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, activity data, list evaluation and AI scoring through a versioned REST API. The ZeroBounce v2 API uses a per-request api_key parameter with no OAuth or scopes, and is served from region-split hosts for US and EU data residency plus a separate bulk host for asynchronous file jobs. ZeroBounce also ships an official MCP server and first-party SDKs across nine languages.

ZeroBounce publishes 6 API contracts indexed on the APIs.io network, including Validation API, and 5 more. Tagged areas include Email Verification, Email Deliverability, Marketing, Lead Scoring, and Anti-Spam.

The ZeroBounce catalog on APIs.io includes 1 event-driven AsyncAPI specification and 1 Spectral governance ruleset.

ZeroBounce’s developer surface includes documentation, API reference, getting-started guide, support, pricing, signup flow, GitHub presence, and 33 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

71.4/100 exemplar ▬ flat Agent 33/100 agent ready Front door AI 3/6 light Heartbeat 100/100 alive saas Full breakdown ↓
scored 2026-11-06 · rubric v0.27.0 · Show this score on your site →

AccessFreemiumFree trial⚡ Free to try

1 published contract 1 MCP Servers 3 Agent Skills

Email Verification Email Deliverability Marketing Lead Scoring Anti-Spam Data Quality Email FinderDeliverability MonitoringDMARC Email

What people ask ZeroBounce 1

The questions people put to an LLM, and the jobs they hand an agent, that ZeroBounce's APIs answer — each one linked to the operation that does it. Generated by API Evangelist

ZeroBounce Validation API Check whether a single email address is valid “How do I check if one email address is real before I send to it?” Validate a list of email addresses in one request “Is there a way to verify a whole list of email addresses at once?”

Kin Score

Kin Score How this is scored →
scored 2026-11-06 · rubric v0.27.0

Composite quality — 71.4/100 · exemplar

Contract Quality 9.2 / 19

Developer Ergonomics 11.2 / 15

Access Clarity 15.0 / 15

Operational Transparency 8.2 / 10

Contract Governance 2.9 / 9

Discoverability 5.4 / 8

Regulatory Posture 5.3 / 15

Create-or-Update Ergonomics 0.0 / 10

Agent readiness — 33/100 · agent ready

Machine-Readable Contract 18 / 18

Agentic Access Contract 10 / 10

Documented Reversibility 0 / 6

MCP Server 12 / 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 6 / 6

Agent Skills 5 / 5

Well-Known Catalog 0 / 4

Consent & Bot Identity 0 / 3

A2A Agent Card 0 / 8

Dry-Run / Simulate Mode 0 / 4

Delegated User Identity 0 / 6

Protected Resource Metadata 0 / 5

Registration Without a Human 0 / 6

Agentic Commerce Well-Known Document 0 / 5

Pagination 5 / 5

Distinct Operations 3 / 3

MCP Tool Quality 6 / 6

Regulatory Posture applies to this provider. Its tags matched the Horizontal (data, software, accessibility, platform) regime, so Regulatory Posture carries 15 points of the composite. If this regime is wrong for your business, say so on your provider repo — the applicability map is public and we will correct it.

Create-or-Update Ergonomics applies to this provider. This API accepts writes, so it carries 10 points of the composite. It is scored from the published contracts themselves: whether a caller can create-or-update in one call, whether the write accepts a key the caller already holds, and whether the response says which branch ran. Without that, every write needs a search-and-branch in front of it, and the first time that check is skipped a duplicate record is created. Scored against the observed mean rather than raw — a provider at the catalog average is unchanged by this facet, not penalised by it.

The six quality facets above are damped to 75 points between them, because the conditional facet above carries the other 25. That is why each facet's contribution is shown against a damped maximum: raising a quality facet moves the composite by 75% of its nominal weight, not 100%. The full arithmetic is at apis.io/rating/.

