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E1 Developer

E1 Developer

The machine-to-machine API partners use to access E1 data on behalf of mutual customers.
Make your first callBrowse the API reference

What’s available today

Section titled “What’s available today”

The Builder API covers the work a builder puts to market: their tender and procurement projects, the packages those break into, and the drawings and specifications issued against them.

GET /api/tender/builder/v1/companies/{companyId}/tender-projects

See the Builder API overview for the full surface.

The Supplier API exposes Speci-finder matched project results for a supplier user, so partner systems can surface those matches inside their own applications.

GET /api/tender/supplier/v1/companies/{companyId}/speci-finder/results

Set expectations up-front

Section titled “Set expectations up-front”
  • No webhooks or push events. Integrations are pull-based.
  • Cursor-paged lists. List endpoints return a page plus a _metadata.nextCursor; follow the cursor to walk the full set (see Conventions).
  • No published SDK. Partners consume raw HTTP, or generate a client from the OpenAPI spec on the Supplier API reference.

Where to next

Section titled “Where to next”

Builder API

Projects, packages, documents and uploads for the builder side. Builder API →

Read the overview

Plain-language summary of what the API enables and who it’s for. Overview →

Make your first call

A single end-to-end walkthrough: token, headers, response. Guide →

Authenticate

OAuth2 client credentials, the x-e1-client-id header, and token lifecycle. Authentication →

Use it from Zapier

Hook the API into a Zap with Webhooks-by-Zapier and Storage. Zapier guide →

Getting access

Section titled “Getting access”

New partners are onboarded by E1. The onboarding team will create an application for your integration, register your customer’s company, and issue you a client_id and client_secret.

To start the conversation, contact support@estimateone.com.

Use of the API is governed by the API Developer Addendum.

Support

Section titled “Support”