How to integrate Ashby MCP with Codex

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Introduction

Codex is one of the most popular coding harnesses out there. And MCP makes the experience even better. With Ashby MCP integration, you can draft, triage, summarise emails, and much more, all without leaving the terminal or the app, whichever you prefer.

Also integrate Ashby with

Why use Composio?

Apart from a managed and hosted MCP server, you will get:

  • CodeAct: A dedicated workbench that allows GPT to write its code to handle complex tool chaining. Reduces to-and-fro with LLMs for frequent tool calling.
  • Large tool responses: Handle them to minimise context rot.
  • Dynamic just-in-time access to 20,000 tools across 1000+ other Apps for cross-app workflows. It loads the tools you need, so GPTs aren't overwhelmed by tools you don't need.

How to install Ashby MCP in Codex

Run the setup command

Run this command in your terminal to add the Composio MCP server to Codex.

Terminal

It will initiate the authentication in a browser window, authorize Codex to access your Composio account.

Composio authentication page

(Optional) Authenticate with OAuth

To authenticate manually, run the login command to open a browser window and authorize Codex to access your Composio account.

bash
codex mcp login composio

Verify the connection

Run codex mcp list to confirm Composio appears as a registered MCP server.

bash
codex mcp list

Codex App

Codex App follows the same approach as VS Code.

  1. Click ⚙️ on the bottom left → MCP Servers → + Add servers → Streamable HTTP:
  2. Fill the header and Key fields with { "x-consumer-api-key" = "ck_*******" }.
  3. The Key is the Composio API key, that you can find on dashboard.composio.dev
  4. Click on Authenticate and authorize Codex to your Composio account and you're all set.
Codex App MCP setup
  1. Restart and verify if it's there in .codex/config.toml
bash
[mcp_servers.composio]
url = "https://connect.composio.dev/mcp"
http_headers = { "x-consumer-api-key" = "ck_*******" }

What is the Ashby MCP server, and what's possible with it?

The Ashby MCP server is an implementation of the Model Context Protocol that connects your AI agent and assistants like Claude, Cursor, etc directly to your Ashby account. It provides structured and secure access to your recruiting data, so your agent can perform actions like managing job postings, tracking candidate progress, scheduling interviews, and generating hiring reports on your behalf.

  • Automated job posting management: Easily create, update, or close job listings across your organization with direct agent assistance.
  • Candidate pipeline tracking: Have your agent fetch, organize, and update candidate progress through every stage of the hiring process.
  • Interview scheduling and coordination: Let your agent schedule interviews, send calendar invites, and manage interviewer assignments to streamline the process.
  • Data-driven hiring analytics: Generate reports and insights about your hiring funnel, candidate sources, and time-to-hire with a simple agent request.
  • Centralized communication with applicants: Enable your agent to send status updates, feedback, or reminders to candidates, keeping everyone in the loop automatically.

