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Web URL to Markdown Distiller with BM25 Budget Control
Web URL to Markdown Distiller with BM25 Budget Control is a paid API for AI agents from preflight.agentdiet.dev, paid per call via MPP, $0.001/call, status unknown (last checked 2026-10-21).
Fetches a webpage by URL (or accepts raw HTML) and distills it into compact, agent-ready markdown, structured JSON, skeleton outline, or BM25-focused budget excerpt with token savings metrics
Price / call$0.001
Success—
StatusUnknown
How this service works
Distill a URL or raw HTML payload with BM25 budget control (Live x402 v2, IETF MPP & MCP endpoint at https://preflight.agentdiet.dev/v1/markdown-distill)
Output
Returns a JSON object with a 'data' field containing the distilled content (markdown text, structured tables, skeleton outline, or BM25-focused excerpt depending on mode), plus an 'roi_proof' object showing raw_tokens, distilled_tokens, tokens_saved, compression_ratio_pct, and llm_cost_saved_usd. Also includes optional cache hit/miss status and billing details.
Example use cases
Documentation page for agent context
“Grab https://docs.openai.com/api-reference and distill it into clean markdown so I can include it in my agent's context window without blowing the token limit.”
BM25-focused excerpt for research query
“Distill https://en.wikipedia.org/wiki/Transformer_(machine_learning) in budget mode, focused on the query 'attention mechanism', max 300 tokens — I just need the relevant bits.”
Structured data extraction from web page
“Fetch https://news.ycombinator.com and distill it in structured mode so I get the top stories as a JSON table I can process programmatically.”
Technical details
Endpoint
GEThttps://preflight.agentdiet.dev/v1/markdown-distill?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need to fetch and compress a webpage into a form suitable for LLM context windows, especially when token budget is a concern. It is superior to raw web scraping when you need clean markdown, structured tables, or BM25-focused excerpts rather than raw HTML. Prefer budget mode when you have strict token limits and a known query focus. Best for agent pipelines that repeatedly read documentation, articles, or data pages and need to minimize LLM costs.
Side effects
- URL is unreachable or returns non-200 — endpoint may return an error status
- HTML payload is malformed or empty — distillation may produce minimal or no output
- max_tokens set too low — content may be severely truncated or empty
- BM25 query does not match any content — budget mode may return very little
- Rate limiting or payment failure via x402 — call rejected with 402 status
- Invalid mode enum value — API returns validation error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| urlrequired | string | Target webpage URL to fetch and distill (or builtin://stripe-docs) |
| html | string | Optional raw HTML string to distill directly without fetching |
| mode | string | Distillation mode |
| query | string | BM25 focus query when mode=budget |
| max_tokens | integer | Strict token budget ceiling when mode=budget |
Output
Schema · Response
| Field | Type | Description |
|---|---|---|
| datarequired | object | Distilled Markdown, structured JSON tables/metadata, skeleton outline, or BM25 budget excerpt. |
| cache | object | |
| statusrequired | string | Execution status ('ok') |
| billing | object | |
| roi_proofrequired | object |
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