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PopNx MCPMCP servers for people who use AI · explained in plain words

CATS MCP by usefulapi

by m190version 1.10.0i★ 1 (Stars for the whole repo)iRuns in the cloud
Registry nameio.usefulapi/cats-ats

How to install

What it does

Read CATS candidates, jobs and pipelines, and make explicitly confirmed recruiting changes.

  • Connects Runs in the cloud
  • Account or key No key needed
  • Category Docs, sheets & office work

Install

Pick the AI app you use, then copy the settings.

Passed 4/4 checks · What you ask goes through the maker’s server (cats-ats.usefulapi.io) · ✓ Commands checked Nov 13, 2026

First: which AI do you use?

Pick your app and the steps appear below.

Works with Claude · about 2 min

No key, nothing to install · Set it up once on claude.ai or the desktop app, then use it in chat · free accounts can add 1 · on Team/Enterprise an Owner adds it

  1. Open Claude’s Connectors page

    CustomizeConnectors

    CustomizeConnectors1Add2https://…3Add4
  2. Click “Add” → “Custom” → “Web” and fill in these 2 fields

    Copy each value into the field with the same name in Claude, then click Continue

    Name · NameCATS MCP by usefulapi
    Remote MCP server URL · Addresshttps://cats-ats.usefulapi.io/mcp

    Click Continue past the sign-in settings Claude detected · under Authentication choose what the maker says (Sign in now, Sign in when needed or No sign in), then click Add

  3. Turn it on in a chat

    +ConnectorsCATS MCP by usefulapi

  4. Try it

    Use CATS MCP by usefulapi and tell me what you can do for me, then show me one thing

    ✓ If Claude says it is using CATS MCP by usefulapi or shows a CATS MCP by usefulapi tool in the answer, you are connected

Menu names checked against Anthropic’s help page on Nov 11, 2026 · your screen may differ slightly by app version

Works with ChatGPT, depending on your plan

Full MCP: ChatGPT Business, Enterprise or Edu on the web · Pro: connects with read/fetch permissions, so tools that change data may not work · Plus: not confirmed in OpenAI’s docs; if you see an add-custom-MCP option on the Plugins page you can try these steps · web only

  1. Open ChatGPT’s add-MCP page on the web

    Plugins+Add custom MCP server

    ChatGPTPlugins1+2https://…3Create4
  2. Fill in the name and address

    Enter a name, paste the address under Connection, tick the risk warning and click Create as a plugin

    Name · NameCATS MCP by usefulapi
    Connection · Addresshttps://cats-ats.usefulapi.io/mcp
  3. Pick CATS MCP by usefulapi in a chat

    Start a new chat and pick CATS MCP by usefulapi from your plugins before typing

  4. Try it

    Use CATS MCP by usefulapi and tell me what you can do for me, then show me one thing

    ✓ If ChatGPT says it is using CATS MCP by usefulapi or shows a CATS MCP by usefulapi tool in the answer, you are connected

Menu names checked against OpenAI’s help page on Nov 11, 2026 · your screen may differ slightly by app version

Works with Claude Code · about 2 min

No key, nothing to install

  1. Open Terminal

    Mac: press Command+Space and type Terminal · Windows: open PowerShell

  2. Paste this command and press Enter

    claude mcp add --transport http --scope user cats-ats https://cats-ats.usefulapi.io/mcp
  3. Type /mcp in Claude Code

    You should see CATS MCP by usefulapi listed as connected

  4. Try it

    Use CATS MCP by usefulapi and tell me what you can do for me, then show me one thing

    ✓ If Claude Code says it is using CATS MCP by usefulapi or shows a CATS MCP by usefulapi tool in the answer, you are connected

Menu names checked against Anthropic’s help page on Nov 11, 2026 · your screen may differ slightly by app version

Works with Cursor · about 2 min

No key, nothing to install

  1. Click this button to open Cursor

    Open in Cursor

    Cursor asks you to confirm; click Install

  2. Open the AI chat in Cursor in Agent mode

  3. Try it

    Use CATS MCP by usefulapi and tell me what you can do for me, then show me one thing

    ✓ If Cursor says it is using CATS MCP by usefulapi or shows a CATS MCP by usefulapi tool in the answer, you are connected

