Integration
Connect Rex to OpenRegister
When Appraisal Created fires in Rex, your agent runs Get Company Contact Information in OpenRegister. Describe the whole flow and it is built, tested on every scenario and kept running.
What the catalog holds today. Ask for anything missing and your agent reads the API documentation and adds it.
Build solutions, not workarounds.
What do you want Rex and OpenRegister to do together?
Ask the assistant
Connect your AI client
Give your AI client this address.
https://mcp.apiant.aiOne connection does both: ask your client to act in an app once, or have it build an automation that keeps running. Any client that takes a remote MCP server. Nothing to install. Create your free account, then sign in once in your browser.
Set it up in your client
Claude Code
Run this in the directory you want to work in.
claude mcp add --transport http -s project apiant-ai https://mcp.apiant.aiStart Claude Code there, approve the server, and sign in in the browser page it opens.
Claude Code guide (opens in a new tab)Claude, web and desktop
Open Customize, then Connectors, then Add custom connector, and paste the address. On Team and Enterprise an owner adds it first.
Setup guide (opens in a new tab)Cursor
Add the address to your MCP configuration as a server URL. Cursor signs you in in your browser.
Setup guide (opens in a new tab)Zed
Open Settings, then AI, then MCP Servers, then Add Server, then Add Remote Server.
Setup guide (opens in a new tab)Codex and the ChatGPT desktop app
Open Settings, then MCP servers, then Add server, and choose Streamable HTTP. From the terminal, Codex takes the address with its own add command and then signs you in.
Setup guide (opens in a new tab)Any other MCP client
Paste the address where the client asks for a remote MCP server URL, and name the server apiant-ai where it lets you. APIANT's skills reach the client over the same connection.
Setup guide (opens in a new tab)Example flows
What Rex can start in OpenRegister
When Appraisal Created in Rex
then Get Company Contact Information in OpenRegister
Starting points drawn from the triggers and actions in the catalog today. Describe the flow you need, at any depth, and your agent builds it and tests every scenario before it ships.
Everything your agent can do with Rex and OpenRegister
Triggers and actions 14 triggers · 21 actions
- Appraisal Created
Triggers when a new appraisal is created in Rex.
- Calendar Event Created
Triggers when a new calendar event is created in Rex.
- Calendar Event Updated
Triggers when a calendar event is updated in Rex.
- Contact Created
Triggers when a new contact is created in Rex.
- Contact Updated
Triggers when a contact is updated in Rex.
- Contract Created
Triggers when a new contract is created in Rex.
- Contract Status Changed
Triggers when a Rex contract's status changes.
- Lead Created
Triggers when a new lead is received or created in Rex.
- Listing Created
Triggers when a new listing is created in Rex.
- Listing Published
Triggers when a Rex listing is published.
- Listing Sold/Leased
Triggers when a Rex listing is marked as sold or leased.
- Listing Updated
Triggers when a listing is updated in Rex.
- Note Created
Triggers when a new note is created in Rex.
- Property Updated
Triggers when a property is updated in Rex.
- Add Tag
Adds a tag to a Rex contact.
- Assign Lead
Assigns an existing Rex lead to a user.
- Create Lead
Creates a lead in Rex, optionally linked to a contact and listing and assigned to a user.
- Create Match Profile
Creates a buyer/renter match profile for a Rex contact.
- Create Note
Creates a note in Rex, optionally linked to a contact.
- Create Reminder
Creates a reminder in Rex for the record owner, optionally linked to a contact.
- Search for Full Calendar Event
Returns the latest full data for a Rex calendar event by its ID.
- Find Company by Name
Returns German companies whose current or historical registered name matches the specified name.
- Find Company by URL
Finds the German company behind a website URL and returns its company ID plus the email, phone and VAT ID found on the site.
- Find Insolvency Proceedings
Returns German insolvency proceedings (companies and natural persons) that match a free-text search and/or structured filters.
- Find People by Name
Returns people from the German commercial register whose name matches the search text, optionally narrowed by city, date of birth or active status.
- Get Company Contact Information
Retrieve contact information for a German company: email, phone, VAT ID and the source web page.
- Get Company Details
Returns the full register record of a German company by its OpenRegister ID.
- Get Company Financials
Retrieves a company's published financial reports (balance sheets and income statements) and key financial indicators from the Bundesanzeiger.
- Get Company Historical Owners
Retrieves the full ownership history of a German company (GmbH only) across every shareholder list it has filed.
- Get Company Holdings
Retrieves the list of companies that a German company owns or has stakes in, including relation type and share amounts. Costs 10 OpenRegister credits per call.
- Get Company Owners
Retrieves the shareholders and owners of a German company, with their ownership percentages, nominal shares and register roles.
- Get Company Ubos
Retrieves the Ultimate Beneficial Owners (natural persons who ultimately own or control the company) of a German company, calculated across the full ownership chain. Costs 25 OpenRegister credits per call.
- Get Insolvency Proceeding
Retrieve the full record of a single German insolvency proceeding, including its status, debtor, administrator, deadlines, distribution figures and complete event history.
- Get Person Details
Retrieve detailed information about a person listed in the German commercial register: name, date of birth, age, city, and their current and past management positions across companies.
- Get Person Holdings
Retrieve the company holdings (ownership stakes) associated with a specific person by person id.
No trigger or action matches that. Ask your agent to add it: it reads the API documentation and builds what you describe.
Each app on its own
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Questions
Rex and OpenRegister, answered
What can start an automation from Rex?
Any of Rex's 14 triggers in the catalog, including Appraisal Created, Calendar Event Created, Calendar Event Updated and Contact Created. Describe the moment in plain language and your agent picks the right one.
What can your agent do in OpenRegister when something happens in Rex?
Any of OpenRegister's 14 actions, including Find Company by Name, Find Company by URL, Find Insolvency Proceedings and Find People by Name. Your agent maps the data both ways and tests every scenario before it ships.
Can it also run from OpenRegister to Rex?
OpenRegister has no triggers in the catalog today, so automations start in Rex. If you need the other direction, ask: your agent reads OpenRegister's API documentation and adds it.
Do I have to build a connector for Rex or OpenRegister?
No. Both are in the catalog with their triggers and actions. You describe the automation; your agent builds it, tests every scenario and keeps it running.
Can my AI client use Rex and OpenRegister without building an automation?
Yes. With your AI client connected to APIANT, ask it to do something in either app once and it runs that action on the spot. Ask for an automation and your agent builds it, tests every scenario and keeps it running. One connection covers both.
What happens when something fails?
Your agent works that out for you. It plans the failure paths along with the happy path, then tests every scenario before it ships.
Is there a free plan?
Yes. Every plan includes the agent, including free, and building from your own AI client spends no assistant credits.