# AgentDiet Prompt Compress – BM25 Budget-Controlled Web Distillation

> AgentDiet Prompt Compress – 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 and distills a URL or raw HTML into compressed Markdown, structured JSON, skeleton outline, or BM25-focused budget excerpt with token savings proof

## Facts

- Endpoint: POST https://agentdiet.dev/v1/prompt-compress?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-prompt-compress-bm25-budget-controlled-web-5d8c063d
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_lt2rq_SuwD0mgMSeDrVdz

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-prompt-compress-bm25-budget-controlled-web-5d8c063d -d '<json body>'
```

Example prompt: Distill the content at https://stripe.com/docs/payments into focused markdown about payment intents, staying under 800 tokens using BM25 budget mode — I want to know how much token cost this saves me.

## When to prefer this

Choose this endpoint when you need to compress web content before inserting it into an LLM prompt — especially when working with long documentation pages, articles, or HTML dumps that would otherwise exceed context window limits or inflate LLM costs. Prefer it over raw scraping when you need token-budget control, BM25 query-focused relevance filtering, or structured/skeleton output modes. Ideal for autonomous agents that need to read many web pages cheaply.

## Known failure modes

- URL is unreachable or returns non-200 — distillation fails with fetch error
- HTML payload is empty or malformed — returns error status
- max_tokens set too low (below 20) — rejected by schema validation
- mode=budget requested without a query — BM25 scoring has no focus, may return degraded results
- Rate limiting or payment failure via x402 — request blocked
- Target page is JavaScript-heavy SPA with no static HTML — distillation quality degrades significantly

## 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/prompt-compress)

## Output

Returns a `data` object containing the distilled content (Markdown text, structured JSON tables/metadata, skeleton outline, or BM25-focused budget excerpt), plus an `roi_proof` object showing raw token count, distilled token count, tokens saved, compression ratio percentage, and estimated LLM cost saved in USD. 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-prompt-compress-bm25-budget-controlled-web-5d8c063d/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)