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Agent readiness — checks not met, largest first (exact, from this profile):

Idempotency +9 pts — OpenAPI mutating operations declare an idempotency key — a header, a request-body property, or a named de-duplication token whose own description says so (verified); else common[].type matches /idempoten/i (documented)
A2A Agent Card +8 pts — a2a/-a2a.yml manifest, graded on conformance.grade against A2A 1.0.0
Request/Response Examples +7 pts — share of operations carrying request/response examples; else an Examples / Code Samples link
Registration Without a Human +6 pts — a `registration_endpoint` in the served RFC 8414 / OIDC discovery document
Delegated User Identity +6 pts — a served discovery document listing authorization_code in grant_types_supported (served), else an oauth2 authorizationCode flow or openIdConnect declared in an OpenAPI (documented)
Documented Reversibility +6 pts — a reversal operation in the contract, graded up when a window is documented too

5 more unmet checks in the Agent Readiness table above.

Kin Score — facets with the most composite points still available (weight × headroom):

Contract Quality scores 49.0 — up to +12.8 composite points
Contract Governance scores 31.8 — up to +8.2 composite points
Developer Ergonomics scores 74.4 — up to +5.1 composite points

Each check links to what satisfies it. Publish the artifact, or tell us where it already lives, and the score moves on the next scoring run.

Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. Every facet and dimension name above is a link: it opens that measurement's own page — what it means, the exact checks that feed it, how the whole catalog distributes on it, and the providers at the top of it. This rating is computed from the provider profile at artifacts.apis.io/zerobounce/apis.yml: open an issue on github.com/api-evangelist/zerobounce to ask a question or point us at an artifact you publish. Submit an artifact on GitHub — free → Manage your own listing — the Influence plan, $499/mo →

Markets this provider is in provisional

The Kin Score Market layer reads a provider inside its market: its position, and how deep its integrations go. Depth is only comparable within a position. Provisional and unweighted: not part of the Kin Score or agent readiness.

Market	Position	Depth	Registered MCP server	Declares compatibility
Salesforce AppExchange (CRM, outbound, business-process automation)	builds-on	49.7	-	-
HubSpot App Marketplace (CRM add-ons, outbound, performance marketing, chat)	builds-on	49.7	-	-
Browser Extension Stores (company-published Firefox add-ons; Chrome Web Store unreadable)	builds-on	49.7	-	-
Wix App Market (third-party apps for Wix sites)	builds-on	49.7	-	-
Official SDKs on Packagist, pub.dev and Hex	builds-on	49.7	-	-
Adobe Exchange (publishers of Creative Cloud, Experience Cloud and Document Cloud integrations)	builds-on	49.7	-	-

Registered MCP server and declares compatibility are report only — not weighted. Undeclared means we found nothing we can read, so there is no number: we never infer integrations.

Standards implemented 2

Standards this provider implements or carries. De facto ones are profiled and measured by the API Commons; formal ones come from the standards directory and are linked by the provider's own tags. The evidence column says how each claim was established — not that it was made.

Model Context Protocol (MCP)

measured — observed by APIs.io (documented)

OpenAPI

measured — observed by APIs.io (published)

APIs 6

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, activity data and AI scoring endpoints....

ZeroBounce Email Validation API (US)

US-region endpoint of the ZeroBounce v2 email validation API. Introduced October 2025 alongside the EU host so that, per ZeroBounce's own documentation, "validations and other i...

ZeroBounce Email Validation API (EU)

EU-region endpoint of the ZeroBounce v2 email validation API for customers requiring European data residency, where validations and interactions occur only within the European U...

ZeroBounce Bulk API

Asynchronous file-job surface for bulk email validation, bulk AI scoring, bulk email finder, bulk domain search, List Evaluator and Amazon S3 file operations. Runs on a separate...

ZeroBounce Validation API

The ZeroBounce ChatGPT-plugin validation surface — 2 operations for single and batch email validation, served from members-api.zerobounce.net. The single-validation operation ac...

ZeroBounce MCP Server

Official ZeroBounce Model Context Protocol server, published by ZeroBounce under Apache-2.0 and distributed on npm as @zerobounce/mcp. Exposes 16 tools covering validation, AI s...

Open Collections 2

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

ZeroBounce Validate Email plugin Validation API

OPEN COLLECTION

ZeroBounce Validate Email plugin

OPEN COLLECTION

MCP Servers 1

Model Context Protocol servers that expose these APIs to AI agents.

ZeroBounce MCP Server

Official ZeroBounce Model Context Protocol server. Exposes ZeroBounce email validation, AI scoring, email finder, domain search, activity data, credit and bulk-file operations a...

