The Market Calendar

tech.marketcalendarPublished by marketcalendar.techOfficial publisherv1.1.0Updated Oct 24, 2026

Seasonality by month for 9 markets, S&P 500 day by day this month, and US economic release dates.

VerifiedStreamable HTTPWeb executableProductivity & Workflow

Overview

The Market Calendar's hosted MCP server (marketcalendar.tech), published by marketcalendar.tech; no sign-in required; Streamable HTTP; 8 tools.

No AI overview yet: these facts come from the registry entry and the server itself.

Publisher
marketcalendar.tech
Endpoint
marketcalendar.tech
Last checked

Installation

In SourceWeft

  1. Open The Market Calendar in the dashboard and add it to a workspace.
  2. Enable the server for the chats that should use its tools.

Web executable via Streamable HTTP. Remote servers run from the web runtime once configured in a workspace.

Use with an agent

Paste this prompt into Claude Code, Codex, Cursor or another agent — or into SourceWeft chat. The agent reads this server's install guide, shows you its publisher, endpoint and sign-in, and adds it to your client once you agree. Keys never go into a command.

Read https://sourceweft.com/mcp/tech.marketcalendar%2Fseasonality/install.md and connect the MCP server it describes to my client. Before changing any config, show me its publisher, endpoint and sign-in method and wait for my OK. Never put an API key in a command or in a file I would commit; ask me where it should come from.

Read the install guide the agent follows

Other MCP clients

Add this to your client's mcpServers config.

{
  "mcpServers": {
    "the-market-calendar": {
      "type": "http",
      "url": "https://marketcalendar.tech/mcp"
    }
  }
}

Tools

8

list_assets

List assets

List the markets covered (S&P 500, Nasdaq, Nasdaq-100, Dow, Russell 2000, Bitcoin, Ethereum, Crude Oil, Gold) with their data start dates.

Takes no parameters.

monthly_seasonality

Seasonality by month

Average and median return, share of years up, best and worst year for each calendar month of an asset. Use for 'what's the best month for X', 'is September bad for stocks'.

Parametersassetrequired

month_detail

One month in detail

Deep dive on one month for one asset: average, median, % of years up, rank among the 12 months, recent years, the cumulative seasonal path through the month, and its strongest/weakest days.

Parametersassetrequiredmonthrequired

day_seasonality

One calendar day

How an asset has done on a calendar date across all years: average return, share of years up, rank among all days. Free for the S&P 500 in the current month; other assets/months return that month's free numbers and a Pro link (pro_required).

Parametersdaterequiredassetrequired

window_seasonality

A date window across the years

Every past year's return over a calendar window (start and end MM-DD), with average, median, % of years up, best and worst years. Free for S&P 500 windows inside the current month; otherwise returns the covered months' free numbers and a Pro link (pro_required).

Parametersendrequiredassetrequiredstartrequired

seasonal_pattern

Test a well-known pattern

Statistics for well-known S&P 500 calendar effects: santa-claus-rally, sell-in-may, september-effect, best-days-of-the-year, worst-days-of-the-year, turn-of-the-month, presidential-cycle, january-barometer, options-expiration, pre-holiday, day-of-the-week, midterm-year.

Parameterspatternrequired

economic_calendar

US economic releases

Scheduled US economic releases (FOMC, CPI, jobs, PCE, GDP, PPI, retail sales, ISM, JOLTS) in a date range, with US Eastern times.

Parametersdaysstart

Version history

2
  1. v1.1.0LatestOct 20, 2026
  2. v1.0.0Oct 18, 2026

Score

83% of the applicable checks met

How complete this listing is, computed from the registry entry, the endpoint and public sources. Not a rating of the server and not a statement that it is safe or working today: reachability is a dated check, and no installs or reviews go into the score.

  • Reached in the last 30 daysRequired25 pts
  • Auth declaredRequired10 pts
  • Tools listedRequired15 pts
  • DescriptionRequired15 pts
  • Logo10 pts
  • Documentation15 pts

    Declare a GitHub repository with a README, or serve resource_documentation in the OAuth protected-resource metadata.

  • LicenseNot applicable

    A hosted service is used under its provider's terms, so no license is expected here. This check is left out of the percentage.