EmailListChecker

EmailListChecker provides an AI-native email verification service that cleans email lists, explains catch‑all and risky addresses in plain English, and helps protect sender reputation. Users get 100 free checks, no credit card required, with real‑time API and bulk verification options. The platform also offers email finding, automated cleaning, and integration capabilities for businesses seeking reliable deliverability.

EmailListChecker is profiled on the APIs.io network. Tagged areas include Email Verification, Artificial Intelligence, Software-as-a-Service, Data Cleaning, and Bulk Verification.

EmailListChecker’s developer surface includes support, pricing, engineering blog, and 15 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

25.2/100 emerging Agent 1/100 human only Full breakdown ↓
scored 2026-11-13 · rubric v0.28.0 · Show this score on your site →

AccessPaidOpen

0 APIs

Email Verification Artificial Intelligence Software-as-a-Service Data Cleaning Bulk Verification Company

Kin Score

Kin Score How this is scored →
scored 2026-11-13 · rubric v0.28.0

Composite quality — 25.2/100 · emerging

Contract Quality 0.0 / 21

Developer Ergonomics 1.2 / 17

Access Clarity 12.7 / 17

Operational Transparency 3.2 / 11

Contract Governance 0.0 / 10

Discoverability 4.1 / 9

Regulatory Posture 2.6 / 15

Agent readiness — 1/100 · human only

Machine-Readable Contract 0 / 18

Agentic Access Contract 0 / 10

Documented Reversibility 0 / 6

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 8 / 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 could not be measured. We hold no machine-readable contract for this provider to read, so there is nothing to measure a write surface against. Excluded rather than scored zero: never-measured and measured-empty are different facts. Publishing an OpenAPI is what makes this facet — and several others — scorable at all.

The six quality facets above are damped to 85 points between them, because the conditional facet above carries the other 15. That is why each facet's contribution is shown against a damped maximum: raising a quality facet moves the composite by 85% 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):

Machine-Readable Contract +18 pts — api_specs includes an OpenAPI document Ask about this →
MCP Server +12 pts — deployment.mode + probe verdict on the mcp/ manifest, not the pointer; an unprobed slug falls back to authorship Ask about this →
Agentic Access Contract +10 pts — agentic_access artifact present (x-agentic-access), graded by author Ask about this →
Machine-Readable Auth +10 pts — a served openid-configuration/oauth-authorization-server carrying `issuer` (served), else the securitySchemes class in the provider OpenAPIs — bound (mutualTLS, DPoP, Signature) > negotiable (oauth2 authorizationCode/clientCredentials, openIdConnect) > bearer (http bearer, apiKey) Ask about this →
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) Ask about this →
Stable Error Semantics +8 pts — OpenAPI $refs a shared error schema across 4xx/5xx responses (verified), else common[].type includes ErrorCatalog / ErrorCodes / DeclineCodes Ask about this →

12 more unmet checks in the Agent Readiness table above.

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

Contract Quality scores 0.0 — up to +25.0 composite points Ask about this →
Developer Ergonomics scores 7.1 — up to +18.6 composite points Ask about this →
Contract Governance scores 0.0 — up to +12.0 composite points Ask about this →

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.

Not sure how this applies to your stack? Ask about any one item. Kin Lane reads every question, looks at your profile and your situation, and replies with what a fix would take — scoped to that one area, priced up front, yours whether you ship it or not. Ask a question →

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/emaillistchecker-io/apis.yml: open an issue on github.com/api-evangelist/emaillistchecker-io 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 →

Standards implemented 1

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.

Agent2Agent

measured — observed by APIs.io (flavored)

EmailListChecker API pricing

Prices published by EmailListChecker, read 2026-11-06 from www.emaillistchecker.io/pricing.

Plan	Price
5,000 credits	$20.00
10,000 credits	$34.00
25,000 credits	$69.00
50,000 credits	$125
100,000 credits	$209
250,000 credits	$454
500,000 credits	$839
1,000,000 credits	$1,399

Plan details, limits and sources →

Pricing Plans 1

Published pricing tiers and plan structures.

