feat: Add complete JLCPCB API integration with dual-mode support
Implements full JLCPCB parts catalog integration alongside existing local library search, giving users two complementary approaches for component selection: 1. Local Symbol Libraries (PR #25) - Search JLCPCB libraries installed via KiCad PCM - Pre-configured symbols with footprints - Works offline, no API needed 2. JLCPCB API Integration (NEW) - Complete 100k+ parts catalog access - Real-time pricing and stock information - Basic/Extended library type identification - Cost optimization and alternative suggestions - Package-to-footprint mapping New Features: - download_jlcpcb_database: Download complete parts catalog to local SQLite DB - search_jlcpcb_parts: Parametric search with pricing, stock, library type filters - get_jlcpcb_part: Detailed part info with price breaks and footprint suggestions - get_jlcpcb_database_stats: Database statistics and status - suggest_jlcpcb_alternatives: Find cheaper/available alternatives Implementation: - Python API client (commands/jlcpcb.py) - JLCPCB API authentication and data fetching - Parts database manager (commands/jlcpcb_parts.py) - SQLite storage and search - TypeScript MCP tools (tools/jlcpcb-api.ts) - User-facing tool definitions - Comprehensive documentation (docs/JLCPCB_USAGE_GUIDE.md) Database Features: - ~100k parts with descriptions, pricing, stock levels - Full-text search on descriptions and part numbers - Parametric filtering (category, package, manufacturer, library type) - Package-to-footprint mapping for KiCad - Intelligent alternative suggestions Setup Requirements: - JLCPCB_API_KEY and JLCPCB_API_SECRET environment variables - One-time database download (~5-10 minutes, 42MB) - requests library (already in requirements.txt) Benefits: - Cost optimization (identify Basic parts = free assembly) - Real-time stock checking - Complete catalog access - Works offline after initial download - Complements local library search 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
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KiCAD MCP Bot
247
python/commands/jlcpcb.py
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247
python/commands/jlcpcb.py
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"""
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JLCPCB API client for fetching parts data
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Handles authentication and downloading the JLCPCB parts library
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for integration with KiCAD component selection.
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"""
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import os
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import logging
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import requests
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import time
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from typing import Optional, Dict, List, Callable
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from pathlib import Path
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logger = logging.getLogger('kicad_interface')
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class JLCPCBClient:
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"""
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Client for JLCPCB API
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Handles authentication and fetching the complete parts library
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from JLCPCB's external API.
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"""
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BASE_URL = "https://jlcpcb.com/external"
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def __init__(self, api_key: Optional[str] = None, api_secret: Optional[str] = None):
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"""
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Initialize JLCPCB API client
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Args:
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api_key: JLCPCB API key (or reads from JLCPCB_API_KEY env var)
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api_secret: JLCPCB API secret (or reads from JLCPCB_API_SECRET env var)
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"""
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self.api_key = api_key or os.getenv('JLCPCB_API_KEY')
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self.api_secret = api_secret or os.getenv('JLCPCB_API_SECRET')
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self.token = None
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self.token_expiry = 0
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if not self.api_key or not self.api_secret:
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logger.warning("JLCPCB API credentials not found. Set JLCPCB_API_KEY and JLCPCB_API_SECRET environment variables.")
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def authenticate(self) -> str:
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"""
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Get authentication token from JLCPCB API
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Returns:
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Authentication token
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Raises:
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Exception if authentication fails
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"""
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if not self.api_key or not self.api_secret:
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raise Exception("JLCPCB API credentials not configured. Please set JLCPCB_API_KEY and JLCPCB_API_SECRET environment variables.")
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# Check if we have a valid token
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if self.token and time.time() < self.token_expiry:
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return self.token
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logger.info("Authenticating with JLCPCB API...")
