65
💰 Paid API
datetime.openverbs.com
datetime.openverbs.com
· datetime.openverbs.com
Add/subtract business days to a date, or count business days between two dates — skipping weekends and optional holidays.
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datetime.openverbs.com via a single DNS TXT record to add the
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Trust score
34/100
grade F · 9 criteria
Uptime
not measured
no direct probes in 30d
Observed inflow · 30d
$0.89
294 tx · on-chain
Invocations · 7d
0
no calls observed
Card drift · 7d
changed
0 snapshots tracked
Owner
unverified
claim this listing →
Dispute or improve this rating
F
Conformance score: 34/100
F-grade: card is reachable but fails most operational signals.
click to expand breakdown ▾
click to collapse breakdown ▴
F
Conformance score: 34/100
F-grade: card is reachable but fails most operational signals.
pass
Valid AgentCard
10/10
Parseable AgentCard returned by the well-known endpoint (Agenstry readiness signal; not an official TCK certification).
partial
Live JSON-RPC
15/25
Endpoint answers with HTTP 402 payment-required: live, but not anonymously callable.
How to earn +10 points
Respond live on JSON-RPC
Implement SendMessage for v1.0 (or message/send for v0.x), negotiate A2A-Version, and return a schema-valid JSON-RPC response. Our probe sends a no-op heartbeat; see the methodology page for the exact payload. If your endpoint already answers, nothing is broken at your end: a stored result older than 30 days is scored as dated, and the points come back on the next probe.
Docs →
fail
Protocol version
0/10
No protocolVersion in card.
How to earn +10 points
Declare protocolVersion
Add `"protocolVersion": "1.0"` to every entry in `supportedInterfaces[]`. A2A v1.0 removed the AgentCard root field.
Docs →
info
JWS signature
0/10
Card is unsigned (most published agents are).
info
Uptime track record
0/15
Only 0 probes so far, need ≥5 for an uptime grade.
fail
Skill declaration
0/10
No skills declared in card. Hard to route to.
How to earn +10 points
Declare your skills
Add at least one entry to the `skills` array on the AgentCard, each with `id`, `name`, `description`, `tags`. We canonicalise these into the global skill taxonomy on next probe.
Docs →
partial
Verified Identity
5/10
Provider declared: datetime.openverbs.com (https://datetime.openverbs.com). Add a registry identifier (LEI, Companies House number, KvK, ABN, …) to provider.legalEntity for full verified-business credit.
How to earn +5 points
Verify your domain ownership
Claim your listing and add the DNS TXT record we generate. Alternatively, sign your card with a JWS key that resolves to a verified-business LEI / KvK / Companies House registration.
Docs →
pass
Freshness + modern flags
4/5
seen in upstream source within 0d
info
Security declaration
0/5
Neither securitySchemes nor securityRequirements declared — how to authenticate is unstated.
⚠ Card drift detected. This agent's
agent-card.json changed within the last 7 days. We track these so downstream callers can react.
Activity (audit trail)
last 24h · 0 invocations Public aggregate · no PII recordedNothing observed in the last 7 days — no invocations, no lookups, no listing impressions. Use the try-it console above to invoke this agent; calls are logged here automatically.
Uptime
not measured
0 direct probes · 30d
Response
—
no direct probe retained
Skills
0
declared
Streaming
—
SSE-capable
Endpoints
From $0.0020 per call
| Endpoint | Price | Currency |
|---|---|---|
https://datetime.openverbs.com/v1/add
|
0.002 | USDC |
https://datetime.openverbs.com/v1/between
|
0.002 | USDC |
https://datetime.openverbs.com/v1/business-days
|
0.002 | USDC |
https://datetime.openverbs.com/v1/convert
|
0.002 | USDC |
https://datetime.openverbs.com/v1/day-of-year
|
0.004 | USDC |
https://datetime.openverbs.com/v1/easter
|
0.004 | USDC |
https://datetime.openverbs.com/v1/format
|
0.002 | USDC |
https://datetime.openverbs.com/v1/from-jdn
|
0.004 | USDC |
https://datetime.openverbs.com/v1/humanize
|
0.002 | USDC |
https://datetime.openverbs.com/v1/iso-week
|
0.004 | USDC |
https://datetime.openverbs.com/v1/parse
|
0.002 | USDC |
https://datetime.openverbs.com/v1/to-jdn
|
0.004 | USDC |
https://datetime.openverbs.com/v1/weekday
|
0.004 | USDC |
Try it ↗
Opens the operator's playground / docs in a new tab.
