Propstack MCP server

Read Propstack contacts, properties, projects, deals, tasks, events; create and update CRM records. Hosted by usefulapi: connect it to Claude, ChatGPT, Cursor or any MCP client.

Connect Propstack50 free tool calls a month

What can I ask?

Turn on the Propstack connector, then ask in plain words. The AI picks the tools.

Which properties do we currently have for sale, with their prices?
Show my viewings scheduled for next week.
Which deals are in the negotiation stage of the sales pipeline?
Create a to-do for tomorrow: call Jane Smith about the flat on Oak Street.

What you can do with Propstack in Claude and ChatGPT

For real estate agents and brokers who manage properties and clients in Propstack.

List properties for sale or rent

The AI lists properties by status, marketing type (buy or rent), project or tag, with address, rooms, areas and prices.

See viewings and appointments in a time window

The AI lists calendar events in a time window with title, place, times and the linked contact and property.

Review deals by pipeline stage

The AI reads the deal pipelines and lists deals by stage or category, linking each contact to a property.

Look up, add or update a contact

The AI searches contacts or opens one, and creates a contact or updates the fields you name.

Changes data

Create or update a note, to-do or appointment

The AI creates a note, a to-do with a due date or an appointment, linked to contacts or properties, and can mark a to-do done or reschedule it.

Changes data

Create a deal or move it to another stage

The AI creates a deal that links a contact to a property in a stage, or moves a deal to another stage.

Changes data

How do I connect Propstack?

Before you connect

The login page asks for your Propstack API key.

An admin creates it in Propstack under Verwaltung → API-Schlüssel (crm.propstack.de/app/admin/api_keys) and sets its permissions there; give it only the access you need. The key is used only to call the Propstack API on your behalf and is never shown to anyone. Contact data is personal data: connect only if your AI client and its provider are covered by your data-protection agreements.

Claude claude.ai · Desktop

Open Customize → Connectors, then click + Add → Add custom connector.
Enter the name Propstack and this URL, then click Add:
https://propstack.usefulapi.io/mcp
Claude opens the login page: enter your Propstack API key.
In a chat, click + → Connectors and turn on Propstack.

Team and Enterprise: an Owner adds the connector for the organization first.

ChatGPT chatgpt.com

Open Plugins, click +, then Add custom MCP server.
Enter the name Propstack and this URL, choose OAuth as the authentication, confirm the warning and create it:
https://propstack.usefulapi.io/mcp
ChatGPT opens the login page: enter your Propstack API key.
In Plugins, install Propstack, then choose it in a chat.

No Add custom MCP server option? It depends on your account or workspace settings: see OpenAI's guide.

Claude Code

Run this command, then run /mcp in Claude Code to log in:

claude mcp add --transport http propstack https://propstack.usefulapi.io/mcp

Cursor

Add to Cursor or add this to ~/.cursor/mcp.json:

{
  "mcpServers": {
    "propstack": {
      "url": "https://propstack.usefulapi.io/mcp"
    }
  }
}

VS Code

Add to VS Code or add this to .vscode/mcp.json:

{
  "servers": {
    "propstack": {
      "type": "http",
      "url": "https://propstack.usefulapi.io/mcp"
    }
  }
}

Codex

Run these commands. The second one opens the login page:

codex mcp add propstack --url https://propstack.usefulapi.io/mcp

codex mcp login propstack

Other clients

Windsurf, Cline, Zed and other MCP clients: add this URL as a remote MCP server (Streamable HTTP). The client then opens the login page in your browser.

https://propstack.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: the login page asks for your Propstack API key. If the config has such a header, remove it: some clients then send that header instead of the login token, and every call fails with 401.

Pricing

Plan	Price	Limit
Free	$0	50 tool calls / month
Proper API key	$9/mo · $90/yr	10,000 tool calls / month
Pro+per API key	$39/mo · $390/yr	100,000 tool calls / month

Each paid plan covers this Propstack server only. Ask your AI to run propstack_upgrade and choose Pro or Pro+, billed monthly or yearly (it returns a Stripe Checkout link). If you already have Pro, ask to change it to Pro+. The change requires your confirmation, keeps your billing interval and charges the price difference for the rest of the period immediately. Cancel any time with propstack_cancel_subscription: your paid plan continues to the end of the paid period, with no refund for the current period, and asking to resume the same plan with propstack_upgrade before then undoes the cancel. Or write to support@usefulapi.io.

