Dunn
REMOTE · GETDUNN.ORG
Free invoice tools: due dates from payment terms, late fees, days late, payment reminder emails.
Available components
Last scanned (5 hours ago)
Scores higher than 54% of remote servers
Unreachable for 2 days in a row. Last reached 3 Nov 2026.
Category Finance and Payments
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. How we score → Why this is hard to score →
Endpoint Security11
- TLS not yet verified: we couldn't open a connection to check the certificate. View diagnostics → Unverified
- Authorisation not yet verified: we couldn't confirm whether this endpoint requires it. View diagnostics → Unverified
- HTTPS is enforced; there's no plaintext access path. View diagnostics → Pass
- HSTS not yet verified: we couldn't read the response headers to check for it. View diagnostics → Unverified
- DNSSEC check failed: this domain isn't protected by DNSSEC. See how to fix → View diagnostics → Fail
Transport & Reachability0
- Transport check failed: declared streamable-http, but we couldn't connect to verify it. See how to fix → View diagnostics → Fail
Schema Quality & AI Usability0
- Schema not yet verified: we couldn't read the endpoint's schema, or could read only part of its tool list.Unverified
Stability & Change Management0
- Stability not yet verified: not enough scan history yet (needs a 30-day window).Unverified
Tool Coverage0
- Tool coverage not yet verified: we couldn't read the endpoint's tools, or could read only part of the list.Unverified
Tool Safety0
- Tool safety not yet verified: we couldn't read the endpoint's tools, or could read only part of the list.Unverified
Capabilities0
- Capabilities not yet verified: we couldn't read the endpoint's capabilities.Unverified
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.
Every change we have recorded for this component, newest first. Security-relevant changes are always shown. ▲ marks a change for the better, ▼ a change for the worse; unmarked changes are neutral.
- 4 Nov 26 0
- Endpoint reachability: reachable → unreachable ▼ security
- HSTS header: fail → unverified ▼ security
- Authorization: partial → unverified ▼ security
- Tool safety: pass → unverified ▼ security
- TLS certificate: pass → unverified ▼ security
- Transport: pass → fail ▼ security
- Capabilities: pass → unverified ▼ functional
- Tool coverage: 100 → unverified ▼ functional
- First check of Schema quality: unverified functional
- 3 Nov 26 69
First indexed and scored.
Diagnostic detail from the automated scan of this channel: what the scanner observed at each step, so you can see exactly where a check passed or failed. It is informational only and never changes the trust score.
Captured 5 Nov 2026 · Probed https://getdunn.org/mcp
TLS unreached
Background: What to check on a remote MCP endpoint →
DNSSEC insecure
Validation of getdunn.org. — Not signed
| Zone | DS | Keys | Algorithms | Outcome |
|---|---|---|---|---|
| . | trust_anchor | 20326, 38696 | 8, 8 | Verified |
| org. | present | 26974 | 8 | Verified |
| getdunn.org. | absent | Unsigned (proven) parent-signed NSEC/NSEC3 proves an unsigned delegation |
Authentication Inconclusive
We could not reach the endpoint well enough to judge its authorisation posture.
| Result | Inconclusive |
|---|
Background: How OAuth 2.1 works in the 2026 MCP spec →
Transports 2 probes
| Transport | URL | Outcome | Status | Location |
|---|---|---|---|---|
| streamable-http | https://getdunn.org/mcp | Unreachable | ||
| http (plaintext) | http://getdunn.org/mcp | HTTPS enforced |
The tools this component advertises to a client, with an estimated token cost for each. Expand a tool to see its parameters and schema. The per-tool counts are indicative and are not scored directly; the schema's total context footprint is one signal in Schema Quality & AI Usability. A tool's description is untrusted text the model reads on every call, which is what makes this list a security surface and not just an inventory: how tool poisoning works →
how_late_is_this_invoice How late is this invoice? ~77
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.
| Name | Type | Req | Description |
|---|---|---|---|
| due_date | string | yes | A calendar date, YYYY-MM-DD |
| today | string | – | Today's date, YYYY-MM-DD (defaults to today in New York) |
No output schema declared.
No examples provided.
invoice_due_date Due date from payment terms ~89
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.
| Name | Type | Req | Description |
|---|---|---|---|
| invoice_date | string | yes | A calendar date, YYYY-MM-DD |
| terms | string | yes | Payment terms, e.g. "net 30" |
No output schema declared.
No examples provided.
late_fee_calculator Late fee calculator ~153
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.
| Name | Type | Req | Description |
|---|---|---|---|
| amount | number | yes | Invoice amount in US dollars |
| due_date | string | yes | A calendar date, YYYY-MM-DD |
| fee_kind | string | yes | flat = a dollar amount, percent = % of the invoice |
| fee_value | number | yes | Dollars for flat (e.g. 25) or the percent for percent (e.g. 1.5) |
| grace_days | integer | yes | Days after the due date before the fee applies; 0 = the day after the due date |
No output schema declared.
No examples provided.
payment_reminder_email Payment reminder email ~192
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.
| Name | Type | Req | Description |
|---|---|---|---|
| amount | number | yes | Invoice amount in US dollars |
| business_name | string | – | – |
| client_name | string | yes | The client's name, as you'd greet them |
| due_date | string | yes | 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 | yes | Your name, to sign the email |
| today | string | – | A calendar date, YYYY-MM-DD |
| tone | string | – | – |
No output schema declared.
No examples provided.
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.
remote · getdunn.org
claude mcp add --transport http org-getdunn-dunn 'https://getdunn.org/mcp'
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.