Side-by-Side Model Context Protocol Comparison
Lotw MCP vs Solar MCP
In-depth architectural comparison of the Lotw MCP and Solar MCP MCP servers. Compare execution transports, security boundaries, tool capabilities, quality scores, and ready-to-paste client installation snippets for Claude, Cursor, Windsurf, and VS Code.
At a Glance & Executive Verdict
Lotw MCP
Developer Tools · Local stdio
Quality: 47/100 (Fair) | Auth: No auth required
Solar MCP
Developer Tools · Local stdio
Quality: 52/100 (Good) | Auth: No auth required
Verdict Summary: Choose Lotw MCP if you need specialized Developer Tools tools running via a local process. Choose Solar MCP if your workspace requires Developer Tools integration with local subprocess execution. Both servers can be configured concurrently in your client's
mcpServers manifest.Which MCP Server Should You Choose?
L
Choose Lotw MCP when:
- You need dedicated capabilities in the Developer Tools domain.
- You prefer local stdio subprocess transport architecture.
- Your security boundary fits: No auth required (Free / Open Source).
- Primary tools included: lotw_confirmations, lotw_qsos, lotw_dxcc_credits.
S
Choose Solar MCP when:
- You need dedicated capabilities in the Developer Tools domain.
- You prefer local stdio subprocess transport architecture.
- Your security boundary fits: No auth required (Free / Open Source).
- Primary tools included: solar_conditions, solar_forecast, solar_alerts.
Feature & Specification Comparison
Tools & Capabilities Breakdown
Lotw MCP Tools (6)
lotw_confirmations
Query confirmed QSLs with band/mode/call/date filters
lotw_qsos
Query all uploaded QSOs (confirmed and unconfirmed)
lotw_dxcc_credits
DXCC award credits from LoTW confirmations
lotw_download
Download QSOs as ADIF file
lotw_user_activity
Check if a callsign uses LoTW and when they last uploaded
get_version_info
Service version + upstream LoTW schema version (fleet identity attestation)
Ready-to-Paste Client Configurations
Paste either (or both) of these JSON server blocks into your client config file (e.g. claude_desktop_config.json or ~/.cursor/mcp.json).
Lotw MCP Configuration
Solar MCP Configuration