CATSAPIintegration&MCPserver

Deliver real-time ATS faster, close sales deals sooner, and scale without an integration backlog.

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Add CATS 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.

ats

Source Candidates

Enable users to source candidates and send updates back to their ATS.

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ats

Assess Candidates

Trigger assessments and send updates back to your users' ATS.

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ats

Promote Jobs

Enable users to post to multiple job boards and send updates to their ATS.

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Unified API

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Unified MCP

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HRIS Employee

ATS Candidate

ATS Company

ATS Job

ATS Applicationstatus

ATS Application

ATS Activity

ATS Document

Passthrough

HRIS Employee

ATS Candidate

ATS Company

ATS Job

ATS Applicationstatus

ATS Application

ATS Activity

ATS Document

Passthrough

Your customer's data

on CATS

Unified API data-models and methods

HRIS Employee

list get

ATS Candidate

list get create update remove

ATS Company

list get create update remove

ATS Job

list get create update remove

ATS Applicationstatus

list

ATS Application

list get create update remove

ATS Activity

list create

ATS Document

create list get remove

Passthrough

get post put patch delete

253 Unified MCP tools

create an activity16 parameters

list all activities4 parameters

create a candidate21 parameters

list all candidates5 parameters

retrieve a candidate2 parameters

update a candidate22 parameters

remove a candidate2 parameters

create a job22 parameters

list all jobs5 parameters

retrieve a job2 parameters

update a job23 parameters

remove a job2 parameters

create a document9 parameters

list all documents4 parameters

retrieve a document2 parameters

remove a document2 parameters

list all applicationstatuses3 parameters

create an application13 parameters

list all applications6 parameters

retrieve an application2 parameters

update an application14 parameters

remove an application2 parameters

create a company8 parameters

list all companies5 parameters

retrieve a company2 parameters

update a company9 parameters

remove a company2 parameters

list all employees3 parameters

retrieve an employee2 parameters

list all activities2 parameters

get an activity2 parameters

update an activity6 parameters

delete an activity2 parameters

search activities3 parameters

filter activities6 parameters

get an attachment2 parameters

delete an attachment2 parameters

download an attachment2 parameters

parse a resume

list all backups2 parameters

create a backup2 parameters

get a backup2 parameters

list all candidates2 parameters

create a candidate26 parameters

get a candidate2 parameters

update a candidate24 parameters

delete a candidate2 parameters

authorize a candidate2 parameters

list pipelines by candidate4 parameters

list candidate tasks4 parameters

search candidates3 parameters

filter candidates6 parameters

list candidate phones4 parameters

create a candidate phone5 parameters

get a candidate phone4 parameters

update a candidate phone7 parameters

delete a candidate phone4 parameters

list candidate emails4 parameters

create a candidate email4 parameters

get a candidate email4 parameters

update a candidate email6 parameters

delete a candidate email4 parameters

list candidate custom fields2 parameters

get a candidate custom field2 parameters

list candidate custom field values4 parameters

get a candidate custom field value4 parameters

update a candidate custom field5 parameters

list candidate activities4 parameters

create a candidate activity6 parameters

list a candidate attachments4 parameters

upload a candidate attachment3 parameters

upload a resume3 parameters

list candidate work history4 parameters

create a candidate work history item10 parameters

get a candidate work history item2 parameters

update a candidate work history item10 parameters

delete a candidate work history item2 parameters

list all candidate lists2 parameters

create a candidate list2 parameters

get a candidate list2 parameters

delete a candidate list2 parameters

list all candidate list items4 parameters

create candidate list items3 parameters

get a candidate list item4 parameters

delete a candidate list item4 parameters

list applications by candidate4 parameters

get a candidate application4 parameters

list all candidate tags4 parameters

replace candidate tags3 parameters

attach candidate tags3 parameters

delete candidate tag4 parameters

get a candidate thumbnail2 parameters

change a candidate thumbnail4 parameters

list all companies2 parameters

create a company15 parameters

get a company2 parameters

update a company16 parameters

delete a company2 parameters

list company tasks4 parameters

search companies3 parameters

filter companies6 parameters

list company phones4 parameters

create a company phone5 parameters

get a company phone4 parameters

update a company phone7 parameters

delete a company phone4 parameters

list company custom fields2 parameters

get a company custom field2 parameters

list company custom field values4 parameters

get a company custom field value4 parameters