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try:
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response = requests.post(
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f"{self.BASE_URL}/genToken",
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json={
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"appKey": self.api_key,
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"appSecret": self.api_secret
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},
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timeout=30
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)
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response.raise_for_status()
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data = response.json()
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if data.get('code') != 200:
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raise Exception(f"Authentication failed: {data.get('msg', 'Unknown error')}")
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self.token = data['data']['token']
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# Tokens typically expire after 2 hours, we'll refresh after 1.5 hours to be safe
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self.token_expiry = time.time() + (90 * 60)
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logger.info("Successfully authenticated with JLCPCB API")
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return self.token
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except requests.exceptions.RequestException as e:
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logger.error(f"Failed to authenticate with JLCPCB API: {e}")
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raise Exception(f"JLCPCB API authentication failed: {e}")
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def fetch_parts_page(self, last_key: Optional[str] = None) -> Dict:
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"""
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Fetch one page of parts from JLCPCB API
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Args:
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last_key: Pagination key from previous response (None for first page)
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Returns:
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Response dict with parts data and pagination info
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"""
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token = self.authenticate()
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headers = {
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"externalApiToken": token
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}
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payload = {}
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if last_key:
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payload["lastKey"] = last_key
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try:
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response = requests.post(
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f"{self.BASE_URL}/component/getComponentInfos",
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headers=headers,
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json=payload,
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timeout=60
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)
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response.raise_for_status()
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data = response.json()
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if data.get('code') != 200:
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raise Exception(f"API request failed: {data.get('msg', 'Unknown error')}")
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return data['data']
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except requests.exceptions.RequestException as e:
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logger.error(f"Failed to fetch parts page: {e}")
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raise Exception(f"JLCPCB API request failed: {e}")
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def download_full_database(
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self,
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callback: Optional[Callable[[int, int, str], None]] = None
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) -> List[Dict]:
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"""
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Download entire parts library from JLCPCB
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Args:
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callback: Optional progress callback function(current_page, total_parts, status_msg)
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Returns:
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List of all parts
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"""
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all_parts = []
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last_key = None
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page = 0
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logger.info("Starting full JLCPCB parts database download...")
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while True:
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page += 1
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try:
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data = self.fetch_parts_page(last_key)
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parts = data.get('componentInfos', [])
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all_parts.extend(parts)
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last_key = data.get('lastKey')
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if callback:
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callback(page, len(all_parts), f"Downloaded {len(all_parts)} parts...")
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else:
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logger.info(f"Page {page}: Downloaded {len(all_parts)} parts so far...")
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# Check if there are more pages
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if not last_key or len(parts) == 0:
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break
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# Rate limiting - be nice to the API
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time.sleep(0.5)
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except Exception as e:
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logger.error(f"Error downloading parts at page {page}: {e}")
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if len(all_parts) > 0:
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logger.warning(f"Partial download available: {len(all_parts)} parts")
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return all_parts
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else:
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raise
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logger.info(f"Download complete: {len(all_parts)} parts retrieved")
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return all_parts
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def get_part_by_lcsc(self, lcsc_number: str) -> Optional[Dict]:
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"""
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Get detailed information for a specific LCSC part number
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Note: This uses the same endpoint as fetching parts, as JLCPCB doesn't
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have a dedicated single-part endpoint. In practice, you should use
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the local database after initial download.
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Args:
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lcsc_number: LCSC part number (e.g., "C25804")
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Returns:
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Part info dict or None if not found
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"""
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# For now, this would require searching through pages
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# In practice, you'd use the local database
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logger.warning("get_part_by_lcsc should use local database, not API")
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return None
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def test_jlcpcb_connection(api_key: Optional[str] = None, api_secret: Optional[str] = None) -> bool:
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"""
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Test JLCPCB API connection
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Args:
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api_key: Optional API key (uses env var if not provided)
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api_secret: Optional API secret (uses env var if not provided)
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Returns:
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True if connection successful, False otherwise
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"""
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try:
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client = JLCPCBClient(api_key, api_secret)
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token = client.authenticate()
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logger.info("JLCPCB API connection test successful")
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return True
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except Exception as e:
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logger.error(f"JLCPCB API connection test failed: {e}")
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return False
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if __name__ == '__main__':
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# Test the JLCPCB client
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logging.basicConfig(level=logging.INFO)
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print("Testing JLCPCB API connection...")
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if test_jlcpcb_connection():
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print("✓ Connection successful!")
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client = JLCPCBClient()
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print("\nFetching first page of parts...")
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data = client.fetch_parts_page()
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parts = data.get('componentInfos', [])
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print(f"✓ Retrieved {len(parts)} parts in first page")
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if parts:
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print(f"\nExample part:")
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part = parts[0]
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print(f" LCSC: {part.get('componentCode')}")
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print(f" MFR Part: {part.get('componentModelEn')}")
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print(f" Category: {part.get('firstSortName')} / {part.get('secondSortName')}")
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print(f" Package: {part.get('componentSpecificationEn')}")
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print(f" Stock: {part.get('stockCount')}")
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else:
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print("✗ Connection failed. Check your API credentials.")
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