Get your Flexmls saved searches through an API

What you can build on Flexmls

• Run a saved search

  Build this

  Opens one of your Saved Searches and reads the listings it returns, marking new listings, status changes and price changes since the date you give.

  Takes

  Saved search name, changed since (optional)

  Returns

  MLS number, address, status, list price, change type, change date

• Get reverse prospecting matches

  Build this

  Reads the Reverse Prospecting Matches page for one of your Active, Pending or Hold listings: the members whose contacts have saved searches that match it.

  Takes

  MLS number of your listing, prospecting period (optional)

  Returns

  Listing, member name, office, member contact information

• List a contact's subscriptions

  Build this

  Reads the Searches/Subscriptions tab of one contact in Contact Management: each subscription, its schedule and whether Preview Mode is on.

  Takes

  Contact name

  Returns

  Subscription name, saved search, schedule, Preview Mode, recipients, opt-in status

• Set up a subscription for a contact

  Build this

  Creates a subscription on one of your saved searches for a contact, with the schedule you choose and Preview Mode on, so you review listings before they go out.

  Takes

  Contact name, saved search name, schedule

  Returns

  Subscription name, contact, schedule, Preview Mode, opt-in status

Automate Flexmls with a workflow

A workflow runs your methods as one process, with nobody at the screen. A schedule or a call from your own system starts it, the steps run in order, and the result arrives in your inbox or in the systems you already use.

• Morning check of your saved searches

  Build this

  Starts

  Every weekday at 7:00

  Step 1

  For each saved search you name, run the saved search.

  Step 2

  Keep the listings that are new, or whose status or list price changed, since the last run.

  Step 3

  Email you the list, one section per saved search.

• Weekly reverse prospecting for your listings

  Build this

  Starts

  Every Monday at 8:00

  Step 1

  For each of your listings you name, get the reverse prospecting matches.

  Step 2

  Keep the members who were not matched on the last run.

  Step 3

  Email you the new matches, one section per listing, to follow up by hand.

• New listings from a saved search, posted to your CRM

  Build this

  Starts

  Every hour

  Step 1

  Run the saved search you name.

  Step 2

  Keep only listings that were not there on the last run, and stop when there are none.

  Step 3

  Post MLS number, address, status and list price to your CRM's webhook.

You can run a workflow by hand on every plan, Free included. Schedules and webhook triggers come with the paid plans, from $29 a month.

Once built, one call from your code

Once you have built a method, it is one POST to /v1/runs from your backend, or a tool an AI agent calls over MCP. This is what “Run a saved search” would look like.

curl https://api.fous.com/v1/runs \
  -H "Authorization: Bearer $FOUS_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "method": "flexmls.com/run_saved_search",
    "input": {
      "saved_search": "Northwind buyers, 3+ beds",
      "changed_since": "2026-11-11"
    }
  }'

{
  "status": "completed",
  "data": {
    "saved_search": "Northwind buyers, 3+ beds",
    "total_matches": 46,
    "changes": [
      {
        "mls_number": "6120458",
        "address": "1418 Acme Ridge Dr",
        "status": "Active",
        "list_price": 489000,
        "change_type": "New listing",
        "change_date": "2026-11-11"
      }
    ],
    "count": 1
  }
}

An example with invented data, not a ready-made endpoint. The method exists in your organization once you build it, and its name, inputs and fields follow your request.

Flexmls’s own options

FBS offers the Spark API, raw data feeds meant for web developers rather than for real estate agents themselves. Registering is free, but live data needs a data plan from your MLS in the Spark Datamart or your MLS's approval, and not every MLS offers plans. In Flexmls itself you can export search results to a .csv file.

Read on November 12, 2026: Spark API: set up access, Flexmls Help: export search results.

Signing in to Flexmls

You sign in at www.flexmls.com with your username and password, and the same login works in the Flexmls mobile apps. Members of MLSs that use FBS's Launch Dashboard get single sign-on with FBS as the identity provider. With Fous you sign in once through Flexmls's own sign-in with your own account: the login is sealed with AES-256, code and AI agents never see it, and an expired session is signed back in.

Worth knowing

Each MLS decides on API access

Spark API keys are ultimately up to each MLS, and not every MLS offers data plans in the Spark Datamart. A key for your own data comes with the Private role, whose data may never be shown publicly.

Saved searches track changes for you

By default a saved search counts new listings, status changes and price changes. Its summary shows new listings in the last 24 hours and new listings since a date, 30 days back by default.

Subscriptions need opt-in

A contact must confirm an opt-in email before receiving listing emails. Each subscription is limited to 200 recipients, and with Preview Mode on you review new listings before they go out.

Reverse prospecting has a window

Matches cover your Active, Pending and Hold listings, and only contacts with Enable Reverse Prospecting checked who clicked Flexmls emailed links in the chosen period. The other member's contact is not identified.

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