Tools 22

Show all 22 tools (the AI picks them for you)

Read only · 12

List or search contactspropstack_list_contacts
List or search CRM contacts (Kontakte). Returns business fields only (name, company, email, phone numbers, status, source, tags, owner, dates), never birth data, identity or tax numbers, income or portal tokens. Search by free text (name, email, address, phone), exact email, exact phone number, or filter by status, source, tag, owner and dates. Archived contacts are excluded unless archived is set.
Get contactpropstack_get_contact
One contact by id with address, salutation, language, notes, GDPR status, owner, status, source, tags, sub-contacts and owned properties. Birth data, identity and tax numbers, income and the portal token are never returned.
List or search propertiespropstack_list_properties
List or search properties (Objekte / units): address, type, marketing type (buy/rent), rooms, areas, prices, status. Images and owners are not returned. Filter by free text, status, tag, project, marketing type, object type, price and area ranges.
Get propertypropstack_get_property
One property (Objekt) by id: address, type, rooms, areas, prices, status and the description, location and furnishing texts (clipped). No images or owner.
List projectspropstack_list_projects
List projects (Projekte: a project groups several property units): title, project id, status, address, owner. Not paged; at most 200 are returned.
List dealspropstack_list_deals
List deals (a deal links a contact to a property and sits in a pipeline stage). Filter by pipeline, stage, category (qualified/unqualified/lost), contact, property, project or owner. Use propstack_list_deal_pipelines for stage ids.
List deal pipelinespropstack_list_deal_pipelines
List the deal pipelines with their stages (id, name, position, win chance). Use the stage ids to filter deals or to move a deal.
List activitiespropstack_list_activities
List the activity timeline (notes, tasks, appointments, e-mails, SMS, letters, rejections, inquiries) with title, linked contacts and properties, state and dates. Message and note bodies are not returned. Filter by type, contact, property, project, owner, category or date.
Get taskpropstack_get_task
One task by id (a note, to-do or appointment): title, body text (clipped), type, linked contacts, properties and projects (id and name only), due date or start/end.
List calendar eventspropstack_list_events
List calendar appointments (Termine, e.g. viewings) in a time window, with title, place, start/end, state and the linked contact, property and project (id and name only). Paged: follow next_page.
List userspropstack_list_users
List the users (staff, Nutzer) of the Propstack account: id, name, work email, position, phone, team. Use the ids as owner/broker filters.
Get reference datapropstack_get_reference_data
Look up the ids used by other tools: property_statuses, activity_types (note/task/appointment types, needed as note_type_id), contact_sources, reservation_reasons (rejection reasons), contact_tags or property_tags.

Changes data · 6

Create contactpropstack_create_contact
WRITE: create a CRM contact. Propstack matches on the email address: if a contact with the same email already exists it is UPDATED with the given fields instead of creating a duplicate. Consent flags (newsletter, contact permission, GDPR status) cannot be set here. Returns the contact id.
Update contactpropstack_update_contact
WRITE: change the given fields of an existing contact; fields not given stay as they are. Returns the updated contact (business fields).
Create note, to-do or appointmentpropstack_create_task
WRITE: create a note, a to-do (with due date) or an appointment (with start and end) in Propstack, linked to contacts, properties or projects. note_type_id is the activity type id (see propstack_get_reference_data activity_types). No e-mail or SMS is sent to the contact; the only mail is the reminder to the assignee when remind_at is set. Returns the new task id.
Update taskpropstack_update_task
WRITE: change the given fields of an existing note, to-do or appointment (for example mark a to-do done, move its due date, or reschedule). Fields not given stay as they are.
Create dealpropstack_create_deal
WRITE: create a deal linking a contact to a property in a pipeline stage (see propstack_list_deal_pipelines for stage ids). Returns the new deal.
Update dealpropstack_update_deal
WRITE: change the given fields of a deal, typically move it to another pipeline stage or update its note or price. Fields not given stay as they are.

