IDX Broker MCP server

Read IDX Broker leads, agents, listings and MLS data; create and update leads and notes. Hosted by usefulapi: connect it to Claude, ChatGPT, Cursor or any MCP client.

Connect IDX Broker50 free tool calls a month

What can I ask?

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

Which new leads signed up in the last 24 hours?
Show me everything lead 4512 viewed and searched for.
Add a note to lead 4512: asked for a showing on Saturday.
List my featured listings with their prices.

What you can do with IDX Broker in Claude and ChatGPT

For real estate agents and brokers who manage website leads and listings in IDX Broker.

Find new leads and see what they viewed

The AI lists leads filtered by a time window on signup, edit, login or activity, and opens one lead with its last viewed listings and searches.

Review a lead's saved searches, properties and visits

The AI reads a lead's saved property searches, saved properties and website traffic history with date, page and referrer, so you see what the lead wants.

List your featured, sold or off-market listings

The AI lists the account's featured listings with address, price, status and agent, and its sold, pending, off-market and supplemental listings.

Check your MLS feeds and searchable data

The AI lists the approved MLSs, shows when a feed was last downloaded, and lists its search fields and its cities, counties or postal codes.

Add a lead or update an existing one

The AI creates a lead from an email and other fields, or changes fields of an existing lead such as name, phone or status.

Changes data

Add a note to a lead

The AI reads the existing notes on a lead and adds a new note, for example about a showing request. Notes are visible to the account's agents.

Changes data

How do I connect IDX Broker?

Before you connect

The login page asks for your IDX Broker access key.

Find it in IDX Broker under Home → Access Control (create a key if there is none). The key is 22 characters. Your account allows 300 (Lite) or 500 (Platinum) API accesses per key per hour, and every tool call uses at least one; a dedicated key keeps your other integrations from competing. Your key is used only to call the IDX Broker API on your behalf; it is never shown to anyone.

Claude claude.ai · Desktop

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

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 IDX Broker and this URL, choose OAuth as the authentication, confirm the warning and create it:
https://idx-broker.usefulapi.io/mcp
ChatGPT opens the login page: enter your IDX Broker access key.
In Plugins, install IDX Broker, 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 idx-broker https://idx-broker.usefulapi.io/mcp

Cursor

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

{
  "mcpServers": {
    "idx-broker": {
      "url": "https://idx-broker.usefulapi.io/mcp"
    }
  }
}

VS Code

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

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

Codex

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

codex mcp add idx-broker --url https://idx-broker.usefulapi.io/mcp

codex mcp login idx-broker

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://idx-broker.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 IDX Broker access 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 account	$9/mo · $90/yr	10,000 tool calls / month
Pro+per account	$39/mo · $390/yr	100,000 tool calls / month

Each paid plan covers this IDX Broker server only. Ask your AI to run idx_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 idx_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 idx_upgrade before then undoes the cancel. Or write to support@usefulapi.io.

Tools 31

Show all 31 tools (the AI picks them for you)

