# AgentDiet Context Trimmer – Web URL Distillation

> AgentDiet Context Trimmer – 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 distillation modes

## Facts

- Endpoint: GET https://alpha-stream.agentdiet.dev/v1/context-trimmer?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-context-trimmer-web-url-26dbc6eb
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_hXYKlE-1hyjAd_FUYj3rK

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-context-trimmer-web-url-26dbc6eb
```

Example prompt: Can you fetch the Stripe docs page at https://stripe.com/docs/api/charges and distill it into compact markdown, keeping it under 500 tokens and focusing on the 'create a charge' section?

## When to prefer this

Choose this endpoint when an AI agent needs to incorporate live web content into its context window without exhausting token budgets. It is ideal when working with long documentation pages, news articles, or raw HTML that must be compressed before being sent to an LLM. The BM25 budget mode is especially valuable when only a topically relevant excerpt is needed. Prefer this over generic scraping tools when token efficiency and LLM cost savings are explicit concerns, or when structured output (tables, skeleton, markdown) from web content is needed.

## Known failure modes

- Invalid or unreachable URL returns a fetch error
- mode=budget without a query or max_tokens may return unfiltered content
- Very large HTML pages may exceed processing limits
- Paywalled or JavaScript-rendered pages may return incomplete content
- max_tokens below minimum of 20 triggers a validation error
- Missing required 'url' parameter returns a 400-level 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://alpha-stream.agentdiet.dev/v1/context-trimmer)

## Output

Returns a 'data' object containing the distilled content in the requested format (markdown, structured JSON, skeleton outline, or BM25-focused excerpt), plus an 'roi_proof' object showing raw vs. distilled token counts, tokens saved, compression ratio percentage, ROI multiplier, and estimated LLM cost saved in USD. Also includes cache hit/miss status and optional 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/alpha-stream-agentdiet-dev-agentdiet-context-trimmer-web-url-26dbc6eb/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)