Grassy Knees

io.github.grassykneesPublished by GitHub account grassykneesv0.2.0Updated Oct 29, 2026

Real, source-checked kids' events and places in 42 US metros, linked to grassyknees.com.

VerifiedSTDIODesktop onlyLocation & LifestyleWeb Search & Scraping

Overview

AI-generated overview

Read-only MCP server that lets an assistant find source-checked kids' events, classes and places in 42 US metros from the Grassy Knees directory.

What you can do
  • List the 42 covered metro areas with the ids used by the other tools
  • Search one metro's listings by date window, kind, free-only, age, category or keywords, soonest first
  • Fetch a single listing by its grassyknees.com URL or id for schedule, venue and ages
  • Pull a seasonal guide (Halloween, Christmas, ice skating, Easter) for a metro or all metros as trimmed Markdown
When to use it
Useful when someone asks what to do with kids in a US metro — weekend plans, free activities, age-specific events, seasonal outings — and you want real listings with dates and locations rather than generic suggestions.
Requirements
Runs locally over stdio via npx with Node.js 20 or later, or as a Docker image; no API key or account needed. Network access to grassyknees.com is required; the optional GRASSYKNEES_ORIGIN variable points it at another deployment.
Before you install
Read-only: it queries public endpoints and writes nothing to the site. Results are capped at 20 per call and cached for 10 minutes, and price, availability and registration details live on the linked listing page, so those should be checked there before relying on them.

Installation

In SourceWeft

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

Desktop only via STDIO. STDIO servers start a local process, so they need the SourceWeft desktop host.

Other MCP clients

Follow the launch instructions in the repository.

README

Grassy Knees MCP server

Website: https://grassyknees.com

A small, read-only Model Context Protocol server that lets AI assistants answer questions like "what can I do with my kids in Denver this weekend?" with real listings from Grassy Knees. Grassy Knees is a free directory of kids' and family events, classes and places across 42 US metro areas. Every listing is researched from the organizer's own page and shows the date it was last checked.

Every result says what the listing is, where and when, ages, and its grassyknees.com page URL. Price, availability, the last-checked date, registration, the organizer's links and contact details are on that page. Each call returns at most 20 listings.

Example prompts

Install

Requires Node.js 20 or later. No API key needed.

Claude Desktop

Add this to claude_desktop_config.json (Settings → Developer → Edit Config):

json
{  "mcpServers": {    "grassyknees": {      "command": "npx",      "args": ["-y", "grassyknees-mcp"]    }  }}

Claude Code

sh
claude mcp add grassyknees -- npx -y grassyknees-mcp

Cursor

Add this to ~/.cursor/mcp.json (or .cursor/mcp.json in a project):

json
{  "mcpServers": {    "grassyknees": {      "command": "npx",      "args": ["-y", "grassyknees-mcp"]    }  }}

Any other MCP client that runs stdio servers works the same way: the command is npx -y grassyknees-mcp.

Or with Docker: build the image with docker build -t grassyknees-mcp . and use docker run -i --rm grassyknees-mcp as the command.

Tools

ToolWhat it does
list_metrosThe 42 metro areas covered, with the id to pass to other tools (for example denver, new-york, washington-dc, dallas-fort-worth) and each metro's page URL.
search_activitiesSearch one metro. Filters: when (today, tomorrow, this-weekend, next-7-days, next-30-days) or start_date/end_date, kind (event, program, place, any), free_only, age, category, query (keywords), limit (1–20, default 10). Soonest first.
get_activityOne listing from its grassyknees.com URL or id: schedule, upcoming dates, venue, ages and its page URL.
seasonal_guideThe Halloween, Christmas (lights and holiday events), ice skating or Easter guide for a metro, or the all-metros overview, as Markdown trimmed to max_chars (default 8,000).

Dates are in the metro's local time. this-weekend means Friday to Sunday, the same window as the site's /<metro>/this-weekend page.

