# Dunn (remote · getdunn.org)

Free invoice tools: due dates from payment terms, late fees, days late, payment reminder emails.

- Trust score: 69/100 (medium)
- Registry status: active
- Liveness: live
- Owner verified: no
- Last scored: 2026-11-05

## Components

- remote · `getdunn.org`: 69/100 (this document), [markdown](https://verifymcp.io/servers/org-getdunn-dunn/getdunn.md), [page](https://verifymcp.io/servers/org-getdunn-dunn/getdunn)

## Channel facts

- Endpoint: `https://getdunn.org/mcp`
- 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 2026-11-05.

- **Endpoint Security**: 11/100
  - TLS not yet verified: we couldn't open a connection to check the certificate.
  - Authorisation not yet verified: we couldn't confirm whether this endpoint requires it.
  - HTTPS is enforced; there's no plaintext access path.
  - HSTS not yet verified: we couldn't read the response headers to check for it.
  - DNSSEC check failed: this domain isn't protected by DNSSEC.
- **Transport & Reachability**: 0/100
  - Transport check failed: declared streamable-http, but we couldn't connect to verify it.
- **Schema Quality & AI Usability**: 0/100
  - Schema not yet verified: we couldn't read the endpoint's schema, or could read only part of its tool list.
- **Stability & Change Management**: 0/100
  - Stability not yet verified: not enough scan history yet (needs a 30-day window).
- **Tool Coverage**: 0/100
  - Tool coverage not yet verified: we couldn't read the endpoint's tools, or could read only part of the list.
- **Tool Safety**: 0/100
  - Tool safety not yet verified: we couldn't read the endpoint's tools, or could read only part of the list.
- **Capabilities**: 0/100
  - Capabilities not yet verified: we couldn't read the endpoint's capabilities.

**Unverified: 5 categories.** Categories scored 0 because we could not verify them: authentication we do not have, an unreachable endpoint, or not enough scan history. We only credit what we can confirm.

## Install

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

Dunn is a hosted endpoint at https://getdunn.org/mcp, 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 org-getdunn-dunn 'https://getdunn.org/mcp'
```

### Cursor

```json
{
  "mcpServers": {
    "org-getdunn-dunn": {
      "url": "https://getdunn.org/mcp"
    }
  }
}
```

### VS Code

```json
{
  "servers": {
    "org-getdunn-dunn": {
      "type": "http",
      "url": "https://getdunn.org/mcp"
    }
  }
}
```

### Codex

```toml
[mcp_servers.org-getdunn-dunn]
url = "https://getdunn.org/mcp"
```

### opencode

```json
{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "org-getdunn-dunn": {
      "type": "remote",
      "url": "https://getdunn.org/mcp",
      "enabled": true
    }
  }
}
```

### OpenClaw

```bash
openclaw mcp add org-getdunn-dunn --url 'https://getdunn.org/mcp' --transport streamable-http
```

### Hermes

```yaml
mcp_servers:
  org-getdunn-dunn:
    url: "https://getdunn.org/mcp"
```

### Netclaw

```json
{
  "McpServers": {
    "org-getdunn-dunn": {
      "Transport": "http",
      "Url": "https://getdunn.org/mcp"
    }
  }
}
```

### Vellum

```bash
assistant mcp add org-getdunn-dunn -t streamable-http -u 'https://getdunn.org/mcp'
```

### Other

