Postgres (legacy reference)
Last tested 2026-10-22
Score 70/100 · Last tested 2026-10-22 · Version tested 0.6.2 · Package @modelcontextprotocol/server-postgres · Repo modelcontextprotocol/servers-archived
Summary: Postgres (legacy reference) completed an MCP handshake without credentials and exposed 1 tools; it is deprecated or archived, so prefer a maintained alternative.
Test results
| Test | Result | Points | Evidence |
|---|---|---|---|
| install | pass | 20 | npm install @modelcontextprotocol/server-postgres (Node 20, Linux) succeeded in 1s. |
| handshake | pass | 30 | MCP initialize + tools/list over stdio succeeded with no credentials; 1 tools listed in 2.5s. |
| maintenance | fail | 0 | Deprecated on npm: Package no longer supported. Contact Support at https://www.npmjs.com/support for more info.; GitHub repo modelcontextprotocol/servers-archived is archived. |
| docs | partial | 10 | install instructions present; mcpServers config example present. Automated check of the package's own README (README shipped in npm package). |
| license | pass | 10 | MIT (OSI-approved). |
Local-model readiness
Schema context cost: ~32 tokens for 1 tools (131 bytes) · about 0% of an 8k context. Method: tiktoken cl100k_base over compact JSON of name+description+inputSchema (approximate).
Small-model friendly (schema heuristic, not a model result): high.
Small-model task runs: Not yet tested.
Functional tasks (1/1 passed, tested 2026-10-22)
| Task | Tool | Result | Evidence |
|---|---|---|---|
| SQL SELECT on seeded table (expect testedmcp-alpha) | query | pass | [{"type":"text","text":"[\n {\n \"name\": \"testedmcp-alpha\"\n },\n {\n \"name\": \"testedmcp-beta\"\n }\n]"}] |
Not tested
We did not test behavior with real credentials, security, or performance under load. These are planned; see methodology.
Tools listed
query
Config used in our test
{
"mcpServers": {
"postgres-legacy-reference": {
"command": "npx",
"args": [
"-y",
"@modelcontextprotocol/server-postgres",
"postgresql://postgres@127.0.0.1:5432/test"
]
}
}
}FAQ
Is Postgres (legacy reference) deprecated?
Yes. @modelcontextprotocol/server-postgres is deprecated on npm and its GitHub repo is archived (as of 2026-10-22). npm says: "Package no longer supported. Contact Support at https://www.npmjs.com/support for more info."
What replaces Postgres (legacy reference)?
None identified. We have no evidence of a maintained replacement yet.
Does Postgres (legacy reference) need an API key?
No. It completed an MCP handshake with no credentials and listed 1 tools.
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