# Dutyfinch (remote · dutyfinch.cybermax-tools.workers.dev)

US tariff lookup: HTS duty rates, Section 301 China lists, US–China tariff-cut flag.

- Trust score: 66/100 (medium)
- Registry status: active
- Liveness: live
- Owner verified: no
- Last scored: 2026-09-29

## Components

- remote · `dutyfinch.cybermax-tools.workers.dev`: 66/100 (this document), [markdown](https://verifymcp.io/servers/dev-workers-cybermax-tools-cybermax-dutyfinch/dutyfinch.md), [page](https://verifymcp.io/servers/dev-workers-cybermax-tools-cybermax-dutyfinch/dutyfinch)

## Channel facts

- Endpoint: `https://dutyfinch.cybermax-tools.workers.dev/mcp?via=mcp-registry`
- Transports: `streamable-http`
- Auth: `none`
- Version: `1.0.0`

## Trust breakdown

How this component scores in each security and reliability category. Every signal is checked automatically against the live server, 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 2026-09-29.

- **Endpoint Security**: 63/100
  - The endpoint's TLS certificate is valid, in date, and uses a strong key.
  - No authorisation is required to call this server. Every tool declares its destructiveHint and none is destructive, so open access doesn't expose one.
  - HTTPS check failed: the endpoint is reachable over plaintext HTTP.
  - HSTS check failed: the Strict-Transport-Security header is absent.
  - DNSSEC check failed: this domain isn't protected by DNSSEC.
- **Transport & Reachability**: 100/100
  - Verified streamable-http transport via a live MCP handshake.
- **Schema Quality & AI Usability**: 77/100
  - AI-judged instruction clarity (good).
  - Tool/resource definitions use about 339 tokens (~84/item across 4 items; 4 tools + 0 resources), lean.
  - Usage-examples check failed: none of the tools include examples.
- **Stability & Change Management**: 7/100
  - Stability observed for 2 of 30 days with no destabilising changes; credit accrues until the full window elapses.
- **Tool Coverage**: 75/100
  - 100% of tools have a non-trivial description (not blank, and not just the tool's name).
  - 25% 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 4 captured tool definition(s), and no name or description among them implies an irreversible operation.
  - An AI judge read all 5 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 Dutyfinch MCP server?

Dutyfinch is a hosted endpoint at https://dutyfinch.cybermax-tools.workers.dev/mcp?via=mcp-registry, so there is nothing to install locally. 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 --transport http dev-workers-cybermax-tools-cybermax-dutyfinch 'https://dutyfinch.cybermax-tools.workers.dev/mcp?via=mcp-registry'
```

### Cursor

```json
{
  "mcpServers": {
    "dev-workers-cybermax-tools-cybermax-dutyfinch": {
      "url": "https://dutyfinch.cybermax-tools.workers.dev/mcp?via=mcp-registry"
    }
  }
}
```

### VS Code

```json
{
  "servers": {
    "dev-workers-cybermax-tools-cybermax-dutyfinch": {
      "type": "http",
      "url": "https://dutyfinch.cybermax-tools.workers.dev/mcp?via=mcp-registry"
    }
  }
}
```

### Codex

```toml
[mcp_servers.dev-workers-cybermax-tools-cybermax-dutyfinch]
url = "https://dutyfinch.cybermax-tools.workers.dev/mcp?via=mcp-registry"
```

### opencode

```json
{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "dev-workers-cybermax-tools-cybermax-dutyfinch": {
      "type": "remote",
      "url": "https://dutyfinch.cybermax-tools.workers.dev/mcp?via=mcp-registry",
      "enabled": true
    }
  }
}
```

### OpenClaw

```bash
openclaw mcp add dev-workers-cybermax-tools-cybermax-dutyfinch --url 'https://dutyfinch.cybermax-tools.workers.dev/mcp?via=mcp-registry' --transport streamable-http
```

### Hermes

```yaml
mcp_servers:
  dev-workers-cybermax-tools-cybermax-dutyfinch:
    url: "https://dutyfinch.cybermax-tools.workers.dev/mcp?via=mcp-registry"
```

### Netclaw

```json
{
  "McpServers": {
    "dev-workers-cybermax-tools-cybermax-dutyfinch": {
      "Transport": "http",
      "Url": "https://dutyfinch.cybermax-tools.workers.dev/mcp?via=mcp-registry"
    }
  }
}
```

### Vellum