MCP SERVER

Agent Skills 3

Packaged agent skills for driving this provider's APIs from an AI assistant.

zerobounce-bulk-validate-file

AGENT SKILL

zerobounce-find-and-verify-contact

AGENT SKILL

zerobounce-validate-single-email

AGENT SKILL

ZeroBounce API pricing

Prices published by ZeroBounce, read 2026-10-28 from www.zerobounce.net/pricing.

Plan	Price
ZeroBounce ONE™ Subscription	$99/mo Includes: Email Validation / Scoring Credits, warmup seeds, inbox placement tests, email finder, blacklist mon
Pay as You Go	$39 USD for validating 2,000 email addresses Includes: 2,000 validations (minimum purchase)
Freemium	$0/mo Includes: 100 Validation Credits, 1 Inbox Test, 1 Email Server Test, 1 Blacklist Monitor, 10 Email Finder

Plan details, limits and sources →

Rate limits

: 80000 1 hour
: 80000 10 seconds
: 800 1 hour

All 6 limits →

Billed by: subscription (minimum 10,000 credits) · FinOps profile →

Pricing Plans 2

Published pricing tiers and plan structures.

Zerobounce Plans Pricing

3 plans

PLANS

Zerobounce Price Estimates

0 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Zerobounce Rate Limits

6 limits

RATE LIMITS

Service Levels 1

Uptime the provider promises or reports, as SLA4OAI. Read from its own pages; APIs.io runs no monitors.

ZeroBounce

SLA

FinOps 1

Cost, billing, and metering signals for API financial operations.

Zerobounce Finops

FINOPS

Event Specifications 1

AsyncAPI definitions for this provider's event-driven and streaming APIs.

Zerobounce Webhooks

ASYNCAPI

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs.

ZeroBounce API Rules

33 rules · 31 errors 1 warnings 1 info

SPECTRAL

OpenAPI Overlays 2

Overlays applied on top of this provider's contracts. Each card says who wrote it: a document the provider publishes, or one API Evangelist derived or generated.

Zerobounce Validation Api Overlay

7 actions · update · zerobounce-validation-api-openapi.yml

DERIVED

Zerobounce Validation Api Phrasing Overlay

3 actions · phrasing · zerobounce-validation-api-openapi.yml

GENERATED

Security Posture 4

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

Zerobounce Authentication

3 schemes

SECURITY

Zerobounce Domain Security

TLSv1.3 · HSTS · DNSSEC · DMARC

SECURITY

Zerobounce Vulnerability Disclosure

Intigriti

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

AGENTIC

Resources

Get Started 4

Portal, sign-up, and the first successful call

DeveloperPortal

GettingStarted

SignUp

Sandbox

Documentation 2

Reference material describing how the API behaves

Documentation

Documentation

APIReference

APIReference

Agent Surfaces 4

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess

MCPServer

AgentSkill

LLMsTxt

Design & Contract 6

Pagination, idempotency, versioning, errors, and events

Conformance

Lifecycle

Conventions

ErrorCatalog

DataModel

Webhooks

Build 6

SDKs, sample code, and the tooling you integrate with

GitHubOrganization

GitHub

Packages

SDKs

ToolCrosswalk

Postman

Access & Security 6

Authentication, authorization, and security posture

TrustCenter

TrustCenter

VulnerabilityDisclosure

VulnerabilityDisclosure

Security

DomainSecurity

Compliance

Authentication

Operate 4

Status, limits, changes, and where to get help

Support

StatusPage

ChangeLog

RateLimits

Commercial 4

Pricing, plans, and the legal terms of use

Pricing

Plans

TermsOfService

PrivacyPolicy

Company 3

The organization behind the API

LinkedIn

Website

Website

Blog

Blog

Other 1

Properties that don't map to a standard resource type

Overlay

Overlay

Source (apis.yml)

