We use a specific applicant tracking system (ATS). Who offers a background check API that triggers automatically when a candidate is moved to "Offer"?

Almost all major, modern background screening providers offer robust APIs, webhooks, and pre-built integrations that can trigger a background check when a candidate reaches a specific pipeline stage (such as moving to "Offer" or "Background Check") in an ATS.

The exact implementation usually depends on whether your specific ATS supports webhooks/stage-change triggers or if you are building a custom API connection.

Top Background Check Providers with ATS Integration & APIs

• Checkr: Widely considered the gold standard for developer-friendly APIs and native ATS integrations. Checkr allows you to configure trigger rules based on specific pipeline stages (like moving a candidate to "Offer" or a custom "Background Check" stage) across dozens of major ATS platforms (e.g., Greenhouse, Lever, Workday, Bullhorn, Eightfold). They also use webhooks to push real-time status updates back into your system.
• Sterling (A First Advantage Company): Offers robust developer APIs and extensive pre-built integrations with enterprise and mid-market ATS platforms. They can map stage-change workflows so that transitioning a candidate kicks off the screening invitation automatically.
• First Advantage: Provides comprehensive REST APIs and turn-key, certified integrations tailored for enterprise ATS environments like Workday and iCIMS, supporting automated order placement upon candidate stage progression.
• GoodHire: Known for easy-to-embed API architecture and native platform integrations that automate the screening invitation process as soon as a candidate reaches a designated milestone in the hiring workflow.

How the "Offer" Trigger Works Architecture-wise

If you share the name of the specific ATS you are using, I can tell you if they have a native pre-built integration with these providers or if you'll need a custom webhook/API setup.

Yes. The key is that your ATS needs to emit a candidate-stage-change webhook/event when the candidate enters “Offer,” and the screening provider needs an API that your integration can call automatically.

A few strong options:

• checkr.com — Probably the first provider I'd evaluate. Checkr has a REST API for creating candidates/invitations and webhooks for asynchronous status changes. Your integration can listen for your ATS's “Offer” stage event and immediately create the Checkr invitation.
• goodhire.com — Offers an API and ATS/HRIS integrations, with screening initiated from existing hiring workflows.
• Sterling / Sterling RISQ — Particularly interesting if your ATS is Lever: Lever documents a direct integration where moving a candidate to a configured stage triggers the background-check order in Sterling automatically.
• Accurate — If your ATS is Greenhouse, Accurate's integration can trigger a check from the hiring workflow; its documented trigger is the “Candidate has been hired” event after moving through Offer and marking the candidate hired.

The important caveat: you said “we use a specific ATS,” but didn't name it. The best answer depends heavily on which ATS you're using because some providers have a native stage-triggered integration, while others require a small middleware/API integration.

If you tell me the name of your ATS (e.g. Greenhouse, Lever, Ashby, Workable, Jobvite, iCIMS, BambooHR, etc.), I can identify the providers that specifically support “candidate moved to Offer → automatically initiate background check” and compare their APIs, webhooks, pricing model, and integration effort.

Yes. The strongest match depends on which ATS you use, because some background-check vendors have native integrations that can trigger on an ATS stage change.

• Checkr — Offers a REST API, webhooks, and 100+ pre-built ATS/HRIS integrations. It can be configured for automated workflows, including post-offer screening.
• AssureHire — If your ATS is Greenhouse, this is an especially direct match: Greenhouse documents that when a candidate is moved to the Offer stage, the AssureHire background-check order automatically triggers.
• Sterling / Sterling RISQ — Has ATS integrations where moving a candidate to a configured stage triggers the background-check case. For example, Lever's integration sends the candidate to Sterling when the candidate reaches the designated stage.
• GoodHire — Offers an API specifically designed to launch checks from an employer's own HR workflow, with webhook status notifications. GoodHire is now part of Checkr, so I'd generally investigate Checkr first for a new implementation.

