API Developer Addendum

E1 (EstimateOne)
Last updated: April 2026

This API Developer Addendum (“Addendum”) forms part of the agreement between you (“Customer”, “you”) and EstimateOne Pty Ltd ACN 130 242 554 (“EstimateOne”, “E1”, “we”, “us”) governing your access to and use of the EstimateOne platform and related services (the “Platform”), as set out in the Terms of Use applicable to your jurisdiction (the “Terms of Use”).

This Addendum applies where EstimateOne makes available any application programming interfaces, integration tools or programmatic access mechanisms (each, an “API”).

By accessing or using any API, you agree to be bound by this Addendum, which is incorporated into and forms part of the Terms of Use.

The obligations set out in this Addendum are in addition to, and do not limit, the Customer’s obligations under the Terms of Use.

In the event of any inconsistency between this Addendum and the Terms of Use, this Addendum prevails to the extent of the inconsistency in relation to API access and use.

Capitalised terms used but not defined in this Addendum have the meanings given to them in the Terms of Use and the EstimateOne Privacy Policy.

About the plain-English summaries in this document

Under each numbered section below, you’ll find a short “In plain English” box that summarises the section. These summaries are provided to help you and our customer support team understand what each section is generally about. They are not a substitute for legal advice and they are not part of the agreement. The summaries simplify legal language, and in doing so some nuance and detail will inevitably be lost. The legally binding terms are the ones set out in the numbered clauses themselves. If you have any concerns or questions about how these terms apply to you, please seek independent legal advice.

1. Purpose and context

In plain English

What the API is for.
It lets you plug Platform data into your own internal tools — CRM, ERP, workflow systems — to support the way you already use the Platform.
What it’s not for.
It isn’t a bulk-export channel, and it isn’t there to help anyone replicate the Platform, build a competing product, or extract our datasets.

1.1 The Platform is designed to facilitate construction procurement, tendering and related workflows. EstimateOne makes APIs available to enable Customers to integrate Platform data into their internal systems and support operational workflows connected to their use of the Platform.

1.2 The API is not intended to:

provide bulk data access outside the Platform experience;
enable extraction or replication of Platform datasets; or
support the development of products or services that compete with the Platform or any part of EstimateOne’s Services.

2. Licence and permitted use

In plain English

A limited, revocable licence.
You get a non-exclusive, non-transferable right to use the API for your own internal business and to feed Platform data into your own tools, tied to your Platform subscription.
Follow the docs.
That includes our published API documentation, technical requirements, rate limits, and any implementation guidelines we publish or notify.
Same data, different pipe.
API access doesn’t widen your rights. You can only reach data you were already entitled to see in the Platform under your subscription.

2.1 Subject to compliance with the Terms of Use and this Addendum, EstimateOne grants you a limited, revocable, non-exclusive, non-transferable, non-sublicensable right to access and use the API solely:

for your own internal business purposes; and
to integrate data available to you within the Platform into your internal systems (including CRM, ERP or workflow tools), subject to the confidentiality obligations in the Terms of Use;

in each case strictly in connection with your permitted use of the Platform under the Terms of Use.

2.2 You must comply with:

all API documentation and technical requirements published by EstimateOne from time to time; and
any usage limits, access controls or implementation guidelines notified by EstimateOne (including via the Platform or developer documentation).

2.3 API access does not expand your rights to access, extract, use or exploit data beyond what is available to you within the Platform under your existing subscription, permissions and permitted use.

3. Data use restrictions

In plain English

Data stays inside your business.
You can’t resell, redistribute, or share API data with third parties, and you can’t roll it into a dataset, index, or feed for a commercial product — internal or external.
No AI or ML training without our written OK.
This covers training, fine-tuning, evaluating, or benchmarking models on API data, and also covers agentic tools or AI assistants that call the API on your behalf. If you have a use case in mind, talk to us first.
No substituting for or competing with the Platform.
Don’t use API data to build something that replicates project discovery, tender matching, qualification, or supplier identification, or that materially overlaps with them.
No scraping, no bypassing controls.
Rate limits, access controls, and monitoring exist for a reason. Don’t work around them, don’t bulk-extract, and don’t reverse engineer or benchmark the API.
Cache only what you need.
Some caching is fine where it’s strictly necessary for your permitted internal use, but you can’t use caching to build a shadow copy of the data or to reduce your reliance on live Platform access.
The API is the only automated way in.
Scraping, crawling, or bulk-extracting Platform data outside the API is still prohibited under the Terms of Use.

