Today's lead // official sources first
Stack Scout is a selective, source-led zine for builder infrastructure: APIs, MCPs, CLIs, services, workbench apps, and the lab tools we are building ourselves. It is curated rather than exhaustive, with visible dates and editorial badges instead of fake precision.
Lead signal
Keanu, OAuth re-sign-in and a crash fix This patch was brought to you by our team and our favorite contributors! Keanu Caution This will make you feel like a hacker A theme made by @andreynering 🎉 💻 Fixed! • Fixed a crash when parallel tool calls finish together, by @andreynering • Fixed OAuth sign-in and credential refresh, by @taciturnaxolotl • Ctrl+C…
At a glance
10 ecosystem tools
Current strongest public picks
Agent-ready protocol surfaces
Clearly labelled in-house tools
Curated ecosystem first, not an everything directory
Badges and freshness over fake precision scoring
Official links, update trails, and use-case context in one place
Featured tools this week
A rotating set of ecosystem tools that feel especially relevant right now.
Website / Websites
The strongest public hub for models, datasets, Spaces, open-source research, and fast-moving AI tooling infrastructure.
The April 2026 Hub changelog added Kernels and expanded agent traces, which keeps pushing Hugging Face deeper into agent-friendly infrastructure.
API / APIs
A frontier model API stack that increasingly optimizes for real agent workflows, tool use, and professional work products.
GPT-5.4 launched on March 5, 2026 with native computer use, tool search, and 1M-token context for longer-horizon workflows.
Web Service / Web Services
Workflow automation with a strong self-hosted story, useful AI integrations, and enough openness to stay flexible under real operator control.
The March 2026 release line kept moving quickly, while docs and blog coverage emphasized external secrets support and steady 1.12x releases.
MCP / MCPs
GitHub's official MCP server brings repositories, issues, pull requests, actions, and related workflows directly into agent loops.
The official server hit v1.0.0 on April 16, 2026, adding granular issue field tooling and formalizing MCP Apps feature-flag support.
Categories
Stack Scout works best when you enter through a workflow lane, not a random pile of names.
Public lane
Browser-first products and hubs that are useful on their own, not just as a wrapper around an API.
Public lane
Hosted workflow and automation platforms that carry real operational value without requiring a local runtime first.
Public lane
Platform surfaces for shipping structured AI, automation, and developer workflows.
Public lane
Model Context Protocol servers and bridges that turn static assistants into tool-using systems.
Public lane
Command-line tools that earn a place in a serious builder workflow.
Public lane
Focused public-facing applications that sit closer to products than infrastructure.
Public lane
Private or local-first desktop surfaces that are notable enough to track publicly.
Streaming activity
A lighter public activity stream sourced from official changelogs, release notes, blogs, and first-party repos.
Routed signal / Crush
Keanu, OAuth re-sign-in and a crash fix This patch was brought to you by our team and our favorite contributors! Keanu Caution This will make you feel like a hacker A theme made by @andreynering 🎉 💻 Fixed! • Fixed a crash when parallel tool calls finish together, by @andreynering • Fixed OAuth sign-in and credential refresh, by @taciturnaxolotl • Ctrl+C…
Routed signal / Goose
✨ Features Automatic thinking level operation for improved model reasoning #12237 Resume failed or cancelled delegate subagents #13015 Subagent session link in UI with view-only subagent sessions #12998 Limit concurrent subagents with GOOSE_MAX_CONCURRENT_SUBAGENTS #12946 Report session status via OSC 7501 in CLI #12928 Windows NSIS installer for desktop…
Routed signal / Superpower Daily
Gmail and calendar connections are available, while Japanese service partnerships are in development. Meta says users retain control over access and important actions.
From the lab
These sit alongside the broader ecosystem rather than replacing it.
Web App / Web Apps
A visual planning surface for boards, campaign flow, and creative work without the drag of a generic project manager.
Web App / Web Apps
A publishing planner built around image, video, and queue workflows rather than generic social-media posting dashboards.
Web App / Web Apps
A browser-based music studio path that brings programmable patterns, scenes, and samples into a clearer public-facing workflow.
Desktop App / Desktop Apps
A private, desktop-first notes tool with live sync ambitions and a workflow that stays close to the operator.
Collections
Curated paths that are easier to share than a raw filtered search link.
Use-case grouping
If you are building content systems, prototyping creative workflows, or stitching research into production, this is the first Stack Scout lane to start with.
Use-case grouping
A good starter set should teach you what MCP is actually useful for: repo intelligence, browser automation, and system-specific reach.
Use-case grouping
This collection is biased toward agents, orchestration, and production work rather than generic chatbot embedding.
Use-case grouping
These are not presented as the whole point of the site. They sit alongside the wider ecosystem and earn their place separately.