tilwhen date engine
REMOTE · MCP.TILWHEN.COM · SCANNED AUG 3
Deterministic date arithmetic with auditable receipts: business days, due dates, holidays.
Available components
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 →
Endpoint Security80
- The endpoint's TLS certificate is valid, in date, and uses a strong key. View diagnostics → Pass
- No authorisation is required to call this server. Every tool declares its destructiveHint and none is destructive, so open access doesn't expose one. See how to fix → View diagnostics → Partial
- HTTPS is enforced; there's no plaintext access path. View diagnostics → Pass
- The HSTS (Strict-Transport-Security) header is present. View diagnostics → Pass
- DNSSEC check failed: this domain isn't protected by DNSSEC. See how to fix → View diagnostics → Fail
Transport & Reachability100
- Verified streamable-http transport via a live MCP handshake. View diagnostics → Pass
Schema Quality & AI Usability82
- 100% of prompts and resources have a non-trivial description (not blank, and not just the item's name).Pass
- AI-judged instruction clarity (excellent).Pass
- Context-footprint check failed: tool/resource definitions use about 1643 tokens (~136/item across 12 items; 9 tools + 3 resources), over budget; trim descriptions and params. See how to fix → Fail
- Usage-examples check failed: none of the tools include examples. See how to fix → Fail
Stability & Change Management27
- Stability observed for 8 of 30 days with no destabilising changes; credit accrues until the full window elapses.Partial
Tool Coverage90
- 100% of tools have a non-trivial description (not blank, and not just the tool's name).Pass
- 65% of tool parameters carry a description.Partial
- Structured output schemas are declared (100% of tools); any adoption earns full credit.Pass
Capabilities100
- Implements a supported MCP spec version (2025-11-25); the latest is 2026-07-28.Pass
Add this component to your MCP client. Where a client-specific snippet is available, pick your client below and copy it straight into your config; otherwise use the connection detail shown.
remote · mcp.tilwhen.com
claude mcp add --transport http com-tilwhen-tilwhen https://mcp.tilwhen.com/mcp
[mcp_servers.com-tilwhen-tilwhen] url = "https://mcp.tilwhen.com/mcp"
{
"$schema": "https://opencode.ai/config.json",
"mcp": {
"com-tilwhen-tilwhen": {
"type": "remote",
"url": "https://mcp.tilwhen.com/mcp",
"enabled": true
}
}
} openclaw mcp add com-tilwhen-tilwhen --url https://mcp.tilwhen.com/mcp --transport streamable-http
mcp_servers:
com-tilwhen-tilwhen:
url: "https://mcp.tilwhen.com/mcp" {
"mcpServers": {
"com-tilwhen-tilwhen": {
"type": "http",
"url": "https://mcp.tilwhen.com/mcp"
}
}
} The mcpServers block is a cross-client convention. Remote transports vary, so check your client's docs.
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.
- 2 Aug 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 20 to 23. That category is still filling its 30-day observation window: 6 days of observed history at the previous scan, 7 at this one. The score rises as the window fills, whether or not the server changes.
- 31 Jul 26 +3
- We updated how we score, so this day's move reflects our rubric, not a change to the server See what changed → functional
- 30 Jul 26 +1
- We updated how we score, so this day's move reflects our rubric, not a change to the server See what changed → functional
- 29 Jul 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 7 to 10. That category is still filling its 30-day observation window: 2 days of observed history at the previous scan, 3 at this one. The score rises as the window fills, whether or not the server changes.
- 27 Jul 26 +1
- We updated how we score, so this day's move reflects our rubric, not a change to the server See what changed → functional
- 26 Jul 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 3 Aug 2026 · Probed https://mcp.tilwhen.com/mcp
TLS valid
Negotiated TLS 1.3 with TLS_AES_128_GCM_SHA256 .
| Subject | Issuer | Valid from | Valid until | Key | Signature | Serial |
|---|---|---|---|---|---|---|
| CN=tilwhen.com | CN=WE1,O=Google Trust Services,C=US | 26 Jul 2026 | 24 Oct 2026 | ECDSA 256 | ECDSA-SHA256 | a72591d65c3c549e1391491ccdef5f9c |
| SANs: tilwhen.com, mcp.tilwhen.com, *.mcp.tilwhen.com | ||||||
| CN=WE1,O=Google Trust Services,C=US (CA) | CN=GTS Root R4,O=Google Trust Services LLC,C=US | 13 Dec 2023 | 20 Feb 2029 | ECDSA 256 | ECDSA-SHA384 | 7ff31977972c224a76155d13b6d685e3 |
| CN=GTS Root R4,O=Google Trust Services LLC,C=US (CA) | CN=GlobalSign Root CA,OU=Root CA,O=GlobalSign nv-sa,C=BE | 15 Nov 2023 | 28 Jan 2028 | ECDSA 384 | SHA256-RSA | 7fe530bf331343bedd821610493d8a1b |
DNSSEC insecure
Validation of mcp.tilwhen.com. — Not signed
| Zone | DS | Keys | Algorithms | Outcome |
|---|---|---|---|---|
| . | trust_anchor | 20326, 38696 | 8, 8 | Verified |
| com. | present | 19718 | 13 | Verified |
| tilwhen.com. | absent | Unsigned (proven) parent-signed NSEC/NSEC3 proves an unsigned delegation |
Authentication No authorisation required
The endpoint answered without asking for a token. Anyone who knows the URL can reach it.