Read only · 24

Get account infoidx_get_account_info
The IDX Broker client account this access key belongs to: company and contact details and account settings (access keys and passwords are never returned). The reply also shows how many of the key's hourly API accesses are used.
Get account typeidx_get_account_type
The IDX Broker plan of the account (Lite or Platinum). It sets the hourly API limit: 300 accesses per key on Lite, 500 on Platinum.
List agentsidx_list_agents
Agents on a multi-user IDX Broker account (id, name, office, contact details, category, language, login dates). Filter by one field or by a time window.
List officesidx_list_offices
Offices on a multi-user IDX Broker account. Filter by one field or by a time window.
List leadsidx_list_leads
List the account's leads (website registrants) with contact details, status, agent owner, and last viewed listings and searches. A reply holds up to 500 leads; pass offset to page on and look for pagination information in the reply. Filter by a time window on signup, edit, login or activity date. Uses one of the key's hourly API accesses.
Get leadidx_get_lead
One lead by id with its details, last 5 viewed listings and searches, and the total number of listings viewed.
List lead notesidx_list_lead_notes
Notes on a lead, or one note when note_id is given.
List lead saved searchesidx_list_lead_searches
Saved property searches of a lead (or one search when search_id is given), with the results URL of each.
List lead saved propertiesidx_list_lead_saved_properties
Properties a lead saved (or one when property_id is given).
Get lead trafficidx_get_lead_traffic
Website traffic history of one lead: date, page, referrer and IP of each visit (at most 5,000 rows per request; use interval/offset/limit to narrow it).
List featured listingsidx_list_featured_listings
The account's featured (active) listings with address, price, status, photos and agent. Only the account's own listings are returned, never general MLS data.
List sold and pending listingsidx_list_sold_pending_listings
The account's sold and pending listings, that is those removed from the MLS feed.
List off-market listingsidx_list_off_market_listings
The account's off-market listings.
List supplemental listingsidx_list_supplemental_listings
The account's supplemental (non-MLS) listings with a basic set of fields.
List saved linksidx_list_saved_links
Saved links (pre-built property search pages) of the account with id, name and URL.
Count properties of a saved linkidx_get_saved_link_count
The total number of properties a saved link currently matches.
List widgetsidx_list_widgets
The JavaScript widgets on the account with id, name, URL and options.
Get widgetidx_get_widget
One JavaScript widget with its settings.
List system linksidx_list_system_links
The system pages of the account's site (search, featured, contact...) with name, id and URL, which can be linked to directly.
List approved MLSsidx_list_approved_mls
The MLSs approved for display on the account, with their IDX ids (such as a001) and names. Use the id in the other MLS tools.
Get MLS data ageidx_get_mls_age
When an MLS feed was last downloaded and processed and when its images were last gathered (UTC).
List MLS property typesidx_list_mls_property_types
Property types of an MLS with the IDX type id, the MLS name, the parent type and subtypes.
List MLS search fieldsidx_list_mls_search_fields
The fields of an MLS that can be searched under MLS rules: field name, display name and the property types they belong to.
List MLS cities, counties or postal codesidx_list_mls_locations
Cities, counties or postal codes present in an MLS's data, with ids and a count of occurrences. Filter fields: cities = cityID, cityName, stateAbrv, mlsPtID; counties = countyID, countyName, stateAbrv, mlsPtID; postalcodes = id, stateAbrv, mlsPtID.

Changes data · 3

Create leadidx_create_lead
WRITE: creates a new lead in the IDX Broker account (and may trigger the account's own lead notifications). Needs a correctly formatted email with a valid MX record; IDX rejects bad addresses with a server error. Extra fields go in `fields` by their IDX name, as seen on a lead returned by idx_get_lead. Returns the new lead id.
Add lead noteidx_add_lead_note
WRITE: adds a note to a lead (visible to the account's agents). Returns the new note id.
Update leadidx_update_lead
WRITE: changes fields of an existing lead; the given values replace the stored ones. Only pass what must change. Field names are the IDX lead field names as seen on a lead returned by idx_get_lead (for example firstName, lastName, email, phone, status).

Your usefulapi plan · 4

Usage status (free-tier meter)idx_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 featureidx_request_feature
Tell usefulapi that the user needs something the IDX Broker 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+idx_upgrade
Get a paid plan for IDX Broker (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 subscriptionidx_cancel_subscription
Cancel the caller's IDX Broker 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 idx_upgrade later to undo the cancel before the period ends. Does not count against the meter.

FAQ

What can I do with IDX Broker in Claude or ChatGPT?

Find new leads and see what they viewed. Review a lead's saved searches, properties and visits. List your featured, sold or off-market listings. Check your MLS feeds and searchable data. Add a lead or update an existing one. Add a note to a lead. See what you can do for the details.

Is this an official IDX Broker product?

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

Can I connect IDX Broker 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 IDX Broker access key. See Before you connect for where to find it.

Do I put my IDX Broker 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 IDX Broker access 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 IDX Broker credentials?

The login stores them encrypted in the authorization grant of your connection. The server uses them to call the IDX Broker 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 IDX Broker.

Can the AI change my IDX Broker data?

Yes, if you approve it. 3 of the 27 IDX Broker tools can create or change data. The other 24 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 IDX Broker server only. Cancel any time: your paid plan then runs to the end of the paid period. Run idx_usage_status to see how many calls you used.

How do I subscribe or cancel?

Ask the AI to run idx_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 idx_cancel_subscription. Your paid plan continues to the end of the paid period.

What if a IDX Broker tool that I need is missing?

Tell the AI what you wanted to do. It can send the request with idx_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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