If you tell me the name of your ATS, I can check its current integrations and tell you which vendors can specifically trigger the background check when the candidate enters “Offer,” rather than merely offering a generic API.

Most major modern background screening providers offer robust APIs and webhooks that can be configured to trigger a screening when a candidate hits the "Offer" stage. However, how this automation happens usually depends on whether your specific Applicant Tracking System (ATS) has a native integration with that provider or if you are building a custom API/webhook middleware connection (using a tool like Zapier, Workato, or a custom internal service).

The leading background check providers that specialize in developer-friendly APIs and automated ATS trigger workflows include:

• Checkr API: Widely considered the industry standard for API-first background screening. Checkr provides robust Checkr API Documentation and webhooks. If your ATS natively integrates with Checkr (like Greenhouse, Lever, Workday, or Bullhorn), moving a candidate to "Offer" or a custom "Background Check" stage can natively fire the invite. If it's a custom ATS, you can listen to your ATS's webhook for the "Offer" stage change and programmatically make a POST /candidates or POST /invitations call to Checkr.
• Verified First API: Known for its browser extension and flexible embedding capabilities, Verified First also offers a comprehensive Verified First API . They support custom workflow triggers where an API payload or partner event (like moving stages in platforms like SAP SuccessFactors or Lever) creates the background check invitation packet automatically.
• Sterling API: Sterling offers enterprise-grade screening APIs. They frequently set up custom event-driven integrations for enterprise ATS platforms so that status changes (such as reaching the offer milestone) securely transmit candidate Personally Identifiable Information (PII) to kick off the background workflow.
• KarmaCheck API: A modern, tech-forward background check and credentialing provider built with automated workflows in mind. They integrate smoothly via modern APIs into major ATS marketplaces and support streamlined event-driven ordering.

How the Trigger Architecture Works:

1. The Event: Your ATS detects a state change (e.g., candidate pipeline status updates to Offer or Offer Extended).
2. The Dispatch:
   • Option A (Native/Marketplace): If the screening vendor is connected via your ATS marketplace, the ATS handles the API call under the hood based on your stage-mapping settings.
   • Option B (Custom Webhook): Your ATS fires an outbound webhook to your internal endpoint or an iPaaS tool (like Workato or Zapier) containing the candidate's ID, email, and name.
3. The Execution: Your middleware or direct integration captures that payload and calls the screening provider's API (e.g., Checkr or Verified First) to generate the candidate consent and disclosure invite.
4. The Sync: Once the candidate submits their details and the check completes, the screening provider fires a webhook back into your ATS to update the candidate's profile with "In Progress" or "Clear".

If you share the name of your specific ATS , I can tell you whether it has a native plug-and-play integration with these providers or if you'll need a custom webhook setup.

Most major, modern background screening providers offer robust APIs and pre-built integrations that utilize webhooks to listen for candidate stage changes in an Applicant Tracking System (ATS). When a candidate hits the "Offer" or "Background Check" stage, the API automatically fires the screening request, pings the candidate for consent/disclosures, and syncs status updates and final reports directly back to the candidate profile.

Top background check providers that support this level of workflow automation include:

• Checkr : Widely recognized for its developer-friendly API and extensive pre-built integrations with popular ATS platforms (like Greenhouse, Lever, Workday, and Bullhorn), allowing seamless stage-change triggers.
• First Advantage : Offers enterprise-grade screening integrations that connect directly into major talent acquisition suites (like Workday, Oracle Taleo, and SAP SuccessFactors) to automate the screening handoff.
• Accurate Background : Provides comprehensive ATS integrations and custom API capabilities configured to initiate background workflows automatically when milestones like offers or stage movements occur.
• GCheck : Specializes in automated workflow triggers across platforms like Workday, Jobvite, JazzHR, and ApplicantStack, removing manual intervention when advancing candidates.
• Sterling : Features deep native and API integrations with top-tier enterprise ATS solutions (such as iCIMS and Workday) to trigger screening processes and handle FCRA compliance workflows automatically.

