Halfnine
PostgreSQL through Halfnine: describe, read-only queries, and changes you approve in the app.
What it does
Halfnine is an MCP server, a connector that lets an AI assistant use it as a tool. It is installed locally as a package and runs on your machine.
From the publisher's description, Electra Index matched it to one capability: sql querying. That makes it a candidate for tasks such as query databases in plain language or build data pipelines.
Facts come from the Official MCP Registry, as declared by the publisher. Capabilities are matched automatically (low confidence). None of this is a test of the tool.
At a glance
How to connect
As declared in the Official MCP Registry · not tested by Electra IndexInstall package
- MCP BUNDLE
https://github.com/notinferred/halfnine/releases/download/v0.2.0/halfnine-0.2.0.mcpb· runs locally (stdio)
No ready-made settings: the registry entry does not contain everything needed. Follow the publisher's instructions.
Tasks it helps with
Share of each task's required capabilities it covers| Query databases in plain language SQL Querying | 50% |
| Build data pipelines SQL Querying | 33% |
Similar tools
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Ready-made AI agents
- $25/mo · free plan · Prices & score →
- Wren AI54$179/mo · free plan · Prices & score →
- $36/mo · free plan · Prices & score →
- On quote · Prices & score →
Facts & evidence
Each fact shows where it was seen and when.| Fact | Value | Evidence | Source | Last confirmed |
|---|---|---|---|---|
| Install package | https://github.com/notinferred/halfnine/releases/download/v0.2.0/halfnine-0.2.0.mcpb | DECLARED | SRC-001 Official MCP Registry | 2h ago |
| Package registries | mcpb | DECLARED | SRC-001 Official MCP Registry | 2h ago |
| Local install (package) | yes | DECLARED | SRC-001 Official MCP Registry | 2h ago |
| Remote access (hosted) | no | DECLARED | SRC-001 Official MCP Registry | 2h ago |
| Repository | https://github.com/notinferred/halfnine | DECLARED | SRC-001 Official MCP Registry | 2h ago |
| Registry status | active | DECLARED | SRC-001 Official MCP Registry | 2h ago |
| Version | 0.2.0 | DECLARED | SRC-001 Official MCP Registry | 2h ago |
| MCP server | yes | DECLARED | SRC-001 Official MCP Registry | 2h ago |
Change history
- NEW30 Oct 2026first seen in the index
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How do I connect Halfnine?
Install the MCP bundle package https://github.com/notinferred/halfnine/releases/download/v0.2.0/halfnine-0.2.0.mcpb. The exact settings are in "How to connect" above, as declared in the Official MCP Registry.
What can I use Halfnine for?
Based on its description, it is most relevant to: query databases in plain language, build data pipelines.