BillionVerify

BillionVerify provides an email verification service with real‑time SMTP checks, bulk list cleaning, and a robust API for developers and AI agents. Users can validate single emails or upload large lists, receiving detailed deliverability status, risk scores, and actionable insights. The platform offers free daily credits, tiered pricing, and comprehensive documentation, supporting multiple languages and integrations.

BillionVerify publishes 5 API contracts indexed on the APIs.io network, including Account API, File Processing API, Health API, and 2 more. Tagged areas include Email Verification, Software-as-a-Service, Data Quality, and B2B.

The BillionVerify catalog on APIs.io includes 1 JSON-LD context and 1 Spectral governance ruleset.

BillionVerify’s developer surface includes authentication, support, signup flow, getting-started guide, API reference, documentation, pricing, and 25 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

47.9/100 developing Agent 47/100 agent ready Full breakdown ↓
scored 2026-11-06 · rubric v0.27.0 · Show this score on your site →

AccessPaid

1 published contract 2 Agent Skills

Email Verification Software-as-a-Service Data Quality B2B

Kin Score

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

Composite quality — 47.9/100 · developing

Contract Quality 13.9 / 21

Developer Ergonomics 6.2 / 17

Access Clarity 11.2 / 17

Operational Transparency 1.3 / 11

Contract Governance 2.2 / 10

Discoverability 4.9 / 9

Regulatory Posture 3.5 / 15

Agent readiness — 47/100 · agent ready

Machine-Readable Contract 18 / 18

Agentic Access Contract 10 / 10

Documented Reversibility 0 / 6

MCP Server 0 / 12

Machine-Readable Auth 10 / 10

Idempotency 0 / 9

Stable Error Semantics 8 / 8

Request/Response Examples 7 / 7

Rate-Limit Signaling 0 / 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 6 / 6

Protected Resource Metadata 0 / 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):

MCP Server +12 pts — deployment.mode + probe verdict on the mcp/ manifest, not the pointer; an unprobed slug falls back to authorship
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
Rate-Limit Signaling +7 pts — OpenAPI responses document X-RateLimit-* / RateLimit headers (verified), else a rate_limits artifact or RateLimits link (documented)
Documented Reversibility +6 pts — a reversal operation in the contract, graded up when a window is documented too
Protected Resource Metadata +5 pts — a served /.well-known/oauth-protected-resource carrying `resource` (documented), and naming its authorization_servers (verified)

4 more unmet checks in the Agent Readiness table above.

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

Developer Ergonomics scores 36.3 — up to +12.7 composite points
Operational Transparency scores 11.8 — up to +11.5 composite points
Contract Governance scores 22.0 — up to +9.4 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/billionverify-com/apis.yml: open an issue on github.com/api-evangelist/billionverify-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.

Dynamic Client Registration

measured — observed by APIs.io (published)

OpenAPI

measured — observed by APIs.io (published)

APIs 5

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

BillionVerify Account API

Account and credits management

BillionVerify File Processing API

Batch file upload and processing endpoints

BillionVerify Health API

Health check endpoints

BillionVerify Verification API

Email verification endpoints

BillionVerify Webhooks API

Webhook management endpoints

Agent Skills 2

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

billionverify-com-file-verification

AGENT SKILL

billionverify-com-manage-webhooks

AGENT SKILL

BillionVerify API pricing

Prices published by BillionVerify, read 2026-11-02 from billionverify.com/pricing.

Plan	Price
Starter (One-Time)	$20.00
Popular (One-Time)	$45.00
Professional (One-Time)	$80.00
Business (One-Time)	$150.00
Enterprise (One-Time)	$200.00
Ultimate (One-Time)	$350.00
Starter (Monthly)	$16.00/mo
Popular (Monthly)	$36.00/mo

All 18 plans, limits and sources →

Pricing Plans 1

Published pricing tiers and plan structures.