3.1 You must not, and must ensure that your users and Authorised Service Providers (as defined in clause 5) do not:

resell, sublicense, distribute or otherwise make available any data obtained via the API to any third party;
aggregate, extract or process data obtained via the API to build any dataset, database, index or data feed made available to third parties or used internally to support a commercial product or service;
use data obtained via the API to develop, operate or support any product or service that competes with the Platform or any part of the Services;
use data obtained via the API to replicate, substitute for, materially overlap with, or reduce reliance on any functionality of the Platform, including project discovery, tender matching, qualification or supplier identification;
use the API or any data obtained via it to train, fine-tune, validate or develop any artificial intelligence or machine learning model, or to create datasets for such purposes, without EstimateOne’s prior written consent;
use the API or data obtained via it in connection with any agentic system or AI tool that accesses or interacts with the Platform, or to develop, train or improve any model, dataset or system (including any AI or machine learning model), without EstimateOne’s prior written consent;
use the API in a manner that enables systematic or bulk extraction of data inconsistent with your permitted use under clause 2;
attempt to circumvent, bypass or exceed any usage limits, access controls or restrictions applied by EstimateOne;
reverse engineer, decompile, decode or otherwise attempt to derive the structure, source code or operation of the API or any part of the Platform;
use the API for benchmarking, monitoring or competitive analysis of the Platform or EstimateOne’s Services;
use the API to scrape, crawl, harvest or conduct bulk extraction of data by any means other than through the API as expressly permitted;
use the API or data obtained via it in any manner that exceeds your permitted use of the Platform under the Terms of Use;
use the API or any data obtained via it in a manner that is inconsistent with the purpose and intent of this Addendum or that would reasonably be expected to undermine the commercial value of the Platform or Services;
cache, store, retain or otherwise persist any data obtained via the API, except to the limited extent strictly necessary to enable your permitted internal business use under clause 2, and in any event not in a manner that:
1. reduces or substitutes for live access to the Platform via the API;
2. enables the creation of any dataset, database or data store derived from the API; or
3. circumvents any usage limits, access controls or technical restrictions implemented by EstimateOne; or
combine or integrate the API with any software, tool or service in a manner that disables, overrides or interferes with any EstimateOne-implemented access controls, monitoring systems, user communications, consent mechanisms or security features.

3.2 For the avoidance of doubt, the API is the only permitted method of automated or programmatic access to Platform data. Any scraping, crawling, harvesting or bulk extraction of data outside the API remains strictly prohibited under the Terms of Use.

4. Privacy and data protection

In plain English

Once data leaves the Platform, it’s on you.
You’re responsible for how anything pulled via the API is stored, processed, and used after that, and you carry the risk of any onward use.
Privacy law still applies.
Comply with the data protection and privacy laws that apply to you, especially where personal data is involved. Our Privacy Policy at estimateone.com/privacy covers how we handle personal data at our end.
Don’t use API data for direct marketing or re-identification.
No repurposing API-sourced personal data for direct marketing (unless the law expressly allows it), and no attempts to re-identify anonymised or aggregated data.

4.1 Where you access or export data via the API, you are solely responsible for how that data is used, stored and processed following export. Without limiting the foregoing, you assume all risk associated with any onward use, disclosure or processing of data obtained via the API.

4.2 You must comply with all applicable data protection and privacy laws in connection with your use of the API and any data obtained via it, including in relation to any personal data or personal information.

4.3 The Customer remains fully liable for how data is used once it has been exported from the Platform via the API.

4.4 The EstimateOne Privacy Policy (available at https://estimateone.com/privacy/) applies to all personal data processed in connection with use of the API.

4.5 You must not:

use personal data obtained via the API for Direct Marketing Purposes (including as restricted under the Terms of Use), unless expressly permitted by applicable law;
combine data obtained via the API with other datasets in a manner that creates additional privacy or compliance risks; or
attempt to re-identify any anonymised or aggregated data obtained via the API.

5. Third-party access and responsibility

In plain English

Contractors and service providers can help.
Your employees, contractors, and authorised service providers can use the API on your behalf where strictly necessary for your permitted use.
They must be bound by equivalent obligations,
and use the API only for your permitted purposes. You’re responsible for what they do under your credentials.
Not our competitors.
You can’t appoint a competitor of EstimateOne, or anyone we reasonably consider to be building a competing product, as an authorised service provider.
If a service provider serves multiple customers,
they have to keep each customer’s data, credentials, and API usage strictly separated — no cross-pollination between accounts.

