Developers
ListOnce is a neutral platform for listings: a member brokerage enters a listing once, the seller's visibility choice is recorded, and its deliveries record what each MLS, member brokerage, home search site and data feed in its market should get.
What you can build
- You are
- A member brokerage
- You can
- Enter and change listings from your own system, read them back with their history
- Scopes
listings:write listings:read
- You are
- A licensee
- You can
- Read the public feed in RESO fields
- Scopes
feed:read
- You are
- Either
- You can
- Hear about listing changes by signed webhook
- Scopes
webhooks:manage
Environments
- What
- Key
- Sandbox
ol_demo_7f3a9c2e5b1d4086- Live
- Issued to your organization by the operator
- What
- Access
- Sandbox
- Read only: feed:read
- Live
- The scopes on your key
- What
- Data
- Sandbox
- Sample listings; every name is invented
- Live
- Your listings, and the public feed
- What
- Limit
- Sandbox
- 600 requests a minute, shared
- Live
- 120 a minute per key unless agreed
- What
- Host
- Sandbox
- https://listonce.io
- Live
- https://listonce.io
One host serves both; the key decides what you see. Until a pilot starts, every listing on the platform is sample data.
First call
curl
curl "https://listonce.io/api/reso/Property?\$top=2" \ -H "Authorization: Bearer ol_demo_7f3a9c2e5b1d4086"
The machine readable description is /api/openapi.json (OpenAPI 3.1). Run calls in the browser on the Open API page.