Sample transcript

From npm run smoke, run against the live site on 2026-10-28 (trimmed):

tools: list_metros, search_activities, get_activity, seasonal_guide
=== search_activities {"metro":"denver","when":"this-weekend","limit":3}60 events in Denver for this weekend (2026-10-30 to 2026-11-01); showing the first 3:
1. **[School's Out! Day: Pumpkins & Potions](https://grassyknees.com/denver/activities/school-s-out-day-pumpkins-and-potions--listing-023a33783babb5880fc24e03)**   Fri, Oct 30 · 8:30 AM–3:30 PM · JCC Denver (Staenberg-Loup Jewish Community Center), 350 S. Dahlia St., Denver, CO 80246   Ages 5+ · Arts & crafts
2. **[Rock Creek Farm Pumpkin Patch and Corn Maze](https://grassyknees.com/denver/activities/rock-creek-farm-pumpkin-patch-and-corn-maze--listing-69c7739ea9ac9cfaddb69622)**   Fri, Oct 30 · 9:30 AM–7:00 PM (also other dates) · Rock Creek Farm, 2005 S 112th St., Broomfield, CO 80020   Farm admission applies to ages 4 & up · Outdoors
3. **[JTML Hoppy Halloween Storytime](https://grassyknees.com/denver/activities/jtml-hoppy-halloween-storytime--listing-5ee8642f996422fe0023e407)**   Fri, Oct 30 · 10:00 AM–11:00 AM · John Tomay Memorial Library, 605 6th Street, Georgetown, CO 80444   Kids (event category) · Community
More on grassyknees.com: https://grassyknees.com/denver/this-weekend
=== search_activities {"metro":"DC","when":"this-weekend","free_only":true,"limit":3}20 events, free in Washington, DC for this weekend (2026-10-30 to 2026-11-01); showing the first 3:
1. **[Play Day in the Park at Black Hill Discovery Center](https://grassyknees.com/washington-dc/activities/play-day-in-the-park-at-black-hill-discovery-center--listing-c17ea7ba367fd70feca1648e)**   Fri, Oct 30 · 11:00 AM–12:00 PM (also other dates) · Black Hill Discovery Center, 20926 Lake Ridge Drive, Boyds, MD 20841   Ages 6 mos to 3 yrs · Outdoors...
=== get_activity {"url_or_id":"https://grassyknees.com/denver/activities/school-s-out-day-pumpkins-and-potions--listing-023a33783babb5880fc24e03"}# School's Out! Day: Pumpkins & Potions- When: Fri, Oct 30 · 8:30 AM–3:30 PM- Where: JCC Denver (Staenberg-Loup Jewish Community Center), 350 S. Dahlia St., Denver, CO 80246- Price, availability, registration, organizer links and contact: https://grassyknees.com/denver/activities/school-s-out-day-pumpkins-and-potions--listing-023a33783babb5880fc24e03...
=== seasonal_guide {"season":"ice-skating","metro":"denver","max_chars":1500}# Ice skating with kids in Denver> 9 ice rinks, public skates, holiday skate nights and learn-to-skate classes for kids in the Denver–Aurora–Centennial area this winter, ...[Trimmed to 1500 of 6484 characters. Full guide: https://grassyknees.com/denver/ice-skating (Markdown: https://grassyknees.com/denver/ice-skating.md)]

How it gets data

Read-only, public endpoints on grassyknees.com, one request at a time:

  • GET /api/activities?city=<metro>&fields=list for searches (one metro's current list, filtered and capped locally to 20 results),
  • GET /api/activities?ids=<id> for get_activity,
  • the site's Markdown pages (/<metro>/<season>.md) for seasonal_guide.

Responses are cached in memory for 10 minutes, so follow-up questions about the same metro don't refetch. Requests send User-Agent: grassyknees-mcp/<version>. Nothing is written to the site and no personal data is sent.

Set GRASSYKNEES_ORIGIN to point the server at another deployment (for testing).

Development

sh
npm installnpm run buildnpm run smoke            # calls each tool once against the live site (4 requests)npx @modelcontextprotocol/inspector --cli node dist/index.js --method tools/list

Credit

Data: Grassy Knees, grassyknees.com. When you show results, link to the listing's grassyknees.com page. Details can change, so check the listing page (it links the organizer's own page) before you go.

License

MIT for this server's code. Listing data belongs to Grassy Knees and is provided for lookups, not bulk copying.

Source: README.md at commit 6bd534d

Tools

0
SourceWeft has not started this package in its sandbox yet, so its tools are not known.

Version history

1
  1. v0.2.0LatestOct 29, 2026

Score

50% 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 days25 pts

    Keep the endpoint answering the MCP handshake; SourceWeft probes it every 30 days.

  • Auth declared10 pts

    Declare the credential headers in the registry entry, or keep the endpoint answering the probe so its auth can be classified.

  • Tools listed15 pts

    Answer tools/list without a credential, or ship a package that starts in a sandbox without one.

  • DescriptionRequired15 pts
  • Logo10 pts
  • Documentation15 pts
  • License10 pts