Click on "Install Server".
Wait a few minutes for the server to deploy. Once ready, it will show a "Started" state.
In the chat, type @ followed by the MCP server name and your instructions, e.g., "@tsforge-mcp convert epoch 1735689600 to SQL timestamps for Postgres and MySQL"
That's it! The server will respond to your query, and you can continue using it as needed.
Here is a step-by-step guide with screenshots.
Zero-dependency MCP server exposing 15 timestamp tools that LLMs compute unreliably — cron edge cases, the Excel 1900 leap-year bug, ISO-8601 duration arithmetic, multi-dialect SQL timestamp generation, business-day counting, and batch conversion.
One codebase, two transports:
stdio — Claude Desktop / local agents (MCP native)
http — ChatGPT Apps SDK / any remote MCP client (Streamable HTTP)
No npm dependencies. No network calls. Pure Node.js built-ins.
The official mcp-server-time ships only two tools (get_current_time, convert_time) — things an LLM can already do. The moat is everything an LLM gets wrong at the boundaries:
leap-day cron (29 Feb), the Excel 1900 leap-year bug (serial 60 → a non-existent date), ISO week rollovers, DST/timezone offsets, multi-dialect SQL, and holiday-aware business days.
sql_timestamp in particular targets a blue ocean: Google's AI Overview still only surfaces syntax docs (MS Learn / W3Schools / StackExchange) — no clean dedicated converter ranks for it yet.
Related MCP server: datetime-mcp
If you prefer a web UI, the same engine powers GotTimestamp.com — the dedicated SQL timestamp converter page built for this niche.
npm install -g tsforge-mcp
# or run directly
node server.mjs --transport stdioAdd to claude_desktop_config.json:
{
"mcpServers": {
"tsforge": {
"command": "node",
"args": ["/absolute/path/to/tsforge-mcp/server.mjs", "--transport", "stdio"]
}
}
}Deploy the HTTP server (any host that keeps a long-lived Node process, e.g. a container / VM):
node server.mjs --transport http --port 3000Expose it at a public HTTPS URL (reverse proxy / tunnel).
Submit the MCP server via the ChatGPT Apps SDK submission portal. Because the Apps SDK is built on MCP, the same server is callable from both ChatGPT and the Claude/MCP ecosystem.
tool | what it does |
| next N fire times of a 5-field cron, including |
| human-readable cron description |
| Excel serial ↔ date, handles the 1900 leap-year bug |
| add |
| correct SQL for epoch↔datetime across MySQL / Postgres / SQLite / SQL Server |
| weekdays between dates minus an optional holiday list |
| convert an array of epochs/dates in one call (enterprise batch) |
convert_timestamp (s/ms/us/ns) · timezone_convert · week_number (ISO) · relative_time · date_difference · add_subtract · age_calculator · timestamp_generate · date_info
node test_lib.mjs # boundary correctness (Excel bug, cron leap-day, ISO week…)
node test.mjs # MCP stdio handshake
node test_http.mjs # MCP Streamable HTTP handshake + tool callsThis server cannot be installed
Unclaimed servers have limited discoverability.
If you are the server author, to access and configure the admin panel.
A time server that keeps your AI honest about time. Real clock + drift guard, zero dependencies.
AI Reasoning Cache & Consensus Layer with 11 MCP tools via Streamable HTTP.
Business-day, SLA, cron and recurrence calculations — offline, holiday-aware, no network.
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