OpenSolar MCP vs GroundTruth MCP
A side-by-side look at the OpenSolar MCP and GroundTruth MCP MCP servers: transport, auth, tools, quality signals, and the config to install either one in Claude, Cursor, Windsurf or VS Code.
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OpenSolar MCPDeveloper Tools · Local subprocess (stdio)Unofficial, self-hosted MCP server for the documented OpenSolar API.41FairAuth: api key requiredVerdict: choose OpenSolar MCP for developer tools work as a local process; choose GroundTruth MCP for developer tools as a local process. You can also run both side by side in one mcpServers block.
Which MCP server should you choose?
OChoose OpenSolar MCP when
- You need dedicated capabilities in the Developer Tools domain.
- You prefer a local stdio subprocess transport.
- Its auth model fits you: API key required.
- You have the keys it needs:
OPENSOLAR_API_TOKEN, OPENSOLAR_ORG_ID.
Choose GroundTruth MCP when
- You need dedicated capabilities in the Developer Tools domain.
- You prefer a local stdio subprocess transport.
- Its auth model fits you: No auth required.
- You have the keys it needs:
GT_GITHUB_TOKEN.
Feature & specification comparison
Rows where the two servers differ are marked.
| Spec | O OpenSolar MCP | |
|---|---|---|
| Category | Developer Tools | Developer Tools |
| Quality signal | 41/100 · Fair | 56/100 · Good |
| Install command | Confirmed | Confirmed |
| Transport | Local subprocess (stdio) | Local subprocess (stdio) |
| Auth | API key required | No auth required |
| Pricing | BYOK (pay the provider) | Free |
| Required env vars | OPENSOLAR_API_TOKENOPENSOLAR_ORG_ID | GT_GITHUB_TOKEN |
| Verified owner | Community listing | Community listing |
| GitHub stars | 0 | 6 |
| Directory activity | 0 views 0 installs 0 upvotes | 3 views 0 installs 0 upvotes |
| Tools | Not listed | Not listed |
| Full listing | View OpenSolar MCP | View GroundTruth MCP |
Tools & capabilities
OpenSolar MCP tools
No tool names declared yet. Check the project README from the listing page.
GroundTruth MCP tools
No tool names declared yet. Check the project README from the listing page.
Ready-to-paste client configs
Paste either block (or both) into your client config, e.g. claude_desktop_config.json or ~/.cursor/mcp.json. We only show a config when the install command is confirmed.
OpenSolar MCP
{
"mcpServers": {
"opensolar-mcp": {
"command": "npx",
"args": [
"-y",
"@alignco/opensolar-mcp"
],
"env": {
"OPENSOLAR_API_TOKEN": "YOUR_OPENSOLAR_API_TOKEN_HERE",
"OPENSOLAR_ORG_ID": "YOUR_OPENSOLAR_ORG_ID_HERE"
}
}
}
}
GroundTruth MCP
{
"mcpServers": {
"rm-rf-prod-groundtruth-mcp": {
"command": "npx",
"args": [
"-y",
"@groundtruth-mcp/gt-mcp@latest"
],
"env": {
"GT_GITHUB_TOKEN": "YOUR_GT_GITHUB_TOKEN_HERE"
}
}
}
}
Frequently asked questions
OpenSolar MCP is categorized under Developer Tools and uses a local stdio subprocess. GroundTruth MCP belongs to Developer Tools and uses a local stdio subprocess. Pick OpenSolar MCP for developer tools work and GroundTruth MCP for developer tools.
Copy the mcpServers block from the config section on this page into your client's config (for example claude_desktop_config.json or ~/.cursor/mcp.json), then fully restart the client.
OpenSolar MCP is bring-your-own-key: usage is billed by the API provider you supply a key for. Auth: api key required. GroundTruth MCP is listed as free. Auth: no auth required. If a server needs environment variables such as API keys, define them under the env key in your client's MCP config.
Yes. MCP clients support multiple servers: add opensolar-mcp and rm-rf-prod-groundtruth-mcp as separate keys in the same mcpServers object, and your assistant will call tools from either one.
On AllMCPs, OpenSolar MCP has a quality signal of 41/100 (Fair) with 0 views, 0 installs and 0 GitHub stars. GroundTruth MCP has 56/100 (Good) with 3 views, 0 installs and 6 GitHub stars.