Billionverify Com Plans Pricing

18 plans

PLANS

Semantic Vocabularies 1

JSON-LD contexts and semantic vocabularies used across these APIs.

Billionverify Com Context

19 classes · 114 properties

JSON-LD

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs.

BillionVerify API Rules

70 rules · 63 errors 5 warnings 2 info

SPECTRAL

JSON Schema 6

Standalone JSON Schema definitions for this provider's data models.

ApiResponse

4 properties

JSON SCHEMA

BatchVerifyRequest

4 properties

JSON SCHEMA

FileUploadRequest

4 properties

JSON SCHEMA

SingleVerifyApiResponse

5 properties

JSON SCHEMA

SingleVerifyRequest

4 properties

JSON SCHEMA

WebhookCreateRequest

2 properties

JSON SCHEMA

Security Posture 3

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

Billionverify Com Authentication

4 schemes

SECURITY

Billionverify Com Domain Security

TLSv1.3 · HSTS · DNSSEC · DMARC

SECURITY

Billionverify Com Trust Center

SOC 2, GDPR

SECURITY

Agentic Access 1

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

Billionverify Com Agentic Access

13 operations · 7 acting

AGENTIC

Resources

Get Started 3

Portal, sign-up, and the first successful call

SignUp

SignUp

GettingStarted

GettingStarted

DeveloperPortal

DeveloperPortal

Documentation 2

Reference material describing how the API behaves

APIReference

APIReference

Documentation

Documentation

Agent Surfaces 4

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess

AgentSkill

LLMsTxt

WellKnown

Design & Contract 7

Pagination, idempotency, versioning, errors, and events

Spectral

JSONLD

Vocabulary

DataModel

ErrorCatalog

Conformance

Webhooks

Scroll for all 7

Build 1

SDKs, sample code, and the tooling you integrate with

GitHubOrganization

GitHubOrganization

Access & Security 5

Authentication, authorization, and security posture

Compliance

Authentication

Security

TrustCenter

DomainSecurity

Operate 1

Status, limits, changes, and where to get help

Support

Support

Commercial 4

Pricing, plans, and the legal terms of use

Plans

TermsOfService

PrivacyPolicy

Pricing

Company 3

The organization behind the API

Website

Website

Blog

Blog

About

About

Other 2

Properties that don't map to a standard resource type

Hosts

Hosts

Vendors

Vendors

Source (apis.yml)

