# typeprobe (npm · typeprobe)

TypeScript inferred types, completions and type errors for AI coding agents

- Trust score: 68/100 (medium)
- Registry status: active
- Liveness: live
- Owner verified: no
- Last scored: 2026-10-17

## Components

- npm · `typeprobe`: 68/100 (this document), [markdown](https://verifymcp.io/servers/clockblocker-typeprobe/typeprobe.md), [page](https://verifymcp.io/servers/clockblocker-typeprobe/typeprobe)

## Channel facts

- Registry: `npm`
- Package: `typeprobe`
- Version: `4.0.0`
- Transport: `stdio`

## Trust breakdown

How this component scores in each security and reliability category. Every signal is checked automatically from public evidence about the published package, including repeated runs of it in an isolated sandbox, and we only credit what we can confirm. Scores are 0–100 per category. Scoring method: https://verifymcp.io/docs/scoring (what has changed: https://verifymcp.io/docs/scoring/changelog)

Scored 2026-10-17.

- **Supply Chain Security**: 100/100
  - No malware found by supply-chain analysis.
  - No known CVEs affecting this package version or its production dependencies.
  - No install/post-install scripts declared.
  - 0 of 25 dependencies flagged as unhealthy.
- **Provenance & Transparency**: 45/100
  - Source repository is publicly reachable at the declared URL.
  - Provenance check failed: no build-provenance attestation is published.
  - Clear OSI-approved license (MIT).
  - Actively maintained (last published 6 days ago).
  - Disclosure check failed: no security disclosure policy was found in the source repository.
- **Schema Quality & AI Usability**: 63/100
  - AI-judged instruction clarity (good).
  - Context-footprint check failed: tool/resource definitions use about 1237 tokens (~206/item across 6 items; 6 tools + 0 resources), over budget; trim descriptions and params.
  - Usage-examples check failed: none of the tools include examples.
- **Stability & Change Management**: 0/100
  - Stability not yet verified: not enough scan history yet (needs a 30-day window).
- **Tool Coverage**: 100/100
  - 100% of tools have a non-trivial description (not blank, and not just the tool's name).
  - 100% of tool parameters carry a description.
  - Structured output schemas are declared (100% of tools); any adoption earns full credit.
- **Tool Safety**: 100/100
  - No prompt-injection markers were found in the server instructions, tool names or descriptions we captured.
  - We read all 6 captured tool definition(s), and no name or description among them implies an irreversible operation.
  - An AI judge read all 7 captured unit(s) of tool text and found none that tries to manipulate the model reading it.
- **Capabilities**: 100/100
  - Implements a current MCP spec version (2026-07-28).

**Unverified: 1 category.** A category scored 0 because we could not verify it: a data source with nothing on this package, evidence we could not reach, or a check we could not run. We only credit what we can confirm.

## Install

### How do I install the typeprobe MCP server?

typeprobe runs locally as an npm package, launched with npx -y typeprobe. Ready-made configuration for Claude, Cursor, VS Code, Codex and 5 more is on this page, copied from each client's own documentation.

### Claude

```bash
claude mcp add clockblocker-typeprobe -- npx -y typeprobe
```

### Cursor

```json
{
  "mcpServers": {
    "clockblocker-typeprobe": {
      "command": "npx",
      "args": [
        "-y",
        "typeprobe"
      ]
    }
  }
}
```

### VS Code

```json
{
  "servers": {
    "clockblocker-typeprobe": {
      "command": "npx",
      "args": [
        "-y",
        "typeprobe"
      ]
    }
  }
}
```

### Codex

```bash
codex mcp add clockblocker-typeprobe -- npx -y typeprobe
```

### opencode

```json
{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "clockblocker-typeprobe": {
      "type": "local",
      "command": [
        "npx",
        "-y",
        "typeprobe"
      ],
      "enabled": true
    }
  }
}
```