Supported Tools & Triggers

Tools
Add Candidate to ProjectAdd a candidate to a project in Ashby.
Add Candidate TagAdd a tag to a candidate in Ashby.
Add Hiring Team MemberAdd an Ashby user to a hiring team at the application, job, or opening level.
Add User to Interviewer PoolAdd a user to an interviewer pool.
Add Opening JobAdds a job to an opening (job requisition) in Ashby ATS.
Add Opening LocationTool to add a location to an opening (job requisition).
Anonymize CandidateAnonymize a candidate by removing personally identifiable information.
Approve OfferApprove an offer or a specific approval step within an offer's approval process.
Archive DepartmentArchive a department by its unique identifier.
Archive Interviewer PoolArchive an interviewer pool in Ashby.
Archive LocationArchives a location or location hierarchy in Ashby.
Change Application SourceChange the source attribution of an application.
Change Application StageMove an application to a different interview stage in the hiring pipeline.
Create ApplicationCreate a new job application by associating a candidate with a job opening in Ashby ATS.
Create CandidateCreate a new candidate in the system.
Create Candidate NoteCreate a note on a candidate profile.
Create Candidate TagCreate a new candidate tag in Ashby for categorizing and organizing candidates.
Create Custom FieldCreate a new custom field in Ashby.
Create DepartmentCreate a new department.
Create Interviewer PoolCreate a new interviewer pool.
Create JobCreate a new job opening in Ashby ATS.
Create LocationCreate a new location or location hierarchy.
Create OfferCreate a new offer for a candidate in Ashby ATS.
Create OpeningCreate a new opening (job requisition) in Ashby ATS.
Create ReferralCreate a referral in Ashby ATS by submitting a referral form with candidate information.
Create Survey RequestGenerate a survey request and receive a survey URL to send to a candidate.
Create Survey SubmissionCreate a new survey submission for a candidate's application.
Get API Key InfoRetrieve information about the current API key, including associated organization, user details, and permissions.
Get Application InfoRetrieve detailed information about a specific application by its ID.
Get Candidate InfoRetrieve detailed information about a specific candidate by their ID.
Get Custom Field InfoRetrieve detailed information about a specific custom field by its ID.
Get Department InfoRetrieve detailed information about a specific department by its ID.
Get Feedback Form DefinitionRetrieve detailed information about a specific feedback form definition by its ID.
Get File InfoRetrieve the URL of a file associated with a candidate.
Get Interviewer Pool InfoRetrieve detailed information about a specific interviewer pool by its ID.
Get Interviewer User SettingsGet interviewer settings for a specific user by their ID.
Get Interview InfoRetrieve detailed information about a specific interview type by its ID.
Get Interview Stage InfoTool to fetch interview stage details by ID.
Get Job InfoRetrieve detailed information about a specific job by its ID.
Get Job Interview Plan InfoRetrieve the interview plan information for a specific job.
Get Job Posting InfoRetrieve detailed information about a specific job posting by its ID.
Get Location InfoRetrieve detailed information about a specific location by its ID.
Get Offer InfoRetrieve detailed information about a specific offer by its ID.
Get Opening InfoRetrieve detailed information about a specific opening (job requisition) by its ID.
Get Referral FormFetches the default referral form or creates a default referral form if none exists.
Get Survey Form DefinitionRetrieve detailed information about a specific survey form definition by its ID.
Get User InfoRetrieve detailed information about a specific user by their ID.
List Application Criteria EvaluationsRetrieve AI-generated criteria evaluations for an application.
List Application FeedbackRetrieve all feedback submissions for an application.
List Application Hiring Team RolesRetrieve all available hiring team roles for applications in the organization.
List Application HistoryRetrieve the complete history of stage transitions for an application.
List ApplicationsRetrieve a list of applications with optional pagination and sync-token filtering for incremental updates.
List ApprovalsRetrieve a list of approvals (offer approvals, job approvals, etc.
List Archive ReasonsRetrieve a list of all archive reasons.
List BrandsRetrieve a list of all brands for the organization.
List Candidate Client InfoRetrieve all client info records for a specific candidate with pagination support.
List Candidate NotesRetrieve all notes for a specific candidate in Ashby.
List Candidate ProjectsRetrieve all projects associated with a candidate.
List CandidatesRetrieve a list of candidates.
List Candidate TagsRetrieve a list of all candidate tags in your Ashby account.
List Close ReasonsLists all close reasons for jobs or openings.
List Communication TemplatesRetrieve a list of all communication templates.
List Custom FieldsRetrieve a list of all custom field definitions configured in Ashby.
List DepartmentsRetrieve a list of all departments in the organization.
List Feedback Form DefinitionsRetrieve all feedback form definitions from your Ashby organization.
List Hiring Team RolesRetrieve a list of possible hiring team roles in the organization.
List Interviewer PoolsRetrieve a list of all interviewer pools.
List Interview EventsRetrieves all interview events for a specific interview schedule.
List Interview PlansRetrieve a list of interview plans.
List Interview TypesList all interview types defined in Ashby.
List Interview SchedulesRetrieve a list of interview schedules.
List Interview Stage GroupsRetrieve a list of interview stage groups.
List Interview StagesRetrieve all interview stages for an interview plan in order.
List Job BoardsRetrieve a list of job boards.
List Job PostingsRetrieve a list of job postings.
List JobsRetrieve a list of all jobs from Ashby ATS (Applicant Tracking System).
List Job TemplatesRetrieve a list of all job templates from Ashby ATS.
List LocationsRetrieve a list of all locations.
List OffersRetrieve a list of job offers with their latest versions.
List OpeningsRetrieve a list of openings (job requisitions).
List ProjectsRetrieve a list of all projects.
List SourcesRetrieve a list of all candidate sources.
List Source Tracking LinksRetrieve all source tracking links configured in Ashby.
List Survey Form DefinitionsRetrieve a list of all survey form definitions from Ashby.
List Survey SubmissionsLists all survey submissions of a given survey type from Ashby.
List UsersRetrieve a list of all users in the organization.
Move DepartmentTool to move a department to another parent in the organizational hierarchy.
Move LocationTool to move a location to a different parent in the location hierarchy.
Remove Hiring Team MemberRemove an Ashby user from a hiring team at the application, job, or opening level.
Remove User from Interviewer PoolRemove a user from an interviewer pool.
Remove Opening JobRemove a job from an opening (job requisition) in Ashby ATS.
Remove Opening LocationTool to remove a location from an opening (job requisition).
Restore DepartmentRestore an archived department by its unique identifier.
Restore Interviewer PoolRestore an archived interviewer pool in Ashby.
Restore LocationRestores an archived location or location hierarchy in Ashby.
Search CandidatesSearch for candidates by email or name.
Search JobsSearch for jobs by title in Ashby ATS (Applicant Tracking System).
Search OpeningSearch for openings by identifier.
Search ProjectsSearch for projects by title in Ashby.
Search UsersSearch for an Ashby user by email address.
Set Custom Field ValueSet the value of a custom field for a given object (candidate, application, job, etc.
Set Custom Field ValuesSet the values of multiple custom fields for a given object in a single call.
Set Job StatusSet the status of a job in Ashby ATS (Applicant Tracking System).
Set Opening ArchivedSets the archived state of an opening.
Set Opening StateSet the workflow state of an opening (job requisition).
Start OfferCreate a new offer version instance for an in-progress offer process.
Start Offer ProcessStart an offer process for a candidate's application in Ashby ATS.
Submit Application FeedbackSubmit structured feedback for an application using a feedback form.
Transfer ApplicationTransfer an application to a different job position in Ashby ATS.
Update ApplicationUpdate an application's properties in Ashby.
Update Application HistoryUpdate the complete history of an application's stage transitions.
Update CandidateUpdate an existing candidate's profile information in Ashby ATS.
Update Job CompensationUpdate a job's compensation tiers in Ashby ATS.
Update DepartmentUpdate an existing department's information such as its name.
Update Interviewer PoolUpdate an existing interviewer pool's title or training requirements.
Update JobUpdate an existing job's properties in Ashby ATS.
Update Job PostingUpdate an existing job posting's details including title, description, and visibility status.
Update Location AddressUpdate the address of a location or location hierarchy.
Update Location External NameUpdate a location's external (candidate-facing) name.
Update Location NameUpdate a location's name.
Update Location Remote StatusTool to update a location's remote status.
Update Location Workplace TypeTool to update a location's workplace type (OnSite, Remote, or Hybrid).
Update OpeningUpdate properties of an existing opening (job requisition).
Update Selectable Values Custom FieldUpdate the selectable values for a ValueSelect or MultiValueSelect custom field.
Update User Interviewer SettingsUpdate interviewer settings for a user, including daily and weekly interview limits.

