# Web URL Context Distiller (BM25 Budget Control)

> Web URL Context Distiller (BM25 Budget Control) is a paid API for AI agents from workflows.agentdiet.dev, paid per call via MPP, $0.001/call, status unknown (last checked 2026-10-21).

Fetches and compresses a web URL or raw HTML into compact, agent-ready tokens using BM25-ranked budget control and multiple distillation modes.

## Facts

- Endpoint: GET https://workflows.agentdiet.dev/v1/context-bloat-eliminator?utm_source=zero.xyz
- Price: $0.001/call
- Payment: MPP
- Status: unknown
- Last checked: 2026-10-21
- Activations on Zero: 0
- Provider: workflows.agentdiet.dev
- Website: https://workflows.agentdiet.dev
- Canonical page: https://www.zero.xyz/c/workflows-agentdiet-dev-web-url-context-distiller-bm25-budget-control-4aac1e90
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_ZRfRrQP9OFXIOub1n3P7i

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 workflows-agentdiet-dev-web-url-context-distiller-bm25-budget-control-4aac1e90
```

Example prompt: Can you distill https://stripe.com/docs/api into compact markdown for me, using budget mode focused on 'payment intents' and capping it at 500 tokens?

## When to prefer this

Choose this endpoint when an AI agent needs to ingest a web page or HTML document but must stay within a token budget. It is especially useful when you need BM25-ranked relevance filtering (mode=budget) to surface only the content most relevant to a specific query, or when you need a structured/skeleton view of a page rather than raw text. Prefer this over generic scraping when token efficiency and LLM cost savings are the primary concern.

## Known failure modes

- URL is unreachable or returns a non-200 status — endpoint may return an error status
- URL points to a non-HTML resource (PDF, binary) — distillation may fail or return partial content
- max_tokens set too low for meaningful extraction — output may be truncated or empty
- BM25 query is too vague — budget excerpt may not surface the most relevant content
- Rate limiting or payment failure via x402 — call rejected with 402 or 429
- HTML input is malformed — structured or skeleton modes may return incomplete results

## How this service works

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

## Output

Returns a distilled payload (Markdown, structured JSON, skeleton outline, or BM25-ranked excerpt), along with ROI proof metrics including raw token count, distilled token count, tokens saved, compression ratio percentage, and estimated LLM cost saved. Also includes cache hit/miss status and billing info.

## 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/workflows-agentdiet-dev-web-url-context-distiller-bm25-budget-control-4aac1e90/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from workflows.agentdiet.dev](https://www.zero.xyz/host/workflows.agentdiet.dev/llms.txt)