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Clear out junk files and repair common Windows errorsFree Scan →Scan for outdated or missing drivers - takes under a minuteDriver Scan →To connect an applicant tracking system (ATS) to a recruiting automation platform, first check for a native integration. If one does not cover the workflow you need, consider a no-code connector, middleware, or a custom API and webhook integration. Before setup, confirm which records and actions are supported, how data will move, and what credentials and permissions the connection requires. Exact steps vary by the two products; the Greenhouse examples below illustrate options, not universal instructions.
Decide what the connection must do
Write down the systems involved and the outcome you want before choosing a connector. “Connect” does not necessarily mean that every record or field will synchronize. Define the specific records to move, the events that should start an automation, and whether data should move one way or in both directions.
- Set field ownership: Decide which system is authoritative for each field, such as candidate status or contact details.
- Define create and update behavior: Specify how the workflow should handle an existing candidate, a duplicate application, or a changed field.
- Limit the initial scope: Start with the records and actions necessary for the workflow rather than assuming a connector supports every ATS function.
Choose an integration route
Check both vendors’ integration directories and setup documentation. Compare the connector’s supported records, triggers, actions, plan or licensing requirements, permissions, sync direction, and support responsibilities. Greenhouse describes an integration ecosystem and an open API, but availability and coverage depend on the particular products and workflow.
| Route | When it may fit | What to check |
|---|---|---|
| Native or prebuilt integration | The vendors support the workflow you need. | Supported records and actions, plan access, permissions, sync direction, and who supports the connection. |
| No-code or low-code connector | A connector supports a mostly standard workflow. | Trigger timing, mapping controls, plan limits, scale, and how failures are monitored. |
| Custom API integration | Your workflow or data needs exceed prebuilt options. | Authentication, endpoints, rate limits, data model, error handling, security, and ongoing development and maintenance. |
| Webhooks with API reads or writes | You need event-driven handling and the ATS offers suitable subscriptions. | HTTPS, signature validation, event identifiers, payload completeness, retry behavior, and API access. |
For a custom Greenhouse integration, the vendor describes combining APIs and webhooks, and identifies middleware, a developer, and a mapping schema as common requirements. It names MuleSoft, Boomi, and Workato as middleware examples; those are options to evaluate, not endorsements. Greenhouse’s custom-integration overview explains the approach.
#1 Best Overall
Authorize the connection with the right access
Use the authentication method documented for the exact connector. The person setting it up may need an administrator or developer role, and the connection may require specific endpoint permissions. Grant only the access the workflow needs, and follow the vendor’s current instructions for storing and managing credentials.
Greenhouse connector examples
These requirements apply to the named connectors, not to every ATS integration:
Rank #2
- Ideal for Gifting
- Ideal for a bookworm
- Compact for travelling
- Zapier: Its Greenhouse setup article, updated April 10, 2026, requires a paid Zapier account, an active Greenhouse Recruiting account, permission to manage API credentials, and a Harvest API key with the required endpoint permissions. The article describes triggers, searches, and actions. See Greenhouse’s Zapier setup instructions and Zapier’s Greenhouse integration page for connector details.
- Make: Greenhouse’s Make integration documentation, updated August 18, 2026, describes OAuth 2.0 for Harvest API V3 and requires Greenhouse Developer permissions. It also describes real-time webhook triggers and mapping fields between modules. See Greenhouse’s Make setup guide.
Greenhouse’s API options serve different purposes rather than forming one interchangeable API. Its documentation covers Harvest, Job Board, Assessment, Ingestion, and Onboarding APIs. Greenhouse stated that Harvest API v1 and v2 would become unavailable after August 31, 2026; because that date has passed, consult the current Greenhouse developer documentation rather than assuming either version remains usable. For sourcing partners specifically, the Candidate Ingestion API supports candidate and prospect submission, retrieval of current candidate stage or status, and eligible jobs. It uses OAuth 2.0 or Basic authentication depending on the use case; it is not a general-purpose automation API.
Map the data and test the workflow
Before enabling a workflow broadly, map each field between systems and decide how records are matched, created, and updated. Check whether the connector’s trigger supplies all the data needed for the next action or whether it must fetch additional details.
- Configure the selected connector using its current vendor instructions and required permissions.
- Map the fields the workflow uses, including identifiers and status fields where applicable.
- Test representative new applications, candidates, and updates, including a case where a matching record already exists.
- Review the records created or changed in both systems. Confirm that values landed in the intended fields and that duplicates or updates behave as planned.
- Check how the connector reports failed steps, retries work, and handles rate limits. Expand the workflow only after its behavior is understood.
Connector-specific limits matter. Zapier’s Greenhouse setup article states a performance limitation of 100 jobs for that Zapier app and says API rate limits apply. That is a limitation reported for this connector, not a general Greenhouse limit; verify current documentation before relying on it.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Secure and maintain event-driven connections
Greenhouse documents webhooks that send JSON event payloads to a receiver by HTTPS POST. Its documentation describes a unique Greenhouse-Event-ID and a secret-key signature that the receiver can verify. Some event data may still need to be retrieved through an API, so check payload contents for the particular event and connector.
Rank #4
- Use HTTPS and validate the signature when the provider supplies one.
- Record event identifiers so your system can recognize repeated deliveries and avoid processing the same event twice.
- Confirm retry behavior with the relevant vendors; do not assume an event will be retried in a particular way.
- Monitor failures, credentials and permissions, API changes, rate limits, and changes to the recruiting workflow.
Greenhouse’s webhook documentation describes its event delivery details. Other ATS products may use different event formats, authentication, and retry rules.
Quick Recap
Best Value
- It can be a gift option
- Comes with secure packaging
- Helpful in various ways
What to confirm before launch
- The exact ATS and automation platform support the intended records, triggers, and actions.
- The connector’s plan requirements, permissions, and authentication method are acceptable.
- Field ownership, data direction, matching rules, and duplicate behavior are defined.
- Representative records and updates have been tested, and someone knows how to detect and resolve failures.
- Both vendors’ current documentation confirms applicable limits, security requirements, and support arrangements.
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