Market Hours Skill

Overview

Stock Market Open Times works by querying a large database of stock market open times to retrieve the open times for each day of the week. It returns the stock market open times in a structured format.

Live Test Market Hours Skill Skill →

The tool

Once your client is connected to the VerveKit server, this appears in its tool list as MarketHoursSkill. It is read-only and open-world — it fetches and never mutates anything on your side — so most clients call it without asking you to confirm.

Tool call

{
  "name": "MarketHoursSkill",
  "arguments": {
    "exchange": "NYSE"
  }
}

You do not name the tool yourself; the model picks it. Asking about NYSE in the terms this skill covers is enough for it to reach for MarketHoursSkill on its own — naming it explicitly also works, and is the way to force the call.

Connecting

One server URL covers every skill in the catalog, including this one. Authorization is OAuth: the client opens a browser once, and there is no key to paste into a config file.

{
  "mcpServers": {
    "vervekit": {
      "url": "https://api.vervekit.com/v1/mcp"
    }
  }
}

Per-client setup — Claude, Cursor, VS Code, ChatGPT — is on the MCP setup page.

Arguments

These are the properties on the tool's inputSchema, so a well-behaved client validates them before the call is made. Premium arguments are accepted on every plan but only take effect on plans that include them.

Argument	Type	Description
`exchange`Required	string	The stock exchange code `NYSENASDAQBATSCHXPHLXAMEXARCAISE`+33

What the model gets back

The result carries a structuredContent object matching the tool's declared outputSchema, so a client reads fields without parsing prose. status is "ok" and error is null on success; a null field means the value was not available for that input, not that the call failed.

Result

{
  "status": "ok",
  "error": null,
  "data": {
    "timezone": "America/New_York",
    "exchange": "NYSE",
    "fullName": "New York Stock Exchange",
    "isOpen": false,
    "openingTime": "2025-12-16 09:30:00",
    "closingTime": "2025-12-16 16:00:00"
  }
}

Response fields

Paths are relative to data. Premium fields are absent rather than zeroed on plans that do not include them, so check for presence instead of comparing to 0.

Field	Type	Example	Description
`timezone`Premium	string	`America/New_York`	Timezone of the stock exchange location
`exchange`	string	`NYSE`	Stock exchange code or identifier
`fullName`	string	`New York Stock Exchange`	Complete official name of the stock exchange
`isOpen`	boolean	`false`	Whether the stock market is currently open
`openingTime`	string	`2025-12-16 09:30:00`	Market opening time in datetime format
`closingTime`	string	`2025-12-16 16:00:00`	Market closing time in datetime format

Failure modes

Errors come back as tool errors carrying a sentence the model can act on, not a bare status code. Error handling covers the full list.

Status	What it means
`400` / `422`	The arguments did not validate. The message names the offending one.
`401`	The OAuth session is invalid or expired — reconnect the server.
`403`	Blocked by a key restriction or an IP allow-list. Never a bad identity.
`404`	This skill is not part of VerveKit. Check the catalog.
`429`	Out of credits, or a brief rate limit. The message tells them apart.

A call costs 2 credits each time the tool actually runs; a model that reasons about the tool without calling it costs nothing.

Use cases

Order Execution Routing: Brokerage systems verify whether a destination market is currently open before queuing or routing limit orders for immediate execution.
Portfolio Dashboard Badges: Financial charting widgets display green or red market status indicators next to asset prices based on the exchange open flag.
Pre-Market Notification Triggers: To alert day traders about upcoming sessions, mobile push services check scheduled opening times and send reminders fifteen minutes prior.
Cross-Border Arbitrage Bots: Algorithmic trading scripts compare overlapping operational hours across international venues like the LSE and NYSE to coordinate hedged positions.

Other ways to use Market Hours Skill

Set up Market Hours Skill on VerveKit, or reach the same source a different way. Your VerveKit account and credits work on all of them — one key, one balance.

Call it as a REST APIOne HTTPS endpoint and an x-api-key header, with SDKs for Node, Python and .NET.APIVerve →Reference →

Google Sheets or ExcelA =VERVE() formula fills a column — no script, no export, recalculates in place.VerveSheets →Reference →

Ground an agent on itA cited, machine-checkable fact your model can't produce on its own.VerveContext →Reference →