ZeroBounce website screenshot

ZeroBounce

ZeroBounce is an email validation and deliverability platform that verifies email addresses, detects spam traps and abuse accounts, scores leads, and helps senders reduce bounce rates and protect sender reputation. The platform provides real-time and batch email validation, credit balance checks, file-based validation jobs, email finder, domain search, and AI scoring through a versioned REST API. The ZeroBounce v2 API uses a per- request api_key parameter and supports both global and EU endpoints.

ZeroBounce publishes 1 API on the APIs.io network: Validation API. Tagged areas include Email Validation, Email Deliverability, Email Verification, Marketing, and Lead Scoring.

ZeroBounce’s developer surface includes documentation, pricing, signup flow, GitHub presence, engineering blog, and 6 more developer resources.

🌐 Visit website 📡 Source on GitHub
24.6/100 emerging ▬ flat Agent 19/100 agent aware Full breakdown ↓
scored 2026-07-28 · rubric v0.6
3 APIs
Email ValidationEmail DeliverabilityEmail VerificationMarketingLead ScoringAnti-Spam

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-07-28 · rubric v0.6
Composite quality — 24.6/100 · emerging
Contract Quality 10.6 / 25
Developer Ergonomics 2.2 / 20
Commercial Clarity 3.7 / 20
Operational Transparency 0.7 / 13
Governance 0.0 / 12
Discoverability 7.4 / 10
Agent readiness — 19/100 · agent aware
Machine-Readable Contract 18 / 18
Agentic Access Contract 10 / 10
MCP Server 0 / 12
Machine-Readable Auth 0 / 10
Idempotency 0 / 9
Stable Error Semantics 0 / 8
Request/Response Examples 0 / 7
Rate-Limit Signaling 0 / 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/zerobounce: 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.

ZeroBounce Email Validation API

Real-time and batch email validation API including credit balance, API usage, file submission and retrieval, email finder, domain search, and AI scoring endpoints. Authenticated...

ZeroBounce Email Validation API (EU)

EU-region endpoint of the ZeroBounce v2 email validation API for customers requiring European data residency.

ZeroBounce Validation API

The Validation API from ZeroBounce — 2 operation(s) for validation.

Open Collections 1

Open, tool-agnostic API collections (OpenAPI-derived and Bruno).

ZeroBounce Validate Email plugin

OPEN COLLECTION

Security Posture 3

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

Zerobounce Domain Security

TLSv1.3 · HSTS · DNSSEC · DMARC

SECURITY

Zerobounce Vulnerability Disclosure

Hackerone

SECURITY

Zerobounce Trust Center

SOC 2, ISO 27001, PCI DSS, HIPAA, GDPR

SECURITY

Agentic Access 1

Recommended x-agentic-access execution contracts for AI agents.

Zerobounce Agentic Access

2 operations · 2 acting

2 operations · 2 acting

AGENTIC

Resources

Get Started 1

Portal, sign-up, and the first successful call

Signup
Signup

Documentation 1

Reference material describing how the API behaves

Documentation
Documentation

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess
AgenticAccess

Build 1

SDKs, sample code, and the tooling you integrate with

GitHub
GitHub

Access & Security 3

Authentication, authorization, and security posture

TrustCenter
TrustCenter
 VulnerabilityDisclosure
VulnerabilityDisclosure
 DomainSecurity
DomainSecurity

Commercial 1

Pricing, plans, and the legal terms of use

Pricing
Pricing

Company 3

The organization behind the API

LinkedIn
LinkedIn
 Website
Website
 Blog
Blog

Source (apis.yml)

apis.yml Raw ↑ 
aid: zerobounce
name: ZeroBounce
description: ZeroBounce is an email validation and deliverability platform that verifies email addresses, detects spam traps
  and abuse accounts, scores leads, and helps senders reduce bounce rates and protect sender reputation. The platform provides
  real-time and batch email validation, credit balance checks, file-based validation jobs, email finder, domain search, and
  AI scoring through a versioned REST API. The ZeroBounce v2 API uses a per- request api_key parameter and supports both global
  and EU endpoints.
type: Index
accessModel:
  pricing: unknown
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Unknown
  confidence: low
  source: []
  generated: '2026-07-22'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/zerobounce.png
tags:
- Email Validation
- Email Deliverability
- Email Verification
- Marketing
- Lead Scoring
- Anti-Spam
url: https://raw.githubusercontent.com/api-evangelist/zerobounce/refs/heads/main/apis.yml
created: '2026-05-11'
modified: '2026-05-11'
specificationVersion: '0.19'
apis:
- aid: zerobounce:email-validation-api
  name: ZeroBounce Email Validation API
  description: Real-time and batch email validation API including credit balance, API usage, file submission and retrieval,
    email finder, domain search, and AI scoring endpoints. Authenticated via api_key query parameter.
  humanURL: https://www.zerobounce.net/docs/email-validation-api-quickstart
  baseURL: https://api.zerobounce.net/v2
  tags:
  - Email Validation
  - Email Deliverability
  - Lead Scoring
  properties:
  - type: Documentation
    url: https://www.zerobounce.net/docs/email-validation-api-quickstart
  - type: GettingStarted
    url: https://www.zerobounce.net/docs/email-validation-api-quickstart/v2-validate-emails
  - type: Sandbox
    url: https://www.zerobounce.net/docs/email-validation-api-quickstart/v2-sandbox-mode
- aid: zerobounce:email-validation-api-eu
  name: ZeroBounce Email Validation API (EU)
  description: EU-region endpoint of the ZeroBounce v2 email validation API for customers requiring European data residency.
  humanURL: https://www.zerobounce.net/docs/email-validation-api-quickstart
  baseURL: https://api-eu.zerobounce.net/v2
  tags:
  - Email Validation
  - EU Region
  - Data Residency
  properties:
  - type: Documentation
    url: https://www.zerobounce.net/docs/email-validation-api-quickstart
- aid: zerobounce:zerobounce-validation-api
  name: ZeroBounce Validation API
  description: The Validation API from ZeroBounce — 2 operation(s) for validation.
  humanURL: https://www.zerobounce.net/docs/email-validation-api-quickstart
  baseURL: https://api.zerobounce.net/v2
  tags:
  - Validation
  properties:
  - type: OpenAPI
    url: openapi/zerobounce-validation-api-openapi.yml
common:
- type: AgenticAccess
  url: agentic-access/zerobounce-agentic-access.yml
- type: TrustCenter
  url: security/zerobounce-trust-center.yml
- type: VulnerabilityDisclosure
  url: security/zerobounce-vulnerability-disclosure.yml
- type: DomainSecurity
  url: security/zerobounce-domain-security.yml
- type: LinkedIn
  url: https://www.linkedin.com/company/zerobounce-net
- type: Website
  url: https://www.zerobounce.net
- type: Documentation
  url: https://www.zerobounce.net/docs
- type: Pricing
  url: https://www.zerobounce.net/pricing
- type: Signup
  url: https://www.zerobounce.net/members/createaccount
- type: GitHub
  url: https://github.com/zerobounce
- url: https://www.zerobounce.net/blog/feed
  type: Blog
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com