```json
{
  "mcpServers": {
    "org-getdunn-dunn": {
      "type": "http",
      "url": "https://getdunn.org/mcp"
    }
  }
}
```

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.

### 2026-11-04 (score 69, 0)

- [security regression] Endpoint reachability: reachable → unreachable
- [security regression] HSTS header: fail → unverified
- [security regression] Authorization: partial → unverified
- [security regression] Tool safety: pass → unverified
- [security regression] TLS certificate: pass → unverified
- [security regression] Transport: pass → fail
- [functional regression] Capabilities: pass → unverified
- [functional regression] Tool coverage: 100 → unverified
- [functional] First check of Schema quality: unverified

### 2026-11-03 (score 69)

First indexed and scored.

## MCP tools (4)

### `invoice_due_date` (~89 tokens)

Due date from payment terms

Exact due date for an invoice from its date and payment terms ("net 30", "due on receipt", "EOM", "net 30 EOM", "2/10 net 30"), including any early-payment discount date.

Input parameters:

- `invoice_date` (string, required): A calendar date, YYYY-MM-DD
- `terms` (string, required): Payment terms, e.g. "net 30"

### `late_fee_calculator` (~153 tokens)

Late fee calculator

Works out a late fee: the amount, the new total, the exact day it applies, a ready-to-use line for the invoice, and whether the fee is in the usual range.

Input parameters:

- `amount` (number, required): Invoice amount in US dollars
- `due_date` (string, required): A calendar date, YYYY-MM-DD
- `fee_kind` (string, required): flat = a dollar amount, percent = % of the invoice
- `fee_value` (number, required): Dollars for flat (e.g. 25) or the percent for percent (e.g. 1.5)
- `grace_days` (integer, required): Days after the due date before the fee applies; 0 = the day after the due date

### `how_late_is_this_invoice` (~77 tokens)

How late is this invoice?

How many days late an invoice is (or until it is due), and what to send the client now and next, following a proven reminder schedule.

Input parameters:

- `due_date` (string, required): A calendar date, YYYY-MM-DD
- `today` (string): Today's date, YYYY-MM-DD (defaults to today in New York)

### `payment_reminder_email` (~192 tokens)

Payment reminder email

Writes the right payment reminder for where the invoice is now (before due, due today, late, or a final notice), with subject line. Polite by default; firm on request.

Input parameters:

- `amount` (number, required): Invoice amount in US dollars
- `business_name` (string)
- `client_name` (string, required): The client's name, as you'd greet them
- `due_date` (string, required): A calendar date, YYYY-MM-DD
- `invoice_number` (string)
- `late_fee` (string): The agreed late-fee terms, e.g. "a $25 late fee applies if unpaid 7 days after the due date."
- `pay_link` (string): Payment link to include, if any
- `sender_name` (string, required): Your name, to sign the email
- `today` (string): A calendar date, YYYY-MM-DD
- `tone` (string)

## Diagnostics

Captured diagnostic sections: TLS, DNSSEC, Authorisation, Transports. The full working is on the page: https://verifymcp.io/servers/org-getdunn-dunn/getdunn#diagnostics

## Score history

- 2026-11-05: 69
- 2026-11-04: 69
- 2026-11-03: 69

## Common questions

### What is the Dunn MCP server?

Dunn is an MCP server listed in the public MCP registry as org.getdunn/dunn. Free invoice tools: due dates from payment terms, late fees, days late, payment reminder emails. This page covers its hosted endpoint (https://getdunn.org/mcp).

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

Dunn scores 69 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 Dunn MCP server expose?

Dunn exposes 4 tools: invoice_due_date, late_fee_calculator, how_late_is_this_invoice, payment_reminder_email. Their descriptions and schemas cost roughly 511 tokens of context every time the server is loaded.

### Does the Dunn MCP server require authentication?

Its publisher declares no required credentials for Dunn. We have not been able to confirm that against the live endpoint, and a server can require authorisation without declaring it here.

### Is the Dunn MCP server still maintained?

Dunn is still listed in the MCP registry, though our most recent checks did not reach this channel. We last reached this channel on 3 November 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://getdunn.org/mcp
- Website: https://getdunn.org/ai
- Changelog RSS feed: https://verifymcp.io/servers/org-getdunn-dunn/getdunn.xml
- Changelog JSON feed: https://verifymcp.io/servers/org-getdunn-dunn/getdunn.json
- HTML version of this page: https://verifymcp.io/servers/org-getdunn-dunn/getdunn