Agent-scoped installs
Each listing installs as a remote MCP with a defined set of skills and a secret field for the host agent, so the integration stays attached to the agent that owns the task.
Agent Plugin Marketplace
Cosmic’s Agent Plugin Marketplace lets teams install vendor plugins onto the agent that owns the work. It supports remote MCP integrations, per-plugin skills, and host-agent sign-in for available listings.
What Agent Plugin Marketplace is
Agent Plugin Marketplace is Cosmic’s plugin catalog for installing vendor tools onto the agent that already owns the work. Each plugin is presented as a remote MCP integration with a small set of skills and a secret slot, so the relevant agent can use the external service without moving the task elsewhere.
The marketplace currently includes active listings for tools such as GitHub, Linear, Stripe, Cloudflare, Render, PostHog, Resend, Netlify, Sentry, Atlassian, Algolia, and Notion, along with a second group marked coming soon. The product is aimed at teams that want to route engineering, billing, deploy, content, search, and support-adjacent work to the right agent rather than a shared generic integration.
Features
Suggested host routing
The marketplace suggests a host agent for each plugin, but the user still chooses where it goes. That keeps the routing explicit rather than automatic.
Skill-specific access
Plugin pages list the skills that become available after install, such as GitHub releases, pull requests, and issues or Linear issues and cycles.
Host-side authentication
Several listings say the host agent signs in or stores credentials after install, including GitHub bearer tokens and Linear, Stripe, Cloudflare, Render, Netlify, Sentry, Atlassian, Algolia, and Notion sign-in flows.
Published availability status
The marketplace separates currently available plugins from coming-soon listings, giving users a clear view of what can be installed now and what is still pending review or OAuth support.
Common use cases
Engineering workflow support
Give an engineering agent access to GitHub or Linear so it can summarize releases, open or review pull requests, file issues, or inspect the active cycle without moving the work to a different agent.
Billing and operations tasks
Connect billing or commerce plugins such as Stripe so a finance- or operations-oriented agent can look up invoices, subscriptions, failed payments, or other account activity on the host tied to that work.
Deploy and infrastructure work
Install deploy and infrastructure plugins such as Cloudflare, Render, Netlify, or Vercel coming soon so a DevOps-focused agent can handle deploys, status, logs, DNS, cache purge, and environment settings in one place.
Content and discovery workflows
Use content and search plugins such as Notion, Algolia, or PostHog so a content or growth agent can work with pages, databases, reindexing, flags, insights, and errors on the appropriate host.
Support and CRM routing
Route support and CRM tools that are listed or coming soon, such as Intercom, Zendesk, HubSpot, and Slack, to the agent responsible for ticket clusters, notes, deals, search, or posting updates.
Pros and Cons
Pros
- Plugins are installed on the agent that owns the work, which keeps access aligned with the task and host context.
- Listings expose only the relevant skills for that integration, such as releases, pull requests, issues, cycles, deploys, or search.
- The marketplace distinguishes between available-now and coming-soon entries, making current coverage easy to check.
- Suggested host agents help teams decide where a plugin belongs before installation.
- The pricing page shows a free forever plan, so teams can start using Cosmic without an upfront payment barrier.
Cons
- Some listings are still marked coming soon, so the catalog is not fully open across every integration category.
- Several plugins require signing in or pasting credentials on the host agent, which adds setup steps after install.
- The source does not show a one-click universal install path; each plugin is tied to a specific host agent and skill set.
FAQ
How do plugin installs work?
The marketplace is for installing vendor plugins onto the Cosmic agent that already owns the work. The listing says each plugin is a remote MCP, a few skills, and a secret slot, and that nothing installs until you choose an agent.
Do I have to use the suggested host agent?
The plugin pages show that each listing is tied to a suggested host agent, but the user can choose a different agent. For example, GitHub suggests Marcus or Ponytail, and Linear suggests Marcus, while the page notes that the host signs in and the skills attach only to the host agent.
Are all plugins available now?
The source shows both available and coming-soon plugins. Available now includes GitHub, Linear, Stripe, Cloudflare, Render, PostHog, Resend, Netlify, Sentry, Atlassian, Algolia, and Notion; coming soon includes Intercom, Vercel, AWS Ship, Zendesk, HubSpot, Slack, Shopify, Figma, and Google Search Console.
What kinds of team workflows does the marketplace support?
The marketplace is built for team workflows where a specific agent handles a domain such as engineering, billing, content, search, or deploys. The plugin pages route each integration to a suggested host like Marcus, Claire, Kai, Ava, Nora, Elena, Leo, Priya, James, or Ponytail depending on the work.
Do plugins need authentication?
Some plugins require connecting the vendor account on the host agent after install. The GitHub, Linear, Stripe, Cloudflare, Render, Netlify, Sentry, Atlassian, Algolia, and Notion pages mention signing in or pasting credentials on the host, while others note OAuth connect coming soon on their upcoming listings.
Quick Facts
- Category
- AI agent marketplace
- Source domain
- cosmicjs.com
- Product type
- Vendor plugin marketplace for Cosmic agents
- Availability
- Available now and coming soon listings
- Pricing
- Free forever plan available; paid plans also listed
- Primary workflow
- Install remote MCP plugins on the agent that owns the work
Alternatives à Agent Plugin Marketplace
CreateOS Sandbox
CreateOS Sandbox is an isolated compute environment for running code and agent workloads inside Firecracker micro-VMs. It is designed for workflows that need machine-level isolation, private networking between sandboxes, and programmatic control through SDK, CLI, or MCP.
AakarDev AI
AakarDev AI helps teams manage AI provider access, project-level setups, logs, and analytics from one dashboard. It supports BYOK workflows and lists providers including OpenAI, Google Gemini, Anthropic, Groq, Mistral AI, and Perplexity AI.
Trigger.dev chat agent
Trigger.dev chat agent is a durable AI chat backend for developers building stateful conversations that can survive refreshes, crashes, and long-running turns. It connects with the AI SDK `useChat` flow and runs on managed infrastructure with no timeout on a turn.
ByteAsk
ByteAsk is a terminal-first AI coding agent for C and C++ that edits repositories and verifies changes with the real compiler, debugger, sanitizers, and tests before showing a diff. It offers a free tier plus paid plans, with editor connectors and zero-retention handling described in the source.
Lasso
Lasso is an ecommerce product data platform for enriching catalog records, processing supplier files, generating product content, and monitoring competitors. It combines a web app with a REST API, SDK, and MCP server for teams and developers.
Codex Plugins
Codex Plugins bundle reusable skills, app integrations, and MCP servers into workflows you can install in the Codex app or use from Codex CLI. They help extend Codex with connected-service tasks, reusable instructions, and shared team workflows.