#MCP/Tool use

AIbig-arrow-on-the-screen (bigarrow) is a MIT-licensed macOS command-line tool and skill for Claude Code and Codex that draws arrows, boxes and text over any window. Clicks pass through, keyboard focus stays put, and each arrow removes itself after a set duration or when its agent process ends. The tool only points; it never clicks, types or captures the screen, and it requires no macOS permission to draw.

AIDex Horthy (@dexhorthy) posted only the words "he cook" on X, with no further detail. The post is a short reaction and does not describe a product, release, or result on its own. Background from the quoted post by @0xblacklight describes a serverless background agent that created a GitHub pull request from an issue.

AIAgentzon launches at agentzon.co as a checkout site for AI assistants, aggregating about 500 household essentials so far. Its founder says most AI assistant checkouts are poor because Amazon blocks assistants from shopping, and users can ask an agent to buy specific brands such as Colgate toothpaste. The site supports browser-use or API checkout, WebMCP, UCP and OpenAPI, and requires no accounts or API keys.

AISolo founder launches MoltSets, an API-only B2B contact database priced at $27/mo, claiming unlimited access, high quality, high coverage, high rate limits, and low pricing. The post says LinkedIn profiles across 47 million slugs are re-scraped every 3 days and emails re-validated every 3 days, with 15 cents per real-time carrier-verified mobile number through bolt-on plans.

AISyren Video, a new agentic video tool, learns preferred graphics, motion, and editing rhythm from a user's library and generates new videos from a prompt. Users refine the results through chat, and the tool is free to try in a browser or through Claude MCP, per the company's announcement. The post's author says the education sector is exploring it.

AISyren Video, a tool that learns from a library of existing videos, generates new videos matching their style, pacing, rhythm, and overall feeling. The post says this addresses a weakness of other models, which can only use one or two reference videos.

AINatura's Interface is a $99 smart ring that lets users ask AI agents to complete tasks with a finger press and also tracks heart rate, HRV, sleep, and activity. At launch it connects with Meta's Muse, Instinct, Grok Bot, Claude, ChatGPT, and more, with preorders expected next month and shipping slated for December or January. After a three- to six-month free period, Natura plans to charge a $9 monthly subscription.

AICurtain has introduced an MCP server that lets AI agents discover supported tokens, get quotes for V2, V3, or Dynamic Privacy routes, and prepare private swap transactions. The server can also track intent status and find permissionless keeper settlement opportunities. It never receives private keys or broadcasts deposits, as the user's wallet reviews and signs each prepared transaction.

AIA solo founder used Teamily AI, a platform where humans and AI agents share one group chat, to automate a multi-step project. A research agent analyzed the author's 20 most-saved posts, a writer agent drafted content, a web agent built a live website in Website Builder, and a custom Verification Editor agent blocked the launch twice over a misquoted Anthropic doc. The team can be saved as a Loop that reruns weekly and waits for human approval before publishing.

AITessl's Code Review defines review standards as skills in the repository, called lenses, routed to files by a repo-owned profile file. Because these team-visible standards are portable, lessons from review can feed back into code generation and maintenance, not only the next review.

AIVercel says Browserbase Search and Fetch tools are now available on AI Gateway, letting any model with tool calling search the web and read pages. Browserbase presents the tools as a way to reliably search and extract page contents through an existing Vercel plan.

AIStacklok, founded by Kubernetes creators Craig McLuckie and Joe Beda, has released Mecatl, an open source cloud-native harness for coding agents on GitHub. Mecatl keeps the agent loop separate from the client, model provider, state store, and execution environment, and moves tool calling, session management, and memory into manageable systems. The article also covers ToolHive, an MCP platform, and an AI Gateway that is not yet open sourced, with a commercial enterprise control plane tying the pieces together.

AIMastra Connect is a public beta that lets Mastra projects connect providers such as Linear, Notion, and Slack, giving agents and workflows ready-made tools. Connect launches with 23 providers, almost 900 tools, and 7 hosted MCP providers, and it is free to use on Mastra platform during beta. Developers can add connections via the CLI or dashboard, limit tools with glob filters, and call a provider's SDK directly with credential() when a tool is missing.