Conclusion

You've successfully integrated Ashby with Codex using Composio's MCP server. Now you can interact with Ashby directly from your terminal, VS Code, or the Codex App using natural language commands.

Key benefits of this setup:

  • Seamless integration across CLI, VS Code, and standalone app
  • Natural language commands for Ashby operations
  • Managed authentication through Composio
  • Access to 20,000+ tools across 1000+ apps for cross-app workflows
  • CodeAct workbench for complex tool chaining

Next steps:

  • Try asking Codex to perform various Ashby operations
  • Explore cross-app workflows by connecting more toolkits
  • Build automation scripts that leverage Codex's AI capabilities

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FAQ

What are the differences in Tool Router MCP and Ashby MCP?

With a standalone Ashby MCP server, the agents and LLMs can only access a fixed set of Ashby tools tied to that server. However, with the Composio Tool Router, agents can dynamically load tools from Ashby and many other apps based on the task at hand, all through a single MCP endpoint.

Can I use Tool Router MCP with Codex?

Yes, you can. Codex fully supports MCP integration. You get structured tool calling, message history handling, and model orchestration while Tool Router takes care of discovering and serving the right Ashby tools.

Can I manage the permissions and scopes for Ashby while using Tool Router?

Yes, absolutely. You can configure which Ashby scopes and actions are allowed when connecting your account to Composio. You can also bring your own OAuth credentials or API configuration so you keep full control over what the agent can do.

How safe is my data with Composio Tool Router?

All sensitive data such as tokens, keys, and configuration is fully encrypted at rest and in transit. Composio is SOC 2 Type 2 compliant and follows strict security practices so your Ashby data and credentials are handled as safely as possible.

Used by agents from

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