Building cool web tools

Ori Tzvielli • Peerlist

<h3>OnTopX402 is a unique public leaderboard where ranking is determined solely by the amount of money paid. Users can claim positions on the board by paying in USDC on either the Base or Solana networks. The system is designed for AI agents to climb the leaderboard unassisted. The current cost to claim the #1 spot is $6.</h3><ul><li>Rank by Money: Every row is a paid placement, ordered strictly by the amount paid.</li><li>No Accounts, No Keys: Streamlined process with no need for user accounts or API keys.</li><li>Bidding System: Bids on the same link accumulate, allowing users to increase their rank without starting over.</li><li>AI Agent Friendly: Designed for AI agents to interact and bid seamlessly, with support for commands via llms.txt.</li><li>Transparent Pricing: Clear indication of costs for each rank, with money spent on a rank not being refundable.</li><li>Featured Listings: Examples include orislist.com (SEO agencies), underscoredone.com (Pay-per-call APIs), and llmsdirectory.com (LLM best practices).</li><li>Direct Links: Listings link directly to the advertised site.</li><li>Open API: Access to rules, llms.txt, and openapi for programmatic interaction.</li></ul>The platform offers a straightforward way to gain visibility, with the bid amount directly correlating to the rank achieved. It emphasizes a no-nonsense approach, free from editors or complex algorithms, ensuring that money is the sole determinant of position.

On Top X402

<h3>Explore a curated directory of 115 websites that expose their tools to AI agents through WebMCP (browser-side Model Context Protocol). This platform allows you to search and filter these sites by category, making it easier to discover and utilize AI-powered tools. You can also submit your own website to be included in the directory for free. The directory currently lists 115 WebMCP-enabled sites and 317 tools that agents can call directly within the page. Discover tools across various categories including Developer Tools, Productivity &amp; Business, Commerce, Finance &amp; Crypto, Media, Design &amp; Creative, Social &amp; Communication, Travel, Health &amp; Fitness, Education, Personal, and Other. Each listing provides a brief description of the website and the tools it exposes, enabling seamless integration with AI agents.</h3><ul><li>Discover 115 WebMCP-enabled websites.</li><li>Access 317 tools callable by AI agents.</li><li>Browse and filter sites by 12 categories.</li><li>Submit your own website to the directory for free.</li><li>Understand the WebMCP protocol for browser-side AI agent tool integration.</li></ul>

WebMCP Directory

<h3>Discover verified SEO agencies with Ori's List. We leverage real Google Search Console data to rigorously assess an agency's ability to rank its own website, ensuring you can make hiring decisions based on concrete evidence rather than mere promises.</h3><ul><li>First-Party Data Only: Numbers are directly sourced from Google Search Console via read-only access, eliminating the use of third-party tools, estimates, or self-reported figures.</li><li>Weekly Re-verification: Each listing undergoes a weekly re-check of domain, permissions, and data. Listings with two failed checks are removed.</li><li>Unpurchasable Numbers: All verified agencies display the same first-party figures, regardless of their subscription plan. While Pro plans offer checks, links, and placement, they do not influence the reported numbers.</li></ul>Browse our directory of verified and growing agencies, including onescales.com, which provides SEO and Local SEO services for nationwide E-commerce and local service companies, and getplact.com, which helps B2B suppliers, manufacturers, and service providers build trust, gain visibility on Google and AI search tools, and generate qualified leads.Explore categories like AI SEO, E-commerce SEO, Local SEO, and SaaS SEO. Learn more about how verification works, view our FAQ, and discover newest and top-performing agencies.

