').
        currency: Target currency (e.g., 'usd', 'eur', 'gbp', 'aud').

    Returns:
        dict: On success, returns:
            {
                "symbol": "<symbol>",
                "currency": "<CURRENCY>",  # uppercased
                "price": <numeric_price>
            }
        On failure, returns:
            { "error": "<error message>" }
    """
    # Normalize inputs
    symbol = (symbol or "bitcoin").strip().lower()
    currency = (currency or "usd").strip().lower()

    # Allow overriding URL via kmcp.yaml tool config
    config = get_tool_config("crypto_price")
    base_url = config.get("coingecko_url", "https://api.coingecko.com/api/v3/simple/price")

    url = f"{base_url}?ids={symbol}&vs_currencies={currency}"

    try:
        resp = requests.get(url, timeout=10)
        resp.raise_for_status()

        data = resp.json()
        price = data.get(symbol, {}).get(currency)

        if price is None:
            return {"error": f"No price data found for '{symbol}' in '{currency}'"}

        return {
            "symbol": symbol,
            "currency": currency.upper(),
            "price": price,
        }
    except requests.exceptions.Timeout:
        return {"error": "Request timed out. Please try again."}
    except requests.exceptions.RequestException as e:
        return {"error": f"Request failed: {str(e)}"}
    except Exception as e:
        return {"error": f"Unexpected error: {str(e)}"}

cp /root/crypto_price.py /root/crypto-price-mcp/src/tools/crypto_price.py

⚙️ Proxy server listening on 127.0.0.1:6277
🔑 Session token: 0be785d11375863681ffb7f833b31887ce1a75ae37920bc62f438343214b8b0e
🔍 MCP Inspector is up and running at http://127.0.0.1:6274 🚀

{
  "symbol": "bitcoin",
  "currency": "USD",
  "price": 87742
}

kmcp build --project-dir /root/crypto-price-mcp \
  -t kodekloud/kmcp-server:bitcoin \
  --platform linux/amd64

#24 exporting to image
#24 writing image sha256:1df91f67cb9a... done
#24 naming to docker.io/kodekloud/kmcp-server:bitcoin done
✓ Successfully built Docker image: kodekloud/kmcp-server:bitcoin

apiVersion: kagent.dev/v1alpha2
kind: Agent
metadata:
  name: crypto-price-agent
  namespace: kagent
spec:
  declarative:
    modelConfig: default-model-config
    stream: true
    systemMessage: |-
      You're a helpful agent, made by the kagent team.

      # Instructions
      - If user question is unclear, ask for clarification before running any tools
      - Always be helpful and friendly
      - If you don't know how to answer the question DO NOT make things up, tell the user "Sorry, I don't know how to answer that" and ask them to clarify the question further
      - If you are unable to help, or something goes wrong, refer the user to https://kagent.dev for more information or support.

      # Response format:
      - ALWAYS format your response as Markdown
      - Your response will include a summary of actions you took and an explanation of the result

      - If you created any artifacts such as files or resources, you will include those in your response as well
    tools:
      - mcpServer:
          apiGroup: kagent.dev
          kind: MCPServer
          name: crypto-price-mcp
          toolNames:
            - echo
            - get_crypto_price
          type: McpServer
description: crypto price agent
type: Declarative

kubectl get agent -n kagent

NAME               TYPE         READY   ACCEPTED
crypto-price-agent Declarative  True    True