ProtocolProbe vs PlugMCP
A side-by-side comparison built from both listings. Blank cells mean the company has not given that detail; we never guess.
ProtocolProbe compared with PlugMCP
| Detail | 
ProtocolProbe | 
PlugMCP |
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| What it does | Free directory of MCP server facts with checked information from public records
| MCP server directory and hosting platform for agents
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| Stage | Not given
| Not given
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| Founded | Not given
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| Based in | Not given
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| Pricing model | Free
| Freemium
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| Pricing | Not given
| Free: 2 servers, 1,000 calls a month. Starter: $29/month, 3 hosted servers, 10,000 calls a month. Pro: $59/month, 10 hosted servers, 50,000 calls a month. Advanced: $99/month, 30 hosted servers, 200,000 calls a month. All paid plans include 7-day free trial.
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| Key features | - Free JSON API with no authentication required
- Server search and filtering by name and description
- Rankings by downloads, stars and record checks
- Server comparison and topic filtering
- Self-test command for your own server
- Record checks with badge for README
- Corrections log tracking fact updates
- CC BY 4.0 licensed data export
- Change tracking for registry updates
- Allowlist export for company filtering
| - Ranked results with health signals and install configs
- Call logs showing tool name, search words, timing and daily totals
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| What makes it different | - Scheduled re-checking of all facts on a regular basis, unlike the official registry which only checks on publication
- Every fact shown with its source and the date checked
- No ads, sponsors or paid placements; income never changes listings or rankings
- Corrections publicly logged and requests always answered with reasoning
- Open API accessible to everyone without authentication key
| - Integrates directly into agents (Claude, Cursor, VS Code, Windsurf, ChatGPT, Grok) as single MCP endpoint
- Directory seeded from official MCP Registry and GitHub curated collections
- Hosts MCP servers on gateway with keys, call logs and no per-seat charges
- Keys stay hashed in database, shown once only, never stored plaintext
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| Free plan | Not given
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| Open source | Not given
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| Platforms | Not given
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| Public API | Not given
| Not given
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| Community votes | 0 | 0 |
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| DR (Domain Rating by Ahrefs) | Not checked yet ● no change since last check | Not checked yet ● no change since last check |
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| Trust Flow (Majestic) | 3 | 0 |
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| Citation Flow (Majestic) | 22 | 15 |
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| Referring domains (Majestic) | 7 | 2 |
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4 details filled in for both companies.
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