io.github.mittalpk/pgvector
pgvector
Is the pgvector MCP server down? No. Installed with mcp<2, it started and listed its tools on 2026-11-03.
Similarity search, hybrid search, and index management for pgvector-backed PostgreSQL tables
needs mcp<2 probed 2026-11-14 · unchanged since 2026-11-03
A plain install of the package stops at the import below. These tool definitions are from a second install with mcp<2, started in a container with the network off, on 2026-11-03.
MCP error -32000: Connection closed ModuleNotFoundError: No module named 'mcp.server.fastmcp'. This is mcp 2.x, where FastMCP was renamed to MCPServer (from mcp
- Run it
- uvx --with 'mcp<2' mcp-server-pgvector@0.1.0 (stdio, probed in a container with the network off)
- Host
- pypi.org
- Reports itself as
- pgvector 1.30.0
- Capabilities
- experimental, prompts, resources, tools
- Repository
- https://github.com/mittalpk/mcp-server-pgvector
- Registry
- active, updated 2026-07-21 · registry entry
- Changes
- 2 recorded, reachable in 0 of them. A row is added when the result, the tool count or the cost changes.
Most expensive tools
Estimates with the o200k_base tokenizer.
| Tool | o200k estimate | Share of this server |
|---|---|---|
| similarity_search | 344 | 26 % |
| hybrid_search | 256 | 19 % |
| create_vector_index | 238 | 18 % |
| upsert_embedding | 182 | 14 % |
| explain_similarity_query | 169 | 13 % |
Compare this server with others.
More servers
Other registry entries on pypi.org, the ones next to this name; all of them.
- Minuet io.github.minuetai/minuet-mcp · needs mcp<2
- io.github.mischuh/canonic · needs network
- shotbox io.github.mishan/shotbox · needs args
- io.github.mister-franklin/gdpr-decisions · not probed
- PaperBanana-CN io.github.mituan-ai/paperbanana-cn · alive
- ClauseKeeper Compliance Scanner io.github.mityda/clausekeeper · needs mcp<2
- c3fst Biomedical Search io.github.mjandrews1/c3fst-biomedical-search · not probed
- io.github.mka142/doricomcp · alive
Servers that mention pgvector.
- Patent Intelligence MCP io.github.FoundryNet/patent-intel-mcp · timeout
- polymnemo io.github.PCBZ/polymnemo · needs auth
- Hindsight MemPalace io.github.holetron/hindsight-mempalace · alive
- io.github.volsier/memforge-memory · not found
- io.github.iamvirul/wso2-docs-mcp-server · needs env
- amu-pgvector io.github.sangaraju1988/amu-pgvector · crashed on start
- io.github.TKMD/reftrixmcp · crashed on start
- RemembrallMCP io.github.cdnsteve/remembrallmcp · no executable
History
We add a row when the result changes. A server with no change keeps its last row.
| Probed | Result | Init | Tools | Claude | o200k |
|---|---|---|---|---|---|
| 2026-11-03 08:42 | needs mcp<2 | 1.7 s | 7 | 2.5k | 1.3k |
| 2026-10-20 06:43 | crashed on start |
Badge for the README
The result of the latest probe, the tool count and the token cost. The feed has an entry for every probe that changed them.
A mail when this server changes
Stops answering, comes back, tool set or cost changes. One confirmation mail first, a stop link in every mail.
For the publisher
- The package imports FastMCP from mcp.server.fastmcp. mcp 2.0, the Python SDK of 28 July 2026, renamed FastMCP to MCPServer, and the package asks for mcp with no upper bound, so a plain install (uvx, pip) gets mcp 2.x and the server stops at the import. Installed with mcp<2, it starts and lists its tools. The fix for the publisher: pin mcp<2 in the dependencies, for example mcp>=1.2,<2, and publish a new version, or move to MCPServer as the SDK's migration guide says. Until then, run it with uvx --with 'mcp<2'.
The cause and the fix, with the code before and after: ModuleNotFoundError: No module named 'mcp.server.fastmcp'