Menu names checked against Cursor’s help page on Nov 11, 2026 · your screen may differ slightly by app version

Works with VS Code · about 2 min

No key, nothing to install

  1. Click this button to open VS Code

    Open in VS Code

    VS Code asks you to confirm; click Install

  2. Open the AI chat in VS Code in Agent mode

  3. Try it

    Use CATS MCP by usefulapi and tell me what you can do for me, then show me one thing

    ✓ If VS Code says it is using CATS MCP by usefulapi or shows a CATS MCP by usefulapi tool in the answer, you are connected

Menu names checked against VS Code’s help page on Nov 11, 2026 · your screen may differ slightly by app version

Other apps that use MCP, such as Windsurf, Zed or Gemini CLI, each add servers differently. See how in the app list.

See every app that uses MCP →

Address for apps that connect over the web

Addresshttps://cats-ats.usefulapi.io/mcp

JSON settings are under “For developers” below

Stuck? Ask people who use CATS MCP by usefulapi💬 Discussion →
For developers: Terminal commands and JSON settings

Over the web

Claude Code

claude mcp add --transport http --scope user cats-ats https://cats-ats.usefulapi.io/mcp

Cursor (~/.cursor/mcp.json)

{
  "mcpServers": {
    "cats-ats": {
      "url": "https://cats-ats.usefulapi.io/mcp"
    }
  }
}

VS Code (mcp.json)

{
  "servers": {
    "cats-ats": {
      "type": "http",
      "url": "https://cats-ats.usefulapi.io/mcp"
    }
  }
}

These settings are generated from the maker’s registry entry. If the README says otherwise, follow the README.

At a glance

GitHub starsi
1 (Stars for the whole repo)
This repo holds several MCP listings; its stars count once in rankings
Downloads per weeki
Not on npm/PyPI
Verified domain
✓ usefulapi.io
Connection
Runs in the cloud
Transport
streamable-http
Latest versioni
1.10.0
Published to registryi
Nov 12, 2026
Code last changedi
Nov 12, 2026
Maker
m190
Registry status
Active

Which apps can use it

Based on how this server connects and on each app’s own docs, checked Nov 10, 2026.

Connect over the internet in

ClaudeChatGPTGooseLM StudioMsty StudioCherry StudioCursorVS Code + GitHub CopilotVisual StudioWindsurf (Devin Desktop)ZedKiroClineContinueJetBrains AI AssistantClaude CodeCodex CLIGemini CLIOpenCodenodecodeWarpLibreChatOpen WebUIRaycast

All apps, with pros and cons →

Related guides

What it can do

Tool names and descriptions exactly as the server reported them on Nov 9, 2026. The maker wrote them, not us; we show them as plain text.

  • cats_get_site

    The CATS site (account) this API key belongs to: id, mode (recruiter or employer) and subdomain. GET /site.

  • cats_list_users

    List the CATS users (recruiters) with id, name, title and access level. Use the ids as owner or assignee. GET /users.

  • cats_list_candidates

    List candidates (personal data: name, emails, address, employer, skills, notes), one page at a time, max 100 per page. Use cats_search_candidates or cats_filter_candidates to find specific people. GET /candidates.

  • cats_get_candidate

    One candidate by id (personal data). GET /candidates/{id}.

  • cats_search_candidates

    Free-text search over candidates (name, email, skills, resume text...), paged. GET /candidates/search?query=.

  • cats_filter_candidates

    Filter candidates by fields (read-only, although it is a POST): first_name, last_name, title, emails.primary, address.city/state/postal_code, country_code, current_employer, key_skills, notes, dates (date_created, date_modified), owner_id, is_hot... Each condition is {field, filt

  • cats_list_candidate_pipelines

    The jobs a candidate is in the pipeline for, with rating, workflow and current status id. GET /candidates/{id}/pipelines.

  • cats_list_candidate_activities

    The activity log of a candidate (calls, meetings, notes, pipeline changes), paged. GET /candidates/{id}/activities.

  • cats_list_candidate_tasks

    Tasks attached to a candidate. GET /candidates/{id}/tasks.