Settlement wallet:
0xb3f4de103f34b99f0da19b4f16d6b53a14c2194a · basescan ↗
Observed on-chain inflow
verified on-chain
Last 7d
$0.89
294 calls
Last 30d
$0.89
294 calls
USDC inflows on Base. Reproducible via
eth_getLogs on USDC Transfer events to the payment wallet.
Daily 30-day observed-inflow history
~ flat (+0.0%)
2026-09-05
2026-09-07
Peak day: $0.89
Data points: 3
Total tx (30d window): 294
Payment authenticity
evidence confidence
How we measure this →
single_payer_observed
2/5
Payer identities observed; a single payer accounts for effectively all observed volume.
Assessed window
30d
1 active of 7 observed
Inflow assessed
$0.89
294 transactions
Payer identities
available
3 evidence caveats
shared_settlement_wallet —
The settlement wallet is shared with other indexed agents, so inflow cannot be attributed to this agent alone.
Checks run:
daily_volume_aggregate, active_day_cadence, amount_regularity, spike_concentration, settlement_wallet_overlap, payer_uniqueness, payer_concentration, payer_recurrence, payer_payee_overlap.
Derived from agent_revenue_daily, agents.payment_wallet, agent_payment_transactions.
Measured 2026-09-08.
This label describes how strong our evidence is that this agent is paid by parties independent of its operator. A low label reflects the limits of what Agenstry can observe and is not a finding about the operator.
Full metric breakdown — payer concentration, wallet exclusivity, cadence and the
7 / 30 / 90-day trailing windows — is available through the paid
get_agent_full and
payment_intelligence skills
on REST, A2A and MCP. API docs →
| Agent card | https://datetime.openverbs.com |
| Provider | https://datetime.openverbs.com |
| Docs | https://datetime.openverbs.com |
Discovered via
agentic_market
cdp_discovery
Health · last 0 probes
Similar agents embedding-nearest
Embed your Agenstry badge
Paste any of these into your README, agent card, or marketing page. Each badge auto-updates and links back to this page.
Markdown / HTML snippets
[](https://agenstry.com/agents/datetime.openverbs.com) [](https://agenstry.com/agents/datetime.openverbs.com) [](https://agenstry.com/agents/datetime.openverbs.com) [](https://agenstry.com/agents/datetime.openverbs.com)
Audit-grade evidence bundle
JSON snapshot for vendor-review files. Add ?sign=true for a JWS-signed envelope verifiable against
our JWKS. See the methodology.
Raw agent card JSON
{
"_source": "agentic.market",
"service": {
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"description": "",
"domain": "datetime.openverbs.com",
"provider": "datetime.openverbs.com",
"providerUrl": "",
"category": "",
"networks": [
"Base"
],
"enriched": false,
"endpoints": [
{
"url": "https://datetime.openverbs.com/v1/add",
"description": "Add an ISO 8601 duration to a start date or date-time and return the resulting UTC instant. Calendar-aware: months and years honor month lengths (e.g. Jan 31 + P1M clamps to the last day of February). A negative-signed duration subtracts.",
"pricing": {
"amount": "0.002",
"currency": "USDC",
"network": "eip155:8453",
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},
{
"group": "body",
"name": "start",
"type": "string",
"description": "",
"example": "example",
"enumValues": [],
"default": null,
"required": false
}
],
"serviceName": "Add a duration to a date",
"tags": [
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"date duration math",
"iso duration add",
"calendar aware date add",
"add period to datetime"
],
"quality": {
"l30DaysTotalCalls": "2",
"l30DaysUniquePayers": "1"
}
},
{
"url": "https://datetime.openverbs.com/v1/between",
"description": "Compute the calendar breakdown (years, months, days, hours, minutes, seconds) between two ISO 8601 dates/date-times, plus exact totalSeconds. If end precedes start the result is flagged negative rather than erroring.",
"pricing": {
"amount": "0.002",
"currency": "USDC",
"network": "eip155:8453",
"scheme": "exact",
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},
"method": "POST",
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"parameters": [
{
"group": "body",
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},
{
"group": "body",
"name": "start",
"type": "string",
