@pipeworx/spp

SPP (Southwest Power Pool) real-time electricity data — generation mix, load and renewable forecast vs actual, five-minute LMPs, and the raw Marketplace file archive back to 2013, for the 14-state footprint from the Texas panhandle to North Dakota.

Part of Pipeworx — an MCP gateway connecting AI agents to 1857+ live data sources. This is an independent, unofficial integration — not affiliated with, endorsed by, or published by the upstream provider.

Tools

• spp_generation_mix(limit?, detailed?) — MW per fuel per 5-minute interval (coal, gas, nuclear, wind, solar, hydro, diesel fuel oil, energy storage, waste heat, waste disposal, other) plus total load. detailed: true splits each fuel into its Market and Self-scheduled halves over a rolling 365-day feed.
• spp_load_forecast(limit?, include_future?) — short- and mid-term load, wind and solar forecasts (STLF/MTLF, STWF/MTWF, STSF/MTSF) against actual load, wind and solar.
• spp_lmp_latest(location?, limit?) — the most recently published RTBM 5-minute interval, per settlement location (~1,600), with LMP split into MEC / MCC / MLC.
• spp_files(dataset, path?, download?, limit?) — browse or download the Marketplace file archive directly, for a specific historical interval or day.

Auth

Keyless. No registration.

Data sources

• https://portal.spp.org/chart-api/gen-mix/asFile — current-day generation mix CSV.
• https://portal.spp.org/chart-api/gen-mix-365/asFile — rolling 365-day, market vs self-scheduled.
• https://portal.spp.org/chart-api/load-forecast/asFile — load/wind/solar forecast vs actual CSV.
• <https://portal.spp.org/file-browser-api/?fsName=&path=&type=folder> — JSON directory listing of the Marketplace archive.
• <https://portal.spp.org/file-browser-api/download/?path=> — the file.

Traps

• marketplace.spp.org 302-redirects to portal.spp.org for every API path. Call portal.spp.org directly so a Worker fetch never depends on redirect handling.
• The load-forecast CSV is published a week ahead and is newest-first, so the first ~2,000 rows are future intervals with every value blank. A naive rows[0] returns a row of nulls as a clean success. Measured 2026-09-17: 2,017 forecast-only rows in front of 287 settled ones. spp_load_forecast splits on "does this row have an Actual Load", reports latest_actual from the newest settled row, and exposes forecast_only_intervals so the caller can see the split. This is the pack's main reason for existing over a raw CSV fetch.
• Two timezones in one dataset. gen-mix timestamps are GMT; the LMP archive FILENAMES (RTBM-LMP-SL-202609171905.csv) are Central. Mixing them shifts you five or six hours. Inside the LMP file, Interval is Central and GMTIntervalEnd is UTC.
• Don't compute the "current" LMP filename. SPP publishes each 5-minute interval a few minutes late, so the filename for right now is usually a 404. spp_lmp_latest lists the day's By_Interval folder and takes the newest file that exists, falling back to the previous day just after midnight CT.
• The file-listing endpoint needs no token. SPP's own UI sends an X-SPP-UI-Token header; the server does not require it (verified 2026-09-17), so this pack sends none rather than forge one.
• Blank means unknown, not zero. num() returns null for an empty cell.

Quick Start

Add to your MCP client (Claude Desktop, Cursor, Windsurf, etc.):

{
  "mcpServers": {
    "spp": {
      "url": "https://gateway.pipeworx.io/spp/mcp"
    }
  }
}

What this endpoint actually serves

tools/list at https://gateway.pipeworx.io/spp/mcp returns the tools in the table above plus the shared Pipeworx meta-tools — ask_pipeworx, discover_tools, search_within, remember/recall and the rest of the gateway-wide set. So the tool count you see is larger than this table: a single-pack endpoint currently lists roughly 30 shared tools alongside the pack's own. The connection's initialize response states its exact scope, and is the authoritative answer for a given day.

This is deliberate, not multiplexing by accident. The meta-tools are what let a scoped connection answer a question this pack does not cover — via ask_pipeworx, which routes across the whole catalog — without you adding a second MCP server. There is currently no way to mount a pack endpoint without them; if the extra schemas cost you more context than the routing is worth, connect to the full gateway once rather than to several pack endpoints.

Or connect to the full Pipeworx gateway to get every pack's tools listed directly, instead of just this one's:

{
  "mcpServers": {
    "pipeworx": {
      "url": "https://gateway.pipeworx.io/mcp"
    }
  }
}

Both URLs reach the same gateway and the same 1857+ data sources. The only difference is which pack's tools are listed directly; ask_pipeworx reaches all of them from either one.

No MCP client? Call it over HTTP

curl -X POST https://gateway.pipeworx.io/v1/tools/spp_generation_mix \
  -H 'Content-Type: application/json' \
  -d '{"limit":3}'

No account needed for the first calls. Inspect any tool: GET https://gateway.pipeworx.io/v1/tools/spp_generation_mix. Find one: POST https://gateway.pipeworx.io/v1/tools/search_packs with {"query":"..."}.

Run it from npm

@pipeworx/mcp-spp is a local stdio bridge to the Pipeworx gateway: your MCP client starts it with npx, and it forwards every call to the same https://gateway.pipeworx.io/spp/mcp endpoint shown above. It needs network access; there is no offline mode.

{
  "mcpServers": {
    "spp": {
      "command": "npx",
      "args": ["-y", "@pipeworx/mcp-spp"]
    }
  }
}

Without a key it calls anonymously, capped at 50 calls a day. A free account raises that to 200 a day: get a key at https://pipeworx.io/signup and add "env": { "PIPEWORX_API_KEY": "<your key>" } to the server entry. The key is sent as a Bearer token, the same way a hosted connection sends it, so calls are metered and billed exactly as they are there.

It lists only this pack's tools by default. Set PIPEWORX_META_TOOLS=1 to also list ask_pipeworx and the other gateway-wide tools.

Behind an HTTPS proxy: Node's built-in fetch does not read HTTPS_PROXY by default. Newer Node releases honour it when NODE_USE_ENV_PROXY=1 is set; check your Node version's documentation.

Using with ask_pipeworx

Instead of calling tools directly, you can ask questions in plain English — this works on the pack endpoint above as well as on the full gateway:

ask_pipeworx({ question: "your question about Spp data" })

The gateway picks the right tool and fills the arguments automatically.

More

• Docs and guides
• pipeworx.io

License

MIT