Ori's List

<h3>Read, Search, and Export MBOX Files Online</h3>This tool allows you to open and read MBOX files directly in your browser without any software installation or uploads. It's ideal for handling exports from Google Takeout, Thunderbird, and Apple Mail.<ul><li>Privacy First: Your mail never leaves your computer. The entire process happens locally in your browser, ensuring your data remains private and is never sent to any server.</li><li>Powerful Search and Filtering: Easily search your messages by sender, subject, or date. Filter messages by specific date ranges, combine filters for precise results, and browse your mailbox in a familiar two-pane layout.</li><li>Versatile Export Options: Export your emails to various formats including CSV (for Excel, Numbers, or Google Sheets), PDF (for archiving or printing), and EML (to import back into other mail clients). You can also split large MBOX files into smaller ones.</li><li>Attachment Handling: View and download individual attachments with a single click. For bulk operations, extract all attachments from multiple messages into a single ZIP archive, with options to filter by file type (images, PDFs, documents).</li><li>Handles Large Files: Designed to manage enormous MBOX files, including those up to 50 GB or more, by reading them in small pieces rather than loading the entire file into memory.</li><li>No Installation Required: Simply choose an .mbox file or drag and drop it into the browser. No sign-up, download, or setup is necessary. Best experienced on desktop browsers like Chrome or Edge.</li><li>Free and Paid Tiers: Basic viewing and single message export are free. An optional one-time $29 unlock provides unlimited file size, bulk export capabilities in all formats, and full attachment extraction without any caps.</li></ul>How it works: Unlike other MBOX converters that require you to upload your entire email history to their servers, this tool processes your file entirely within your browser. Your data remains secure and private on your machine.

Read Mbox

<h3>Tools &amp; APIs for AI agents.</h3><ul><li>Pay on demand with no friction, accounts, API keys, or subscriptions.</li><li>Find a tool, pay on demand per usage, get the result, and continue.</li><li>All interactions are handled with a single HTTP request.</li></ul><h3>How it works:</h3><ol><li>Agent reads metadata: The agent receives an endpoint and an OpenAPI spec along with payment details.</li><li>Sees 402 response: The server returns an HTTP 402 status code with a signed payment requirement in USDC.</li><li>Signs &amp; pays onchain: The agent's wallet broadcasts a USDC microtransaction on the Base network, requiring no human intervention.</li><li>Gets the result: The server verifies the payment header and returns the API response.</li></ol><h3>Available APIs include:</h3><ul><li>CORS Header Checker: Verifies cross-origin permissions for a given URL and origin.</li><li>US CPI Data &amp; Inflation Report: Retrieves official US inflation numbers (CPI) for specific months or historical ranges.</li><li>HTTP Request: Makes real HTTP requests from the cloud and returns status code, headers, and body.</li><li>Bulk DMARC Record Lookup: Checks DMARC email security configuration for multiple domains.</li><li>DNS &amp; WHOIS Lookup: Retrieves all 13 DNS record types and WHOIS registration data for domains.</li><li>Domain Age Checker: Provides registration date, expiration date, age, and time remaining for domains.</li><li>Domain Availability Checker: Checks domain registration status using the RDAP protocol.</li><li>Hacker News Data Fetch: Retrieves Hacker News stories, jobs, polls, and comments by category or date.</li><li>Hashing, HMAC &amp; Checksum Suite: Computes cryptographic hashes, HMAC signatures, and verifies webhook signatures.</li><li>HTTP Status Code Checker: Checks the live status of URLs and detects redirects.</li><li>JSON Suite: Validates, repairs, converts, queries, and diffs JSON data.</li><li>Leetspeak Translator: Converts text to and from leetspeak.</li><li>Mortgage &amp; Loan Amortization Calculator: Calculates monthly payments and loan amortization schedules.</li><li>TCP Port Scanner: Scans host and port ranges to identify open ports and services.</li><li>Bulk QR Code Generator: Creates QR code images from lists of text or URLs.</li><li>SEO Data Extractor: Extracts key SEO fields from a webpage.</li><li>Shopify AI Rank Checker: Checks Shopify product rankings in AI shopping assistants.</li><li>Sitemap URL Extractor: Extracts all URLs from a sitemap.xml file.</li></ul>