# Distill URL or HTML with BM25 Budget Control

> Distill URL or HTML with BM25 Budget Control is a paid API for AI agents from serp-extract.agentdiet.dev, paid per call via MPP, $0.001/call, status unknown.

Fetches and distills a webpage URL or raw HTML into compact, token-efficient agent-ready content using BM25 scoring for query-focused budget-controlled extraction.

## Facts

- Endpoint: POST https://serp-extract.agentdiet.dev/v1/context-diet?utm_source=zero.xyz
- Price: $0.001/call
- Payment: MPP
- Status: unknown
- Activations on Zero: 0
- Provider: serp-extract.agentdiet.dev
- Website: https://serp-extract.agentdiet.dev
- Canonical page: https://www.zero.xyz/c/serp-extract-agentdiet-dev-distill-url-or-html-with-bm25-budget-control-78eeb859
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_0qozYzmgxpTwYV4R7ZuXa

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 serp-extract-agentdiet-dev-distill-url-or-html-with-bm25-budget-control-78eeb859 -d '<json body>'
```

Example prompt: Grab the page at https://docs.stripe.com/payments/checkout and distill it into budget mode with the query 'payment intents' keeping it under 500 tokens — I want just the most relevant content without the bloat.

## When to prefer this

Choose this endpoint when you need to read a webpage but must stay within a strict token budget, especially with BM25 query-focused filtering to extract only the most relevant content. It is superior to generic scrapers when LLM cost savings and compression ROI are important, or when you want structured/skeleton output rather than raw HTML. Prefer it over basic URL-to-markdown converters when you need provable token savings metrics.

## Known failure modes

- Missing required 'url' field returns validation error
- Invalid or unreachable URL causes fetch failure
- mode=budget without a 'query' field may return unfiltered or error response
- max_tokens below minimum (20) rejected with schema validation error
- Rate limiting or payment failure (HTTP 402) if USDC balance insufficient
- Very large HTML payloads may time out or exceed processing limits

## How this service works

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

## Output

Returns a distilled content object (markdown, structured JSON, skeleton outline, or BM25-focused excerpt depending on mode), plus an roi_proof block showing raw vs. distilled token counts, tokens saved, compression ratio percentage, LLM cost saved in USD, and 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/serp-extract-agentdiet-dev-distill-url-or-html-with-bm25-budget-control-78eeb859/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from serp-extract.agentdiet.dev](https://www.zero.xyz/host/serp-extract.agentdiet.dev/llms.txt)