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Composio is the integration gateway that gives Ultron access to 250+ external services. You connect a service once — Composio handles auth, token refresh, API versioning, rate limit backoff, and schema normalization.

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What Composio handles

ConcernWhat Composio does
OAuth flowsFull OAuth 2.0 with PKCE, token storage, refresh
API versioningNormalizes schema differences across API versions
Rate limit backoffAutomatic retry with exponential backoff on 429s
Schema normalizationConsistent tool interface regardless of underlying API
Error handlingStructured errors returned to Ultron, not raw API errors

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What’s covered

Composio covers every major category: 
CRM & Sales          — Salesforce, HubSpot, Pipedrive, Close, Outreach
Productivity         — Google Workspace, Microsoft 365, Notion, Confluence
Project Management   — Linear, Asana, Jira, Monday, Trello, ClickUp
Communication        — Slack, Discord, Microsoft Teams, Intercom
Dev Tools            — GitHub, GitLab, Bitbucket, Vercel, Netlify, Sentry
Analytics            — PostHog, Mixpanel, Amplitude, Google Analytics
Finance              — Stripe, QuickBooks, Xero, Chargebee
HR                   — Greenhouse, Lever, Rippling, BambooHR
Design               — Figma, Canva, Miro
Infrastructure       — Cloudflare, AWS, Supabase, PlanetScale
Marketing            — Webflow, HubSpot Marketing, Mailchimp, Brevo
Automation           — Make, Zapier, n8n

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How it works in Ultron

The Composio MCP server loads in every Ultron sandbox session. When you ask Ultron to interact with any connected service, the tool call routes through Composio: 
You: "Update the Acme Corp deal stage in Salesforce to Proposal."
    ↓
Ultron calls: composio_salesforce_update_opportunity({ id: "...", stage: "Proposal" })
    ↓
Composio: validates auth, calls Salesforce API, returns result
    ↓
Ultron: "Done — Acme Corp deal stage updated to Proposal."
Connecting a Composio integration in settings doesn’t consume credits. Credits are consumed only when a tool call executes against the service.