# AgentDiet Prompt Compress – Web URL Distillation

> AgentDiet Prompt Compress – Web URL Distillation is a paid API for AI agents from alpha-stream.agentdiet.dev, paid per call via MPP, $0.001/call, status unknown (last checked 2026-10-21).

Fetches a web URL (or accepts raw HTML) and compresses it into compact, agent-ready tokens using BM25 budget control and multiple extraction modes

## Facts

- Endpoint: GET https://alpha-stream.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: alpha-stream.agentdiet.dev
- Website: https://alpha-stream.agentdiet.dev
- Canonical page: https://www.zero.xyz/c/alpha-stream-agentdiet-dev-agentdiet-prompt-compress-web-url-51366ed2
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_onDfwiU331cBO9Ewawye3

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 alpha-stream-agentdiet-dev-agentdiet-prompt-compress-web-url-51366ed2
```

Example prompt: Distill the content at https://stripe.com/docs/payments into compact markdown, using budget mode focused on the query 'payment intents' with a max of 500 tokens — I need it tight enough to fit in my prompt without blowing my context window.

## When to prefer this

Choose this endpoint when you need to feed web page content into an LLM but want to minimize token usage and cost. It is especially useful when working with long documentation pages, news articles, or any HTML-heavy URL that would otherwise exceed context window limits. The BM25 budget mode makes it uniquely suited for query-focused extraction where only the most relevant portions of a page matter. Prefer it over raw scraping when token efficiency and LLM cost reduction are priorities.

## Known failure modes

- URL is unreachable or returns non-200 status — endpoint may return an error status
- max_tokens set below minimum of 20 — validation error
- mode=budget used without a query — BM25 ranking may be undefined
- Raw HTML too large — may exceed processing limits
- Invalid URL format — missing protocol or malformed string
- Payment not completed via x402 — 402 response requiring micropayment

## How this service works

Distill a URL or raw HTML payload with BM25 budget control (Live x402 v2, IETF MPP & MCP endpoint at https://alpha-stream.agentdiet.dev/v1/prompt-compress)

## Output

Returns a distilled version of the webpage in the requested format (markdown, structured JSON tables/metadata, skeleton outline, or BM25-ranked budget excerpt), along with an ROI proof object showing raw token count, distilled token count, tokens saved, compression ratio percentage, and estimated LLM cost saved in USD. Also 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/alpha-stream-agentdiet-dev-agentdiet-prompt-compress-web-url-51366ed2/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from alpha-stream.agentdiet.dev](https://www.zero.xyz/host/alpha-stream.agentdiet.dev/llms.txt)