# Web Content Distillation with BM25 Budget Control

> Web Content Distillation with BM25 Budget Control is a paid API for AI agents from onchain-risk.agentdiet.dev, paid per call via MPP, $0.001/call, status unknown (last checked 2026-10-23).

Fetches a URL or accepts raw HTML and distills it into compact, agent-ready content with optional BM25-ranked token-budget control for query-focused extraction.

## Facts

- Endpoint: POST https://onchain-risk.agentdiet.dev/v1/context-diet?utm_source=zero.xyz
- Price: $0.001/call
- Payment: MPP
- Status: unknown
- Last checked: 2026-10-23
- Activations on Zero: 0
- Provider: onchain-risk.agentdiet.dev
- Website: https://onchain-risk.agentdiet.dev
- Canonical page: https://www.zero.xyz/c/onchain-risk-agentdiet-dev-web-content-distillation-with-bm25-budget-a9fab5aa
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_Hsx-3yrCJ21InuR0OdJVa

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 onchain-risk-agentdiet-dev-web-content-distillation-with-bm25-budget-a9fab5aa -d '<json body>'
```

Example prompt: Distill the content at https://stripe.com/docs/payments into markdown using budget mode, focused on 'payment intents', and keep it under 500 tokens.

## When to prefer this

Choose this endpoint when you need to reduce token consumption from web content before passing it to an LLM, especially when you have a strict context window budget or want query-focused excerpts via BM25 ranking. It is superior to raw web scraping for agent workflows because it returns pre-compressed, LLM-ready content with quantified token savings. Prefer over generic scrapers when you need structured output modes (markdown, JSON tables, skeleton) or when working with large documentation pages like Stripe or OpenAPI specs. The BM25 budget mode is uniquely suited for RAG pipelines where only query-relevant passages are needed.

## Known failure modes

- URL is unreachable or returns non-200 — fetch failure with error status
- HTML payload is empty or malformed — distillation returns minimal or empty data
- max_tokens set too low for meaningful content — may return truncated or nearly empty excerpt
- BM25 query provided without mode=budget — query may be ignored
- Payment not included or insufficient — HTTP 402 response blocking execution
- Rate limiting or upstream timeout on slow target URLs

## How this service works

Distill a URL or raw HTML payload with BM25 budget control (Live x402 v2, IETF MPP & MCP endpoint at https://onchain-risk.agentdiet.dev/v1/context-diet)

## Output

Returns a 'data' object containing the distilled content in the requested format (markdown, structured JSON, skeleton, or BM25 budget excerpt), along with an 'roi_proof' object showing raw vs distilled token counts, tokens saved, compression ratio percentage, estimated LLM cost saved in USD, and an ROI multiplier. Also includes cache status (HIT/MISS) and billing details.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "required": [
  "url"
 ],
 "properties": {
  "url": {
   "type": "string",
   "minLength": 1,
   "description": "Target webpage URL to fetch and distill (or builtin://stripe-docs)"
  },
  "html": {
   "type": "string",
   "description": "Optional raw HTML string to distill directly without fetching"
  },
  "mode": {
   "enum": [
    "markdown",
    "structured",
    "skeleton",
    "budget"
   ],
   "type": "string",
   "default": "markdown",
   "description": "Distillation mode"
  },
  "query": {
   "type": "string",
   "description": "BM25 focus query when mode=budget"
  },
  "max_tokens": {
   "type": "integer",
   "minimum": 20,
   "description": "Strict token budget ceiling when mode=budget"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "object",
 "required": [
  "status",
  "roi_proof",
  "data"
 ],
 "properties": {
  "data": {
   "type": "object",
   "description": "Distilled Markdown, structured JSON tables/metadata, skeleton outline, or BM25 budget excerpt."
  },
  "cache": {
   "type": "object",
   "properties": {
    "status": {
     "enum": [
      "HIT",
      "MISS"
     ],
     "type": "string"
    },
    "cache_key": {
     "type": "string"
    },
    "latency_ms": {
     "type": "number"
    }
   }
  },
  "status": {
   "type": "string",
   "description": "Execution status ('ok')"
  },
  "billing": {
   "type": "object",
   "properties": {
    "agent_id": {
     "type": "string"
    },
    "payment_method": {
     "type": "string"
    },
    "fee_charged_usd": {
     "type": "number"
    }
   }
  },
  "roi_proof": {
   "type": "object",
   "properties": {
    "raw_tokens": {
     "type": "integer"
    },
    "tokens_saved": {
     "type": "integer"
    },
    "roi_multiplier": {
     "type": "number"
    },
    "distilled_tokens": {
     "type": "integer"
    },
    "llm_cost_saved_usd": {
     "type": "number"
    },
    "compression_ratio_pct": {
     "type": "number"
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/onchain-risk-agentdiet-dev-web-content-distillation-with-bm25-budget-a9fab5aa/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from onchain-risk.agentdiet.dev](https://www.zero.xyz/host/onchain-risk.agentdiet.dev/llms.txt)