# Verify API

**Canonical:** https://apis.io/apis/terminus/verify-api/  
**Provider:** Terminus — https://apis.io/providers/terminus/  
**Base URL:** https://api.lastbounce.com/  
**Documentation:** https://support.demandscience.com/hc/en-us/sections/38485678357267-API-Documentation

Verify API is one of 3 APIs that [Terminus](https://apis.io/providers/terminus/) publishes on the [APIs.io](https://apis.io/) network. Tagged areas include Email Verification, Data Quality, and Email. The published artifact set on APIs.io includes an API reference, authentication docs, and rate-limit docs.

Email verification API — single-address real-time validation and asynchronous CSV batch verification, sold as Intelligent Verification. OWNERSHIP: this API is served from api.lastbounce.com rather than a terminus.com or demandscience.com host because Verify is the renamed Lastbounce product; the provider's own reference states the environment URL format is https://<environment>.lastbounce.com/, and the article is published in the DemandScience Help Center whose product-rename set (Lastbounce → Verify, Klarity → Audience Builder, Email Experiences → Signature Ads) is documented in lifecycle/terminus-lifecycle.yml. It is a sibling product to the Terminus ABM Platform under the merged DemandScience entity this repo profiles, NOT a Terminus-branded API — recorded as its own entry so it is never conflated with the ABM Platform API. It is the only API of this provider with a public reference: endpoints, the x-api-key header, the error envelope and the full result-code vocabulary are all published, though no OpenAPI is served (the article offers "a copy of the full API documentation" on request). Operations: POST /api/singleEmail/validate, POST /api/batch/validation, POST /api/batch/{jobId}/status, GET /api/file/download/{jobId}. Metered in prepaid credits, one per verification.

## Machine-readable artifacts (7)

- **APIReference** — https://support.demandscience.com/hc/en-us/sections/38485678357267-API-Documentation
- **Authentication** — https://raw.githubusercontent.com/api-evangelist/terminus/refs/heads/main/authentication/terminus-authentication.yml
- **ErrorCatalog** — https://raw.githubusercontent.com/api-evangelist/terminus/refs/heads/main/errors/terminus-problem-types.yml
- **Conventions** — https://raw.githubusercontent.com/api-evangelist/terminus/refs/heads/main/conventions/terminus-conventions.yml
- **DataModel** — https://raw.githubusercontent.com/api-evangelist/terminus/refs/heads/main/data-model/terminus-data-model.yml
- **RateLimits** — https://raw.githubusercontent.com/api-evangelist/terminus/refs/heads/main/rate-limits/terminus-rate-limits.yml
- **Sandbox** — https://raw.githubusercontent.com/api-evangelist/terminus/refs/heads/main/sandbox/terminus-sandbox.yml

## Other Terminus APIs (2)

- [Terminus ABM Platform API](https://apis.io/apis/terminus/terminus-abm-platform-api/)
- [Employee Automation API](https://apis.io/apis/terminus/employee-automation-api/)

## Tags

Email Verification, Data Quality, Email

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/apis/terminus/verify-api/). The API's provider profile, Kin Score and agent-readiness rating are at https://apis.io/providers/terminus/.