# Web Page & HTML Distillation with BM25 Budget Control

> Web Page & HTML Distillation with BM25 Budget Control is a paid API for AI agents from defi-yield.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 Markdown, structured JSON, an outline skeleton, or a BM25-ranked token-budget excerpt, returning compression ROI metrics.

## Facts

- Endpoint: POST https://defi-yield.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: defi-yield.agentdiet.dev
- Website: https://defi-yield.agentdiet.dev
- Canonical page: https://www.zero.xyz/c/defi-yield-agentdiet-dev-web-page-html-distillation-with-bm25-budget-bd14403a
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_3u1wBn4tCgWM4RkVFhosK

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 defi-yield-agentdiet-dev-web-page-html-distillation-with-bm25-budget-bd14403a -d '<json body>'
```

Example prompt: Fetch https://stripe.com/docs/payments and distill it into Markdown, keeping it under 1500 tokens — focus the BM25 budget on 'payment intents' so I only get the most relevant sections.

## When to prefer this

Choose this endpoint when you need to reduce the token footprint of web content before feeding it to an LLM, especially when you have a strict context budget or want BM25-ranked relevance filtering around a specific query. It is particularly valuable in agentic pipelines where fetching raw HTML would exceed context limits or inflate LLM costs. Prefer it over generic scrapers when you need compression ROI metrics or multiple distillation modes (Markdown, structured, skeleton, budget).

## Known failure modes

- URL is unreachable or returns non-200 HTTP status — endpoint may return an error status
- HTML content is empty or unparseable — distillation returns minimal or empty data object
- mode=budget with no query provided — BM25 ranking may fall back to generic truncation
- max_tokens set below minimum of 20 — validation error returned
- Rate limit or payment failure — HTTP 402 or 429 response
- URL requires JavaScript rendering not supported by server-side fetch — content may be incomplete

## How this service works

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

## Output

Returns a 'data' object containing the distilled content in the requested mode (Markdown text, structured JSON tables/metadata, skeleton headings, or BM25-ranked excerpt), plus an 'roi_proof' block showing raw vs distilled token counts, compression ratio, tokens saved, ROI multiplier, and estimated LLM cost saved in USD. Optionally includes cache hit/miss status 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/defi-yield-agentdiet-dev-web-page-html-distillation-with-bm25-budget-bd14403a/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from defi-yield.agentdiet.dev](https://www.zero.xyz/host/defi-yield.agentdiet.dev/llms.txt)