update a company custom field5 parameters

list company statuses2 parameters

get a company status2 parameters

change company status4 parameters

list company attachments4 parameters

upload a company attachment3 parameters

list all company lists2 parameters

create a company list2 parameters

get a list2 parameters

delete a company list2 parameters

list all company list items4 parameters

create company list items3 parameters

get a company list item4 parameters

delete a company list item4 parameters

list all company tags4 parameters

replace company tags3 parameters

attach company tags3 parameters

delete company tag4 parameters

list all departments4 parameters

add department3 parameters

get a department2 parameters

update department3 parameters

delete department2 parameters

get a company thumbnail2 parameters

change a company thumbnail9 parameters

list all contacts2 parameters

create a contact16 parameters

get a contact2 parameters

update a contact17 parameters

delete a contact2 parameters

list contact tasks4 parameters

search contacts3 parameters

filter contacts6 parameters

lis contact phones4 parameters

create a contact phone5 parameters

get a contact phone4 parameters

update a contact phone7 parameters

delete a contact phone4 parameters

list contact emails4 parameters

create a contact email4 parameters

get a contact email4 parameters

update a contact email6 parameters

delete a contact email4 parameters

list contact custom fields2 parameters

get a contact custom field2 parameters

list contact custom field values4 parameters

get a contact custom field value4 parameters

update a contact custom field5 parameters

list contact activities4 parameters

create a contact activity6 parameters

list contact statuses2 parameters

get contact status2 parameters

change contact status5 parameters

list contact attachments4 parameters

upload a contact attachment3 parameters

list all contact lists2 parameters

create a contact list2 parameters

get a contact list2 parameters

delete a contact list2 parameters

list all contact list items4 parameters

create contact list items3 parameters

get a contact list item4 parameters

delete a contact list item4 parameters

list all contact tags4 parameters

replace contact tags3 parameters

attach contact tags3 parameters

delete contact tag4 parameters

get a contact thumbnail2 parameters

change a contact thumbnail4 parameters

list all events starting after a timestamp 1 parameter

list all jobs2 parameters

create a job23 parameters

get a job2 parameters

update a job23 parameters

delete a job2 parameters

list pipelines by job4 parameters

list job tasks4 parameters

search jobs3 parameters

filter jobs6 parameters

list job custom fields2 parameters

get a job custom field2 parameters

list job custom field values4 parameters

get a job custom field value4 parameters

update a job custom field5 parameters

list job statuses2 parameters

get a job status2 parameters

change job status4 parameters

list job attachments4 parameters

upload a job attachment3 parameters

list all job lists2 parameters

create a job list2 parameters

get a job list2 parameters

delete a job list2 parameters

list all job list items4 parameters

create job list items3 parameters

get a job list item4 parameters

delete a job list item4 parameters

list applications by job4 parameters

get a job application4 parameters

list job application fields4 parameters

list all job tags4 parameters

replace job tags3 parameters

attach job tags3 parameters

delete job tag4 parameters

list all pipelines2 parameters

create a pipeline4 parameters

get a pipeline2 parameters

update a pipeline3 parameters

delete a pipeline3 parameters

filter pipelines5 parameters

list workflows2 parameters

get a workflow2 parameters

list workflow statuses4 parameters

get a workflow status4 parameters

get pipeline historical statuses2 parameters

change pipeline status5 parameters

list all portals2 parameters

get a portal2 parameters

list portal jobs4 parameters

submit6 parameters

publish portal job4 parameters

unpublish portal job4 parameters

get portal registration application2 parameters

submit portal registration application4 parameters

get site

list all tags2 parameters

get a tag2 parameters

list all tasks2 parameters

create a task5 parameters

get a task2 parameters

update a task7 parameters

delete a task2 parameters

list all triggers2 parameters

get a trigger2 parameters

list all users2 parameters

get a user2 parameters

list all webhooks2 parameters

create a webhook3 parameters

get a webhook2 parameters

delete a webhook2 parameters

get a work history2 parameters

update a work history10 parameters

delete a work history2 parameters

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 CATS integration to your application in hours

1Test drive integrations

Effortlessly test API calls, explore endpoints, and try out the CATS 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 CATS data.

3Start making API calls

Use the Connection ID to interact with CATS 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.

See documentation

React

React component React component source code

Trusted by global product companies and developers to power integrations for innovative AI and SaaS applications

5 stars on G2

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