# SiteCheck Trade & Energy – BLS Wood Pulp Producer Price Index (WPU0911 via FRED)

> SiteCheck Trade & Energy – BLS Wood Pulp Producer Price Index (WPU0911 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 wood pulp (BLS series WPU0911, sourced from FRED) as a monthly index value, with up to 24 months of history.

## Facts

- Endpoint: GET https://api.tradeenergy-api.workers.dev/api/energy/pulp-paper-risi-index?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-bls-wood-pulp-producer-price-index-wpu0911-via-db91b99d
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_P4ESaLa_ny7qIRLIceVBL

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-bls-wood-pulp-producer-price-index-wpu0911-via-db91b99d
```

Example prompt: Can you pull the latest US producer price index for wood pulp (BLS WPU0911 from FRED) along with the last 12 months of history so I can see the recent price trend?

## When to prefer this

Choose this endpoint when you need a programmatic, machine-readable feed of the US producer price index for wood pulp (BLS WPU0911) with up to 24 months of monthly history, without having to query FRED directly. Prefer it over raw FRED API calls when operating within an x402 micropayment-enabled agent workflow, or when you want a pre-normalized JSON response with the latest value highlighted. Note: this is the BLS PPI index, not the RISI NBSK benchmark benchmark price — if you need RISI Northern Bleached Softwood Kraft market prices specifically, this endpoint will not satisfy that need.

## Known failure modes

- FRED/BLS data temporarily unavailable — upstream fetch failure
- Invalid 'months' parameter (outside 1–24 range) may return an error or default
- No data returned if FRED has not yet published the most recent month
- Payment not received or x402 payment failure — endpoint returns 402
- Network timeout from Cloudflare Workers to FRED upstream

## How this service works

US producer price index for wood pulp (BLS series WPU0911, via FRED), monthly index value. This is a price index, not the RISI Northern Bleached Softwood Kraft (NBSK) benchmark; the route name is kept for the owner. Latest value plus up to 24 months of history.

## Output

A JSON object containing the BLS series identifier (WPU0911), the latest monthly index value with its date, a history array of up to 24 month-by-month {date, value} entries, the source FRED URL, the unit ('index'), and a checkedAt timestamp indicating when the data was last fetched.

## 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": 222.983
  },
  "series": "WPU0911",
  "source": "https://fred.stlouisfed.org/graph/fredgraph.csv?id=WPU0911",
  "history": [
   {
    "date": "2026-09-01",
    "value": 222.983
   },
   {
    "date": "2026-08-01",
    "value": 219.93
   }
  ],
  "checkedAt": "2026-10-23T09:38:24.055Z"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/sitecheck-trade-energy-bls-wood-pulp-producer-price-index-wpu0911-via-db91b99d/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)