Terminus

Terminus is an account-based marketing (ABM) platform covering account-based advertising, web personalization, email-signature marketing (Sigstr), conversational chat (Ramble) and revenue measurement (BrightFunnel). Terminus merged into DemandScience on 2024-11-12; terminus.com now 301-redirects to demandscience.com and the product runs as the DemandScience ABM Platform at app.demandscienceplatform.com. Terminus-branded infrastructure is still in production — api.terminusplatform.com, email.terminusplatform.com (Email Experiences / Signature Ads), terminus.bound360.com (Web Experiences) and *.terminus.services — and the API reference is published on a Redocly developer portal at developer.terminus.com. Platform API access is issued through a support ticket, and every path on the developer portal and the API host requires credentials. A third API is publicly documented: the Verify API (formerly Lastbounce, sold as Intelligent Verification) at api.lastbounce.com, whose endpoints, x-api-key header, error envelope and result-code vocabulary are all published in the DemandScience Help Center — as prose and cURL, with no OpenAPI served anywhere. No plans or price points are published, no rate limits are documented, and there is no first-party SDK in any registry for any of the three APIs.

Terminus publishes 3 APIs on the APIs.io network. Tagged areas include Company, Account Based Marketing, Marketing, Advertising, and Sales.

Terminus’ developer surface includes documentation, support, engineering blog, authentication, API reference, getting-started guide, pricing, and 20 more developer resources.

34.7/100 thin ▬ flat Agent 16/100 agent aware Full breakdown ↓
scored 2026-08-17 · rubric v0.11.0
3 APIs
CompanyAccount Based MarketingMarketingAdvertisingSalesB2BAnalyticsEmailEmail VerificationData Quality

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-08-17 · rubric v0.11.0
Composite quality — 34.7/100 · thin
Contract Quality 0.0 / 25
Developer Ergonomics 11.7 / 20
Commercial Clarity 10.5 / 20
Operational Transparency 1.7 / 13
Governance 1.5 / 12
Discoverability 9.3 / 10
Agent readiness — 16/100 · agent aware
Machine-Readable Contract 0 / 18
Agentic Access Contract 0 / 10
MCP Server 0 / 12
Machine-Readable Auth 10 / 10
Idempotency 0 / 9
Stable Error Semantics 8 / 8
Request/Response Examples 0 / 7
Rate-Limit Signaling 7 / 7
Typed Event Surface 0 / 6
Agent Skills 0 / 5
Well-Known Catalog 0 / 4
Consent & Bot Identity 0 / 3
A2A Agent Card 0 / 8
Dry-Run / Simulate Mode 0 / 4
Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. This rating is computed from github.com/api-evangelist/terminus: open an issue to ask a question, or submit a pull request to add artifacts. Want it done for you? Prioritized profiling — $2,500 →

APIs 3

Individual APIs this provider publishes, each with its own machine-readable definition.

Terminus ABM Platform API

The account-based marketing platform API behind Terminus (now the DemandScience ABM Platform). The API host api.terminusplatform.com is live and answers every anonymous request ...

Employee Automation API

A dedicated service that streamlines management of users and employee signature data inside an Email Experiences (Signature Ads, formerly Sigstr) account. Employee data delivere...

Verify API

Email verification API — single-address real-time validation and asynchronous CSV batch verification, sold as Intelligent Verification. OWNERSHIP: this API is served from api.la...

Pricing Plans 1

Published pricing tiers and plan structures.

Rate Limits 1

Documented rate limits and quota policies.

Terminus Rate Limits

0 limits

RATE LIMITS

Security Posture 3

Authentication, domain security, vulnerability disclosure, and trust-center signals.

Terminus Authentication

apiKey · 3 schemes

SECURITY

Terminus Domain Security

TLSv1.3 · DMARC

SECURITY

Terminus Trust Center

trust center published

SECURITY

Resources

Get Started 4

Portal, sign-up, and the first successful call

Documentation 2

Reference material describing how the API behaves

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

Design & Contract 5

Pagination, idempotency, versioning, errors, and events

Build 3

SDKs, sample code, and the tooling you integrate with

Access & Security 3

Authentication, authorization, and security posture

Operate 3

Status, limits, changes, and where to get help

Commercial 4

Pricing, plans, and the legal terms of use

Company 2

The organization behind the API

Source (apis.yml)