  • cats_list_candidate_attachments

    File names, sizes and whether each file is a resume, for a candidate's attachments. Metadata only: file contents are never downloaded. GET /candidates/{id}/attachments.

  • cats_list_jobs

    List job orders with title, location, company, recruiter, status and workflow ids, dates. Paged. GET /jobs.

  • cats_get_job

    One job order by id, with its description. GET /jobs/{id}.

  • cats_search_jobs

    Free-text search over job orders, paged. GET /jobs/search?query=.

  • cats_list_job_pipelines

    The candidates in the pipeline of a job: pipeline id, candidate id, rating and current status id. Paged. GET /jobs/{id}/pipelines.

  • cats_list_job_statuses

    The statuses a job order can have (Active, OnHold, Closed...). GET /jobs/statuses.

  • cats_list_pipelines

    List candidate-to-job pipelines (candidate id, job id, rating, workflow id, status id), paged. GET /pipelines.

  • cats_get_pipeline

    One pipeline (a candidate on a job) by id. GET /pipelines/{id}.

  • cats_filter_pipelines

    Filter pipelines by id, candidate_id, job_id, status_id, rating, date_created or date_modified (read-only, although it is a POST). Each condition is {field, filter, value}. Paged. POST /pipelines/search.

  • cats_get_pipeline_status_history

    The status changes of a pipeline over time (status, who, when). GET /pipelines/{id}/statuses.

  • cats_list_workflows

    The pipeline workflows (sets of statuses such as Contacted, Interviewing, Offered). GET /pipelines/workflows.

  • cats_list_workflow_statuses

    The statuses of one pipeline workflow (id, title, prerequisites, triggers). Use the ids with cats_change_pipeline_status. GET /pipelines/workflows/{id}/statuses.

  • cats_list_companies

    List client companies (name, address, website, owner), paged. GET /companies.

  • cats_get_company

    One company by id. GET /companies/{id}.

  • cats_search_companies

    Free-text search over companies, paged. GET /companies/search?query=.

  • cats_list_contacts

    List client contacts (personal data: name, title, emails, company), paged. GET /contacts.

  • cats_get_contact

    One client contact by id (personal data). GET /contacts/{id}.

  • cats_search_contacts

    Free-text search over client contacts, paged. GET /contacts/search?query=.

  • cats_list_tasks

    List tasks (description, priority 1-5, due date, assignee, completion, the record it is about), paged. GET /tasks.

  • cats_get_task

    One task by id. GET /tasks/{id}.

  • cats_list_activities

    The site-wide activity log (calls, emails logged, meetings, notes) with the record each is about, paged. GET /activities.

  • cats_add_candidate_activity

    WRITE: Requires confirm:true. log an activity (a call, meeting, note...) on a candidate's record. It only records the entry in CATS: no email/SMS-send request is made, even for type 'email' or 'text_message'. Creates a new entry each time (not idempotent). POST /candidates/{id}/a

  • cats_create_task

    WRITE: Requires confirm:true. create a task in CATS, optionally about a candidate, contact, company or job and assigned to a user. Creates a new task each time (not idempotent); CATS may notify the assignee. POST /tasks.

  • cats_change_pipeline_status

    WRITE: Requires confirm:true. change the status of a pipeline (move a candidate to another stage of a job's workflow, e.g. Interviewing, Offered, Rejected). Get the pipeline id from cats_list_candidate_pipelines and the status id from cats_list_workflow_statuses. Requires confirm

  • cats_create_candidate

    WRITE: Requires confirm:true. create one candidate record (personal data) with name, optional contact details and notes. Refuses when CATS finds a duplicate (check_duplicate=true, the default). Creates a new record each time (not idempotent); no email-send request is made to the

Basic checksi

We check information anyone can see; we have not read the code. Checks that do not apply are left out of the count. · Checked Nov 13, 2026

  • ✓ Pass

    Maker matches the repo

    The registry name was verified against the domain usefulapi.io (the registry checks domain ownership)

  • ✓ Pass

    Still maintained

    Code last changed yesterday

  • – Not applicable

    Has a licence

    Not applicable: a cloud server run by the owner of usefulapi.io; you don't run code from the repo

  • ✓ Pass

    Endpoint responds

    Responded in 16 ms (HTTP 200)

  • – Not applicable

    Sign-in with OAuth

    No sign-in needed

  • ✓ Pass

    No hidden instructions in tool descriptions

    Read 34 tool descriptions and found no hidden instructions to the AI

Discussion

Ask, share a tip or report that it does not work. Sorted by what people marked helpful.