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, activity
  data, list evaluation and AI scoring through a versioned REST API. The ZeroBounce v2 API uses a per-request api_key parameter
  with no OAuth or scopes, and is served from region-split hosts for US and EU data residency plus a separate bulk host for
  asynchronous file jobs. ZeroBounce also ships an official MCP server and first-party SDKs across nine languages.
type: Index
deliveryModel:
  model: saas
  license_evidence:
    not_product:
    - zerobounce/zerobounce-mcp
  open_source: unknown
  commercial: true
  callable_host: true
  label: Hosted service · you call their endpoint
  confidence: low
  source:
  - openapi
  - pricing
  - repository-not-product
  generated: '2026-09-25'
  method: derived
accessModel:
  pricing: freemium
  onboarding: self-service
  trial: true
  try_now: true
  public: true
  label: Freemium self-service
  confidence: high
  source:
  - https://www.zerobounce.net/pricing
  - https://www.zerobounce.net/members/createaccount
  - https://www.zerobounce.net/free-email-verifier
  generated: '2026-08-13'
  method: searched
  note: Upgraded from unknown/derived. ZeroBounce publishes a permanent Freemium tier (100 validation credits per month, refilling),
    self-service account creation, a published price for the entry ZeroBounce ONE subscription ($99/month), and a keyless
    browser verifier plus 3 free unauthenticated plugin validations per day.
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/zerobounce.png
tags:
- Email Verification
- Email Deliverability
- Marketing
- Lead Scoring
- Anti-Spam
- Data Quality
- Email Finder
- Deliverability Monitoring
- DMARC
- Email
tags_raw:
- Email Validation
- Email Deliverability
- Email Verification
- Marketing
- Lead Scoring
- Anti-Spam
- Data Quality
- Email Finder
- Deliverability Monitoring
- DMARC
- Email
url: https://raw.githubusercontent.com/api-evangelist/zerobounce/refs/heads/main/apis.yml
created: '2026-05-11'
modified: '2026-08-13'
specificationVersion: '0.23'
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, activity data and AI scoring endpoints. Authenticated via api_key query parameter. This entry
    covers the legacy api.zerobounce.net host, which ZeroBounce's own endpoints documentation now describes as "the previous
    ZeroBounce endpoint", currently serving EU validations and interactions only.
  humanURL: https://www.zerobounce.net/docs/email-validation-api-quickstart
  baseURL: https://api.zerobounce.net/v2
  tags:
  - Email Verification
  - Email Deliverability
  - Lead Scoring
  tags_raw:
  - Email Validation
  - Email Deliverability
  - Lead Scoring
  properties:
  - type: Documentation
    url: https://www.zerobounce.net/docs/email-validation-api-quickstart
  - type: APIReference
    url: https://www.zerobounce.net/docs/api-dashboard/api-endpoints
  - 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
  - type: Authentication
    url: authentication/zerobounce-authentication.yml
  - type: RateLimits
    url: rate-limits/zerobounce-rate-limits.yml
  - type: ErrorCatalog
    url: errors/zerobounce-error-codes.yml
  - type: Conventions
    url: conventions/zerobounce-conventions.yml
  - type: DataModel
    url: data-model/zerobounce-data-model.yml
  - type: Webhooks
    url: asyncapi/zerobounce-webhooks.yml
- aid: zerobounce:email-validation-api-us
  name: ZeroBounce Email Validation API (US)
  description: US-region endpoint of the ZeroBounce v2 email validation API. Introduced October 2025 alongside the EU host
    so that, per ZeroBounce's own documentation, "validations and other interactions only occur within the United States".
    Identical paths and parameters to the other regional hosts.
  humanURL: https://www.zerobounce.net/docs/api-dashboard/api-endpoints
  baseURL: https://api-us.zerobounce.net/v2
  tags:
  - Email Verification
  - US Region
  - Data Residency
  tags_raw:
  - Email Validation
  - US Region
  - Data Residency
  properties:
  - type: Documentation
    url: https://www.zerobounce.net/docs/api-dashboard/api-endpoints
  - type: Authentication
    url: authentication/zerobounce-authentication.yml
  - type: RateLimits
    url: rate-limits/zerobounce-rate-limits.yml
- 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,
    where validations and interactions occur only within the European Union.
  humanURL: https://www.zerobounce.net/docs/email-validation-api-quickstart
  baseURL: https://api-eu.zerobounce.net/v2
  tags:
  - Email Verification
  - EU Region
  - Data Residency
  tags_raw:
  - Email Validation
  - EU Region
  - Data Residency
  properties:
  - type: Documentation
    url: https://www.zerobounce.net/docs/email-validation-api-quickstart
  - type: Authentication
    url: authentication/zerobounce-authentication.yml
  - type: RateLimits
    url: rate-limits/zerobounce-rate-limits.yml
- aid: zerobounce:bulk-api
  name: ZeroBounce Bulk API
  description: Asynchronous file-job surface for bulk email validation, bulk AI scoring, bulk email finder, bulk domain search,