5.1 You may permit your employees, contractors and authorised service providers (“Authorised Service Providers”) to access and use the API on your behalf only where strictly necessary for your permitted use under clause 2.

5.2 You must ensure that any Authorised Service Provider:

is bound by obligations no less restrictive than those set out in this Addendum; and
uses the API solely for your permitted purposes.

5.3 You remain fully responsible for all acts and omissions of your Authorised Service Providers in connection with the API, and for all use of the API conducted via your credentials.

5.4 Authorised Service Providers must not include any direct competitor of EstimateOne or any entity reasonably considered by EstimateOne to be developing or operating a competing product or service.

5.5 Where an Authorised Service Provider accesses or uses the API on behalf of more than one Customer, the Customer must ensure that:

the Authorised Service Provider maintains strict separation between each Customer’s data, credentials and API usage; and
no data obtained via the API is shared, disclosed, transferred or otherwise made available between Customer accounts.

Each Customer remains independently responsible for all acts and omissions of its Authorised Service Providers in connection with its account and use of the API.

6. Security and API credentials

In plain English

Look after your keys.
Keep API keys, tokens, and other credentials confidential. Only share them with authorised service providers as covered in section 5.
Tell us if something looks off.
If you suspect your credentials have been compromised or the API is being misused under your account, let us know straight away.
No impersonation.
Don’t misrepresent who you are, or your affiliation, to get API access.
You’re accountable for what happens under your credentials,
whether or not you authorised it — which is why keeping them safe matters.

6.1 You must:

keep all API keys, tokens, access names and other credentials (“API Credentials”) secure and confidential;
not share API Credentials with any person other than as permitted under clause 5;
notify EstimateOne immediately upon becoming aware of any actual or suspected unauthorised access to or use of your API Credentials or the API; and
not impersonate any other person or entity, or misrepresent its identity or affiliation in order to obtain access to or use the API.

6.2 You are solely responsible for all activity conducted using your API Credentials, whether or not authorised by you.

7. Technical controls and enforcement

In plain English

We monitor and enforce.
We can monitor API usage, adjust rate limits, throttle, or suspend access at our discretion. Where we reasonably suspect misuse, unusual usage, or a risk to the Platform, we can act immediately and without notice.
False positives can happen.
We try to keep them to a minimum, but a good-faith suspension isn’t something we’re liable for. If you think you’ve been suspended in error, get in touch and we’ll take a look.
We may ask you to demonstrate compliance,
and if we do, you need to provide the information we reasonably need.

7.1 EstimateOne may, at its discretion:

monitor API usage;
apply or adjust rate limits and technical access controls;
restrict or throttle access; and
suspend or terminate API access.

7.2 EstimateOne may take any action under clause 7.1 immediately and without prior notice where it reasonably suspects:

misuse of the API or breach of this Addendum or the Terms of Use;
abnormal, excessive or unauthorised usage; or
a risk to Platform integrity, security or EstimateOne’s legitimate commercial, operational or security interests.

7.3 While EstimateOne uses reasonable efforts to minimise false positives, the Customer acknowledges that suspensions may occur even where a breach has not in fact taken place. Except as required by applicable law, EstimateOne will not be responsible for loss arising from a suspension made in good faith.

7.4 EstimateOne may request reasonable information from the Customer to verify compliance with this Addendum, including information relating to the Customer’s use of the API. The Customer must promptly provide such information to the extent reasonably necessary to demonstrate compliance.

8. Changes to the API

In plain English

APIs evolve.
We can modify, update, or discontinue any API. We’ll make reasonable efforts to give notice of material changes, but we can’t promise backwards compatibility.
Migrate promptly when we release a new version.
We may retire prior versions after reasonable notice, so plan your upgrade window when we announce a change.

8.1 EstimateOne may modify, update or discontinue any API at any time.

8.2 EstimateOne will use reasonable efforts to provide notice of material changes to the API, but does not guarantee backward compatibility and is not liable for any loss or disruption resulting from API changes.

8.3 The Customer agrees to promptly transition to any updated version of the API within the timeframe specified by EstimateOne, and acknowledges that EstimateOne may suspend or discontinue access to prior API versions upon reasonable notice.

9. Intellectual property

In plain English

The API and Platform stay ours.
Nothing in this Addendum transfers ownership of the API, Platform, systems, data structures, or documentation to you.
Platform data you touch via the API is licensed, not sold.
You get the limited right to use it under section 2 — no other rights, title, or interest.
Your Customer Data stays yours,
subject to the licences you grant under the Terms of Use.

