Appraisal Host - Appraisal Management Software for AMCs and Lenders

Developer documentation

OpenAPI 3.1 spec

Guide

Appraisal Host APIAuthenticationSandboxOrder lifecycleWebhooksReference notesChangelogSupport

API reference

Every endpoint

Support

Who to write to

integrations@appraisalhost.com reaches our integrations team. Use it for anything about this API: sandbox access, a call that behaves differently from this documentation, a webhook that is not arriving, a question about a field, or a change you would like to see in a future version.

Write in English. We answer on United States business days.

For anything about a specific lender's account rather than the interface itself, the appraisal management company you are integrating for is the right first call: it issues and revokes credentials, decides which of its products a lender may order, sets the fees, and moves the orders.

QuestionAsk
Sandbox access, a test lender account, advancing a test orderOur integrations team
A response that does not match this documentationOur integrations team
A webhook that is not arriving, or a signature that will not verifyOur integrations team
Production credentials, or a credential rotationThe appraisal management company
Which products a lender may order, and what they costThe appraisal management company
The status of a specific live orderThe appraisal management company
A field or an event you need that does not exist yetOur integrations team

What to include

The more of this you send, the faster the answer:

  1. The environment: sandbox or production.
  2. Your client id. It starts with cli_ and is safe to send. Never send a client secret, a webhook secret or a bearer token. If a secret has been exposed, say so and we will treat it as urgent.
  3. The correlation_id from the response. Every error carries one, and it takes us straight to the request.
  4. The request: method, path, and the body with borrower details removed.
  5. The response: status code and body.
  6. The time, with its time zone, and how often it happens.
  7. What you expected, and which page of this documentation led you to expect it. If our documentation is wrong, that is a defect on our side and we want to know.

For a webhook problem, send the event id from X-AH-Event-Id, or the id from GET /events, plus what your endpoint returned. GET /events shows you our side of the story first: the attempt count, the last status we received from you, and when we will try again.

Requesting sandbox access

Sandbox access is provisioned on request. Send us:

  • Your company name and the product you are integrating.
  • A technical contact: name, email and time zone.
  • The HTTPS URL you want webhooks delivered to during the build, if you have one yet.
  • Which order types you need in the sandbox catalog: at least one product on the current report standard, at least one on the prior standard, and a product with an FHA certification requirement if you will place those orders.

We reply with a client id, a client secret and your sandbox order type codes. Full detail is on the Sandbox page.

Reporting something that looks like a security problem

Write to integrations@appraisalhost.com with "security" in the subject line and tell us what you saw. Do not include another party's data in the report, and do not test against production. We will confirm receipt, investigate, and tell you what we found.

Service status

Our integrations team notifies the technical contact on every active credential about planned maintenance, and about any incident that affects the API.

Once your integration is provisioned, put GET /ping in your own monitoring. It needs no credential, returns no account data, and answers 200 while the API is serving traffic:

curl -s https://api.appraisalhost.com/v1/ping
{ "status": "ok", "time": "2026-09-17T14:32:05Z" }

If calls are failing and GET /ping answers, the problem is most likely with your credential, your request or your network path rather than with the service. Send us the correlation_id and we will tell you which.

Changelog
Appraisal Host - Appraisal Management Software for AMCs and Lenders

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