    List Evaluator and Amazon S3 file operations. Runs on a separate, non-region-split host and is the only part of the ZeroBounce
    API with a durable resource identifier (file_id) and a completion callback (return_url).
  humanURL: https://www.zerobounce.net/docs/email-validation-api-quickstart/v2-file-management-api
  baseURL: https://bulkapi.zerobounce.net
  tags:
  - Email Verification
  - Bulk Processing
  - Webhook
  tags_raw:
  - Email Validation
  - Bulk Processing
  - Webhooks
  properties:
  - type: Documentation
    url: https://www.zerobounce.net/docs/email-validation-api-quickstart/v2-file-management-api
  - type: Webhooks
    url: asyncapi/zerobounce-webhooks.yml
  - type: Authentication
    url: authentication/zerobounce-authentication.yml
- aid: zerobounce:zerobounce-validation-api
  name: ZeroBounce Validation API
  description: The ZeroBounce ChatGPT-plugin validation surface — 2 operations for single and batch email validation, served
    from members-api.zerobounce.net. The single-validation operation accepts up to 3 unauthenticated requests per day without
    an API key. This is the only ZeroBounce surface with a published OpenAPI.
  humanURL: https://www.zerobounce.net/docs/email-validation-api-quickstart
  baseURL: https://members-api.zerobounce.net
  tags:
  - Validation
  properties:
  - type: OpenAPI
    url: openapi/zerobounce-validation-api-openapi.yml
  - type: Overlay
    url: overlays/zerobounce-validation-api-overlay.yaml
  - type: Documentation
    url: https://www.zerobounce.net/docs/email-validation-api-quickstart
- aid: zerobounce:mcp
  name: ZeroBounce MCP Server
  description: Official ZeroBounce Model Context Protocol server, published by ZeroBounce under Apache-2.0 and distributed
    on npm as @zerobounce/mcp. Exposes 16 tools covering validation, AI scoring, email finder, domain search, activity data,
    credits and bulk file jobs. Local stdio transport only — ZeroBounce publishes no hosted MCP endpoint.
  humanURL: https://github.com/zerobounce/zerobounce-mcp
  baseURL: https://github.com/zerobounce/zerobounce-mcp
  tags:
  - MCP
  - AI Agents
  - Email Verification
  tags_raw:
  - MCP
  - AI Agents
  - Email Validation
  properties:
  - type: MCPServer
    url: mcp/zerobounce-mcp.yml
  - type: ToolCrosswalk
    url: mcp/zerobounce-tool-crosswalk.yml
  - type: SourceCode
    url: https://github.com/zerobounce/zerobounce-mcp
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: Security
  url: security/zerobounce-vulnerability-disclosure.yml
- type: DomainSecurity
  url: security/zerobounce-domain-security.yml
- type: Compliance
  url: conformance/zerobounce-conformance.yml
- type: Conformance
  url: conformance/zerobounce-conformance.yml
- type: LinkedIn
  url: https://www.linkedin.com/company/zerobounce-net
- type: Website
  url: https://www.zerobounce.net
- type: DeveloperPortal
  url: https://www.zerobounce.net/apis
- type: Documentation
  url: https://www.zerobounce.net/docs
- type: APIReference
  url: https://www.zerobounce.net/docs/api-dashboard/api-endpoints
- type: GettingStarted
  url: https://www.zerobounce.net/docs/email-validation-api-quickstart/v2-validate-emails
- type: Support
  url: https://www.zerobounce.net/contact-us
- type: Pricing
  url: https://www.zerobounce.net/pricing
- type: Plans
  url: plans/zerobounce-plans-pricing.yml
- type: SignUp
  url: https://www.zerobounce.net/members/createaccount
- type: TermsOfService
  url: https://www.zerobounce.net/terms-of-use
- type: PrivacyPolicy
  url: https://www.zerobounce.net/privacy-policy
- type: GitHubOrganization
  url: https://github.com/zerobounce
- type: GitHub
  url: https://github.com/zerobounce
- url: https://www.zerobounce.net/blog/feed
  type: Blog
- type: StatusPage
  url: https://status.zerobounce.net
- type: Lifecycle
  url: lifecycle/zerobounce-lifecycle.yml
- type: ChangeLog
  url: changelog/zerobounce-changelog.yml
- type: Packages
  url: packages/zerobounce-packages.yml
- type: SDKs
  url: packages/zerobounce-packages.yml
- type: MCPServer
  url: mcp/zerobounce-mcp.yml
- type: ToolCrosswalk
  url: mcp/zerobounce-tool-crosswalk.yml
- type: AgentSkill
  url: skills/_index.yml
- type: LLMsTxt
  url: llms/zerobounce-llms.txt
- type: Authentication
  url: authentication/zerobounce-authentication.yml
- type: Conventions
  url: conventions/zerobounce-conventions.yml
- type: ErrorCatalog
  url: errors/zerobounce-error-codes.yml
- type: RateLimits
  url: rate-limits/zerobounce-rate-limits.yml
- type: Sandbox
  url: sandbox/zerobounce-sandbox.yml
- type: DataModel
  url: data-model/zerobounce-data-model.yml
- type: Webhooks
  url: asyncapi/zerobounce-webhooks.yml
- type: Overlay
  url: overlays/zerobounce-validation-api-overlay.yaml
- type: Postman
  url: collections/zerobounce-api-v2-official.postman_collection.json
- type: Integrations
  url: https://www.zerobounce.net/integrations
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
x-enrichment:
  date: '2026-08-13'
  status: enriched
  artifacts_added: 22
  pass: local-v1

