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Web URL Prompt Compressor (BM25 Budget Control)
Web URL Prompt Compressor (BM25 Budget Control) is a paid API for AI agents from workflows.agentdiet.dev, paid per call via MPP, $0.001/call, status unknown (last checked 2026-10-21).
Fetches and distills any web URL or raw HTML into compact, agent-ready tokens using BM25-ranked extraction with configurable token budgets
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://workflows.agentdiet.dev/v1/prompt-compress)
Output
Returns a 'data' object containing the distilled content in the requested format (markdown text, structured JSON tables/metadata, skeleton outline, or BM25-ranked excerpt), plus ROI proof metrics showing raw token count, distilled token count, tokens saved, compression ratio percentage, estimated LLM cost saved in USD, and a ROI multiplier. Also includes cache hit/miss status and billing details.
Example use cases
Compress docs page for agent context
“Distill https://docs.stripe.com/api/charges into structured markdown so I can fit the key API reference into my prompt window without blowing my token budget.”
BM25-focused excerpt for research query
“Fetch https://en.wikipedia.org/wiki/Large_language_model and give me a budget excerpt focused on 'training data and scaling laws', capped at 300 tokens.”
Skeleton outline of a long article
“Get https://www.anthropic.com/research/claude-character and return a skeleton outline so I can see the high-level structure before deciding what to read in full.”
Technical details
Endpoint
GEThttps://workflows.agentdiet.dev/v1/prompt-compress?utm_source=zero.xyzWhen to prefer
Choose this endpoint when an AI agent needs to read web content but must stay within a tight token budget, or when LLM cost reduction from web browsing is a priority. It is especially useful over raw fetch-and-paste when the target page is long (documentation, articles, wikis) and only a focused excerpt is needed. Prefer it over generic scraping APIs when you need BM25-ranked relevance filtering, structured table extraction, or skeleton outlines rather than raw HTML or plain text.
Side effects
- URL is unreachable or returns non-200 — fetch error with status detail
- HTML too short or empty page — minimal or empty distillation returned
- max_tokens set below 20 — validation error rejected by schema
- mode=budget used without a query parameter — BM25 ranking may be unfocused
- Payment failure via x402 — 402 response if agent wallet is unfunded
- Rate limiting — repeated calls to same URL may be throttled
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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