Market Calendar API

Name: Market Calendar API service
Creator: Agent GDP
License: https://creativecommons.org/licenses/by/4.0/

The service's listing describes it this way: Returns the next VIX futures and options expiration dates (Wednesday rule, holiday-adjusted). Website

A service is a tool an AI agent pays to call. Market Calendar API is listed on this page under Other, settling on Base, through x402. 30-day settled volume on this page is $0.01. The listing comes from the service catalog. Open a row for payments, payers, and chains. See Bazaar, agent payment use cases, and the methodology.

FacilitatorsCoinbase

Payee

0xc577…7d23Base

Methodology · settled volume through 2026-10-26 · catalog Oct 26, 2026, 2:02 PM UTC

Settled volume, payments, payers, average payment, use-case share, and rank
Metric	24h	7d	30d
Volume	$0.00	$0.01	$0.01
Payments	0	1	1
Payers	0	1	1
Avg payment	$0.00	$0.011	$0.011
Share of Other	—	0.0%	0.0%
Use-case rank	—	#376	#386

Payers can be counted more than once when they paid through more than one facilitator.

Settled volume

$0.01

n/a

Payments

Payers

Avg payment

$0.011

volume / payments

Daily volume and buyers

90D 1Y All

Data through Oct 26, 2026. Source: public settlement logs. Methodology

Payers

Buyer concentration

100.0%

Top payer's share of lifetime volume. Not the period selected above.

Repeat buyers

0.0%

Lifetime buyers with more than one payment, divided by all buyers.

Endpoints and prices

Price, network, and asset come from the x402 Bazaar catalog.

Endpoint	Network	Asset	Price	Scheme
https://market-calendar-api.onrender.com/v1/vix-expiry Returns the next VIX futures and options expiration dates (Wednesday rule, holiday-adjusted).	base	USDC	$0.01	exact
https://market-calendar-api.onrender.com/v1/opex Tells whether a date is a US monthly options expiration, triple witching, weekly expiration, VIX expiration or Eurex expiration (holiday-adjusted), and returns the next ones.	base	USDC	$0.01	exact
https://market-calendar-api.onrender.com/v1/opex-calendar Returns all monthly options expiration dates of a year for US equity options, VIX and Eurex, holiday-adjusted, with triple witching flags.	base	USDC	$0.01	exact
https://market-calendar-api.onrender.com/v1/releases Lists scheduled US economic releases (CPI, NFP, PPI, GDP, PCE) in a date range with times in ET and UTC.	base	USDC	$0.011	exact
https://market-calendar-api.onrender.com/v1/auctions Lists US Treasury auctions (bills, notes, bonds, TIPS, FRNs) in a date range: announced upcoming auctions and results of past ones (high yield/rate, bid-to-cover).	base	USDC	$0.0013	exact
https://market-calendar-api.onrender.com/v1/banking-holidays Lists the banking/settlement holidays of a year for TARGET2 (euro), US Fedwire or Switzerland (SIX).	base	USDC	$0.0014	exact
https://market-calendar-api.onrender.com/v1/is-banking-day Tells whether a date is a banking/settlement day for euro payments (TARGET2/SEPA), US Fedwire or Switzerland (SIX), with the reason and the next banking day.	base	USDC	$0.0014	exact
https://market-calendar-api.onrender.com/v1/meetings Lists all Fed (FOMC) and ECB monetary policy meetings of a year with decision and press conference times.	base	USDC	$0.0012	exact
https://market-calendar-api.onrender.com/v1/next-auction Returns the next announced US Treasury auction, optionally for a term such as 2-Year or 13-Week.	base	USDC	$0.0013	exact
https://market-calendar-api.onrender.com/v1/next-meeting Returns the next Federal Reserve (FOMC) and/or ECB monetary policy decision with statement and press conference times in local time and UTC, and whether projections are published.	base	USDC	$0.0012	exact
https://market-calendar-api.onrender.com/v1/next-release Returns the next scheduled release of a US economic indicator (CPI, NFP, PPI, GDP, PCE) with exact time in ET and UTC and the reference period, from official BLS/BEA calendars.	base	USDC	$0.0011	exact
https://market-calendar-api.onrender.com/v1/rebalance Returns index rebalancing and reconstitution dates (S&P 500, Nasdaq-100, Russell US semi-annual, DAX reviews) for a year: effective-after-close date and first trading day with new weights.	base	USDC	$0.002	exact

Facilitators used

Facilitator	Volume	Tx	Share
Coinbasex402	$0.01	1	100.0%

Other services in Other

All in this use case

pay.lnpay.ai#1 · $2.09K 30d
StableStudio#2 · $104.18 30d
Pocket Network#3 · $80.06 30d
SolEnrich#4 · $49.36 30d
AgentUtility.ai#5 · $42.79 30d

How we count Market Calendar API

We read settlements directly from each chain's public records and refresh them every few minutes.

Data through 2026-10-26. Source: public settlement logs.

Full methodology → · How we compare with other trackers →

Cite this

APA

Agent GDP. (2026). Market Calendar API [Data set]. Retrieved October 26, 2026, from https://agentgdp.io/service/market-calendar-api.onrender.com.

MLA

"Market Calendar API." Agent GDP, 26 Oct. 2026, https://agentgdp.io/service/market-calendar-api.onrender.com.

BibTeX

@misc{agentgdp_market_calendar_api_2026,
  author = {{Agent GDP}},
  title = {Market Calendar API},
  year = {2026},
  url = {https://agentgdp.io/service/market-calendar-api.onrender.com},
  note = {Retrieved October 26, 2026. Data through 2026-10-26. Licensed under CC BY 4.0.},
  license = {https://creativecommons.org/licenses/by/4.0/}
}

Plain text

Market Calendar API: $0.01 settled volume (7d), 1 payments, 1 buyers. Agent GDP, data through 2026-10-26. https://agentgdp.io/service/market-calendar-api.onrender.com Retrieved October 26, 2026.

Data from Agent GDP (https://agentgdp.io/service/market-calendar-api.onrender.com), licensed under CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/).

Payers on a day can be counted more than once if they paid through more than one facilitator. Growth compares this period with the previous period of the same length. The page link uses the service's site when we have one, and the payee address otherwise.

Volume and payment counts include earlier days. Transaction-level detail available from October 23, 2026.

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HTML

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Cite this

APA

Agent GDP. (2026). Service settled volume [Data set]. Retrieved October 26, 2026, from https://agentgdp.io/service/market-calendar-api.onrender.com.

MLA

"Service settled volume." Agent GDP, 26 Oct. 2026, https://agentgdp.io/service/market-calendar-api.onrender.com.

BibTeX

@misc{agentgdp_service_settled_volume_2026,
  author = {{Agent GDP}},
  title = {Service settled volume},
  year = {2026},
  url = {https://agentgdp.io/service/market-calendar-api.onrender.com},
  note = {Retrieved October 26, 2026. Licensed under CC BY 4.0.},
  license = {https://creativecommons.org/licenses/by/4.0/}
}

Plain text

Service settled volume. Agent GDP. https://agentgdp.io/service/market-calendar-api.onrender.com. Retrieved October 26, 2026.

Data from Agent GDP (https://agentgdp.io/service/market-calendar-api.onrender.com), licensed under CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/).

Time	Daily settled volume for Market Calendar API
2026-10-23	$0.01
2026-10-24	$0.00
2026-10-25	$0.00
2026-10-26	$0.00