# AgentDiet Context Diet — BM25 Budget-Controlled Web Distillation

> AgentDiet Context Diet — BM25 Budget-Controlled Web Distillation is a paid API for AI agents from workflows.agentdiet.dev, paid per call via MPP, $0.001/call, status unknown (last checked 2026-10-23).

Fetches and distills a URL or raw HTML into compact, token-efficient agent-ready content using BM25-ranked budget control and multiple distillation modes

## Facts

- Endpoint: POST https://workflows.agentdiet.dev/v1/context-diet?utm_source=zero.xyz
- Price: $0.001/call
- Payment: MPP
- Status: unknown
- Last checked: 2026-10-23
- Activations on Zero: 0
- Provider: workflows.agentdiet.dev
- Website: https://workflows.agentdiet.dev
- Canonical page: https://www.zero.xyz/c/workflows-agentdiet-dev-agentdiet-context-diet-bm25-budget-controlled-423d4522
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_fCtTzFoNlk5y1JWZHI9Cj

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-agentdiet-context-diet-bm25-budget-controlled-423d4522 -d '<json body>'
```

Example prompt: Fetch https://stripe.com/docs/payments and distill it in budget mode focused on the query 'webhook setup', keeping it under 500 tokens so I can use it in my prompt without blowing my context window.

## When to prefer this

Choose this endpoint when an AI agent needs to read web content but must stay within a token budget or reduce LLM costs — especially when BM25-ranked relevance filtering is needed to focus on a specific topic within a large page. Prefer it over generic scrapers when you need built-in compression metrics (ROI proof), multiple distillation modes (markdown, structured, skeleton, budget), or when working with raw HTML payloads directly rather than fetching URLs.

## Known failure modes

- URL is unreachable or returns a non-200 HTTP response — endpoint may return an error status
- Raw HTML is malformed or empty — distillation may produce minimal or no output
- max_tokens set too low (below 20) — rejected by schema validation
- BM25 query provided without mode=budget — query may be ignored
- Payment not authorized via x402 — 402 response blocking execution
- Idempotency-Key reused for a different payload — may return cached prior result unexpectedly

## 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-diet)

## Output

Returns a 'data' object containing the distilled content (Markdown, structured JSON, skeleton outline, or BM25-ranked excerpt depending on mode), along with ROI proof metrics (raw token count, distilled token count, tokens saved, compression ratio percentage, LLM cost saved in USD, ROI multiplier), optional cache hit/miss info, 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/workflows-agentdiet-dev-agentdiet-context-diet-bm25-budget-controlled-423d4522/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)