# CallerKit (npm · callerkit-mcp)

Caller ID and phone lookup: names, spam reports, fraud risk score, name/email search.

- Trust score: 68/100 (medium)
- Change this week: +4
- Registry status: active
- Liveness: live
- Owner verified: no
- Last scored: 2026-10-22

## Components

- remote · `mcp.caller-kit.com`: 39/100, [markdown](https://verifymcp.io/servers/com-caller-kit-callerkit-mcp/mcp.md), [page](https://verifymcp.io/servers/com-caller-kit-callerkit-mcp/mcp)
- npm · `callerkit-mcp`: 68/100 (this document), [markdown](https://verifymcp.io/servers/com-caller-kit-callerkit-mcp/callerkit-mcp.md), [page](https://verifymcp.io/servers/com-caller-kit-callerkit-mcp/callerkit-mcp)

## Channel facts

- Registry: `npm`
- Package: `callerkit-mcp`
- Version: `0.3.0`
- 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 2026-10-22.

- **Supply Chain Security**: 98/100
  - No malware found by supply-chain analysis.
  - No known CVEs affecting this package version or its production dependencies.
  - No install/post-install scripts declared.
  - 31 of 94 dependencies flagged as unhealthy.
- **Provenance & Transparency**: 19/100
  - Repository check failed: the declared repository URL returned HTTP 404.
  - Provenance check failed: no build-provenance attestation is published.
  - Clear OSI-approved license (MIT).
  - Actively maintained (last published 10 days ago).
  - Security-disclosure policy not yet verified: we couldn't inspect the source repository.
- **Schema Quality & AI Usability**: 70/100
  - AI-judged instruction clarity (excellent).
  - Context-footprint check failed: tool/resource definitions use about 1018 tokens (~203/item across 5 items; 5 tools + 0 resources), over budget; trim descriptions and params.
  - Usage-examples check failed: none of the tools include examples.
- **Stability & Change Management**: 27/100
  - Stability observed for 8 of 30 days with no destabilising changes; credit accrues until the full window elapses.
- **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.
- **Tool Safety**: 100/100
  - No prompt-injection markers were found in the server instructions, tool names or descriptions we captured.
  - We read all 5 captured tool definition(s), and no name or description among them implies an irreversible operation.
  - An AI judge read all 6 captured unit(s) of tool text and found none that tries to manipulate the model reading it.
- **Capabilities**: 100/100
  - Implements a supported MCP spec version (2025-11-25); the latest is 2026-07-28.

## Install

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

CallerKit runs locally as an npm package, launched with npx -y callerkit-mcp. 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 com-caller-kit-callerkit-mcp -- npx -y callerkit-mcp
```

### Cursor

```json
{
  "mcpServers": {
    "com-caller-kit-callerkit-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "callerkit-mcp"
      ]
    }
  }
}
```

### VS Code

```json
{
  "servers": {
    "com-caller-kit-callerkit-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "callerkit-mcp"
      ]
    }
  }
}
```

### Codex

```bash
codex mcp add com-caller-kit-callerkit-mcp -- npx -y callerkit-mcp
```

### opencode

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

### OpenClaw

```bash
openclaw mcp add com-caller-kit-callerkit-mcp --command npx --arg -y --arg callerkit-mcp
```

### Hermes

```yaml
mcp_servers:
  com-caller-kit-callerkit-mcp:
    command: "npx"
    args: ["-y", "callerkit-mcp"]
```

### Netclaw

```json
{
  "McpServers": {
    "com-caller-kit-callerkit-mcp": {
      "Transport": "stdio",
      "Command": "npx",
      "Arguments": [
        "-y",
        "callerkit-mcp"
      ]
    }
  }
}
```

### Vellum

```bash
assistant mcp add com-caller-kit-callerkit-mcp -t stdio -c npx -a -y callerkit-mcp
```

### Other