9.1 All rights in and to the API, the Platform, related systems, data structures and documentation remain exclusively with EstimateOne or its licensors. Nothing in this Addendum transfers any ownership rights to the Customer.

9.2 The Customer acquires no rights, title or interest in any Platform data accessed via the API, other than the limited right to access and use such data in accordance with clause 2.

9.3 The Customer retains ownership of its own Customer Data uploaded to the Platform, subject to the licences granted under the Terms of Use.

10. Warranties and disclaimers

In plain English

“As is” and “as available”.
We’ll make commercially reasonable efforts to keep the API free from material defects, but we can’t guarantee availability, uptime, or fitness for any specific purpose.
Non-excludable consumer rights still apply.
Where the law gives you a guarantee we can’t exclude — such as under the Australian Consumer Law — nothing here takes it away.

10.1 EstimateOne will use commercially reasonable efforts to ensure the API is free from material defects.

10.2 To the maximum extent permitted by applicable law, the API is provided on an “as is” and “as available” basis. EstimateOne does not guarantee availability, performance, continuity or fitness for any particular purpose in connection with the API, and is not liable for loss arising from API use, interruption, modification or discontinuation.

10.3 Nothing in this clause limits any non-excludable guarantee or statutory right the Customer may have under applicable law.

11. Limitation of liability

In plain English

Same caps as the Terms of Use.
The disclaimers and liability limits in your main Terms of Use apply to your use of the API too.
No indirect or consequential loss.
To the maximum extent the law allows, we’re not liable for indirect, incidental, special, punitive, or consequential loss arising from your use of the API.

11.1 EstimateOne’s liability in connection with the Customer’s use of the API is subject to the disclaimers and limitations of liability set out in the Terms of Use, which apply to this Addendum.

11.2 Without limiting clause 11.1, EstimateOne will not be liable for any indirect, incidental, special, punitive or consequential loss or damages arising out of or in connection with the Customer’s use of the API, except to the extent that such liability cannot be excluded or limited under applicable law.

12. Suspension and termination

In plain English

We can suspend immediately
in the misuse and abuse scenarios covered in section 7.
Either side can terminate for material breach,
with a 30-day chance to remedy the breach if it’s something that can be fixed.
We can also terminate on 30 days’ notice
for any reason or no reason, and this Addendum ends automatically if your Platform account or Terms of Use end.
After termination:
stop using the API, destroy your API credentials, and treat all rights granted here as ended. Anything either side had already earned or owed still stands.

12.1 EstimateOne may suspend API access immediately in the circumstances set out in clause 7.2.

12.2 Either party may terminate this Addendum on written notice if the other party commits a material breach that, where capable of remedy, is not remedied within 30 days of written notice.

12.3 EstimateOne may terminate this Addendum for any reason or no reason by giving the Customer 30 days’ prior written notice.

12.4 This Addendum terminates automatically upon termination of the Customer’s account or applicable Terms of Use.

12.5 Upon termination for any reason:

the Customer must immediately cease all access to and use of the API;
the Customer must delete or destroy all API Credentials; and
all licences and rights granted under this Addendum terminate immediately.

12.6 Termination does not affect any accrued rights or obligations of the parties existing prior to the date of termination.

13. General

In plain English

This Addendum sits on top of the Terms of Use.
It adds obligations for API use — it doesn’t replace or reduce what’s already there.
We can update this Addendum,
with material changes getting reasonable notice under the Terms of Use. Continued API use after publication means you accept the update.
Governing law follows the Terms of Use
applicable to you. If a provision is unenforceable, it’s severed to the minimum extent needed; the rest still applies.
Queries about this Addendum
go to legal@estimateone.com.

13.1 Relationship to Terms of Use. This Addendum supplements and forms part of the Terms of Use. The rights and obligations set out in this Addendum are in addition to, and do not limit, those set out in the Terms of Use.

13.2 Amendments. EstimateOne may update this Addendum from time to time. Updated versions will be published on the EstimateOne website and Platform. Continued use of the API following publication constitutes acceptance. Where an update constitutes a material change, EstimateOne will provide reasonable notice in accordance with the Terms of Use.

13.3 Governing law. This Addendum is governed by the same law as the Terms of Use to which the Customer is subjected.

13.4 Severability. If any provision is void or unenforceable, it is severed to the minimum extent necessary without affecting the remaining provisions.

13.5 No waiver. Failure to enforce any right under this Addendum does not constitute a waiver of that right.

13.6 Contact. For queries about this Addendum, please contact EstimateOne at legal@estimateone.com.

This Addendum was last updated in April 2026.