App Integrations

Connect

Connect Codex to any app using the Composio CLI. Stop generating text about what you could do - actually do it from the shell.

When to Use This Skill

Use this skill when you need Codex to:

• Send that email instead of drafting it
• Create that issue instead of describing it
• Post that message instead of suggesting it
• Update that database instead of explaining how

What Changes

Supported Apps

1000+ integrations including:

• Email: Gmail, Outlook, SendGrid
• Chat: Slack, Discord, Teams, Telegram
• Dev: GitHub, GitLab, Jira, Linear
• Docs: Notion, Google Docs, Confluence
• Data: Sheets, Airtable, PostgreSQL
• CRM: HubSpot, Salesforce, Pipedrive
• Storage: Drive, Dropbox, S3
• Social: Twitter, LinkedIn, Reddit

Setup

1. Install the Composio CLI

curl -fsSL https://composio.dev/install | bash

2. Log In

composio login
composio whoami

This opens a browser for authentication and lets you pick your default org and project. Use -y to skip prompts in automated flows.

3. Link the Toolkits You Need

composio link github
composio link gmail
composio link slack

Each command walks through OAuth once, then the connection persists.

Done. Codex can now drive any connected app from the shell.

Core Workflow

1. Know the tool slug? → composio execute
2. Don't know the slug? → composio search
3. Need clarification on inputs? → composio execute --get-schema or --dry-run
4. Toolkit not connected? → composio link <toolkit> and retry
5. Multiple steps needed? → composio run for workflows, composio proxy for raw API calls

Examples

Discover a Tool

composio search "create a github issue"
composio search "send an email" --toolkits gmail

Inspect Inputs Before Calling

composio tools info GITHUB_CREATE_ISSUE
composio execute GITHUB_CREATE_ISSUE --get-schema
composio execute GITHUB_CREATE_ISSUE --dry-run -d '{"owner":"acme","repo":"app","title":"Bug"}'

Send an Email

composio execute GMAIL_SEND_EMAIL -d '{
  "recipient_email": "sarah@acme.com",
  "subject": "Shipped!",
  "body": "v2.0 is live, let me know if issues"
}'

Create a GitHub Issue

composio execute GITHUB_CREATE_ISSUE -d '{
  "owner": "my-org",
  "repo": "repo",
  "title": "Mobile timeout bug",
  "labels": ["bug"]
}'

Post to Slack

composio execute SLACK_SEND_MESSAGE -d '{
  "channel": "engineering",
  "text": "Deploy complete - v2.4.0 live"
}'

Run Calls in Parallel

composio execute --parallel \
  GMAIL_FETCH_EMAILS -d '{"max_results": 2}' \
  GITHUB_GET_THE_AUTHENTICATED_USER -d '{}'

Chain Actions with composio run

composio run '
  const issues = await search("github issues labeled bug this week");
  const summary = issues.map(i => `- ${i.title}`).join("\n");
  await execute("SLACK_SEND_MESSAGE", {
    channel: "bugs",
    text: `This week’s bugs:\n${summary}`
  });
'

Load reusable workflows from a file:

composio run --file ./workflow.ts -- --repo composiohq/composio

Raw API Access (proxy)

When no dedicated tool exists, hit the authenticated API directly:

composio proxy https://gmail.googleapis.com/gmail/v1/users/me/profile \
  --toolkit gmail

composio proxy https://gmail.googleapis.com/gmail/v1/users/me/drafts \
  --toolkit gmail -X POST -H 'content-type: application/json' \
  -d '{"message":{"raw":"..."}}'

How It Works

1. You ask Codex to do something
2. Codex picks a slug via composio search or prior knowledge
3. CLI checks connection, prompts composio link if missing
4. Action executes against the real API and returns JSON to stdout

Configuration

Global flags:

• --log-level <all|trace|debug|info|warning|error|fatal|none>
• --help for per-command docs

Environment variables:

• COMPOSIO_API_KEY - auth credential (set for non-interactive use)
• COMPOSIO_BASE_URL - custom API endpoint
• COMPOSIO_SESSION_DIR - override artifact storage
• COMPOSIO_DISABLE_TELEMETRY=true - opt out of telemetry

Type-Safe SDK (Optional)

Generate typed client code when you want to call tools from an app rather than the shell:

composio generate ts    # TypeScript types
composio generate py    # Python types

Flags: -o <dir>, --toolkits <list>, --compact, --transpiled, --type-tools.

Troubleshooting

• Not logged in → run composio login
• Connection required for <toolkit> → run composio link <toolkit>
• Unknown slug → composio search "<what you want>" or composio tools list <toolkit>
• Bad inputs → composio execute <SLUG> --get-schema then --dry-run
• Action failed → check permissions in the target app

Full reference: docs.composio.dev/docs/cli

Local safety defaults

Use the minimum connected-app permissions needed. Inspecting is read-only; sending messages, creating issues, changing records, or invoking payments are external actions and require explicit confirmation with the exact account, destination, and payload.