```json
{
  "mcpServers": {
    "com-caller-kit-callerkit-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "callerkit-mcp"
      ]
    }
  }
}
```

## 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.

### 2026-10-22 (score 68, +1)

No change was recorded against any check on this day. Stability & Change Management went from 23 to 27. That category is still filling its 30-day observation window: 7 days of observed history at the previous scan, 8 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-10-21 (score 67, +3)

- [functional improvement] Stability: unverified → 0.23

### 2026-10-14 (score 64, +31)

- [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: excellent
- [functional] First check of Destructive annotations: pass
- [functional] First check of Schema quality: fail
- [functional] First check of Tool coverage: 100
- [functional] First check of Schema quality: fail

### 2026-10-12 (score 33)

First indexed and scored.

## MCP tools (5)

### `callerkit_lookup_phone` (~187 tokens)

Look up a phone number

Reverse phone lookup: find the registered name, aliases (with how many people saved each one), spam report count, emails, social profiles, carrier, line type and country for ONE phone number. Strongest coverage in the Middle East and Arab countries. Costs 1 CallerKit credit when a name is found; a miss is free. Returns personal data. Use only for a legitimate, lawful purpose (identifying a caller, fraud or lead checks) and do not compile profiles of private individuals.

Input parameters:

- `country` (string): ISO 3166-1 alpha-2 country code, e.g. AE, SA, EG.
- `phone` (string, required): Phone number, ideally in international E.164 format, e.g. +971501234567. Spaces and dashes are tolerated. A national number (e.g. 0501234567) also needs `country`.

### `callerkit_assess_number_risk` (~249 tokens)

Assess phone number risk

Fraud / lead-quality check for ONE phone number. Looks the number up and returns a 0-100 risk score, a level (low/medium/high/unknown) and the reasons. Optionally pass expected_name (e.g. the name on an order or signup) to check it against the names on record. The score is a transparent heuristic over spam reports, line type, name consistency and name match, NOT a verdict: 'unknown' means no record, which is not the same as safe. Use before shipping cash-on-delivery orders, accepting signups, or calling back a lead. Costs 1 credit when a name is found.

Input parameters:

- `country` (string): ISO 3166-1 alpha-2 country code, e.g. AE, SA, EG.
- `expected_name` (string): Name the customer gave (Latin or Arabic script). Compared against the primary name and aliases on record.
- `phone` (string, required): Phone number, ideally in international E.164 format, e.g. +971501234567. Spaces and dashes are tolerated. A national number (e.g. 0501234567) also needs `country`.

### `callerkit_search_by_name` (~191 tokens)

Search phone numbers by name

Find phone numbers, aliases and metadata matching a person or business NAME within a country. Requires a paid CallerKit plan (Pro or Custom). Costs 1 credit per result returned; results are paged (default 10 per page). Prefer business names or a person the user already has a legitimate reason to contact. Returns personal data. Use only for a legitimate, lawful purpose (identifying a caller, fraud or lead checks) and do not compile profiles of private individuals.

Input parameters:

- `country` (string, required): ISO 3166-1 alpha-2 country code to search in, e.g. AE, SA, EG. Required.
- `name` (string, required): Person or business name to search.
- `page` (integer): Result page, starting at 1 (default 1).
- `per_page` (integer): Results per page (default 10). Every result returned costs a credit.

### `callerkit_search_by_email` (~141 tokens)

Search contact details by email

Find the person or business details associated with an EMAIL address (names, phone numbers, social profiles where available). Requires a paid CallerKit plan (Pro or Custom). Costs 1 credit per result returned (at most 10). Returns personal data. Use only for a legitimate, lawful purpose (identifying a caller, fraud or lead checks) and do not compile profiles of private individuals.

Input parameters:

- `email` (string, required): Email address to look up.
- `page` (integer): Result page, starting at 1 (default 1).
- `per_page` (integer): Results per page (default 10). Every result returned costs a credit.

### `callerkit_bulk_lookup` (~156 tokens)

Look up several phone numbers

Look up and risk-score up to 25 phone numbers in one call (the CallerKit API itself has no bulk endpoint; this runs single lookups with limited concurrency). Returns a compact row per number (name, spam count, risk level/score). Duplicates are removed and invalid numbers are reported separately. Costs 1 credit per number with a name on record, so confirm with the user before running large lists. For deeper detail on one number call callerkit_lookup_phone.

Input parameters:

- `country` (string): Default ISO country for any national-format numbers in the list.
- `phones` (array, required): Phone numbers in E.164 format, e.g. ["+971501234567", "+201001234567"].

## Diagnostics

Captured diagnostic sections: Provenance, Dependencies. The full working is on the page: https://verifymcp.io/servers/com-caller-kit-callerkit-mcp/callerkit-mcp#diagnostics

## Score history

- 2026-10-22: 68
- 2026-10-21: 67
- 2026-10-20: 64
- 2026-10-19: 64
- 2026-10-18: 64
- 2026-10-17: 64
- 2026-10-16: 64
- 2026-10-15: 64
- 2026-10-14: 64
- 2026-10-13: 33
- 2026-10-12: 33

## Common questions

### What is the CallerKit MCP server?

CallerKit is an MCP server listed in the public MCP registry as com.caller-kit/callerkit-mcp. Caller ID and phone lookup: names, spam reports, fraud risk score, name/email search. This page covers its npm package (callerkit-mcp).

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

CallerKit scores 68 out of 100 on VerifyMCP. We found no known CVEs affecting it as of 22 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 CallerKit MCP server expose?

CallerKit exposes 5 tools: callerkit_lookup_phone, callerkit_assess_number_risk, callerkit_search_by_name, callerkit_search_by_email, callerkit_bulk_lookup. Their descriptions and schemas cost roughly 924 tokens of context every time the server is loaded.

### Is the CallerKit MCP server still maintained?

CallerKit is still listed as active in the MCP registry. We last reached this channel on 22 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 CallerKit MCP server under?

CallerKit 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/callerkit-mcp
- Socket report: https://socket.dev/npm/package/callerkit-mcp
- Website: https://caller-kit.com/docs#mcp
- Changelog RSS feed: https://verifymcp.io/servers/com-caller-kit-callerkit-mcp/callerkit-mcp.xml
- Changelog JSON feed: https://verifymcp.io/servers/com-caller-kit-callerkit-mcp/callerkit-mcp.json
- HTML version of this page: https://verifymcp.io/servers/com-caller-kit-callerkit-mcp/callerkit-mcp