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User reviews

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Compared with others in Docs, sheets & office worki

  • More stars than 0% of the other 3841 servers in this category
  • Published to the registry more recently than 94% of the other 3841 servers in this category
  • Basic checks equal to or better than 100% of the other 3841 servers in this category

Compared with every active server in this category in the registry. Stars count only when the publisher owns the repo.

Common questions

Is CATS MCP by usefulapi safe?

It passed 4 of 4 applicable basic checks. We have not read the code. Before adding a key or token, see what access the server asks for and use a key with only the permissions you need.

What keys or codes does it need?

The registry does not list a required key, though some servers ask you to sign in on first use.

Does it run on my computer or in the cloud?

It runs in the maker’s cloud. Connect over the internet with nothing to install, but what you send passes through the maker’s servers.

Is it still maintained?

The GitHub repo last changed yesterday, and the latest version (1.10.0) reached the registry yesterday.

Which apps can use it?

Apps that support MCP, such as Claude Desktop, Claude Code, Cursor and VS Code. It connects by URL, so apps that accept remote MCP servers work too, such as ChatGPT on the web (full MCP on Business and above; Pro read-only).

What can I use instead?

In the same category: Puter MCP, XcodeBuildMCP, XcodeBuildMCP

Others in the same category

Servers in the same category from other makers, sorted by stars.

Reading a card:↓ Downloads per weeki★ GitHub starsiThree pillars: reviews · checks · usageiUpdated = latest version published to the registryi

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by HeyPuterWidely used★ 44.2KUpdated 5 months ago

Runs in the cloud✓ service owner · puter.com

XcodeBuildMCP

XcodeBuildMCP provides tools for Xcode project management, simulator management, and app utilities.

by getsentryWidely used↓ 130.5K/wk shared package★ 6.6KUpdated 4 months ago

Runs on your computer✓ service owner · xcodebuildmcp.com

XcodeBuildMCP

XcodeBuildMCP provides tools for Xcode project management, simulator management, and app utilities.

by cameroncookeWidely used↓ 130.5K/wk shared package★ 6.6KUpdated 14 months ago

Runs on your computer

README from the maker

Open the README

Copied from the maker’s repo as written. PopNx MCP has not reviewed or endorsed it. HTML, images and scripts are removed. Links lead off this site.

CATS MCP server

Connect

  • Claude (claude.ai, Desktop): open Customize → Connectors, click + Add → Add custom connector, and paste https://cats-ats.usefulapi.io/mcp.
  • Claude Code: claude mcp add --transport http cats-ats https://cats-ats.usefulapi.io/mcp, then run /mcp to log in.
  • VS Code: Add to VS Code.
  • Cursor and other clients: add the URL as a remote MCP server:
{

"mcpServers": { "cats-ats": { "url": "https://cats-ats.usefulapi.io/mcp" } } }

Add only the URL. Do not add an Authorization header or an API key to the client config: the server signs you in with OAuth, and the login page asks for your CATS credentials.

Step-by-step setup, where to find your credentials, and FAQ: https://usefulapi.io/cats-ats/