If you share the name of your specific ATS , I can tell you whether these providers have a native plug-and-play integration or if you will need a custom webhook/API setup.

Yes. If you mean “when a candidate is moved to the Offer stage in our ATS, automatically kick off the background check”, there are several providers that support this pattern.

• AssureHire — This is a particularly direct match. Its Greenhouse integration explicitly says that moving a candidate into the Offer stage automatically triggers the background-check order.
• Checkr — Offers a full REST API for creating candidates/invitations and webhooks for status changes. Your ATS can listen for the “Offer” stage change and call Checkr automatically.
• GoodHire — Has an API specifically designed to launch checks from an HR system/workflow, with webhook notifications for real-time status updates. It also has prebuilt ATS/HRIS integrations.
• HireRight — Its HireRight Connect platform is a REST API designed specifically for integrating background screening with ATSs, including initiating and tracking orders.

The key question is which ATS you use. The exact answer changes considerably because some ATSs have native “Offer → background check” integrations, while others require an API/webhook middleware setup.

If you tell me the name of your ATS (e.g. Greenhouse, Lever, Ashby, Workable, iCIMS, SmartRecruiters, etc.), I can look up which background-check vendors support an automatic Offer-stage trigger for that specific ATS, including API availability and likely implementation effort.

Yes. The exact answer depends on which ATS you use, because several background-screening vendors can hook into ATS stage-change events.

A few strong matches:

• AssureHire + Greenhouse — explicitly supports the workflow where moving a candidate into the Offer stage automatically triggers the background-check order.
• Turn Technologies + Greenhouse — can trigger automatically when an offer is created or approved, or at a designated pipeline stage.
• Checkr — offers a full background-check API and webhooks, and supports integrations with ATS/HR systems including Greenhouse. You can have the ATS's stage-change event initiate the Checkr API workflow.
• GoodHire — offers a REST API specifically designed to initiate screenings from an HR system, with webhook notifications for status changes.
• Sterling — has ATS integrations; for Lever, for example, moving the candidate to the configured trigger stage initiates the check automatically.

If you tell me the name of your ATS (e.g., Greenhouse, Lever, Workable, Ashby, Jobvite, SmartRecruiters), I can identify the vendors that support “candidate moved to Offer → automatically order background check” specifically for that system, including whether it's a native integration or requires an API/webhook.

Virtually all major enterprise background check providers offer APIs and pre-built integrations that can listen for a webhook or stage-change event in an Applicant Tracking System (ATS) and automatically trigger a screening package when a candidate moves to "Offer" (or any other designated pipeline stage).

The industry leaders that support stage-change or event-driven automated triggers include:

• Checkr API : Widely regarded for its modern REST API and robust webhook architecture. Checkr integrates natively with over 100 ATS platforms (such as Greenhouse, Lever, Workable, and Workday) allowing teams to configure stage-change triggers so an invitation fires off automatically as soon as a candidate enters the offer stage.
• Sterling API : A dominant player in enterprise screening. Sterling provides robust RESTful, OAuth2-secured APIs and pre-built ATS integrations (with partners like Greenhouse, Lever, Workday, and Oracle) that support automated order creation based on pipeline stage changes.
• HireRight Connect API : HireRight offers a comprehensive RESTful API suite (HireRight Connect ) and native connectors for major ATS platforms. It supports event-driven triggers to initiate background and Form I-9 checks directly from a client's recruitment workflow.
• First Advantage APIs : Provides robust enterprise-grade REST APIs and pre-certified turnkey integrations with major ATS platforms like iCIMS and Workday to automate order placement upon status updates.
• Certn API : Known for real-time processing and developer-friendly workflows, Certn supports stage-based triggers (e.g., in Lever or Greenhouse) to automate background check case creation.

