# Services from tempestars.vercel.app on Zero > tempestars.vercel.app serves 25 paid API services for AI agents, indexed by Zero. Each is callable per call with payment handled by Zero. Canonical page: https://www.zero.xyz/host/tempestars.vercel.app Live health (JSON, refreshed every minute): https://www.zero.xyz/host/tempestars.vercel.app/health.json ## Services - [Tempest AI Content Engine — Keyword Extraction](https://www.zero.xyz/c/tempest-ai-content-engine-keyword-extraction-e8176ebf/llms.txt): $0.15/call via x402. Extracts a specified number of keywords from a given block of text using AI - [Tempest AI FAQ Generator](https://www.zero.xyz/c/tempest-ai-faq-generator-531be0cd/llms.txt): $0.2/call via x402. Generates a set of frequently asked questions (FAQs) from provided content using AI - [Tempest AI Tagline Generator](https://www.zero.xyz/c/tempest-ai-tagline-generator-63268904/llms.txt): $0.2/call via x402. Generates short, punchy taglines for a given topic, with optional style and platform targeting - [Tempest AI Proofreader](https://www.zero.xyz/c/tempest-ai-proofreader-06c73ecf/llms.txt): $0.15/call via x402. Proofreads submitted text using AI, identifying and correcting grammar, spelling, punctuation, and style errors. - [Tempest AI Content Engine — Condense](https://www.zero.xyz/c/tempest-ai-content-engine-condense-7548022f/llms.txt): $0.2/call via x402. Condenses and summarizes a piece of text into a shorter version with configurable style and length - [Tempest AI Content Engine — Newsletter Roundup Generator](https://www.zero.xyz/c/tempest-ai-content-engine-newsletter-roundup-generator-6776c830/llms.txt): $0.3/call via x402. Generates a structured newsletter roundup on a given topic, tailored by tone, audience, and desired sections. - [Tempest AI Content Compose](https://www.zero.xyz/c/tempest-ai-content-compose-05f2d14c/llms.txt): $0.3/call via x402. Generates original written content from a prompt with configurable tone, style, length, and target audience - [Tempest AI Memo Composer](https://www.zero.xyz/c/tempest-ai-memo-composer-964d0338/llms.txt): $0.3/call via x402. Generates a professional memo or internal communication draft based on a specified purpose, recipient, tone, and context. - [Tempest AI Content Engine — Rewrite](https://www.zero.xyz/c/tempest-ai-content-engine-rewrite-0c0e4048/llms.txt): $0.2/call via x402. Rewrites existing text with a specified tone and style while optionally preserving the original meaning - [Tempest AI Paraphrase](https://www.zero.xyz/c/tempest-ai-paraphrase-a29855dd/llms.txt): $0.2/call via x402. Generates one or more paraphrased variations of a given text using AI - [Tempest AI Content Engine — Retone](https://www.zero.xyz/c/tempest-ai-content-engine-retone-792ccdd9/llms.txt): $0.2/call via x402. Rewrites a piece of text in a specified target tone (e.g. professional, casual, empathetic) while preserving meaning - [Tempest AI Content Engine — Clarify Endpoint](https://www.zero.xyz/c/tempest-ai-content-engine-clarify-endpoint-6338e0da/llms.txt): $0.2/call via x402. Simplifies and clarifies text to a specified reading level using AI - [Tempest AI Content Engine — Expand](https://www.zero.xyz/c/tempest-ai-content-engine-expand-1cd08c8d/llms.txt): $0.2/call via x402. Expands a short piece of text into a longer, fuller version using AI, with optional style and target length controls. - [Tempest AI Content Engine — Translate (Transpose)](https://www.zero.xyz/c/tempest-ai-content-engine-translate-transpose-592248f5/llms.txt): $0.2/call via x402. Translates text from one language to another using AI, with optional auto-detection of the source language. - [Tempest AI Article Generator](https://www.zero.xyz/c/tempest-ai-article-generator-aef1b02e/llms.txt): $0.3/call via x402. Generates a full-length SEO-optimized article on a given topic using AI, with configurable style, keywords, and word count - [Tempest AI Content Engine — Social Signal Generator](https://www.zero.xyz/c/tempest-ai-content-engine-social-signal-generator-d61e99fe/llms.txt): $0.3/call via x402. Generates a social media post on a given topic with a specified tone, tailored for a target platform (Twitter, LinkedIn, or Instagram) - [Tempest AI Content Engine — Marketing Copy Generator](https://www.zero.xyz/c/tempest-ai-content-engine-marketing-copy-generator-3132eb17/llms.txt): $0.3/call via x402. Generates AI-powered marketing copy for a product or service, tailored by style, audience, and platform - [Tempest AI Content Engine — Product Listing Generator](https://www.zero.xyz/c/tempest-ai-content-engine-product-listing-generator-42f68fe1/llms.txt): $0.3/call via x402. Generates AI-written product listing copy with configurable tone and length from a product name, details, and feature list. - [Tempest AI Content Engine — Group Classification](https://www.zero.xyz/c/tempest-ai-content-engine-group-classification-5b3079b7/llms.txt): $0.15/call via x402. Classifies text into user-defined categories using AI, as part of a broader 25-endpoint AI content engine - [Tempest AI Content Engine — Slug Generator](https://www.zero.xyz/c/tempest-ai-content-engine-slug-generator-f9baedb0/llms.txt): $0.15/call via x402. Converts a text string into a URL-friendly slug (lowercase, hyphenated) using AI-powered normalization. - [Tempest AI Content Engine — SEO Scorecard](https://www.zero.xyz/c/tempest-ai-content-engine-seo-scorecard-97ed88ea/llms.txt): $0.2/call via x402. Analyzes content against a target keyword and returns an SEO scorecard with AI-powered insights - [Tempest AI Content Engine — Spotlight Content Generator](https://www.zero.xyz/c/tempest-ai-content-engine-spotlight-content-generator-46da5e30/llms.txt): $0.2/call via x402. Generates a spotlight-style content piece (e.g. featured article or landing section) from a page title, optional keywords, and a brief description using AI. - [Tempest AI Content Engine — Press Release Dispatch](https://www.zero.xyz/c/tempest-ai-content-engine-press-release-dispatch-5b118132/llms.txt): $0.3/call via x402. Generates or dispatches AI-written press release content from a company name and announcement details - [Tempest AI Content Engine — Scaffold Endpoint](https://www.zero.xyz/c/tempest-ai-content-engine-scaffold-endpoint-58b44f06/llms.txt): $0.2/call via x402. Generates a structured content outline (scaffold) for a given topic with configurable depth and number of sections - [Tempest AI Content Engine — Pulse Endpoint](https://www.zero.xyz/c/tempest-ai-content-engine-pulse-endpoint-ba6fe34e/llms.txt): $0.15/call via x402. Analyzes and processes text using AI-powered content operations including composition, rewriting, translation, and refinement Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently. - [Zero catalog index](https://www.zero.xyz/llms.txt)