Why it matters: The post shows how connected services become agent tools, and how credentials and access limits are managed, which is useful for building agent workflows.

AIGumloop's Agent Browsers let agents perform browser-based tasks without an MCP or API, with the browser running on Gumloop's infrastructure rather than the user's desktop. The feature includes built-in account management with a vault, persistent browser profiles, 1Password integration, live viewing, and session replays. Users can also reuse their workflows.

AIAmpersand lets developers connect an AI agent to a customer's Salesforce by configuring object and field mappings. The platform then handles API calls, authentication, token refreshes, and retries, which the post presents as a major advantage given the difficulty of managing multiple Salesforce accounts.

AIAn unnamed developer has open-sourced OpenWork, a tool letting AI agents work directly on files on a user's computer. It supports cloud or local models and existing skills, plugins, and MCP servers.

AIEvery has launched the Every Agent, an agentic coworker that lives in Slack and helps teams delegate complex work and share AI experiments. It also sends personalized Frontier Alerts when new models or tools ship, and the company says it charges zero percent markup on tokens, so customers pay what Every pays.

AIEra, launched by Ofir Ehrlich's team, generates a complete simulated company spanning Salesforce, Slack, Jira, Zendesk, Gong, and Deel, plus cloud databases and storage. Agents interact with it through live MCP and API interfaces, and because Era generated the company, it knows the exact ground truth for testing and benchmarking. The post says the product is live today and free.

AIA post promotes an MCP server that lets an AI agent browse more than 12,000 venture capital investors for startup fundraising research. The server is available at investormatch.pro/mcp/public.

AIA tool can turn a one-line business description into a complete synthetic company spread across CRM, ticketing, Slack, files, emails, and call recordings. Developers can test agents against this connected data, then reset the company to its initial state and rerun the test when something breaks. The background post describes the product as Era, a free simulated enterprise that connects to Salesforce, Slack, Jira, Zendesk, Gong, and Deel through live MCP and API interfaces.

AIIn a business risk monitoring test by @edwardirby, the Jev judge matched the report quality of an ordinary LLM judge while missing no investigations, versus the LLM missing 5 of 11. The LLM's threat scores also flip-flopped from 0.35 to 0.68 to 0.50 on the same threat, while Jev was 250x cheaper and 3-6x faster.

AIVespper, a Y Combinator F24 startup, launches a DOCX MCP that lets agents edit Word files through HTML that a trained reconciler converts back to OOXML. On its 279-task internal benchmark, the company reports its MCP is 2.7–2.9x cheaper and 2.7–3.5x faster than Anthropic's DOCX skill, with higher pass rates. The post also lists current limitations, including no comment creation or reply, no image or video attachment, and no support for latent styles.

AIComfy Router is now live on the Comfy Developer Platform, giving developers one API to call frontier image, video, 3D, and audio models. Day one models include Seedance 2.5, MiniMax H3, Nano Banana Pro, GPT Image 2, Kling, and Black Forest Labs, and the provider for each job is selectable. Requests fail rather than silently switching providers, and inputs and outputs are deleted after 24 hours.

Why it matters: The post shows how one API key and a provider parameter let developers swap routes for media models without rewriting calls, with failed requests reporting the provider.

AISkillsync, a Y Combinator W26 company, launched a tool that converts AI chat sessions between coding agents, including messages, reasoning and tool calls. The conversion engine txcript is open source, and the local-first app runs on Mac with a CLI and MCP support. Only sessions shared into team workspaces leave the user's machine.

AIMireye, a Y Combinator S26 startup, launches an API and MCP server that supply AI agents with cited facts, property enrichment, tools, and change signals for any US location. The founder says a free tier of 5,000 credits is available with no card, and that his earlier site-screening app was dropped because customers wanted the underlying engine. Usage data cited in the post shows 311 of the 317 catalog fields are queried.