EmailListChecker Plans Pricing

8 plans

PLANS

Security Posture 2

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

EmailListChecker Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

EmailListChecker Trust Center

GDPR

SECURITY

Resources

Get Started 1

Portal, sign-up, and the first successful call

Login

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

LLMsTxt

LLMsTxt

Build 1

SDKs, sample code, and the tooling you integrate with

GitHubOrganization

GitHubOrganization

Access & Security 4

Authentication, authorization, and security posture

Compliance

Security

TrustCenter

DomainSecurity

Operate 2

Status, limits, changes, and where to get help

Support

Support

StatusPage

StatusPage

Commercial 4

Pricing, plans, and the legal terms of use

Plans

TermsOfService

PrivacyPolicy

Pricing

Company 2

The organization behind the API

Blog

Blog

Website

Website

Other 3

Properties that don't map to a standard resource type

AgentCard

AgentCard

Hosts

Hosts

Vendors

Vendors

Source (apis.yml)

aid: emaillistchecker-io
name: EmailListChecker
accessModel:
  pricing: paid
  onboarding: open
  trial: false
  try_now: false
  public: true
  label: Paid · Open access
  confidence: low
  probe_state: unreadable
  source:
  - plans
  - security
  generated: '2026-11-13'
  method: derived
image: https://www.emaillistchecker.io/opengraph-image?4b03eecb8009391e
description: EmailListChecker provides an AI-native email verification service that cleans email lists, explains catch‑all
  and risky addresses in plain English, and helps protect sender reputation. Users get 100 free checks, no credit card required,
  with real‑time API and bulk verification options. The platform also offers email finding, automated cleaning, and integration
  capabilities for businesses seeking reliable deliverability.
url: https://artifacts.apis.io/emaillistchecker-io/apis.yml
x-type: company
x-source: harvest:mcp-registry
x-tier: profiled
x-tier-reason: enrichment pass 2026-11-06 (modular-v1; was harvest)
specificationVersion: '0.20'
created: '2026-11-06'
modified: '2026-11-06'
tags:
- Email Verification
- Artificial Intelligence
- Software-as-a-Service
- Data Cleaning
- Bulk Verification
- Company
tags_raw:
- EmailVerification
- AI
- SaaS
- DataCleaning
- BulkVerification
- Company
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: Plans
  url: plans/emaillistchecker-io-plans-pricing.yml
- type: Compliance
  url: https://www.emaillistchecker.io/security
- type: LLMsTxt
  url: llms/emaillistchecker-io-llms.txt
- type: AgentCard
  url: a2a/emaillistchecker-io-a2a.yml
- type: Hosts
  url: hosts/emaillistchecker-io-hosts.yml
- type: Vendors
  url: vendors/emaillistchecker-io-vendors.yml
- type: TermsOfService
  url: https://www.emaillistchecker.io/legal/terms
- type: Support
  url: https://support.emaillistchecker.io/
- type: StatusPage
  url: https://www.emaillistchecker.io/status
- type: Security
  url: https://www.emaillistchecker.io/security
- type: PrivacyPolicy
  url: https://www.emaillistchecker.io/legal/privacy
- type: Pricing
  url: https://www.emaillistchecker.io/pricing
- type: Login
  url: https://platform.emaillistchecker.io/auth/login
- type: GitHubOrganization
  url: https://github.com/emaillistchecker
- type: Blog
  url: https://www.emaillistchecker.io/blog
- type: TrustCenter
  url: security/emaillistchecker-io-trust-center.yml
- type: DomainSecurity
  url: security/emaillistchecker-io-domain-security.yml
- type: Website
  url: https://emaillistchecker.io/
apis: []
x-coverage:
  state: unreadable
  reason: no-machine-readable-spec
  detail: Provider's website offers API documentation but no machine‑readable OpenAPI/AsyncAPI/GraphQL spec was found.
  evidence:
  - url: https://api.emaillistchecker.io/openapi.json
    status: no-response
  checked: '2026-11-06'
x-enrichment:
  date: '2026-11-06'
  status: enriched
  artifacts_added: 17
  pass: modular-v1
  engine: identity=local,contract=local,surfaces=local,docs=local,regulatory=local

EmailListChecker API — frequently asked questions

How much does the EmailListChecker API cost?

EmailListChecker publishes its prices; its 5,000 credits plan is $20.00 as of 2026-11-06. APIs.io lists 8 pricing plans for EmailListChecker, with each plan's price, limits and inclusions under Pricing on this page.

Is the EmailListChecker API ready for AI agents?

EmailListChecker has a Kin Score of 25.2 out of 100 (emerging) and an Agent Readiness score of 1.4 (human-only), scored by API Evangelist on 2026-11-13.

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