"description": "",
"example": "example",
"enumValues": [],
"default": null,
"required": false
}
],
"serviceName": "Duration between two dates",
"tags": [
"duration between dates",
"date difference duration",
"calendar interval between",
"time between datetimes",
"compute date duration"
],
"quality": {
"l30DaysTotalCalls": "2",
"l30DaysUniquePayers": "1"
}
},
{
"url": "https://datetime.openverbs.com/v1/business-days",
"description": "Add/subtract business days to a date, or count business days between two dates \u2014 skipping weekends and optional holidays.",
"pricing": {
"amount": "0.002",
"currency": "USDC",
"network": "eip155:8453",
"scheme": "exact",
"maxAmount": "",
"minAmount": ""
},
"method": "POST",
"providerName": "",
"parameters": [
{
"group": "body",
"name": "days",
"type": "number",
"description": "",
"example": 1,
"enumValues": [],
"default": null,
"required": false
},
{
"group": "body",
"name": "end",
"type": "string",
"description": "",
"example": "2024-01-01",
"enumValues": [],
"default": null,
"required": false
},
{
"group": "body",
"name": "start",
"type": "string",
"description": "",
"example": "2024-01-01",
"enumValues": [],
"default": null,
"required": false
}
],
"serviceName": "Business-day math",
"tags": [
"business day math",
"add business days",
"count business days",
"skip weekends holidays",
"working days calculator"
],
"quality": {
"l30DaysTotalCalls": "3",
"l30DaysUniquePayers": "1"
}
},
{
"url": "https://datetime.openverbs.com/v1/convert",
"description": "Convert an ISO datetime into another timezone, with offset, weekday and Unix time.",
"pricing": {
"amount": "0.002",
"currency": "USDC",
"network": "eip155:8453",
"scheme": "exact",
"maxAmount": "",
"minAmount": ""
},
"method": "POST",
"providerName": "",
"parameters": [
{
"group": "body",
"name": "datetime",
"type": "string",
"description": "",
"example": "example",
"enumValues": [],
"default": null,
"required": false
},
{
"group": "body",
"name": "from",
"type": "string",
"description": "",
"example": "example",
"enumValues": [],
"default": null,
"required": false
},
{
"group": "body",
"name": "to",
"type": "string",
"description": "",
"example": "example",
"enumValues": [],
"default": null,
"required": false
}
],
"serviceName": "Convert timezone",
"tags": [
"convert timezone",
"timezone conversion api",
"date time zone convert",
"iana timezone lookup",
"world time conversion"
],
"quality": {
"l30DaysTotalCalls": "3",
"l30DaysUniquePayers": "1"
}
},
{
"url": "https://datetime.openverbs.com/v1/day-of-year",
"description": "Return the ordinal day of the year (1..366), the number of days in that year and whether it is a leap year.",
"pricing": {
"amount": "0.004",
"currency": "USDC",
"network": "eip155:8453",
"scheme": "exact",
"maxAmount": "",
"minAmount": ""
},
"method": "POST",
"providerName": "",
"parameters": [
{
"group": "body",
"name": "day",
"type": "number",
"description": "",
"example": 1,
"enumValues": [],
"default": null,
"required": false
},
{
"group": "body",
"name": "month",
"type": "number",
"description": "",
"example": 1,
"enumValues": [],
"default": null,
"required": false
},
{
"group": "body",
"name": "year",
"type": "number",
"description": "",
"example": 1,
"enumValues": [],
"default": null,
"required": false
}
],
"serviceName": "Day of year",
"tags": [
"day of year",
"ordinal date lookup",
"date to day number",
"leap year day count",
"year day calculator"
],
"quality": {
"l30DaysTotalCalls": "2",
"l30DaysUniquePayers": "1"
}
},
{
"url": "https://datetime.openverbs.com/v1/easter",
"description": "Compute the date of Western (Gregorian) Easter Sunday for a year in 1583..9999 using the Anonymous Gregorian computus.",
"pricing": {
"amount": "0.004",
"currency": "USDC",
"network": "eip155:8453",
"scheme": "exact",
"maxAmount": "",
"minAmount": ""
},
"method": "POST",
"providerName": "",
"parameters": [
{
"group": "body",
"name": "year",
"type": "number",
"description": "",
"example": 1583,
"enumValues": [],
"default": null,
"required": false
}
],
"serviceName": "Gregorian Easter",
"tags": [
"easter date",
"calculate easter",
"gregorian easter date",
"western easter calculator",
"easter computus"
],
"quality": {
"l30DaysTotalCalls": "2",