### OpenClaw

```bash
openclaw mcp add clockblocker-typeprobe --command npx --arg -y --arg typeprobe
```

### Hermes

```yaml
mcp_servers:
  clockblocker-typeprobe:
    command: "npx"
    args: ["-y", "typeprobe"]
```

### Netclaw

```json
{
  "McpServers": {
    "clockblocker-typeprobe": {
      "Transport": "stdio",
      "Command": "npx",
      "Arguments": [
        "-y",
        "typeprobe"
      ]
    }
  }
}
```

### Vellum

```bash
assistant mcp add clockblocker-typeprobe -t stdio -c npx -a -y typeprobe
```

### Other

```json
{
  "mcpServers": {
    "clockblocker-typeprobe": {
      "command": "npx",
      "args": [
        "-y",
        "typeprobe"
      ]
    }
  }
}
```

## Changelog

Every change recorded for this component, newest first. Days that predate change tracking, or that we cannot explain, say so: "we were watching and nothing happened" and "we were not watching" are different claims.

### 2026-10-13 (score 68, +29)

- [security improvement] Injection markers: unverified → pass
- [security] First check of Judged manipulation: pass
- [security] Stability: Stability not yet verified: not enough scan history yet (needs a 30-day window).
- [functional improvement] Tool coverage: unverified → 100
- [functional improvement] MCP protocol: unverified → pass
- [functional] First check of Schema quality: fail
- [functional] First check of Destructive annotations: pass
- [functional] First check of Schema quality: fail
- [functional] First check of Schema quality: good
- [functional] First check of Tool coverage: 100
- [functional] First check of Tool coverage: 100

### 2026-10-12 (score 39)

First indexed and scored.

## MCP tools (6)

### `hover_by_name` (~226 tokens)

The type TypeScript infers for a named variable, function, parameter, property, or type. Use before writing an annotation, when unsure what a generic or call resolves to, or instead of reading .d.ts files.

Input parameters:

- `backend`: Default typescript7; retry with typescript6 if it fails or looks wrong
- `file` (string, required): TS/JS file: absolute, or relative to the server's cwd
- `full` (boolean): Untruncated types (no "... 12 more ..."), all overloads
- `include_cost` (boolean): Count type instantiations; typescript6 only
- `include_docs` (boolean): Also return JSDoc/TSDoc
- `line` (integer): 1-based line, to pick among repeated names
- `max_chars` (integer): Text cap per type (default 4000 chars; 0: none)
- `name` (string, required): Symbol name, e.g. "createHandler"
- `project` (string): tsconfig.json; default: the nearest one above file

Output parameters:

- `error` (object)
- `ok` (boolean)
- `result` (object)
- `version`

### `hover` (~257 tokens)

The type at a token on a line, like an editor hover; generic calls show their instantiated types. Use when hover_by_name can't name the token: callback parameters, expressions, repeated names.

Input parameters:

- `backend`: Default typescript7; retry with typescript6 if it fails or looks wrong
- `column` (integer): 1-based column; alternative to text
- `file` (string, required): TS/JS file: absolute, or relative to the server's cwd
- `full` (boolean): Untruncated types (no "... 12 more ..."), all overloads
- `include_cost` (boolean): Count type instantiations; typescript6 only
- `include_docs` (boolean): Also return JSDoc/TSDoc
- `line` (integer, required): 1-based line
- `max_chars` (integer): Text cap per type (default 4000 chars; 0: none)
- `occurrence` (integer): Which match of text on the line (default 1)
- `project` (string): tsconfig.json; default: the nearest one above file
- `text` (string): Token copied from the line, e.g. "useState"; whole identifiers match first. Instead of column

Output parameters:

- `error` (object)
- `ok` (boolean)
- `result` (object)
- `version`

### `batch_hover` (~192 tokens)

Up to 100 hovers in one call, across files. Items: {name, line?}, {line, text, occurrence?}, or {line, column}; failures are per item.

Input parameters:

- `backend`: Default typescript7; retry with typescript6 if it fails or looks wrong
- `file` (string): Shared file for items without one
- `full` (boolean): Untruncated types (no "... 12 more ..."), all overloads
- `include_cost` (boolean): Count type instantiations; typescript6 only
- `include_docs` (boolean): Also return JSDoc/TSDoc
- `max_chars` (integer): Text cap per type (default 4000 chars; 0: none)
- `positions` (array, required): 1-100 lookups
- `project` (string): tsconfig.json; default: the nearest one above file

Output parameters:

- `error` (object)
- `ok` (boolean)
- `result` (object)
- `version`

### `completions` (~163 tokens)

The completions TypeScript offers at a cursor, including string-literal union members. Use to find valid values for an argument, key, or import before writing it. Returns the top 50.

