How AI is applied across API Evangelist and APIs.io. Read my AI disclosure →
API Evangelist API Evangelist
Discovery
Learnings
Guidance
Toolbox
Alignment
API Evangelist LLC
Discovery
Learnings
Guidance
Toolbox
Alignment
API Evangelist LLC

Need help?

Contact us
Landmark Information Group

Landmark Milestone Notification Service API

Callback registration API for valuation transaction milestone notifications on the Landmark Secure Panel Network (SPN). Consumers register, update and delete callback URLs that Landmark then calls as valuation milestones occur, making this Landmark's webhook subscription surface. Two paths, version 1.0.0, OpenAPI 3.0.1. Documented rate limit 250 requests per customer per minute.

Documentation Provider Profile APIs.io OpenAPI GitHub

Landmark Milestone Notification Service API is one of 7 APIs that Landmark Information Group publishes on the APIs.io network, described by a machine-readable OpenAPI specification.

Tagged areas include Webhook, Valuation, Milestones, and Lending. The published artifact set on APIs.io includes an OpenAPI specification, an API reference, API documentation, and authentication docs.

This API exposes 3 operations across 2 paths, and defines 25 schemas. It is described by OpenAPI 3.0.1, at version 1.0.0.

Requests are made against 2 base URLs: https://api.landmarkcloudservices.com/valuation-spn/milestones/callbacks, https://uat-api.landmarkcloudservices.com/valuation-spn/milestones/callbacks.

3 operations 2 paths 25 schemas 1 DELETE1 POST1 PUT

Metadata

The identity and technical contract details declared by the specification.

Specification
OpenAPI 3.0.1
API Version
1.0.0
Base URL
https://api.landmarkcloudservices.com/valuation-spn/milestones/callbacks
Authentication
HTTP Bearer
Contact
API Support
Resource Areas
1

Authentication & Security 1

Landmark Milestone Notification Service API declares 1 security scheme for authenticating requests. It accepts HTTP bearer tokens (JWT) (bearerAuth). By default, every request must be authenticated.

Paths & Operations 3

Across 2 paths, the API surfaces 3 operations — 1 DELETE, 1 POST, 1 PUT. Each is listed below with its method, path, parameters, and response codes.

milestones 3

Operations to manage callback configurations for transaction milestone notifications

POST
/callbacks
Register new milestone callback
spn-milestone-register-callback body → 201400401403404409413429
PUT
/callbacks/{callbackId}
Update milestone callback
spn-milestone-update-callback 1 param body → 204400401403404409413429
DELETE
/callbacks/{callbackId}
Delete milestone callback
spn-milestone-delete-callback 1 param → 204400401403404409413429

Schemas 25

The contract defines 25 schemas that model the data the API accepts and returns. The most detailed are lgsCallbackOAuth2 (7 properties), lgsValuationBookedNotification (5 properties), lgsCallbackClientIdSecret (4 properties), lgsDocumentAvailableNotification (4 properties). Each schema is shown below with its type and property counts.

RegisterMilestoneCallbackRequest
RegisterMilestoneCallbackResponse
object
1 property 1 required
MilestoneCallbackNotificationRequest
lgsUuid
string
lgsUrl
string
lgsCallbackBasic
object
Configure specific headers to be included within a callback request.
3 properties 2 required
lgsCallbackClientIdSecret
object
Configure client secret basic as the callback authentication mechanism. In the callback request, the clientid and clientsecret will be provided in the Authoriz…
4 properties 4 required
lgsCallbackOAuth2
object
Configure the OAuth2 client credentials flow using a shared secret as the callback authentication mechanism. In the callback request, a Bearer access token wil…
7 properties 5 required
lgsCallback
lgsErrorResponse
object
4 properties 3 required
lgsMilestone
object
3 properties 1 required
lgsTransactionRequestType
string
The type of transaction request.
lgsTransactionRequestMilestone
lgsValuationInstructedNotification
object
3 properties 2 required
changeReason
string
lgsInstructionPanelledNotification
object
4 properties 3 required
lgsValuationHeldNotification
object
3 properties 3 required
lgsContactTriedNotification
object
3 properties 3 required
lgsValuationCancelledNotification
object
3 properties 3 required
lgsValuationRejectedNotification
object
4 properties 4 required
lgsTime
string
example: 08:30:06Z; 08:30:06-08:00
lgsValuationBookedNotification
object
5 properties 3 required
lgsValuationCompleteNotification
object
2 properties 2 required
lgsDocumentAvailableNotification
object
4 properties 4 required
lgsTransactionRequestMilestoneSPN

Specification

The full machine-readable OpenAPI contract behind this narrative.

Source

landmark-information-milestone-notification-service-api-openapi.yml Raw ↑

Other APIs Landmark Information Group publishes across the network.

Landmark Order Experience API
AE Profile APIs.io
Landmark Conveyancing Experience API
AE Profile APIs.io
Landmark Intelliworks APIs
AE Profile APIs.io
Landmark Document Vault API
AE Profile APIs.io
Landmark Planning API (powered by Barbour ABI)
AE Profile APIs.io
Landmark Geodata Web Map Tile Service (WMTS)
AE Profile APIs.io
#Webhook#Valuation#Milestones#Lending
← Back to L APIs
API Details
ID
landmark-information:landmark-milestone-notification-service-api
Base URL
https://api.landmarkcloudservices.com/valuation-spn/milestones/callbacks
Docs
https://www.landmarkcloudservices.com/?api=milestone-service-api
Provider
Landmark Information Group
APIs.io →  GitHub →
Explore more
All APIs Providers APIs.io Network
Work with this as data

Every API here is available over the API and to AI agents over MCP. APIs is not yet its own endpoint on the v1 API. Reach this content through network search and the tag graph, or the MCP server below.

Installs https://mcp.apievangelist.com/mcp in Claude, Cursor, VS Code and the rest — one button, every client.

MCP tools for apis
4 tools reach this content
  • search_api_evangelistSearch every content type across the network at once.
  • find_relatedThe shared-tag relevance graph — what else covers this.
  • get_tagEverything one tag labels, across all content types.
  • guide_topicPRO — a curated bundle for a topic: area, guidance, rules, papers, stories, services.
All tools & prompts
Call it yourself
curl for this page
Search the network for this 
curl "https://api.apievangelist.com/v1/search?q=landmark-milestone-notification-service-api&limit=10"
Everything under a tag 
curl "https://api.apievangelist.com/v1/tags/landmark-milestone-notification-service-api"

Discovery needs no key. Full bodies and the synthesis endpoints are Pro.

Get an API key

Free tier, no email required. Sign in with whichever identity you already have.

GitHub Google LinkedIn

A second provider on the same verified email joins the account you already have. Your account

Where this information came from

This is an independent, third-party profile of Landmark Milestone Notification Service API, published by API Evangelist. We do not operate, host, resell, or support these APIs, and we are not affiliated with or endorsed by the company unless stated above. Everything here is built from publicly available information — the company's own site, developer portal, documentation, public repositories, and the specifications it publishes for public use. Nothing is obtained by breaching a system, defeating an access control, or using credentials.

The Kin Score and Agent Readiness rating are independently calculated assessments of a company's public API artifacts, scored against a published rubric. They are not certifications, endorsements, security assessments, or audits.

Corrections, re-scores, and removal are free — no partnership or purchase required, and you do not need to justify the request. A removed company is recorded as unrated, never scored zero for having asked. Acknowledgement within one business day; removal within two.

info@apievangelist.com · Read the full data-sourcing policy →
On a security or compliance team? Put security in the subject line and you will get a person, not a form — we will tell you exactly which public URLs this profile was built from.