# x402broker Context Compress — BM25 Budget Web Distillation

> x402broker Context Compress — BM25 Budget Web Distillation is a paid API for AI agents from x402broker.com, paid per call via MPP, $0.001/call, status unknown (last checked 2026-10-23).

Fetches and distills a URL or raw HTML into clean Markdown, structured JSON, a skeleton outline, or a BM25-ranked token-budget excerpt, returning ROI proof of tokens saved.

## Facts

- Endpoint: POST https://x402broker.com/v1/context-compress?utm_source=zero.xyz
- Price: $0.001/call
- Payment: MPP
- Status: unknown
- Last checked: 2026-10-23
- Activations on Zero: 0
- Provider: x402broker.com
- Website: https://x402broker.com
- Canonical page: https://www.zero.xyz/c/x402broker-com-x402broker-context-compress-bm25-budget-web-distillation-77c1f7c4
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_G3Paz3OTcZ3fpHWVK1LVf

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 x402broker-com-x402broker-context-compress-bm25-budget-web-distillation-77c1f7c4 -d '<json body>'
```

Example prompt: Distill the content at https://docs.stripe.com/payments/accept-a-payment into clean markdown using budget mode, focused on the query 'accept payment intent', and keep it under 800 tokens.

## When to prefer this

Choose this endpoint when you need to feed web content to an LLM but want to minimize token consumption and cost. It is especially valuable when you have a strict token budget (use budget mode with a BM25 query to get only the most relevant passages), when you need clean Markdown free of nav/ads/boilerplate, or when you want structured JSON tables extracted from HTML. Prefer it over generic scrapers when ROI accounting (tokens saved, cost saved) matters to your agent workflow, or when using the built-in Stripe docs shortcut (builtin://stripe-docs).

## Known failure modes

- URL is unreachable or returns non-200 — distillation fails with an error status
- HTML payload is empty or malformed — may produce an empty or low-quality distillation
- max_tokens set too low (below 20) — rejected by schema validation
- BM25 query not provided when mode=budget — may fall back to default behavior or return an error
- Rate limit or payment failure via x402 — 402 Payment Required response
- Target site blocks automated fetching (bot protection) — fetch fails or returns CAPTCHA content

## How this service works

Distill a URL or raw HTML payload with BM25 budget control (Live x402 v2, IETF MPP & MCP endpoint at https://x402broker.com/v1/context-compress)

## Output

Returns a JSON object with a 'data' field containing the distilled content (Markdown string, structured JSON tables/metadata, skeleton outline, or BM25-ranked budget excerpt depending on mode), plus an 'roi_proof' object showing raw_tokens, distilled_tokens, tokens_saved, compression_ratio_pct, roi_multiplier, and llm_cost_saved_usd. Also includes cache status (HIT/MISS) 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/x402broker-com-x402broker-context-compress-bm25-budget-web-distillation-77c1f7c4/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from x402broker.com](https://www.zero.xyz/host/x402broker.com/llms.txt)