CornerstoneAPIintegration&MCPserver
Deliver real-time ATS faster, close sales deals sooner, and scale without an integration backlog.
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Add Cornerstone and 52 other pre-built ATS integrations
Real-time data to fuel countless ATS use cases
Power AI copilots, insights, predictive analysis, and automation with a modern integration infrastructure that scales alongside you.
Source Candidates
Enable users to source candidates and send updates back to their ATS.
Assess Candidates
Trigger assessments and send updates back to your users' ATS.
Promote Jobs
Enable users to post to multiple job boards and send updates to their ATS.
Unified API data-models and methods
69 Unified MCP tools
The modern Unified API platform, built differently
Real-time, pass-through
Every request hits the source API live. No caching, no sync jobs, no stale data — just on-demand API reads/writes with native and virtual webhooks for instant updates.
Zero-storage by design
We never store end-customer data. Traffic is stateless and regionalized (US/EU/AU), reducing compliance scope and eliminating data-at-rest risk.
One API, deeply normalized
360+ integrations, 23 categories... Unified objects, endpoints, scopes, and errors—plus raw payload passthrough when you need provider-specific fields.
Custom fields & objects
Go beyond shallow schemas. We support custom fields and read/write on custom objects (e.g., Salesforce) via unified metadata APIs.
AI-ready integrations
Built for AI products: real-time streams for RAG/embeddings and Unified MCP tools that securely grant LLMs controlled integration access.
Predictable pricing, no lock-in
Transparent usage-based pricing that scales with API volume—not customers. Own your credentials and migrate anytime.
Add a Cornerstone integration to your application in hours
1Test drive integrations
Effortlessly test API calls, explore endpoints, and try out the Cornerstone integration using synthetic data in our Sandbox environment.
2Authorize connections
Drop in our Authorization component with a single line of code. Your users can then connect and grant access to their Cornerstone data.
3Start making API calls
Use the Connection ID to interact with Cornerstone via our unified API. We handle maintenance and updates so you can focus on your product.
Seamless Auth, no extra work
Unified.to removes the complexity of authentication and authorization so you can focus on building your product, not managing auth flows. Our pre-built UI and flexible API handle everything in the background—no extra setup required.
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Integrate with all the major ats applications
Unified.to makes it possible to integrate once to a unified API to connect with all the applications your customers use, so you can train AI models, build advanced automation, and expand your market.
Start testing for free
Integrateonce,launchindays
With 368+ pre-built integrations and zero maintenance burden, Unified.to unlocks your team's integration potential, so you can unblock growth.