# SiteCheck Trade & Energy – US Lumber & Wood Products Producer Price Index (BLS WPU081 via FRED)

> SiteCheck Trade & Energy – US Lumber & Wood Products Producer Price Index (BLS WPU081 via FRED) is a paid API for AI agents from api.tradeenergy-api.workers.dev, paid per call via x402, $0.002/call, status unknown (last checked 2026-10-29).

Returns the US Bureau of Labor Statistics producer price index for lumber and wood products (BLS series WPU081) sourced from FRED, as monthly index values with up to 24 months of history.

## Facts

- Endpoint: GET https://api.tradeenergy-api.workers.dev/api/energy/timber-lumber-random-length?utm_source=zero.xyz
- Price: $0.002/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-29
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/sitecheck-trade-energy-us-lumber-wood-products-producer-price-index-2938d806
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_FFvI7vcyAYyw8Q2elb8Eg

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability sitecheck-trade-energy-us-lumber-wood-products-producer-price-index-2938d806
```

Example prompt: Can you pull the US producer price index for lumber and wood products (BLS WPU081) from FRED for the last 6 months so I can see how prices have trended?

## When to prefer this

Choose this endpoint when you need the official US Bureau of Labor Statistics producer price index for lumber and wood products (WPU081) as published via FRED, particularly for macroeconomic research, construction cost modeling, or commodity inflation tracking. Note: this is a monthly price index, not CME Random Length Lumber futures prices, spot quotes, or real-time timber market data — if you need futures or spot prices, look elsewhere.

## Known failure modes

- FRED API unavailable — upstream data source outage may return an error or stale data
- Invalid months parameter (outside 1–24 range) — may return a validation error or default to 3 months
- Data lag — BLS PPI is published monthly with a delay, so the latest date may be several weeks behind the current date
- No data available for a requested historical range — returns partial or empty history array

## How this service works

US producer price index for lumber and wood products (BLS series WPU081, via FRED), monthly index value. This is a price index, not CME Random Length framing lumber futures or spot quotes; the route name is kept for the owner.

## Output

A JSON object containing the BLS series identifier (WPU081), the latest index value with its date, a history array of monthly {date, value} records for the requested number of months, the FRED source URL, and a checkedAt timestamp. The unit is a price index (not a dollar spot price or futures price).

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [],
     "properties": {
      "months": {
       "type": "string",
       "description": "Months of history, 1 to 24 (default 3)"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "unit": "index",
  "latest": {
   "date": "2026-09-01",
   "value": 282.34
  },
  "series": "WPU081",
  "source": "https://fred.stlouisfed.org/graph/fredgraph.csv?id=WPU081",
  "history": [
   {
    "date": "2026-09-01",
    "value": 282.34
   },
   {
    "date": "2026-08-01",
    "value": 286.355
   }
  ],
  "checkedAt": "2026-10-23T09:38:24.032Z"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/sitecheck-trade-energy-us-lumber-wood-products-producer-price-index-2938d806/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.tradeenergy-api.workers.dev](https://www.zero.xyz/host/api.tradeenergy-api.workers.dev/llms.txt)