ZeroBounce API — frequently asked questions

Does ZeroBounce have an API?

Yes. APIs.io lists 6 APIs from ZeroBounce, including ZeroBounce Email Validation API, ZeroBounce Email Validation API (US) and ZeroBounce Email Validation API (EU), and 3 more.

Is there an OpenAPI specification for the ZeroBounce API?

Yes. APIs.io indexes 1 OpenAPI specification for ZeroBounce, each linked for download from this page.

How do I authenticate with the ZeroBounce API?

ZeroBounce uses bearer-token authentication (3 schemes). The details are profiled on APIs.io as Zerobounce Authentication.

How much does the ZeroBounce API cost?

ZeroBounce publishes its prices; its ZeroBounce ONE™ Subscription plan is $99/mo as of 2026-10-28. APIs.io lists 3 pricing plans for ZeroBounce, with each plan's price, limits and inclusions under Pricing on this page.

Does ZeroBounce have an MCP server?

Yes. APIs.io lists 1 MCP server for ZeroBounce: Official ZeroBounce Model Context Protocol server. Exposes ZeroBounce email validation, AI scoring, email finder, domain search, activity data, credit and bulk-file operations as MCP tools for AI codi

Is the ZeroBounce API ready for AI agents?

ZeroBounce has a Kin Score of 71.4 out of 100 (exemplar) and an Agent Readiness score of 32.8 (agent-ready), scored by API Evangelist on 2026-11-06.

Work with this as data

Every provider here is available over the APIs.io API and to AI agents over MCP.

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https://apis.io/mcp

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get_provider_evidenceHow each part of their score was established. Free — the basis for a claim should not sit behind it.
get_provider_ratingPRO — composite, band, trend and facet scores.
apis_io_searchSTART HERE — APIs, providers and tags for one query, each with its total.
resolveTurn a domain, URL or GitHub org into the provider it belongs to.
find_cohortsEvery scored population of providers in the catalog.

All 92 tools →

Call it yourself

curl for this page

This provider

curl "https://apis.io/api/v1/providers/zerobounce"

All providers

curl "https://apis.io/api/v1/providers?limit=25"

Every operation they expose

curl "https://apis.io/api/v1/providers/zerobounce/operations?limit=25"

How their score was established

curl "https://apis.io/api/v1/providers/zerobounce/evidence"

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A second provider on the same verified email joins the account you already have.