Your usefulapi plan · 4

Usage status (free-tier meter)propstack_usage_status
Report the caller's current usage: the plan, calls used this month, the limit of the plan (the free monthly cap or the Pro fair use limit), remaining, and whether the limit is reached. Read-only; does not count against the meter.
Request a missing featurepropstack_request_feature
Tell usefulapi that the user needs something the Propstack tools cannot do yet (a missing tool, field or filter). Call it only when the user asks for something none of the tools can do, and tell the user that you send the request. Do not call it for errors or for normal requests. Do not include personal data, credentials or customer records. Stored with the product name and the client type (for example Claude or Cursor), without the user's account. At most 5 requests per day. Does not count against the meter.
Upgrade to Pro or Pro+propstack_upgrade
Get a paid plan for Propstack (the free tier caps monthly usage). Pro: 10,000 tool calls a month, for normal use — plan "monthly" ($9/month) or "yearly" ($90/year, 2 months free). Pro+: 100,000 tool calls a month, for automations and heavy use — plan "plus" ($39/month) or "plus_yearly" ($390/year). Without a plan it returns both Pro and Pro+, each with a payment link, for the user to choose; with a plan, one link. An existing Pro subscription changes to Pro+ in place: call without confirm first, as the reply states the exact charge for this account (the price difference for the rest of the period, or in a free Pro trial the full Pro+ price, as the trial ends); then call with confirm: true. Cancel any time: the plan then runs to the end of the paid period, so it also suits a one-time job. A link opens Stripe Checkout in the browser; after payment the account upgrades automatically. Does not count against the meter.
Cancel the Pro subscriptionpropstack_cancel_subscription
Cancel the caller's Propstack Pro subscription at the end of the paid period (no refund for the current period; Pro continues until then, then the free tier applies). Requires confirm: true. Run propstack_upgrade later to undo the cancel before the period ends. Does not count against the meter.

FAQ

What can I do with Propstack in Claude or ChatGPT?

List properties for sale or rent. See viewings and appointments in a time window. Review deals by pipeline stage. Look up, add or update a contact. Create or update a note, to-do or appointment. Create a deal or move it to another stage. See what you can do for the details.

Is this an official Propstack product?

No. usefulapi is an independent service. It is not affiliated with or endorsed by Propstack. The server calls the Propstack API with your own Propstack access, so it sees only the data that your account can see.

Can I connect Propstack to Claude or ChatGPT?

Yes. In Claude, add this server's URL as a custom connector. In ChatGPT, add it as a custom MCP server in Plugins. Then log in once. Cursor, VS Code, Claude Code and Codex work too. See the setup steps.

What do I need to connect?

The login page asks for your Propstack API key. See Before you connect for where to find it.

Do I put my Propstack key or an Authorization header in the client config?

No. 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: the login page asks for your Propstack API key. If the config has such a header, remove it: some clients then send that header instead of the login token, and every call fails with 401.

How do you keep my Propstack credentials?

The login stores them encrypted in the authorization grant of your connection. The server uses them to call the Propstack API for you and to derive a private account id for usage metering. usefulapi does not show them on any page or in any reply. To stop all access, remove the connector and change or delete these credentials in Propstack.

Can the AI change my Propstack data?

Yes, if you approve it. 6 of the 18 Propstack tools can create or change data. The other 12 are marked read-only. Most MCP clients ask you to approve a tool call before it runs.

What does it cost?

The Free plan gives 50 tool calls / month. Pro costs $9/mo or $90/yr, with 10,000 tool calls / month. Pro+ costs $39/mo or $390/yr, with 100,000 tool calls / month. Each subscription covers this Propstack server only. Cancel any time: your paid plan then runs to the end of the paid period. Run propstack_usage_status to see how many calls you used.

How do I subscribe or cancel?

Ask the AI to run propstack_upgrade and choose Pro or Pro+, billed monthly or yearly: it returns a Stripe Checkout link. If you already have Pro, ask to change it to Pro+. After you confirm, your existing subscription changes in place, keeps its billing interval and charges the price difference for the rest of the period immediately. To cancel, run propstack_cancel_subscription. Your paid plan continues to the end of the paid period.

What if a Propstack tool that I need is missing?

Tell the AI what you wanted to do. It can send the request with propstack_request_feature. We store the text with the server name, the type of AI client and the tool you tried, not with your account, and read every request when we plan new tools. You can send up to 5 requests per day.

Which AI clients can I use?

Any client that supports remote MCP servers (Streamable HTTP) with OAuth login: Claude (web and desktop), Claude Code, ChatGPT, Codex, Cursor, VS Code, Windsurf and others.

This is a Model Context Protocol endpoint — meant to be connected from an AI client, not opened in a browser. An invalid_token response at the URL is the auth gate working as designed; clients authenticate automatically.

Need a tool this server does not have, or a connection to another system? We build custom integrations and MCP servers.

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