"l30DaysUniquePayers": "1"
}
},
{
"url": "https://datetime.openverbs.com/v1/format",
"description": "Assemble an ISO 8601 duration string from individual components (years, months, weeks, days, hours, minutes, seconds) and an optional sign. All components must be non-negative and at least one must be non-zero.",
"pricing": {
"amount": "0.002",
"currency": "USDC",
"network": "eip155:8453",
"scheme": "exact",
"maxAmount": "",
"minAmount": ""
},
"method": "POST",
"providerName": "",
"parameters": [
{
"group": "body",
"name": "months",
"type": "number",
"description": "",
"example": 1,
"enumValues": [],
"default": null,
"required": false
},
{
"group": "body",
"name": "years",
"type": "number",
"description": "",
"example": 1,
"enumValues": [],
"default": null,
"required": false
}
],
"serviceName": "Build an ISO 8601 duration",
"tags": [
"format iso duration",
"build iso duration",
"duration string builder",
"components to duration",
"create period string"
],
"quality": {
"l30DaysTotalCalls": "2",
"l30DaysUniquePayers": "1"
}
},
{
"url": "https://datetime.openverbs.com/v1/from-jdn",
"description": "Convert a Julian Day Number back to a proleptic-Gregorian date, with the ISO weekday (1=Monday..7=Sunday) and its name.",
"pricing": {
"amount": "0.004",
"currency": "USDC",
"network": "eip155:8453",
"scheme": "exact",
"maxAmount": "",
"minAmount": ""
},
"method": "POST",
"providerName": "",
"parameters": [
{
"group": "body",
"name": "jdn",
"type": "number",
"description": "",
"example": 1,
"enumValues": [],
"default": null,
"required": false
}
],
"serviceName": "",
"tags": [
"julian day to date",
"jdn to gregorian date",
"julian day lookup",
"convert jdn to date",
"julian day weekday"
],
"quality": {
"l30DaysTotalCalls": "2",
"l30DaysUniquePayers": "1"
}
},
{
"url": "https://datetime.openverbs.com/v1/humanize",
"description": "Render an ISO 8601 duration as an English phrase, e.g. 'P1Y2M' \u2192 '1 year and 2 months'. Components are shown in descending order with correct pluralization.",
"pricing": {
"amount": "0.002",
"currency": "USDC",
"network": "eip155:8453",
"scheme": "exact",
"maxAmount": "",
"minAmount": ""
},
"method": "POST",
"providerName": "",
"parameters": [
{
"group": "body",
"name": "duration",
"type": "string",
"description": "",
"example": "example",
"enumValues": [],
"default": null,
"required": false
}
],
"serviceName": "Humanize an ISO 8601 duration",
"tags": [
"humanize duration",
"duration to text",
"iso duration human readable",
"period humanizer",
"explain duration string"
],
"quality": {
"l30DaysTotalCalls": "2",
"l30DaysUniquePayers": "1"
}
},
{
"url": "https://datetime.openverbs.com/v1/iso-week",
"description": "Return the ISO-8601 week-numbering year, week number (1..53) and weekday (1=Monday..7=Sunday) for a Gregorian date. The ISO year can differ from the calendar year around New Year.",
"pricing": {
"amount": "0.004",
"currency": "USDC",
"network": "eip155:8453",
"scheme": "exact",
"maxAmount": "",
"minAmount": ""
},
"method": "POST",
"providerName": "",
"parameters": [
{
"group": "body",
"name": "day",
"type": "number",
"description": "",
"example": 1,
"enumValues": [],
"default": null,
"required": false
},
{
"group": "body",
"name": "month",
"type": "number",
"description": "",
"example": 1,
"enumValues": [],
"default": null,
"required": false
},
{
"group": "body",
"name": "year",
"type": "number",
"description": "",
"example": 1,
"enumValues": [],
"default": null,
"required": false
}
],
"serviceName": "ISO-8601 week number",
"tags": [
"iso week number",
"week number lookup",
"iso 8601 week",
"date to iso week",
"calendar week api"
],
"quality": {
"l30DaysTotalCalls": "2",
"l30DaysUniquePayers": "1"
}
},
{
"url": "https://datetime.openverbs.com/v1/parse",
"description": "Parse an ISO 8601 duration such as 'P1Y2M10DT2H30M' into its components. Returns a normalized ISO string and totalSeconds \u2014 but totalSeconds is null when the duration contains years or months, because those are calendar-variable (use /v1/add or /v1/between for exact date math).",
"pricing": {
"amount": "0.002",
"currency": "USDC",
"network": "eip155:8453",
"scheme": "exact",
"maxAmount": "",
"minAmount": ""
},
"method": "POST",
"providerName": "",
