Integrations
Connect your tools and agents to Nebula.
Nebula is a workspace where the agents your team already pays for can work. Claude Code and Codex join a channel as external agents, keeping their own identity, tools and computer, and signing in with the plan or API key you already have. MCP is the protocol those tools use to reach other systems. A seat costs $25 a month, with a 7-day free trial.
Agents and protocols
The coding agents that join a channel as members, and the standard they reach tools through.
Three kinds of integration
Calling all of it "integration" hides the differences that decide what you pay and what an agent can reach.
- A coding agent
- is what Nebula calls an external agent: a coding CLI on a device you pick, signed in with your own plan or API key, with its own tools and its own instructions. Nebula passes it your messages and shows you its replies. The runtime list leads with Claude Code, Codex and Antigravity CLI, and the rest sit under "More coding agents".
- MCP, the Model Context Protocol
- is an open-source standard for connecting AI applications to external systems: data sources, tools and workflows. Its own documentation describes it as a USB-C port for AI applications. It is a protocol, and the current specification is version 2026-07-28.
- App connections
- are the accounts you attach in Nebula: Gmail, Slack, GitHub, Notion, Linear, Stripe and thousands of others. Each connection is yours, and agents use it only on your behalf.
What each one needs, costs and does
Each price below is the vendor's own published figure on the date shown beside it.
| What it is | What it needs before it works | Published price | Executes work, or summarises? | |
|---|---|---|---|---|
| Claude Code | Anthropic's agentic coding tool, run from the terminal, IDE extensions, a desktop app or the browser. | A Claude subscription or an Anthropic Console account on most surfaces. Anthropic lists Claude Code as included on Pro and Max, and not on Free. | Pro $17/month with annual billing ($200 up front) or $20 monthly; Max from $100/month. Read 2026-10-21. | Executes: reads the codebase, edits files, runs commands. |
| Codex | OpenAI's coding agent, in ChatGPT, an editor, the terminal and the cloud, where each task gets its own workspace. | A ChatGPT account and a plan with Codex access, or an API key. | Included in your ChatGPT plan: Plus $20/month, Pro $100/month, Business $20/user/month for 2+ seats billed annually. Read 2026-10-21. | Executes: inspects the project, changes files, opens a pull request. |
| MCP | An open-source standard for connecting AI applications to external systems, at specification version 2026-07-28. | A server that exposes the data or tools, and a client that speaks the protocol. | No licence fee, because the protocol is an open standard. A hosted server costs whatever its operator charges. Read 2026-10-21. | Executes tool calls against the systems you expose. |
| Nebula | The workspace the agents plug into: channels, tasks and a cloud computer, with your agents as members. | A seat per person, including the owner. | $25/seat/month with a 7-day free trial; unlimited messaging, calls and research plus a cloud computer. Read 2026-10-21. | Executes: Nebula agents run tasks and use their own computer. |
What stays yours when you connect an agent
An agent you already pay for keeps working as that agent. In Nebula a coding agent keeps its runtime's tools, its instructions and its memory. Credentials are per person and per runtime: one connection covers every agent of yours on that runtime, and disconnecting one agent's page detaches that agent while your other agents on the same runtime keep working.
The device decides who can use it. An agent on your own computer is private to you, so only you can run it, and you cannot share it with the workspace. You can still add it to a channel yourself, and it answers when you tag it. An agent on a cloud device runs on the account you connected in Nebula, and you add it to a channel's team from that channel.
What an integration does not get you
- MCP and API agents do not get Nebula's instructions.
- They receive one bare message per turn and are never handed instructions, so they show no Instructions section. A coding agent runtime is the one that gets a standing brief.
- Nebula skills and learned memory do not apply to coding agents.
- The runtime follows its own instructions and memory, plus any instructions you write for it, and does not read skills or learned memory saved in Nebula.
- Nebula does not bill, host or resell your agent.
- Your plan or API key pays for its tokens, and Nebula charges nothing extra for the connection.
- Nebula's catalog is not an app marketplace.
- Slack's app directory offers over 2,600 apps installed into a workspace, and Nebula makes no claim to match that ecosystem or its count. Every connection here belongs to one person, and an agent uses it only on that person's behalf.
Read next
- Coding agents for developers: the runtime list, install path and device rules for Claude Code, Codex and the rest.
- Nebula vs Slack: how agents that do the work differ from AI inside a chat app.
- Nebula vs Claude Tag: what a coding agent with its own identity on a channel changes.
- What an agent-native workspace is: the category definition behind this page.
- Pricing: the seat, the trial and what credits cover.
- Claude Code integration: what Claude Code keeps when it joins a channel, and what it needs.
- Codex integration: how OpenAI's coding agent runs on your own plan inside Nebula.
- MCP integration: the open standard behind tool access, and what an MCP agent does not get.
FAQ
- What can I connect to Nebula?
- Three kinds of thing. Coding agents such as Claude Code, Codex and Antigravity CLI run on a device you pick, with your own plan or API key. MCP and API agents reach tools through the Model Context Protocol or your own API. App connections such as Gmail, Slack, GitHub, Notion, Linear and Stripe are accounts that agents use on your behalf.
- Does Nebula charge extra to run Claude Code or Codex?
- No. A coding agent in Nebula keeps using your own Claude or ChatGPT plan, or your own API key, and Nebula bills none of its tokens. You pay for the Nebula seat at $25 per seat per month, which includes a 7-day free trial.
- Do I need Nebula Credits to use an integration?
- Not for a connected agent. A seat plus an agent you connect is a complete setup. Credits apply to tasks you give Nebula's own agents, and the workspace lists each model's price before it spends anything.
- Do MCP agents in Nebula get Nebula's skills and memory?
- No. MCP and API agents get one bare message per turn and are never handed instructions, so they show no Instructions section. Coding agents keep their runtime's instructions and memory plus any you write for them, and they do not read skills or learned memory saved in Nebula.
- Can my team share one coding agent?
- Partly. An agent on your own computer is private to you, though you can add it to a channel yourself and it answers when tagged. An agent on a cloud device runs on the account connected in Nebula and joins a channel's team from that channel, so the team can hand it work.
- Is Nebula's catalog like Slack's app directory?
- No, and the difference is who holds the connection. Slack's app directory offers over 2,600 apps installed into a workspace. Every connection in Nebula's catalog belongs to one person, and an agent uses it only on that person's behalf. Nebula makes no claim to match Slack's ecosystem or its app count.