Tools

ToolTypeWhat it does
cats_get_sitereadGet CATS site
cats_list_usersreadList users
cats_list_candidatesreadList candidates
cats_get_candidatereadGet candidate
cats_search_candidatesreadSearch candidates
cats_filter_candidatesreadFilter candidates
cats_list_candidate_pipelinesreadList a candidate's pipelines
cats_list_candidate_activitiesreadList a candidate's activities
cats_list_candidate_tasksreadList a candidate's tasks
cats_list_candidate_attachmentsreadList a candidate's attachments (metadata)
cats_list_jobsreadList jobs
cats_get_jobreadGet job
cats_search_jobsreadSearch jobs
cats_list_job_pipelinesreadList a job's pipeline
cats_list_job_statusesreadList job statuses
cats_list_pipelinesreadList pipelines
cats_get_pipelinereadGet pipeline
cats_filter_pipelinesreadFilter pipelines
cats_get_pipeline_status_historyreadGet pipeline status history
cats_list_workflowsreadList pipeline workflows
cats_list_workflow_statusesreadList workflow statuses
cats_list_companiesreadList companies
cats_get_companyreadGet company
cats_search_companiesreadSearch companies
cats_list_contactsreadList contacts
cats_get_contactreadGet contact
cats_search_contactsreadSearch contacts
cats_list_tasksreadList tasks
cats_get_taskreadGet task
cats_list_activitiesreadList activities
cats_add_candidate_activitywriteAdd an activity (note) to a candidate
cats_create_taskwriteCreate a task
cats_change_pipeline_statuswriteMove a candidate to another pipeline status
cats_create_candidatewriteCreate a candidate
cats_usage_statusmetaUsage status (free-tier meter)
cats_request_featuremetaRequest a missing feature
cats_upgrademetaUpgrade to Pro or Pro+
cats_cancel_subscriptionmetaCancel the Pro subscription

read tools are read-only; write tools mutate data (clients should confirm them); meta tools report usage, manage your subscription or send a feature request.

Pricing

PlanPriceLimit
Free (per connected CATS site)$050 tool calls / month
Pro (per connected CATS site)$9/mo or $90/yr (2 months free)Unlimited*

\*Pro has a fair use limit of 10,000 tool calls a month on this server. For more, write to support@usefulapi.io.

Pro covers this server only. Subscribe with cats_upgrade (it returns a Stripe Checkout link). Cancel any time with cats_cancel_subscription: Pro continues to the end of the paid period, with no refund for the current period, and running cats_upgrade before then undoes the cancel. Or write to support@usefulapi.io.

License

MIT

Access, personal data and limits

Create a v3 API key in CATS under Administration → API Keys. Legacy Transaction Codes do not work. The generation form offers no read-only scope selector. Authorize UsefulAPI and your selected AI client to process only data you are entitled to share. CATS account eligibility and vendor charges remain separate from UsefulAPI plans. This independent connector makes no claim of vendor approval or endorsement.

Candidate/contact records contain personal information. Do not use this workflow for government IDs, health data, personal financial information or other CATS Prohibited Data. Known credential and sensitive financial/health fields and HAL link blocks are filtered; customers must still review free text and custom fields. Tool results reach your chosen AI client and LLM provider, whose privacy and retention policies also apply. Revoke the API key in CATS to stop vendor access; disconnect UsefulAPI to end this connection.

CATS documents a rolling 500 API requests/hour limit; its counter scope is not specified. Collection pages default to 25, maximum 100. Authentication is capped at 10 seconds/64 KiB; operation replies at 30 seconds/8 MiB. Billing follows the verified CATS site ID, so rotation of a key within the same site keeps the account identity.

Changes and automation

All four writes require confirm:true: create a candidate, log candidate activity, create a task or change pipeline status. Assigned tasks may notify a user. No email/SMS-send request is made by an activity note, even when its activity type is email or text_message. Independently configured account automation and webhooks can still react to changes.

Pipeline moves read the workflow/status metadata, explicitly request every returned trigger be suppressed with fire:false, and send create_activity=false. An already-current status makes no write. Preflight reads are not an atomic lock, so concurrent changes remain possible; independent webhooks are not suppressed. No email delivery, delete, attachment download, bulk-export endpoint or webhook-management tool is exposed.

No vendor request is automatically replayed. Creates require the documented 201 and a matching Location record ID; inconsistent or uncertain acknowledgements are errors. Inspect CATS before retrying a write. Date-only task/activity dates are sent at midnight UTC.

Verification

The 34 vendor tools were checked against the current API reference and local mocks. Actual own-trial reads verified account identity and HAL response structures, including vendor-supplied sample records. No real customer recruiting records or business writes were tested. Current terms allow customer-directed third-party software, and the vendor publishes external API-key setup guidance; this does not assert CATS reviewed UsefulAPI.

References: API v3, terms, external-key setup.