# Web URL Prompt Compressor with BM25 Budget Control

> Web URL Prompt Compressor 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 2026-10-21).

Fetches and distills a webpage URL (or raw HTML) into compact, agent-ready tokens using configurable extraction modes and BM25 budget targeting

## Facts

- Endpoint: GET https://defi-yield.agentdiet.dev/v1/prompt-compress?utm_source=zero.xyz
- Price: $0.001/call
- Payment: MPP
- Status: unknown
- Last checked: 2026-10-21
- 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-url-prompt-compressor-with-bm25-budget-984f8acf
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_TqRzEdOEM0bU8klETP2ub

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-url-prompt-compressor-with-bm25-budget-984f8acf
```

Example prompt: Distill the content at https://docs.stripe.com/payments into compact markdown, keeping it under 800 tokens and focused on the query 'payment intents'.

## When to prefer this

Choose this endpoint when you need to fit external web content into a constrained LLM context window efficiently, especially when token cost is a concern. It is ideal for agentic pipelines that must read documentation, articles, or data pages before reasoning, where raw HTML would be too large. Prefer budget mode with a query when you want semantically relevant excerpts rather than full-page summaries. It outperforms generic scrapers by returning token-count metadata and compression ROI, making it easy to track prompt efficiency.

## Known failure modes

- URL is unreachable or returns non-200 status — endpoint may return an error status
- Page is behind a login wall or CAPTCHA — content cannot be fetched
- Raw HTML is malformed beyond repair — distillation may produce empty or partial output
- max_tokens set too low (below 20) — rejected by schema validation
- query parameter missing when mode=budget — BM25 scoring cannot be applied
- Payment not provided for paid endpoint — HTTP 402 response requiring x402 payment
- URL parameter missing — required field, returns validation error

## 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/prompt-compress)

## Output

Returns a distilled representation of the webpage in the chosen format (markdown, structured JSON, skeleton outline, or BM25-focused excerpt), along with ROI proof showing raw vs distilled token counts, compression ratio, estimated LLM cost saved, and optional cache/billing metadata.

## 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-url-prompt-compressor-with-bm25-budget-984f8acf/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)