SimpleVerifier

SimpleVerifier offers unlimited email verification services starting at $39 per month, providing real SMTP mailbox checks, catch‑all detection, disposable domain detection, role address detection, email finder, website enrichment, and SPF/DKIM/DMARC validation. The platform includes a REST API and remote MCP server for integration, free bulk domain availability checking, email provider lookup, Gmail address checking, and phone number formatting. Pro plans deliver the first 100,000 checks at full speed, with larger lists processed in a paced lane, ensuring no caps or cut‑offs.

SimpleVerifier is listed with 1 API on the APIs.io network. Tagged areas include Email Verification, Software-as-a-Service, BulkTools, and Security.

SimpleVerifier’s developer surface includes authentication, pricing, engineering blog, API reference, documentation, and 20 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

38.9/100 thin Agent 19/100 agent aware Full breakdown ↓
scored 2026-11-06 · rubric v0.27.0 · Show this score on your site →

AccessPaid

1 API

Email Verification Software-as-a-ServiceBulkToolsSecurity

Kin Score

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

Composite quality — 38.9/100 · thin

Contract Quality 0.0 / 21

Developer Ergonomics 6.5 / 17

Access Clarity 15.7 / 17

Operational Transparency 2.9 / 11

Contract Governance 0.5 / 10

Discoverability 5.0 / 9

Regulatory Posture 5.3 / 15

Agent readiness — 19/100 · agent aware

Machine-Readable Contract 0 / 18

Agentic Access Contract 0 / 10

Documented Reversibility 0 / 6

MCP Server 0 / 12

Machine-Readable Auth 10 / 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

Delegated User Identity 6 / 6

Protected Resource Metadata 5 / 5

Registration Without a Human 6 / 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
MCP Server +12 pts — deployment.mode + probe verdict on the mcp/ manifest, not the pointer; an unprobed slug falls back to authorship
Agentic Access Contract +10 pts — agentic_access artifact present (x-agentic-access), graded by author
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)
Stable Error Semantics +8 pts — OpenAPI $refs a shared error schema across 4xx/5xx responses (verified), else common[].type includes ErrorCatalog / ErrorCodes / DeclineCodes
A2A Agent Card +8 pts — a2a/-a2a.yml manifest, graded on conformance.grade against A2A 1.0.0

9 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
Developer Ergonomics scores 38.1 — up to +12.4 composite points
Contract Governance scores 4.5 — up to +11.5 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/simpleverifier-com/apis.yml: open an issue on github.com/api-evangelist/simpleverifier-com 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 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.

OAuth 2.0 Protected Resource Metadata

measured — observed by APIs.io (verified)

Dynamic Client Registration

measured — observed by APIs.io (published)

APIs 1

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

SimpleVerifier API

Verify email addresses and phone numbers via a single HTTP call.

SimpleVerifier API pricing

Prices published by SimpleVerifier, read 2026-11-05 from simpleverifier.com/pricing.

Plan	Price
Starter	$9/mo
Pro	$39/mo
Business	$99/mo
Agency	$249/mo
Pro + Phone	$49.99/mo

Plan details, limits and sources →

Pricing Plans 1

Published pricing tiers and plan structures.

Simpleverifier Com Plans Pricing

5 plans

PLANS

OpenAPI Overlays 1

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.

Simpleverifier Com Openapi Overlay

0 actions · update

UNRECORDED

Security Posture 4

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

Simpleverifier Com Authentication

1 scheme

SECURITY

Simpleverifier Com Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Simpleverifier Com Vulnerability Disclosure

security.txt · contact published

SECURITY

Simpleverifier Com Trust Center

SOC 2, ISO 27001, HIPAA, GDPR

SECURITY

Resources

Get Started 1

Portal, sign-up, and the first successful call

Login

Documentation 2

Reference material describing how the API behaves

APIReference

APIReference

Documentation

Documentation

Agent Surfaces 2

MCP servers, agent skills, and machine-readable catalogs

LLMsTxt

LLMsTxt

WellKnown

WellKnown

Design & Contract 1

Pagination, idempotency, versioning, errors, and events

Conformance

Conformance

Build 2

SDKs, sample code, and the tooling you integrate with

SDKs

SDKs

Packages

Packages

Access & Security 7

Authentication, authorization, and security posture

Compliance

Authentication

SecurityTxt

Security

TrustCenter

VulnerabilityDisclosure

VulnerabilityDisclosure

DomainSecurity

DomainSecurity

Scroll for all 7

Operate 1

Status, limits, changes, and where to get help

StatusPage

StatusPage

Commercial 4

Pricing, plans, and the legal terms of use

Plans

TermsOfService

PrivacyPolicy

Pricing

Company 3

The organization behind the API

Newsroom

Newsroom

Blog

Blog

Website

Website

Other 2

Properties that don't map to a standard resource type

Hosts

Hosts

Vendors

Vendors

Source (apis.yml)