aid: billionverify-com
name: BillionVerify
accessModel:
  pricing: paid
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Paid
  confidence: medium
  source:
  - plans
  - authentication
  - security
  generated: '2026-11-06'
  method: derived
image: https://billionverify.com/og/email-verification-tool.webp
description: BillionVerify provides an email verification service with real‑time SMTP checks, bulk list cleaning, and a robust
  API for developers and AI agents. Users can validate single emails or upload large lists, receiving detailed deliverability
  status, risk scores, and actionable insights. The platform offers free daily credits, tiered pricing, and comprehensive
  documentation, supporting multiple languages and integrations.
url: https://artifacts.apis.io/billionverify-com/apis.yml
x-type: company
x-source: harvest:mcp-registry
x-tier: profiled
x-tier-reason: enrichment pass 2026-11-02 (modular-v1; was harvest)
specificationVersion: '0.20'
created: '2026-11-02'
modified: '2026-11-02'
tags:
- Email Verification
- Software-as-a-Service
- Data Quality
- B2B
tags_raw:
- Email Verification
- API
- SaaS
- Data Quality
- B2B
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: AgenticAccess
  url: agentic-access/billionverify-com-agentic-access.yml
- type: Plans
  url: plans/billionverify-com-plans-pricing.yml
- type: Spectral
  url: rules/billionverify-com-rules.yml
- type: JSONLD
  url: json-ld/billionverify-com-context.jsonld
- type: Vocabulary
  url: vocabulary/billionverify-com-vocabulary.yml
- type: AgentSkill
  url: skills/_index.yml
- type: DataModel
  url: data-model/billionverify-com-data-model.yml
- type: Compliance
  url: https://billionverify.com/trust
- type: Authentication
  url: authentication/billionverify-com-authentication.yml
- type: ErrorCatalog
  url: errors/billionverify-com-problem-types.yml
- type: Conformance
  url: conformance/billionverify-com-conformance.yml
- type: LLMsTxt
  url: llms/billionverify-com-llms.txt
- type: WellKnown
  url: well-known/billionverify-com-well-known.yml
- type: Hosts
  url: hosts/billionverify-com-hosts.yml
- type: Vendors
  url: vendors/billionverify-com-vendors.yml
- type: Webhooks
  url: https://billionverify.com/integrations/webhook
- type: TermsOfService
  url: https://billionverify.com/terms
- type: Support
  url: https://support.billionverify.com/
- type: Security
  url: https://billionverify.com/security
- type: PrivacyPolicy
  url: https://billionverify.com/privacy
- type: GitHubOrganization
  url: https://github.com/BillionVerify
- type: SignUp
  url: https://billionverify.com/auth/sign-up.md
- type: GettingStarted
  url: https://billionverify.com/docs/quickstart
- type: DeveloperPortal
  url: https://api.billionverify.com`
- type: APIReference
  url: https://billionverify.com/docs/api-reference
- type: TrustCenter
  url: security/billionverify-com-trust-center.yml
- type: DomainSecurity
  url: security/billionverify-com-domain-security.yml
- type: Website
  url: https://billionverify.com/
- type: Documentation
  url: https://billionverify.com/docs
- type: Pricing
  url: https://billionverify.com/pricing
- type: Blog
  url: https://billionverify.com/blog
- type: About
  url: https://billionverify.com/about
apis:
- aid: billionverify-com:billionverify-com-account-api
  name: BillionVerify Account API
  description: Account and credits management
  humanURL: https://billionverify.com/docs/api-reference
  baseURL: https://api.billionverify.com
  tags:
  - Account
  properties:
  - type: OpenAPI
    url: openapi/billionverify-com-account-api-openapi.yml
  - type: JSONSchema
    url: json-schema/billionverify-com-batch-verify-request-schema.json
  - type: JSONSchema
    url: json-schema/billionverify-com-single-verify-request-schema.json
  - type: JSONSchema
    url: json-schema/billionverify-com-file-upload-request-schema.json
  - type: JSONSchema
    url: json-schema/billionverify-com-webhook-create-request-schema.json
  - type: JSONSchema
    url: json-schema/billionverify-com-single-verify-api-response-schema.json
  - type: JSONSchema
    url: json-schema/billionverify-com-api-response-schema.json
- aid: billionverify-com:billionverify-com-file-processing-api
  name: BillionVerify File Processing API
  description: Batch file upload and processing endpoints
  humanURL: https://billionverify.com/docs/api-reference
  baseURL: https://api.billionverify.com
  tags:
  - File Processing
  properties:
  - type: OpenAPI
    url: openapi/billionverify-com-file-processing-api-openapi.yml
  - type: JSONSchema
