# Web URL Distillation & BM25 Token-Budget RAG Preprocessor

> Web URL Distillation & BM25 Token-Budget RAG Preprocessor is a paid API for AI agents from mesh.agentdiet.dev, paid per call via MPP, $0.001/call, status unknown (last checked 2026-10-21).

Fetches and compresses a web page (or raw HTML) into compact, agent-ready tokens using multiple distillation modes including BM25-focused budget extraction

## Facts

- Endpoint: GET https://mesh.agentdiet.dev/v1/rag-token-diet?utm_source=zero.xyz
- Price: $0.001/call
- Payment: MPP
- Status: unknown
- Last checked: 2026-10-21
- Activations on Zero: 0
- Provider: mesh.agentdiet.dev
- Website: https://mesh.agentdiet.dev
- Canonical page: https://www.zero.xyz/c/mesh-agentdiet-dev-web-url-distillation-bm25-token-budget-rag-fff95c11
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_SbPB_6thGqHOvswjT55YU

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 mesh-agentdiet-dev-web-url-distillation-bm25-token-budget-rag-fff95c11
```

Example prompt: Can you fetch https://docs.stripe.com/api and distill it into compact markdown, keeping it under 800 tokens and focusing on the authentication section?

## When to prefer this

Choose this endpoint when you need to feed live web content into an LLM context window cost-efficiently — especially when the raw page is large and token budget matters. It is distinctly useful for RAG pipelines, agent research tasks, and documentation ingestion where BM25 relevance filtering or structured extraction reduces noise. Prefer over generic scrapers when token savings and compression ROI metrics are needed, or when you want multiple distillation modes (markdown, structured, skeleton, budget) in a single call.

## Known failure modes

- URL is unreachable or returns non-200 — distillation fails with a fetch error
- URL points to a binary/non-HTML resource (PDF, image) — may return empty or garbled output
- max_tokens too small (below 20) — rejected by schema validation
- mode=budget used without a query — BM25 focus cannot operate, may fall back or error
- Raw HTML provided is malformed — distillation quality degrades
- Payment not settled (x402 flow) — 402 response returned before processing begins
- Cached stale content returned — cache HIT may reflect older page version

## How this service works

Distill a URL or raw HTML payload with BM25 budget control (Live x402 v2, IETF MPP & MCP endpoint at https://mesh.agentdiet.dev/v1/rag-token-diet)

## Output

Returns a 'data' object containing the distilled content (markdown text, structured JSON tables, skeleton outline, or BM25-focused excerpt depending on mode), plus an ROI proof block showing raw_tokens, distilled_tokens, tokens_saved, compression_ratio_pct, and llm_cost_saved_usd. Also includes cache status (HIT/MISS) and optional 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/mesh-agentdiet-dev-web-url-distillation-bm25-token-budget-rag-fff95c11/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from mesh.agentdiet.dev](https://www.zero.xyz/host/mesh.agentdiet.dev/llms.txt)