RentCast

Real-estate data via the RentCast API: rent estimates, property value estimates, market statistics, and active rental listings.

Tool ID

rentcast

Credential Required

Yes — type rentcast, one property:

Modes

The mode input selects which RentCast endpoint to call:

Input Properties

Not every mode uses every field. The tool picks out the relevant ones per mode.

For rent-estimate and value-estimate you must supply either address or both latitude and longitude.

Published Outputs

Downstream tasks can pull {{call.rent}} or parse {{call.response}} as JSON for details.

Example 1 — Rent estimate

{
  "tool": "rentcast",
  "credential": "my-rentcast",
  "properties": {
    "mode": "rent-estimate",
    "address": "1600 Amphitheatre Parkway, Mountain View, CA, 94043",
    "bedrooms": "3",
    "bathrooms": "2",
    "squareFootage": "1800"
  }
}

Typical summary:

RentCast rent estimate:
  estimate: $4,200/mo
  range:    $3,800 – $4,600/mo
  based on 15 comparable listings

Example 2 — Value estimate via lat/lon

{
  "tool": "rentcast",
  "credential": "my-rentcast",
  "properties": {
    "mode": "value-estimate",
    "latitude": "37.4220",
    "longitude": "-122.0841",
    "propertyType": "Single Family",
    "bedrooms": "3"
  }
}

Example 3 — Market snapshot

{
  "tool": "rentcast",
  "credential": "my-rentcast",
  "properties": {
    "mode": "market",
    "zipCode": "78244",
    "historyRange": "12"
  }
}

Typical summary:

RentCast market snapshot for 78244:
  Sale:   median $245,000, avg DoM 38
  Rental: median $1,750/mo, avg DoM 22

Example 4 — Rental listings in an area

{
  "tool": "rentcast",
  "credential": "my-rentcast",
  "properties": {
    "mode": "rental-listings",
    "zipCode": "78244",
    "bedrooms": "3",
    "limit": "10"
  }
}

Errors you'll see

• "RentCast apiKey missing from credential" — credential isn't set up or is missing the apiKey field
• "RentCast auth failed — check the apiKey in your credential (HTTP 401)" — key is wrong or revoked
• "RentCast rate limited or monthly quota exhausted (HTTP 429)" — you've hit the plan limit (50/month on free tier)
• "rent-estimate: need either 'address' OR both 'latitude' and 'longitude'" — input validation
• "market: 'zipCode' is required" — input validation

Rate limits and cost

• Free tier: 50 API calls/month, 20 requests/second burst.
• Paid tiers: start around $49/month for 1,000 calls.
• Each mode = 1 API call. So pulling a rent estimate + market snapshot = 2 calls.
• Log runs to track usage if you're on the free tier.

Chaining Patterns

• geocode → rentcast (rent-estimate) — user types an address, geocode it, fetch rent estimate for that lat/lon
• rentcast (rental-listings) → dataframe → email — weekly "what's available in my zip under $2000" report
• rentcast (market) → ai — "is now a good time to sell in zip X based on the market snapshot?"
• rentcast (value-estimate + rent-estimate) → condition → slack — monthly check on a rental property: alert if rent/price ratio drops

What this tool deliberately does NOT do

• Property records lookup (GET /v1/properties) — the RentCast "properties" endpoint returns county-record data (ownership, tax, sale history). Useful but a different modality; can be added as a 5th mode later.
• Sale listings (GET /v1/listings/sale) — parallel to rental-listings but for homes on the market. Same story — add later if needed.
• AVM comparable listings detail — rent-estimate and value-estimate responses include a comparables array; this tool returns a count in the summary and the full array in response, but doesn't format each comp. Use response + dataframe if you need them.

Publishes

The keys a later task may reference as {{taskName.key}}. Referencing anything not listed here resolves to nothing at run time.

• error
• listingCount
• medianRent
• medianSalePrice
• mode
• price
• priceRangeHigh
• priceRangeLow
• rent
• rentRangeHigh
• rentRangeLow
• response
• status
• summary

Input Properties

Every property this tool accepts, from its own tool.iml.