| Result | No authorisation required |
|---|---|
| HTTP status | 200 |
| Header | Value |
|---|---|
| strict-transport-security | max-age=31536000; includeSubDomains |
| x-content-type-options | nosniff |
| referrer-policy | strict-origin-when-cross-origin |
Transports 2 probes
| Transport | URL | Outcome | Status | Location |
|---|---|---|---|---|
| streamable-http | https://mcp.tilwhen.com/mcp | Verified | 200 | |
| http (plaintext) | http://mcp.tilwhen.com/mcp | HTTPS enforced | 301 | https://mcp.tilwhen.com/mcp |
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.
add_days Add calendar days to a date ~83
The date N whole calendar days after a date (exclusive counting: the start date is day 0).
| Name | Type | Req | Description |
|---|---|---|---|
| date | string | — | ISO date YYYY-MM-DD, or "today" (resolved in tz) |
| days | integer | yes | — |
| tz | string | — | IANA timezone that defines "today" (e.g. Africa/Kampala). Default UTC. |
| Name | Type | Req | Description |
|---|---|---|---|
| answer | object | yes | The calculated answer (kind-discriminated) |
| receipt | object | yes | Auditable receipt: inputs, timezone, convention, workweek, holiday calendar, exclusions, versions, stable result ID |
No examples provided.
business_days Business-day calculations ~241
Span mode (from+to): business days between two dates, exclusive of the start day, inclusive of the end day. Add mode (days, optional date): the date N business days away. Optional holiday jurisdiction or custom calendar, and a selectable working week.
| Name | Type | Req | Description |
|---|---|---|---|
| customHolidays | array | — | Custom organizational holiday calendar as ISO dates (mutually exclusive with jurisdiction) |
| date | — | — | ISO date YYYY-MM-DD, or "today" (resolved in tz) |
| days | integer | — | — |
| from | string | — | ISO date YYYY-MM-DD, or "today" (resolved in tz) |
| jurisdiction | string | — | Holiday jurisdiction id: US, GB, GB-SCT, GB-NIR, IE, FR, CA, AU, UG (alias UK for GB). No default: omit for no holiday calendar. |
| to | — | — | ISO date YYYY-MM-DD, or "today" (resolved in tz) |
| tz | string | — | IANA timezone that defines "today" (e.g. Africa/Kampala). Default UTC. |
| workweek | string | — | Working week. Default mon-fri (Sat+Sun weekend). |
| Name | Type | Req | Description |
|---|---|---|---|
| answer | object | yes | The calculated answer (kind-discriminated) |
| receipt | object | yes | Auditable receipt: inputs, timezone, convention, workweek, holiday calendar, exclusions, versions, stable result ID |
No examples provided.
days_between Days between two dates ~80
Signed whole calendar days from one date to another, midnight to midnight, endpoints exclusive (the gap).
| Name | Type | Req | Description |
|---|---|---|---|
| from | string | yes | ISO date YYYY-MM-DD, or "today" (resolved in tz) |
| to | — | yes | — |
| tz | string | — | IANA timezone that defines "today" (e.g. Africa/Kampala). Default UTC. |
| Name | Type | Req | Description |
|---|---|---|---|
| answer | object | yes | The calculated answer (kind-discriminated) |
| receipt | object | yes | Auditable receipt: inputs, timezone, convention, workweek, holiday calendar, exclusions, versions, stable result ID |
No examples provided.
explain Explain a calculation step by step ~278
Runs any operation and returns the receipt plus human-readable derivation steps. Accepts the same fields as the other tools, discriminated by op.
| Name | Type | Req | Description |
|---|---|---|---|
| customHolidays | array | — | Custom organizational holiday calendar as ISO dates (mutually exclusive with jurisdiction) |
| date | string | — | ISO date YYYY-MM-DD, or "today" (resolved in tz) |
| days | integer | — | — |
| event | string | — | — |
| from | — | — | ISO date YYYY-MM-DD, or "today" (resolved in tz) |
| invoiceDate | — | — | ISO date YYYY-MM-DD, or "today" (resolved in tz) |
| jurisdiction | string | — | Holiday jurisdiction id: US, GB, GB-SCT, GB-NIR, IE, FR, CA, AU, UG (alias UK for GB). No default: omit for no holiday calendar. |
| net | integer | — | — |
| op | string | yes | — |
| roll | boolean | — | — |
| to | — | — | ISO date YYYY-MM-DD, or "today" (resolved in tz) |
| tz | string | — | IANA timezone that defines "today" (e.g. Africa/Kampala). Default UTC. |
| weekday | integer | — | — |
| workweek | string | — | Working week. Default mon-fri (Sat+Sun weekend). |
| year | integer | — | — |
| Name | Type | Req | Description |
|---|---|---|---|
| receipt | object | yes | Auditable receipt for the operation |
| steps | array | yes | Human-readable derivation, identical to the REST /api/v1/explain output |
No examples provided.
