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Your Chief of Staff agent, Athena, is closing out the week: she updates a Notion page, drops a summary in Slack, and moves two Linear tickets — all in the tools your team already lives in. For her to reach any one of those, someone would normally have to register an OAuth app, handle token refresh, and keep the credentials safe — one integration at a time. Composio is how Apollo Space skips that work, so your agents act inside the apps you already run on and you never touch an SDK or a webhook.

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What it is

Composio is an OAuth-as-a-service layer for SaaS apps. Instead of each app requiring you to implement the integration from scratch (registering the app, handling token refresh, keeping credentials secure), Composio exposes a broad catalog of apps behind a single connection. Apollo Space uses Composio to connect your agents to the tools your company already runs on:
  • Athena reads and writes to your Notion, Slack, Linear, HubSpot, and more
  • Marcus can send email via Gmail (instead of Resend) when you want to keep the thread in your real inbox
  • Scout can search internal tools (Confluence, Notion) in addition to the public web

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Available toolkits

The full list is at composio.dev/apps. The most commonly used in the Apollo Space context:

Productivity

Notion, Confluence, Google Docs, Google Calendar, Asana, Trello, Linear, Jira, ClickUp, Monday, Airtable

Communication

Slack, Gmail, Outlook, Discord, Telegram, Microsoft Teams

Sales & CRM

HubSpot, Salesforce, Pipedrive, Zoho CRM, Calendly

Dev & Ops

GitHub, GitLab, Bitbucket, Vercel, Supabase, Sentry

Social & Marketing

LinkedIn, X (Twitter), Reddit, YouTube, Mailchimp, Canva

Commerce

Stripe, QuickBooks, Shopify (coming soon)

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How to authenticate

Authentication goes through the app’s own OAuth, brokered by Composio:
1

Choose the toolkit in Apollo Space

In Settings → Integrations, select the app you want to connect (Notion, Slack, etc.).
2

Apollo Space redirects you to the app's OAuth flow

Log in to the app (Notion, Slack, Gmail…) and authorize Apollo Space to read/write per the requested scopes.
3

Composio stores the encrypted token

The access token is stored encrypted in Composio. Apollo Space never sees the raw token — it only asks Composio to execute actions on your behalf.
4

Agents get access to the toolkit

From that point on, your org’s agents (Athena, Marcus, Scout, Digital Twins) can use that app’s tools — subject to each agent’s permissions.

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Scope: org vs. personal

Each Composio connection can be made in one of two scopes:

Org-level

The connection belongs to the organization as a whole. Any org agent can use it. Example: the company Slack account used by operational agents.

Personal

The connection belongs to a specific user — only agents operating “on their behalf” (including that user’s Digital Twin) can use it. Example: a leader’s personal Notion, accessible only to their Twin.
Apollo Space automatically selects the correct scope based on which agent is making the call — no accidental mixing of personal and org accounts.

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Automatic cost cap per toolkit

Composio charges for some toolkits per call (most are free — OAuth brokering only). To protect you from cost spikes:
  • Apollo Space tracks spend per (org, toolkit) over time
  • If the average cost per call exceeds a safe threshold, Apollo Space automatically pauses that org+toolkit combination
  • You’re notified and can review before reactivating
The goal: never arrive at a surprise bill because an agent looped on an expensive tool.

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What lands in your Stars wallet

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Known limitations

  • App OAuth quota — if the app enforces a 1,000-call/day limit, Apollo Space is subject to it too. There’s no way around it.
  • App schema changes — when a SaaS app updates its API, Composio needs to catch up. Apollo Space inherits that lag (rare, but it happens).
  • No non-OAuth apps — Composio only covers apps with public OAuth. Custom internal apps at your company require a custom tool.

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Next steps

Athena — Composio's primary user

The Chief of Staff runs day-to-day operations through Composio integrations.

Stars

How Composio usage feeds into billing.

Trust

How Apollo Space protects the credentials Composio stores.