apis.yml Raw ↑
aid: terminus
name: Terminus
description: 'Terminus is an account-based marketing (ABM) platform covering account-based advertising, web personalization,
  email-signature marketing (Sigstr), conversational chat (Ramble) and revenue measurement (BrightFunnel). Terminus merged
  into DemandScience on 2024-11-12; terminus.com now 301-redirects to demandscience.com and the product runs as the DemandScience
  ABM Platform at app.demandscienceplatform.com. Terminus-branded infrastructure is still in production — api.terminusplatform.com,
  email.terminusplatform.com (Email Experiences / Signature Ads), terminus.bound360.com (Web Experiences) and *.terminus.services
  — and the API reference is published on a Redocly developer portal at developer.terminus.com. Platform API access is issued
  through a support ticket, and every path on the developer portal and the API host requires credentials. A third API is publicly
  documented: the Verify API (formerly Lastbounce, sold as Intelligent Verification) at api.lastbounce.com, whose endpoints,
  x-api-key header, error envelope and result-code vocabulary are all published in the DemandScience Help Center — as prose
  and cURL, with no OpenAPI served anywhere. No plans or price points are published, no rate limits are documented, and there
  is no first-party SDK in any registry for any of the three APIs.'
url: https://raw.githubusercontent.com/api-evangelist/terminus/refs/heads/main/apis.yml
x-type: company
x-source: harvest:secondary-market
x-source-url: https://forgeglobal.com/terminus_stock/
x-tier: stub
x-tier-reason: harvest
specificationVersion: '0.20'
image: https://demandscience.com/wp-content/uploads/2023/05/cropped-favicon-192x192.png
created: '2026-08-05'
modified: '2026-08-12'
tags:
- Company
- Account Based Marketing
- Marketing
- Advertising
- Sales
- B2B
- Analytics
- Email
- Email Verification
- Data Quality
apis:
- name: Terminus ABM Platform API
  description: The account-based marketing platform API behind Terminus (now the DemandScience ABM Platform). The API host
    api.terminusplatform.com is live and answers every anonymous request with HTTP 401 "Authentication Invalid"; the reference
    is published on a Redocly developer portal at developer.terminus.com where every path 302-redirects to /redocly-login.
    Platform API access is requested through a support ticket.
  humanURL: https://developer.terminus.com/
  baseURL: https://api.terminusplatform.com/
  tags:
  - Account Based Marketing
  - Marketing
  properties:
  - type: DeveloperPortal
    url: https://developer.terminus.com/
  - type: Authentication
    url: authentication/terminus-authentication.yml
- name: Employee Automation API
  description: A dedicated service that streamlines management of users and employee signature data inside an Email Experiences
    (Signature Ads, formerly Sigstr) account. Employee data delivered to the API endpoint creates, updates and removes employees
    in real time; v4 (July 2022) stops Employee Group changes from overwriting admin selections made in the UI. Access is
    granted by submitting a support ticket, and no public reference or specification is published.
  humanURL: https://support.demandscience.com/hc/en-us/articles/360051822454-Employee-Automation-API-for-Email-Experiences
  baseURL: https://email.terminusplatform.com/
  tags:
  - Email
  - Marketing
- name: Verify API
  description: '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.'
  humanURL: https://support.demandscience.com/hc/en-us/sections/38485678357267-API-Documentation
  baseURL: https://api.lastbounce.com/
  tags:
  - Email Verification
  - Data Quality
  - Email
  properties:
  - type: APIReference
    url: https://support.demandscience.com/hc/en-us/sections/38485678357267-API-Documentation
  - type: Authentication
    url: authentication/terminus-authentication.yml
  - type: ErrorCatalog
    url: errors/terminus-problem-types.yml
  - type: Conventions
    url: conventions/terminus-conventions.yml
  - type: DataModel
    url: data-model/terminus-data-model.yml
  - type: RateLimits
    url: rate-limits/terminus-rate-limits.yml
  - type: Sandbox
    url: sandbox/terminus-sandbox.yml
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: Website
  url: https://demandscience.com/
- type: DeveloperPortal
  url: https://developer.terminus.com/
- type: Documentation
  url: https://support.demandscience.com/hc/en-us
- type: Support
  url: https://support.demandscience.com/hc/en-us
- type: Login
  url: https://app.demandscienceplatform.com/
- type: Blog
  url: https://demandscience.com/resources/blog/
- type: TermsOfService
  url: https://demandscience.com/terms-of-service/
- type: PrivacyPolicy
  url: https://demandscience.com/privacy-policy/
- type: GitHubOrganization
  url: https://github.com/demandscience
- type: Authentication
  url: authentication/terminus-authentication.yml
- type: Lifecycle
  url: lifecycle/terminus-lifecycle.yml
- type: Deprecation
  url: https://support.demandscience.com/hc/en-us/articles/46047614705811-Chat-Experiences-Deprecation-December-31-2025
- type: Conformance
  url: conformance/terminus-conformance.yml
- type: DomainSecurity
  url: security/terminus-domain-security.yml
- type: TrustCenter
  url: security/terminus-trust-center.yml
- type: LLMsTxt
  url: llms/terminus-llms.txt
- type: APIReference
  url: https://support.demandscience.com/hc/en-us/sections/38485678357267-API-Documentation
- type: GettingStarted
  url: https://support.demandscience.com/hc/en-us/sections/201012678-Getting-Started-with-DemandScience
- type: Pricing
  url: https://demandscience.com/faq/pricing-fit-commercial/
- type: GitHubOrganization
  url: https://github.com/GetTerminus
- type: Packages
  url: packages/terminus-packages.yml
- type: Conventions
  url: conventions/terminus-conventions.yml
- type: DataModel
  url: data-model/terminus-data-model.yml
- type: ErrorCatalog
  url: errors/terminus-problem-types.yml
- type: RateLimits
  url: rate-limits/terminus-rate-limits.yml
- type: Plans
  url: plans/terminus-plans-pricing.yml
- type: Sandbox
  url: sandbox/terminus-sandbox.yml
x-enrichment:
  date: '2026-08-12'
  status: enriched
  artifacts_added: 7
  pass: local-v1