holidays Public holidays for a jurisdiction and year ~90
Observed public holidays with the nominal (legal) date and status: rule (statutory) or declared (officially declared for that year). Declared-only holidays are omitted for undeclared years, with a holiday_data_incomplete warning.
| Name | Type | Req | Description |
|---|---|---|---|
| jurisdiction | string | yes | US, GB, GB-SCT, GB-NIR, CA, AU, UG (alias UK) |
| year | integer | yes | — |
| Name | Type | Req | Description |
|---|---|---|---|
| answer | object | yes | The calculated answer (kind-discriminated) |
| receipt | object | yes | Auditable receipt: inputs, timezone, convention, workweek, holiday calendar, exclusions, versions, stable result ID |
No examples provided.
invoice_due Invoice due date from net terms ~193
Due date for Net-N payment terms (calendar days, invoice date = day 0). Optional roll-forward past weekends and, with a jurisdiction or custom calendar, public holidays.
| Name | Type | Req | Description |
|---|---|---|---|
| customHolidays | array | — | Custom organizational holiday calendar as ISO dates (mutually exclusive with jurisdiction) |
| invoiceDate | string | — | ISO date YYYY-MM-DD, or "today" (resolved in tz) |
| jurisdiction | string | — | Holiday jurisdiction id: US, GB, GB-SCT, GB-NIR, IE, FR, CA, AU, UG (alias UK for GB). No default: omit for no holiday calendar. |
| net | integer | yes | — |
| roll | boolean | — | — |
| tz | string | — | IANA timezone that defines "today" (e.g. Africa/Kampala). Default UTC. |
| workweek | string | — | Working week. Default mon-fri (Sat+Sun weekend). |
| Name | Type | Req | Description |
|---|---|---|---|
| answer | object | yes | The calculated answer (kind-discriminated) |
| receipt | object | yes | Auditable receipt: inputs, timezone, convention, workweek, holiday calendar, exclusions, versions, stable result ID |
No examples provided.
next_occurrence Next occurrence of an event or weekday ~117
The next occurrence strictly after the base date (default today) of either a tracked event slug (e.g. "christmas") or a weekday (0 = Sunday .. 6 = Saturday). Provide exactly one of event/weekday.
| Name | Type | Req | Description |
|---|---|---|---|
| event | string | — | — |
| from | string | — | ISO date YYYY-MM-DD, or "today" (resolved in tz) |
| tz | string | — | IANA timezone that defines "today" (e.g. Africa/Kampala). Default UTC. |
| weekday | integer | — | — |
| Name | Type | Req | Description |
|---|---|---|---|
| answer | object | yes | The calculated answer (kind-discriminated) |
| receipt | object | yes | Auditable receipt: inputs, timezone, convention, workweek, holiday calendar, exclusions, versions, stable result ID |
No examples provided.
parse_date_query Parse a natural-language date question ~108
Parses queries like "90 business days from today in uganda" into a normalized operation, answers it, and returns the auditable receipt. Ambiguous dates (03/04/2027) return needsClarification instead of a guess.
| Name | Type | Req | Description |
|---|---|---|---|
| locale | string | — | Resolves ambiguous slash dates; omit to receive clarification choices |
| q | string | yes | — |
| tz | string | — | IANA timezone that defines "today" (e.g. Africa/Kampala). Default UTC. |
| Name | Type | Req | Description |
|---|---|---|---|
| answer | object | — | The calculated answer, absent when parsed is null |
| canonicalUrl | string|null | — | tilwhen page that answers this query, to cite; null when no page covers it |
| confidence | number | yes | 1.0 is a clean grammar hit; below 0.5 the query is refused rather than guessed |
| needsClarification | object | — | Present when the query is genuinely ambiguous (e.g. 03/04/2027); offers explicit choices instead of a guess |
| parsed | — | yes | Normalized operation, or null when the query could not be understood confidently |
| receipt | object | — | Auditable receipt, absent when parsed is null |
| warnings | array | yes | Machine-readable notes, e.g. unsupported_unit or time_ignored |
No examples provided.
subtract_days Subtract calendar days from a date ~72
The date N whole calendar days before a date.
| Name | Type | Req | Description |
|---|---|---|---|
| date | string | — | ISO date YYYY-MM-DD, or "today" (resolved in tz) |
| days | integer | yes | — |
| tz | string | — | IANA timezone that defines "today" (e.g. Africa/Kampala). Default UTC. |
| Name | Type | Req | Description |
|---|---|---|---|
| answer | object | yes | The calculated answer (kind-discriminated) |
| receipt | object | yes | Auditable receipt: inputs, timezone, convention, workweek, holiday calendar, exclusions, versions, stable result ID |
No examples provided.