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Abandoned & failing MCP servers to avoid
A defensive-security watchlist of MCP projects that scored a failing grade, were archived by their maintainers, or have gone many months without a commit. Connecting an abandoned server to an autonomous agent is a real risk - these entries failed CheckMCP's audit on maintenance, security, or both. Review before you trust them.
15 servers, ranked by independent MCP Score. Click any to see its full security & quality audit.
| 01 | -DEPRECATED-mcp openfort-xyz/mcp | ◆ repo★ 3 | 3F |
| 02 | mcp-database-server fireproof-storage/mcp-database-server | ◆ repo★ 31 | 19F |
| 03 | mcp prisma/mcp | ◆ repo★ 47 | 22F |
| 04 | discordmcp v-3/discordmcp | ◆ repo★ 226 | 24F |
| 05 | honeycomb-mcp honeycombio/honeycomb-mcp | ◆ repo★ 43 | 38F |
| 06 | mcp-tinybird tinybirdco/mcp-tinybird | ◆ repo★ 79 | 39F |
| 07 | agentkit chargebee/agentkit | ◆ repo★ 15 | 42F |
| 08 | mcp-server-axiom axiomhq/mcp-server-axiom | ◆ repo★ 60 | 42F |
| 09 | mcp-server-box box-community/mcp-server-box | ◆ repo★ 101 | 43F |
| 10 | mcp-audiense-insights AudienseCo/mcp-audiense-insights | ◆ repo★ 19 | 46F |
| 11 | railway-mcp-server railwayapp/railway-mcp-server | ◆ repo★ 192 | 47F |
| 12 | mcp-server e2b-dev/mcp-server | ◆ repo★ 394 | 51F |
| 13 | mcp semgrep/mcp | ◆ repo★ 684 | 54F |
| 14 | azure-mcp Azure/azure-mcp | ◆ repo★ 1.2k | 54F |
| 15 | Broker as a Service chainflip-broker.io | ● live6 tools | 69D |
Abandoned & failing MCP servers to avoid — FAQ
How are these MCP servers ranked?+
Every server on this page is independently audited by CheckMCP and scored 0–100 across weighted pillars — for live endpoints: security (OWASP MCP Top 10), tool design, schemas, reliability and context-cost; for repos: maintenance, license, adoption and documentation. Ordering reflects the audit (popularity lists are ordered by GitHub stars instead) — no vendor pays for placement.
Which of these MCP servers are abandoned or failing?+
15 of the 15 servers audited on this page carry a failing grade (D or F) — Broker as a Service scores lowest at 69/100 (grade D). CheckMCP re-audits continuously, so a server that stops shipping fixes, loses its license or gets archived drops here on its own. Popularity is not health: the most-starred entry here (azure-mcp, ★ 1.2k) scores 54/100, not the top score. Open any listing for the per-pillar breakdown behind its grade.
Are these MCP servers safe to use?+
Each listing links to a full CheckMCP report showing its grade, per-pillar breakdown and any security findings (tool poisoning, hardcoded secrets, the lethal trifecta). Grade A/B servers passed with no or only minor issues; check the individual report before connecting any server to sensitive data or tools.