The 10-app Codex stack we'd ship for customer support
Codex is OpenAI's coding agent. For technical support that reproduces bugs in code, pair it with Intercom and the rest to close the loop.
Why connect apps to your AI
Codex is OpenAI's coding agent. For technical support engineers who reproduce bugs in code and file them back to engineering, the leverage comes from connecting it to the support stack too.
Composio handles the wiring. Below are the ten apps that pay back the fastest for support teams running on Codex.
10 best apps for Codex + customer support
Ranked by leverage. The order matters — start at the top, get one win, then add the next.
1. Zendesk
The system of record for most support teams. Codex can triage incoming tickets, draft replies in your brand voice, escalate to the right team, and surface trends across customer conversations.
The Zendesk toolkit reaches tickets, users, organizations, macros, views, and the help center. Your agent can triage incoming tickets, draft replies in your brand voice, escalate to the right team, and surface trends across customer conversations.
A few things you can do with Zendesk and Codex once it is connected:
- Triage today's queue: tag, assign, and prioritise every new ticket
- Find every ticket about a specific feature and cluster them by sentiment
- Draft a reply in your brand voice using the closest matching macro
- Generate a weekly trend report from ticket categories and CSAT scores
2. Intercom
For teams running on Intercom. Codex can read full conversation histories, draft replies in your voice, and tag conversations for triage.
The Intercom toolkit covers conversations, contacts, companies, articles, and tags. Your agent can read full conversation histories, reply to customers, tag conversations for triage, search the knowledge base, and update company attributes with new context.
A few things you can do with Intercom and Codex once it is connected:
- Cluster the last 100 support conversations by theme
- Surface every paying customer's open conversation before a call
- Auto-tag conversations with which feature they're about
- Draft an article from a recurring support question
3. Freshdesk
For teams on Freshdesk. Codex can read conversation histories, update ticket properties, log time, and surface customer context.
The Freshdesk toolkit covers tickets, contacts, companies, agents, groups, and time tracking. Your agent can read full conversation histories, update ticket properties, log time, and surface the customer context behind every conversation.
A few things you can do with Freshdesk and Codex once it is connected:
- Triage the queue by customer tier and SLA proximity
- Pull all tickets from a single company and summarise the relationship health
- Update ticket fields in bulk after a product change
- Generate an agent-performance summary at the end of the week
4. Gorgias
For Shopify-based stores. Codex can pull a customer's full order history alongside their ticket and draft refund or exchange replies grounded in real order data.
The Gorgias toolkit covers tickets, customers, integrations, and macros for ecommerce-first support. Your agent can pull a customer's order history alongside their ticket, draft a refund or exchange reply, and route based on Shopify customer tags.
A few things you can do with Gorgias and Codex once it is connected:
- Pull a customer's full order history before drafting a reply
- Auto-tag every ticket about shipping with the right macro and assign
- Find tickets where the customer asked for a refund and surface the order
- Generate a weekly summary of return reasons by SKU
5. Linear
File bugs back to engineering directly from a customer conversation. Triage the customer-issue queue without leaving Codex.
The Linear toolkit gives your agent first-class access to issues, projects, and cycles — creating, updating, commenting, assigning, moving across states, and filtering by any combination of label, team, or workflow. It can also work with sub-issues, attachments, and project updates, which is what makes Linear useful as an agent's task surface.
A few things you can do with Linear and Codex once it is connected:
- Triage the inbox: tag, assign, and prioritise every new bug from the last 24 hours
- Draft a release-notes summary from issues that shipped this cycle
- Convert a Slack bug report into a well-scoped issue with reproduction steps
- Post weekly project updates with progress against the cycle goal
6. Jira
For orgs on Jira. File tracked bugs that engineers see in their normal queue, with the customer context attached.
The Jira toolkit handles issues, sub-tasks, epics, sprints, comments, attachments, transitions, and custom fields, across both Cloud and Server. Your agent can run JQL queries, transition issues across the workflow, and update fields in bulk — with full respect for your existing permission scheme.
A few things you can do with Jira and Codex once it is connected:
- Move every story tagged 'ready' into the active sprint
- Convert a long customer email into an epic with sub-tasks
- Post a daily standup summary into Slack from JQL results
- Bulk-relabel issues based on which component they touch
7. HubSpot
Pull customer context, segment info, and deal status before responding. Useful for prioritising paid customers over free ones.
The HubSpot toolkit reaches every standard CRM object — contacts, companies, deals, tickets — plus engagements (emails, calls, meetings), lists, and properties. Your agent can run filtered searches, update deal stages, log activities, and bulk-update properties as your pipeline moves.
A few things you can do with HubSpot and Codex once it is connected:
- Find every contact in a target ICP segment that hasn't been touched in 30 days
- Log a call summary against the right contact and update next-step
- Build a list of accounts where the deal slipped two cycles in a row
- Auto-update lifecycle stage when a contact triggers a product event
8. Slack
Escalate to the right channel, summarise overnight queue, and route product feedback.
The Slack toolkit lets your agent read channels, threads, and DMs, post messages and rich blocks, manage reactions, schedule messages, search history, and work with users and channels. It supports both bot and user-token actions, so the same agent can post 'on behalf of' a workspace bot or a specific person.
A few things you can do with Slack and Codex once it is connected:
- Summarise everything posted to #engineering overnight
- Cross-post a launch announcement to ten channels with the right tone for each
- React to a customer complaint thread and DM the account owner
- Schedule a recap message to fire at 9am Monday
9. Notion
Where the knowledge base and support runbooks live. Codex reads the existing answer before drafting a new one.
Composio's Notion toolkit covers the full database and page surface — querying databases with filters, creating and updating pages, appending blocks, managing properties, and reading existing content. Your agent can search across the entire workspace, follow page hierarchies, and write back in the same Notion-block structure as the surrounding content.
A few things you can do with Notion and Codex once it is connected:
- Query the PRD database for everything tagged 'Q2' and summarise progress
- Create a meeting note page from a transcript with proper headings and toggles
- Update the status property on a row when a related GitHub PR merges
- Append daily standup blocks to a running team page
10. Gmail
For email-led support. Triage inbox, find similar past tickets, and draft replies in your voice.
The Gmail toolkit covers reading messages and threads, sending and replying, drafting, managing labels, and searching the mailbox with full Gmail query syntax. Your agent can triage thousands of messages, reply in your voice, and never lose track of the threads that actually need an answer.
A few things you can do with Gmail and Codex once it is connected:
- Triage today's inbox into reply-needed, FYI, and trash
- Draft a reply in your voice to a long thread with all the context above
- Find every email from a customer over the last quarter and summarise the relationship
- Set up a label-based workflow that auto-routes invoices to your bookkeeper
Frequently asked questions
- How does Codex talk to Composio?
- Through the OpenAI Apps SDK and Responses API. Composio exposes every connected app as a tool Codex can call.
- Will Codex reply to customers without my approval?
- No. Every tool call is surfaced in the conversation before it runs.
- Can I scope Codex to read-only on Intercom?
- Yes. Per-tool scopes let you keep Codex read-only on Intercom while allowing writes elsewhere.
- Can the same connections be reused with Claude or Cursor?
- Yes. Composio is provider-agnostic — the same connection works from Codex, Claude, Cursor, Windsurf, and any MCP-aware client.