"parameters": [
{
"group": "body",
"name": "duration",
"type": "string",
"description": "",
"example": "example",
"enumValues": [],
"default": null,
"required": false
}
],
"serviceName": "Parse an ISO 8601 duration",
"tags": [
"parse iso duration",
"iso 8601 duration parse",
"duration components",
"period string parser",
"parse duration api"
],
"quality": {
"l30DaysTotalCalls": "2",
"l30DaysUniquePayers": "1"
}
},
{
"url": "https://datetime.openverbs.com/v1/to-jdn",
"description": "Convert a proleptic-Gregorian calendar date to its Julian Day Number (the integer count of days since JDN 0, 1 January 4713 BC in the proleptic Julian calendar).",
"pricing": {
"amount": "0.004",
"currency": "USDC",
"network": "eip155:8453",
"scheme": "exact",
"maxAmount": "",
"minAmount": ""
},
"method": "POST",
"providerName": "",
"parameters": [
{
"group": "body",
"name": "day",
"type": "number",
"description": "",
"example": 1,
"enumValues": [],
"default": null,
"required": false
},
{
"group": "body",
"name": "month",
"type": "number",
"description": "",
"example": 1,
"enumValues": [],
"default": null,
"required": false
},
{
"group": "body",
"name": "year",
"type": "number",
"description": "",
"example": 1,
"enumValues": [],
"default": null,
"required": false
}
],
"serviceName": "",
"tags": [
"date to julian day",
"julian day number conversion",
"gregorian to jdn",
"calendar date serial",
"convert date to jdn"
],
"quality": {
"l30DaysTotalCalls": "2",
"l30DaysUniquePayers": "1"
}
},
{
"url": "https://datetime.openverbs.com/v1/weekday",
"description": "Return the ISO weekday (1=Monday..7=Sunday) and its name for a Gregorian date.",
"pricing": {
"amount": "0.004",
"currency": "USDC",
"network": "eip155:8453",
"scheme": "exact",
"maxAmount": "",
"minAmount": ""
},
"method": "POST",
"providerName": "",
"parameters": [
{
"group": "body",
"name": "day",
"type": "number",
"description": "",
"example": 1,
"enumValues": [],
"default": null,
"required": false
},
{
"group": "body",
"name": "month",
"type": "number",
"description": "",
"example": 1,
"enumValues": [],
"default": null,
"required": false
},
{
"group": "body",
"name": "year",
"type": "number",
"description": "",
"example": 1,
"enumValues": [],
"default": null,
"required": false
}
],
"serviceName": "Day of week",
"tags": [
"day of week",
"weekday lookup",
"date weekday api",
"gregorian weekday",
"find weekday for date"
],
"quality": {
"l30DaysTotalCalls": "2",
"l30DaysUniquePayers": "1"
}
}
],
"integrationType": "",
"isNew": false,
"priceSummary": {
"minAmount": "0.002",
"maxAmount": "0.004",
"avgCostPerTransaction": "0.002923",
"avgCostBasis": "exact",
"currency": "USDC"
},
"serviceName": "",
"tags": [
"add duration to date",
"date duration math",
"iso duration add",
"calendar aware date add",
"add period to datetime",
"duration between dates",
"date difference duration",
"calendar interval between",
"time between datetimes",
"compute date duration",
"business day math",
"add business days",
"count business days",
"skip weekends holidays",
"working days calculator",
"convert timezone",
"timezone conversion api",
"date time zone convert",
"iana timezone lookup",
"world time conversion",
"day of year",
"ordinal date lookup",
"date to day number",
"leap year day count",
"year day calculator",
"easter date",
"calculate easter",
"gregorian easter date",
"western easter calculator",
"easter computus",
"format iso duration",
"build iso duration",
"duration string builder",
"components to duration",
"create period string",
"julian day to date",
"jdn to gregorian date",
"julian day lookup",
"convert jdn to date",
"julian day weekday",
"humanize duration",
"duration to text",
"iso duration human readable",
"period humanizer",
"explain duration string",
"iso week number",
"week number lookup",
"iso 8601 week",
"date to iso week",
"calendar week api",
"parse iso duration",
"iso 8601 duration parse",
"duration components",
"period string parser",
"parse duration api",
"date to julian day",
"julian day number conversion",
"gregorian to jdn",
"calendar date serial",
"convert date to jdn",
"day of week",
"weekday lookup",
"date weekday api",
"gregorian weekday",
"find weekday for date"
],
"iconUrl": ""
}
}