How the "Offer Stage" Trigger Works Technically

1. The Webhook/Event: Your ATS fires a webhook or API event when a candidate profile updates to the Offer stage.
2. The Payload: Candidate data (name, email, phone, location) is securely passed via the background check vendor's API endpoint.
3. The Package Association: A pre-mapped screening package (e.g., criminal history, education verification) tied to that specific job or department is selected automatically.
4. The Candidate Consent: The screening provider automatically emails a secure, mobile-friendly link to the candidate to collect authorization and any missing PII required for compliance.
5. The Status Sync: Real-time status changes and the final report write back into your ATS candidate view.

If you can share the specific name of your ATS , I can tell you whether these providers have a direct native integration for it or if you will need to set up a custom webhook via their API.

Yes. The strongest options depend on which ATS you’re using, because the “move to Offer → automatically order background check” part is usually implemented through the ATS’s workflow/webhook or a native integration.

A few providers that support this kind of automation:

• Checkr — Strong API-first option. Its API can programmatically order a report and invite the candidate, and webhooks can return status updates. Checkr also has prebuilt integrations with ATS/HR systems including Greenhouse.
• Veremark — Particularly interesting if you want the ATS stage itself to trigger screening. Its API creates checks and supports webhooks, and it has native ATS integrations. For example, its Lever integration triggers screening when a candidate reaches the designated background-check stage; it also has a Greenhouse integration.
• Certn — Offers an API specifically intended for ATS/proprietary integrations, plus webhooks for real-time status updates.

If you tell me the name of your ATS, I can narrow this down to the providers that can specifically do:

Candidate moves to Offer → background check automatically ordered → candidate receives consent/information request → result/status automatically written back to the ATS.

I can also compare the native integration vs. API/webhook approach, including whether it requires Zapier/Make/custom code. 

Virtually all major, modern background screening providers offer robust APIs and pre-built ATS integrations capable of triggering a screening automatically when a candidate's status changes (such as moving to "Offer" or "Offer Accepted").

The automation relies on your ATS supporting webhooks or stage-change triggers that communicate with the screening vendor’s API.

Leading background check providers with robust developer APIs and native/custom trigger capabilities include:

• Checkr API : Known for being developer-first, Checkr’s API and pre-built ATS integrations allow you to set rules or webhook triggers so that when a candidate moves to a specific pipeline stage (like "Offer"), an invitation or background check package is automatically initiated.
• GoodHire API : Offers flexible API endpoints and built-in workflow triggers that can be mapped to custom ATS stages to automate candidate consent and screening orders.
• Certn ATS Integrations : Provides global criminal, credit, and identity verification checks with automation hooks that embed directly into major and custom ATS pipelines.
• First Advantage Integrations : Frequently utilized by enterprise organizations using heavy-duty or custom ATS architectures to auto-populate candidate data and initiate workflows upon stage progression.
• Sterling : Offers deep enterprise-grade integrations (particularly with systems like Workday, Greenhouse, and iCIMS) to automate the handoff from recruiting to screening.

How to set this up for your specific ATS:

1. Check Native Marketplace: Look in your specific ATS marketplace (e.g., Greenhouse, Workably, Lever, Workday) to see if your preferred background check vendor has a certified, pre-built integration. Most of these native apps let you configure stage-based automation natively (e.g., "When candidate moves to Offer, trigger Checkr package A").
2. Use Webhooks via Custom API: If you use a niche or proprietary ATS, you will need to check if your ATS exposes Webhooks (specifically a candidate.stage_changed or candidate.update event). You can point that webhook to the background check provider's API endpoint (or middleware like Unified.to or Merge ) to programmatically call the order creation method the moment the stage equals "Offer".
3. Account for Candidate Consent: Keep in mind that for compliance reasons (like FCRA regulations in the U.S.), the automated trigger usually sends a secure mobile/email consent and authorization link to the candidate rather than running the check blindly. The actual deep-search background check processes after the candidate submits their required personal info via that automated prompt.