```bash
assistant mcp add dev-workers-cybermax-tools-cybermax-dutyfinch -t streamable-http -u 'https://dutyfinch.cybermax-tools.workers.dev/mcp?via=mcp-registry'
```

### Other

```json
{
  "mcpServers": {
    "dev-workers-cybermax-tools-cybermax-dutyfinch": {
      "type": "http",
      "url": "https://dutyfinch.cybermax-tools.workers.dev/mcp?via=mcp-registry"
    }
  }
}
```

The mcpServers block is a cross-client convention. Remote transports vary, so check your client's docs.

## 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.

### 2026-09-29 (score 66, +1)

No change was recorded against any check on this day. Stability & Change Management went from 3 to 7. That category is still filling its 30-day observation window: 1 days of observed history at the previous scan, 2 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-09-28 (score 65, 0)

- [functional] We updated how we score, so this day's move reflects our rubric, not a change to the server

### 2026-09-27 (score 65)

First indexed and scored.

## MCP tools (4)

### `lookup_hts_code` (~94 tokens)

Look up an HTS code

US tariff lookup for one HTS code (4, 6, 8 or 10 digits): description, general/special/column 2 duty rates, Section 301 China list status with the additional rate, exclusions, and the 2026 US–China reduction flag.

Input parameters:

- `code` (string, required): HTS code, e.g. 8516.60.40 or 9503000013

### `search_hts` (~63 tokens)

Search the HTS by product

Find US HTS codes from product words (e.g. "air fryer", "wooden toys") or a code prefix. Returns codes with description, general rate and Section 301 China summary.

Input parameters:

- `limit` (integer)
- `q` (string, required)

### `section301_lists` (~50 tokens)

Section 301 China lists

All Section 301 China tariff headings (lists 1, 2, 3, 4A, 4B, 2024 increases, exclusions) with rates, dates and code counts.

### `china_deal_status` (~52 tokens)

2026 US–China reduction list

Status of the 2026 US–China tariff reduction list (pending / notice_published / published) and, with code, whether that HTS code is on it.

Input parameters:

- `code` (string)

## Diagnostics

Captured diagnostic sections: TLS, DNSSEC, Authorisation, Transports. The full working is on the page: https://verifymcp.io/servers/dev-workers-cybermax-tools-cybermax-dutyfinch/dutyfinch#diagnostics

## Score history

- 2026-09-29: 66
- 2026-09-28: 65
- 2026-09-27: 65

## Common questions

### What is the Dutyfinch MCP server?

Dutyfinch is an MCP server listed in the public MCP registry as dev.workers.cybermax-tools.cybermax/dutyfinch. US tariff lookup: HTS duty rates, Section 301 China lists, US–China tariff-cut flag. This page covers its hosted endpoint (https://dutyfinch.cybermax-tools.workers.dev/mcp?via=mcp-registry).

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

Dutyfinch scores 66 out of 100 on VerifyMCP. 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 Dutyfinch MCP server expose?

Dutyfinch exposes 4 tools: lookup_hts_code, search_hts, section301_lists, china_deal_status. Their descriptions and schemas cost roughly 259 tokens of context every time the server is loaded.

### Does the Dutyfinch MCP server require authentication?

No. We connected to Dutyfinch without credentials and it answered, so anything it exposes is reachable by anyone who knows the address.

### Is the Dutyfinch MCP server still maintained?

Dutyfinch is still listed as active in the MCP registry. We last reached this channel on 29 September 2026. Those dates come from our own scans of the registry and the channel itself, not from anything the publisher announced.

## Links

- Remote endpoint: https://dutyfinch.cybermax-tools.workers.dev/mcp?via=mcp-registry
- Website: https://cybermax.cybermax-tools.workers.dev/store/dutyfinch-api/
- Changelog RSS feed: https://verifymcp.io/servers/dev-workers-cybermax-tools-cybermax-dutyfinch/dutyfinch.xml
- Changelog JSON feed: https://verifymcp.io/servers/dev-workers-cybermax-tools-cybermax-dutyfinch/dutyfinch.json
- HTML version of this page: https://verifymcp.io/servers/dev-workers-cybermax-tools-cybermax-dutyfinch/dutyfinch