Input parameters:

- `column` (integer, required): 1-based column; the cursor sits before it, e.g. just inside an opening quote
- `file` (string, required): TS/JS file: absolute, or relative to the server's cwd
- `limit` (integer): Max entries (default 50)
- `line` (integer, required): 1-based line
- `prefix` (string): Name prefix, case-insensitive; default: the text left of the cursor; "" lists all
- `project` (string): tsconfig.json; default: the nearest one above file

Output parameters:

- `error` (object)
- `ok` (boolean)
- `result` (object)
- `version`

### `diagnostics` (~116 tokens)

Check one file for type errors without running tsc on the whole project. Call it on each file you edit; the edit is done when none reports an error.

Input parameters:

- `backend`: Default typescript7; retry with typescript6 if it fails or looks wrong
- `file` (string, required): TS/JS file: absolute, or relative to the server's cwd
- `include_suggestions` (boolean): Also report suggestions such as unused variables
- `project` (string): tsconfig.json; default: the nearest one above file

Output parameters:

- `error` (object)
- `ok` (boolean)
- `result` (object)
- `version`

### `annotations` (~88 tokens)

Type annotations in one file that TypeScript would infer anyway (redundant) or that are wider than the inferred type (widening, often an intended contract). Use when reviewing or cleaning up types.

Input parameters:

- `file` (string, required): TS/JS file: absolute, or relative to the server's cwd
- `project` (string): tsconfig.json; default: the nearest one above file

Output parameters:

- `error` (object)
- `ok` (boolean)
- `result` (object)
- `version`

## Diagnostics

Captured diagnostic sections: Provenance, Dependencies. The full working is on the page: https://verifymcp.io/servers/clockblocker-typeprobe/typeprobe#diagnostics

## Score history

- 2026-10-17: 68
- 2026-10-16: 68
- 2026-10-15: 68
- 2026-10-14: 68
- 2026-10-13: 68
- 2026-10-12: 39

## Common questions

### What is the typeprobe MCP server?

typeprobe is an MCP server listed in the public MCP registry as io.github.clockblocker/typeprobe. TypeScript inferred types, completions and type errors for AI coding agents. This page covers its npm package (typeprobe).

### Is the typeprobe MCP server safe to use?

typeprobe scores 68 out of 100 on VerifyMCP. We found no known CVEs affecting it as of 17 October 2026. It declares no install or post-install scripts. That is a record of what we were able to check automatically, not an endorsement. The category breakdown on this page shows every signal behind the number, including the ones we could not confirm.

### What tools does the typeprobe MCP server expose?

typeprobe exposes 6 tools: hover_by_name, hover, batch_hover, completions, diagnostics, annotations. Their descriptions and schemas cost roughly 1,042 tokens of context every time the server is loaded.

### Is the typeprobe MCP server still maintained?

typeprobe is still listed as active in the MCP registry. We last reached this channel on 17 October 2026. Those dates come from our own scans of the registry and the channel itself, not from anything the publisher announced.

### What licence is the typeprobe MCP server under?

typeprobe declares the MIT licence, which is OSI-approved. That covers the source only, and says nothing about the cost of any service it calls.

## Links

- npm package: https://www.npmjs.com/package/typeprobe
- Socket report: https://socket.dev/npm/package/typeprobe
- Repository: https://github.com/clockblocker/typeprobe
- Website: https://clockblocker.github.io/typeprobe/
- Changelog RSS feed: https://verifymcp.io/servers/clockblocker-typeprobe/typeprobe.xml
- Changelog JSON feed: https://verifymcp.io/servers/clockblocker-typeprobe/typeprobe.json
- HTML version of this page: https://verifymcp.io/servers/clockblocker-typeprobe/typeprobe