# AgentDiet Context Trimmer — BM25 Budget-Controlled Web Distillation

> AgentDiet Context Trimmer — BM25 Budget-Controlled Web Distillation is a paid API for AI agents from 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 compressed Markdown, structured JSON, a skeleton outline, or a BM25-ranked token-budget excerpt focused on a query

## Facts

- Endpoint: POST https://agentdiet.dev/v1/context-trimmer?utm_source=zero.xyz
- Price: $0.001/call
- Payment: MPP
- Status: unknown
- Last checked: 2026-10-23
- Activations on Zero: 0
- Provider: agentdiet.dev
- Website: https://agentdiet.dev
- Canonical page: https://www.zero.xyz/c/agentdiet-dev-agentdiet-context-trimmer-bm25-budget-controlled-web-c32de3fd
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_P7N7irRDIfPd693BdWFYQ

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 agentdiet-dev-agentdiet-context-trimmer-bm25-budget-controlled-web-c32de3fd -d '<json body>'
```

Example prompt: Distill the content at https://docs.stripe.com/api into concise markdown using budget mode, focused on 'payment intents', and keep it under 800 tokens so it fits in my context window.

## When to prefer this

Choose this endpoint when an AI agent needs to retrieve and compress web content to fit within an LLM context window, especially when cost efficiency and token savings matter. It is ideal over generic scrapers when you need BM25-focused excerpts around a specific query, structured JSON extraction from HTML tables, or strict token budget enforcement. Prefer it over raw fetch-and-summarize pipelines because it provides verifiable compression metrics (roi_proof) and supports multiple distillation modes in a single call.

## Known failure modes

- URL unreachable or returns non-200 — fetch failure with status error
- HTML payload too small or empty — minimal output with low compression
- Token budget too low (below minimum of 20) — validation error on max_tokens
- BM25 query missing when mode=budget — may return unfiltered or error response
- Rate limiting or payment failure via x402 — 402 response requiring payment
- Malformed HTML input — degraded distillation quality or partial output

## How this service works

Distill a URL or raw HTML payload with BM25 budget control (Live x402 v2, IETF MPP & MCP endpoint at https://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-ranked excerpt), along with an 'roi_proof' object showing raw vs distilled token counts, tokens saved, compression ratio percentage, estimated LLM cost saved in USD, and a multiplier. Also includes optional 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/agentdiet-dev-agentdiet-context-trimmer-bm25-budget-controlled-web-c32de3fd/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from agentdiet.dev](https://www.zero.xyz/host/agentdiet.dev/llms.txt)