    url: json-schema/billionverify-com-batch-verify-request-schema.json
  - type: JSONSchema
    url: json-schema/billionverify-com-single-verify-request-schema.json
  - type: JSONSchema
    url: json-schema/billionverify-com-file-upload-request-schema.json
  - type: JSONSchema
    url: json-schema/billionverify-com-webhook-create-request-schema.json
  - type: JSONSchema
    url: json-schema/billionverify-com-single-verify-api-response-schema.json
  - type: JSONSchema
    url: json-schema/billionverify-com-api-response-schema.json
- aid: billionverify-com:billionverify-com-health-api
  name: BillionVerify Health API
  description: Health check endpoints
  humanURL: https://billionverify.com/docs/api-reference
  baseURL: https://api.billionverify.com
  tags:
  - Health
  properties:
  - type: OpenAPI
    url: openapi/billionverify-com-health-api-openapi.yml
  - type: JSONSchema
    url: json-schema/billionverify-com-batch-verify-request-schema.json
  - type: JSONSchema
    url: json-schema/billionverify-com-single-verify-request-schema.json
  - type: JSONSchema
    url: json-schema/billionverify-com-file-upload-request-schema.json
  - type: JSONSchema
    url: json-schema/billionverify-com-webhook-create-request-schema.json
  - type: JSONSchema
    url: json-schema/billionverify-com-single-verify-api-response-schema.json
  - type: JSONSchema
    url: json-schema/billionverify-com-api-response-schema.json
- aid: billionverify-com:billionverify-com-verification-api
  name: BillionVerify Verification API
  description: Email verification endpoints
  humanURL: https://billionverify.com/docs/api-reference
  baseURL: https://api.billionverify.com
  tags:
  - Verification
  properties:
  - type: OpenAPI
    url: openapi/billionverify-com-verification-api-openapi.yml
  - type: JSONSchema
    url: json-schema/billionverify-com-batch-verify-request-schema.json
  - type: JSONSchema
    url: json-schema/billionverify-com-single-verify-request-schema.json
  - type: JSONSchema
    url: json-schema/billionverify-com-file-upload-request-schema.json
  - type: JSONSchema
    url: json-schema/billionverify-com-webhook-create-request-schema.json
  - type: JSONSchema
    url: json-schema/billionverify-com-single-verify-api-response-schema.json
  - type: JSONSchema
    url: json-schema/billionverify-com-api-response-schema.json
- aid: billionverify-com:billionverify-com-webhooks-api
  name: BillionVerify Webhooks API
  description: Webhook management endpoints
  humanURL: https://billionverify.com/docs/api-reference
  baseURL: https://api.billionverify.com
  tags:
  - Webhook
  tags_raw:
  - Webhooks
  properties:
  - type: OpenAPI
    url: openapi/billionverify-com-webhooks-api-openapi.yml
  - type: JSONSchema
    url: json-schema/billionverify-com-batch-verify-request-schema.json
  - type: JSONSchema
    url: json-schema/billionverify-com-single-verify-request-schema.json
  - type: JSONSchema
    url: json-schema/billionverify-com-file-upload-request-schema.json
  - type: JSONSchema
    url: json-schema/billionverify-com-webhook-create-request-schema.json
  - type: JSONSchema
    url: json-schema/billionverify-com-single-verify-api-response-schema.json
  - type: JSONSchema
    url: json-schema/billionverify-com-api-response-schema.json
x-enrichment:
  date: '2026-11-02'
  status: enriched
  artifacts_added: 25
  pass: modular-v1
  engine: identity=local,contract=local,surfaces=local,docs=local,regulatory=local

BillionVerify API — frequently asked questions

Does BillionVerify have an API?

Yes. APIs.io lists 5 APIs from BillionVerify, including BillionVerify Account API, BillionVerify File Processing API and BillionVerify Health API, and 2 more.

Is there an OpenAPI specification for the BillionVerify API?

Yes. APIs.io indexes 5 OpenAPI specifications for BillionVerify, each linked for download from this page.

How do I authenticate with the BillionVerify API?

BillionVerify documents its authentication (4 schemes). The details are profiled on APIs.io as Billionverify Com Authentication.

How much does the BillionVerify API cost?

BillionVerify publishes its prices; its Starter (One-Time) plan is $20.00 as of 2026-11-02. APIs.io lists 18 pricing plans for BillionVerify, with each plan's price, limits and inclusions under Pricing on this page.

Is the BillionVerify API ready for AI agents?

BillionVerify has a Kin Score of 47.9 out of 100 (developing) and an Agent Readiness score of 46.6 (agent-ready), scored by API Evangelist on 2026-11-06.

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