/ Developer API

The cost engine,
as an API.

Lender? AMC? PropTech? Workflow vendor? Hit the Replicost API and get a defensible RCN, depreciation, or RCV back as JSON. Live data. Reproducible historical snapshots. SLA-backed.

✓ REST & JSON✓ Webhooks for batch jobs✓ Sandbox + production
Start free trial → Book a demo
/ / Endpoints

What you can call.

/ 01
POST /v1/rcn

Given a property (address, APN, or characteristics), return a defensible RCN with breakdown to the segregated component level.

/ 02
POST /v1/rcv

Insurance RCV for a property. Includes depreciation schedule and code-upgrade allowance.

/ 03
POST /v1/cost-approach

Full cost approach: RCN + depreciation + land + reconciliation. Returns PDF, DOCX, JSON, or all three.

/ 04
GET /v1/index

Live RPLX-2026 index values. Filter by class, region, and date.

/ 05
GET /v1/multipliers/:zip

Regional cost multipliers for any ZIP. Returns the current value plus historical series.

/ 06
POST /v1/batch

Bulk processing — submit 50K parcels and get notified by webhook when the run is done.

/ / Sample

Looks like this.

curl -X POST https://api.replicost.com/v1/rcn \
  -H "Authorization: Bearer $REPLICOST_API_KEY" \
  -d '{"address": "421 N State St, Chicago, IL 60654", "class": "office_b", "gla": 18400, "stories": 6, "year_built": 1998}'

→ {
  "rcn":            8204500,
  "rcn_per_sf":     445.92,
  "depreciation":   { "physical": 1632000, "functional": 0, "external": 0 },
  "methodology":    "RPLX-2026",
  "as_of":          "2026-05-28",
  "citations_url":  "https://replicost.com/api/citations/r_8b2..."
}
/ Ready when you are

Get an API key.

Sandbox keys are free. Production access is metered & SLA-backed. Talk to us about your use case.

Start free trial → Book a 15-min demo
EST. 2014 · LITIGATION PROVEN · USPAP-COMPLIANT