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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 call Supplier API reference

What’s available today

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/supplier/v1/companies/{companyId}/speci-finder/results

Other API surfaces are in development and will appear here when they’re generally available.

Set expectations up-front

  • No webhooks or push events. Integrations are pull-based.
  • No pagination. Endpoints return full result sets with bounded cardinality (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

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

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.

Support