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io.github.guzz-labs/epwforge-mcp

by guzz-labs · remote · local (pypi) · no sign-in to list tools · v0.3.1 · published by GitHub user guzz-labs

EPW/DDY weather files - TMY/AMY/CMIP6 morphing, UHI, events, smoke. 3 of 4 tools anon-free.

Changes · 3
CompareRegistry entry

6 tools: 3 change things and 3 only read.

Scanned Oct 21, 2026

No check matched anything in the tool definitions. No finding is not a safety guarantee. How the checks work.

claude mcp add --transport http epwforge https://epwforge.com/api/mcp

Tools

Open a tool for its reasons and full description. Descriptions are the publisher's own words, shown as they are.

6 tools

Changes things 3Claude Code: ask
  • chart_weatherRender an SVG chart from EPW data.No findings

    Why it is in this group

    • Nothing in its name or description says what it does, so it is counted as a write.
    Description, as the server wrote it
    Render an SVG chart from EPW data. Eight chart types: `diurnal` (~10 KB, monthly hourly profile), `temp_carpet` (heatmap of hour × day-of-year — ~30 KB preview / ~150 KB full), `wind_rose` (~12 KB, polar bars by direction × speed), `monthly_boxplot` (~6 KB, Q1/median/Q3 + whiskers per month), `utci_carpet` (~90 KB, outdoor heat-stress hour × day, colored by UTCI category — Bröde 2012, shaded Tmrt), `economizer_carpet` (~90 KB, air-side economizer free / integrated / locked-out hour × day under ASHRAE 90.1 high-limit), `pv_tilt_azimuth` (~60 KB, annual PV generation across full tilt × azimuth space, isotropic-sky POA at lat from EPW header — optimum orientation marked), `solar_under_events` (~12 KB, weekly GHI of the modified scenario vs the no-overlay reference; bands color event-affected weeks. Requires `config` — server runs the pipeline twice, with and without overlays), `comparison` (~10 KB, design-condition deltas across EPWs). Accepts `url` (single), `urls` (2+ for comparison), or `config` (synthesize on the fly). Config mode is anon-safe — runs pipeline, returns SVG only. No auth required. **Token budget**: SVGs are returned inline by default. Large outputs (>50 KB) auto-upload to Blob storage (when configured) and return a URL instead, keeping your context lean. Always check `svg_size_kb` in the response. **Presentation: when handing the chart to the user, just link or embed it — don't narrate what's in it. Let the chart speak.**
  • explore_design_conditionsInteractive single-site design-conditions explorer.No findings

    Why it is in this group

    • Nothing in its name or description says what it does, so it is counted as a write.
    Description, as the server wrote it
    Interactive single-site design-conditions explorer. Returns full ASHRAE design conditions + diurnal chart for the requested scenario. In MCP Apps-capable hosts (Claude Desktop, ChatGPT, VS Code, Goose), the response renders as a widget with sliders for SSP / year / percentile / UHI — dragging a slider re-calls this tool live. Use when a user wants to interactively tune a single site. For multi-site comparison, use analyze_weather(urls=[...]) instead. Defaults to present-day TMY (no morph) — pass ssp+year for future scenarios. P75 default percentile is design-realistic; P50 underestimates the tail. No auth required.
  • generate_weather_fileGenerate and deliver an EPW or DDY file.No findings

    Why it is in this group

    • The name "generate_weather_file" says "generate": a word for a change.
    Description, as the server wrote it
    Generate and deliver an EPW or DDY file. A paid tool — charges credits per call: 1 for a single file, 1 per scenario for a scenarios batch (max 10), 10 for a per-model CMIP6 ensemble. Requires auth (Bearer API key or OAuth). Credits come from a Forge pass ($9.99/wk = 2 non-expiring credits, or $99/yr) or a top-up pack; see the epwforge://catalog/pricing resource. No account? Buy a fixed-price guest bundle — see preview_forge_bundle. For free analysis without credits, use analyze_weather or chart_weather on a real published EPW URL.
Only reads 3Claude Code: allow
  • analyze_weatherCompute design conditions, HDD/CDD, monthly stats, and peak heating/cooling days for one or more EPW files.No findings

    Why it is in this group

    • The name "analyze_weather" says "analyze": a word for reading.
    Description, as the server wrote it
    Compute design conditions, HDD/CDD, monthly stats, and peak heating/cooling days for one or more EPW files. Accepts a `url` (existing EPW), `urls` (compare 2+), or `config` (synthesize on the fly with morphing/UHI/events/smoke). Config mode runs the full generation pipeline server-side but returns only stats — never the EPW content. **Token-saver: pass `compact: true` to get a ~10-field headline response (~100 tokens) instead of the full ~800-token payload.** Use compact for sanity-checking, dashboards, or when chaining many calls; full when you need monthly arrays / peak days / full ASHRAE. Optional `include_full_ashrae` adds ASHRAE 0.4/1/2% cooling + 99.6/99% heating design conditions with mean coincident dewpoint. Optional `include_improbability` (config mode) adds a stress-test score. Optional `include_idf` adds ready-to-paste EnergyPlus SizingPeriod:DesignDay objects. Optional `units` ('imperial' default | 'metric'). **Presentation: when calling with `urls` (multiple files), the response includes a `comparisons` array — render it as a markdown table to the user. Lead with the headline delta, not the raw data.** No auth required; no credits charged.
  • find_stationSearch the GuzzStations catalog (17,000+ weather stations worldwide, self-hosted mirror of OneBuilding TMYx).No findings

    Why it is in this group

    • The name "find_station" says "find": a word for reading.
    Description, as the server wrote it
    Search the GuzzStations catalog (17,000+ weather stations worldwide, self-hosted mirror of OneBuilding TMYx). Returns matching stations with EPW URLs ready to pass to analyze_weather or chart_weather. Optionally enriches with AMY extreme years (hottest / coldest / most-humid on record) and CMIP6 climate deltas. No auth required.
  • preview_forge_bundlePreview a fixed-price Forge bundle for a location — the no-account way to buy weather files.No findings

    Why it is in this group

    • The name "preview_forge_bundle" says "preview": a word for reading.
    Description, as the server wrote it
    Preview a fixed-price Forge bundle for a location — the no-account way to buy weather files. Returns the exact scenario breakdown, file count, price, and a purchase link the user opens for guest checkout. Bundles: Carbon (10 scenarios), Titanium (30), Damascus (64); each scenario delivered as EPW + DDY + STAT + PVsyst. Free, no auth, creates no order.

This is not a safety rating, and no finding is not a safety guarantee. The groups and findings come from fixed checks of the tool definitions the server returned on the date shown, not from its code or what it does when called. How the checks work.

Install

Pinned to version 0.3.1. Values in angle brackets are yours to fill in.

claude mcp add --transport http epwforge https://epwforge.com/api/mcp

Run in a terminal.

Claude Code permissions

Allow the reads, ask before a change, deny the deletes. Paste into .claude/settings.json.

.claude/settings.json
{
  "permissions": {
    "allow": [
      "mcp__epwforge__find_station",
      "mcp__epwforge__analyze_weather",
      "mcp__epwforge__preview_forge_bundle"
    ],
    "ask": [
      "mcp__epwforge__chart_weather",
      "mcp__epwforge__explore_design_conditions",
      "mcp__epwforge__generate_weather_file"
    ],
    "deny": []
  }
}

Tools that only read are allowed, tools that change things ask first, tools that delete or cancel are denied. It assumes the server is installed as epwforge. Review it before you use it.