aid: simpleverifier-com
name: SimpleVerifier
accessModel:
  pricing: paid
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Paid
  confidence: medium
  probe_state: gated
  source:
  - plans
  - authentication
  - security
  generated: '2026-11-06'
  method: derived
image: https://simpleverifier.com/og/unlimited
description: SimpleVerifier offers unlimited email verification services starting at $39 per month, providing real SMTP mailbox
  checks, catch‑all detection, disposable domain detection, role address detection, email finder, website enrichment, and
  SPF/DKIM/DMARC validation. The platform includes a REST API and remote MCP server for integration, free bulk domain availability
  checking, email provider lookup, Gmail address checking, and phone number formatting. Pro plans deliver the first 100,000
  checks at full speed, with larger lists processed in a paced lane, ensuring no caps or cut‑offs.
url: https://artifacts.apis.io/simpleverifier-com/apis.yml
x-type: company
x-source: harvest:new-submission
x-tier: profiled
x-tier-reason: enrichment pass 2026-11-05 (modular-v1; was harvest)
specificationVersion: '0.20'
created: '2026-11-05'
modified: '2026-11-05'
tags:
- Email Verification
- Software-as-a-Service
- BulkTools
- Security
tags_raw:
- EmailVerification
- SaaS
- API
- BulkTools
- Security
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: Plans
  url: plans/simpleverifier-com-plans-pricing.yml
- type: Compliance
  url: https://simpleverifier.com/security
- type: Authentication
  url: authentication/simpleverifier-com-authentication.yml
- type: Conformance
  url: conformance/simpleverifier-com-conformance.yml
- type: LLMsTxt
  url: llms/simpleverifier-com-llms.txt
- type: SecurityTxt
  url: well-known/simpleverifier-com-security.txt
- type: WellKnown
  url: well-known/simpleverifier-com-well-known.yml
- type: Hosts
  url: hosts/simpleverifier-com-hosts.yml
- type: Vendors
  url: vendors/simpleverifier-com-vendors.yml
- type: SDKs
  url: packages/simpleverifier-com-packages.yml
- type: Packages
  url: packages/simpleverifier-com-packages.yml
- type: TermsOfService
  url: https://simpleverifier.com/terms
- type: StatusPage
  url: https://simpleverifier.com/status
- type: Security
  url: https://simpleverifier.com/security
- type: PrivacyPolicy
  url: https://simpleverifier.com/privacy
- type: Pricing
  url: https://simpleverifier.com/pricing
- type: Newsroom
  url: https://simpleverifier.com/press
- type: Login
  url: https://simpleverifier.com/login
- type: Blog
  url: https://simpleverifier.com/blog
- type: APIReference
  url: https://simpleverifier.com/docs/quickstart
- type: TrustCenter
  url: security/simpleverifier-com-trust-center.yml
- type: VulnerabilityDisclosure
  url: security/simpleverifier-com-vulnerability-disclosure.yml
- type: DomainSecurity
  url: security/simpleverifier-com-domain-security.yml
- type: Website
  url: https://simpleverifier.com
- type: Documentation
  url: https://simpleverifier.com/docs/api
apis:
- name: SimpleVerifier API
  description: Verify email addresses and phone numbers via a single HTTP call.
  humanURL: https://simpleverifier.com/docs/api
  baseURL: https://simpleverifier.com/api/v1
  aid: simpleverifier-com:simpleverifier-api
x-submitted-by: support@simpleverifier.com (apisio-add-form, 2026-11-04)
x-coverage:
  state: gated
  reason: partner-login
  method: derived
  generated: '2026-11-05'
  generator: derive-coverage.py (pre-flight evidence)
  detail: the company serves an API surface but requires credentials before any description of it can be read
  evidence:
  - url: https://simpleverifier.com/openapi.json
    status: null
  - url: https://new.simpleverifier.com/openapi.json
    status: null
  - url: https://simpleverifier.com/api/mcp
    status: 401
  - url: https://new.simpleverifier.com/api/mcp
    status: 401
  - url: https://simpleverifier.com
    status: 200
x-enrichment:
  date: '2026-11-05'
  status: enriched
  artifacts_added: 24
  pass: modular-v1
  engine: identity=local,contract=local,surfaces=local,docs=local,regulatory=local

SimpleVerifier API — frequently asked questions

Does SimpleVerifier have an API?

Yes. APIs.io lists 1 API from SimpleVerifier, including SimpleVerifier API.

How do I authenticate with the SimpleVerifier API?

SimpleVerifier documents its authentication (1 scheme). The details are profiled on APIs.io as Simpleverifier Com Authentication.

How much does the SimpleVerifier API cost?

SimpleVerifier publishes its prices; its Starter plan is $9/mo as of 2026-11-05. APIs.io lists 5 pricing plans for SimpleVerifier, with each plan's price, limits and inclusions under Pricing on this page.

Is the SimpleVerifier API ready for AI agents?

SimpleVerifier has a Kin Score of 38.9 out of 100 (thin) and an Agent Readiness score of 18.7 (agent-aware), scored by API Evangelist on 2026-11-06.

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