NumLookupAPI

NumLookupAPI is a phone number validation and lookup REST API from everapi. A single GET request validates a phone number and returns whether it is valid along with its local and international formats, country prefix, ISO country code and name, geographic location, carrier, and line type (mobile, landline, etc.). It offers a free tier of 100 requests per month, is authenticated with a simple API key, and is used for phone verification, data validation, and caller identity enrichment.

NumLookupAPI publishes 2 APIs on the APIs.io network: Account API and Validation API. Tagged areas include Number Verification, Phone Validation, Phone Number Lookup, Carrier Lookup, and Line Type.

NumLookupAPI’s developer surface includes authentication, documentation, and 8 more developer resources.

🌐 Visit website 📡 Source on GitHub
41.3/100 thin ▬ flat Agent 48/100 agent ready Full breakdown ↓
scored 2026-07-27 · rubric v0.5
AccessFreemiumSelf serve⚡ Free to try
2 APIs
Number VerificationPhone ValidationPhone Number LookupCarrier LookupLine TypeVerificationData ValidationCaller Identity

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-07-27 · rubric v0.5
Composite quality — 41.3/100 · thin
Contract Quality 15.5 / 25
Developer Ergonomics 3.9 / 20
Commercial Clarity 7.9 / 20
Operational Transparency 4.8 / 13
Governance 0.0 / 12
Discoverability 9.3 / 10
Agent readiness — 48/100 · agent ready
Machine-Readable Contract 18 / 18
Agentic Access Contract 15 / 15
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 7 / 7
Typed Event Surface 0 / 6
Agent Skills 0 / 5
Well-Known Catalog 0 / 4
Consent & Bot Identity 0 / 3
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/numlookupapi: 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 2

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

NumLookupAPI Account API

Account quota and usage status.

NumLookupAPI Validation API

Phone number validation and lookup.

Open Collections 1

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

NumLookupAPI

OPEN COLLECTION

Pricing Plans 1

Published pricing tiers and plan structures.

Numlookupapi Plans Pricing

5 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Numlookupapi Rate Limits

6 limits

RATE LIMITS

FinOps 1

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

Numlookupapi Finops

FINOPS

Security Posture 2

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

Numlookupapi Authentication

apiKey · 2 schemes

SECURITY

Numlookupapi Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Agentic Access 1

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

Numlookupapi Agentic Access

2 operations

2 operations · 0 acting

AGENTIC

Resources

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

GitHubOrganization
GitHubOrganization

Access & Security 2

Authentication, authorization, and security posture

Authentication
Authentication
 DomainSecurity
DomainSecurity

Operate 1

Status, limits, changes, and where to get help

RateLimits
RateLimits

Commercial 2

Pricing, plans, and the legal terms of use

Plans
Plans
 FinOps
FinOps

Company 2

The organization behind the API

LinkedIn
LinkedIn
 Website
Website

Source (apis.yml)

apis.yml Raw ↑ 
aid: numlookupapi
url: https://raw.githubusercontent.com/api-evangelist/numlookupapi/refs/heads/main/apis.yml
name: NumLookupAPI
kind: company
description: NumLookupAPI is a phone number validation and lookup REST API from everapi. A single GET request validates a
  phone number and returns whether it is valid along with its local and international formats, country prefix, ISO country
  code and name, geographic location, carrier, and line type (mobile, landline, etc.). It offers a free tier of 100 requests
  per month, is authenticated with a simple API key, and is used for phone verification, data validation, and caller identity
  enrichment.
accessModel:
  pricing: freemium
  onboarding: self-serve
  trial: false
  try_now: true
  public: false
  label: Freemium · Self-serve signup
  confidence: high
  source:
  - plans
  - authentication
  generated: '2026-07-22'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/numlookupapi.png
tags:
- Number Verification
- Phone Validation
- Phone Number Lookup
- Carrier Lookup
- Line Type
- Verification
- Data Validation
- Caller Identity
created: '2026-07-12'
modified: '2026-07-12'
specificationVersion: '0.19'
apis:
- aid: numlookupapi:numlookupapi-account-api
  name: NumLookupAPI Account API
  description: Account quota and usage status.
  humanURL: https://numlookupapi.com/docs/validate
  baseURL: https://api.numlookupapi.com/v1
  tags:
  - Account
  properties:
  - type: OpenAPI
    url: openapi/numlookupapi-account-api-openapi.yml
  - type: Documentation
    url: https://numlookupapi.com/docs
  - type: APIReference
    url: https://numlookupapi.com/docs/validate
  - type: PostmanCollection
    url: collections/numlookupapi.postman_collection.json
  - type: OpenCollection
    url: collections/numlookupapi.opencollection.json
  - type: APIReference
    url: https://numlookupapi.com/docs/status
- aid: numlookupapi:numlookupapi-validation-api
  name: NumLookupAPI Validation API
  description: Phone number validation and lookup.
  humanURL: https://numlookupapi.com/docs/validate
  baseURL: https://api.numlookupapi.com/v1
  tags:
  - Validation
  properties:
  - type: OpenAPI
    url: openapi/numlookupapi-validation-api-openapi.yml
  - type: Documentation
    url: https://numlookupapi.com/docs
  - type: APIReference
    url: https://numlookupapi.com/docs/validate
  - type: PostmanCollection
    url: collections/numlookupapi.postman_collection.json
  - type: OpenCollection
    url: collections/numlookupapi.opencollection.json
  - type: APIReference
    url: https://numlookupapi.com/docs/status
common:
- type: AgenticAccess
  url: agentic-access/numlookupapi-agentic-access.yml
- type: Authentication
  url: authentication/numlookupapi-authentication.yml
- type: DomainSecurity
  url: security/numlookupapi-domain-security.yml
- type: GitHubOrganization
  url: https://github.com/everapihq
- type: LinkedIn
  url: https://www.linkedin.com/company/everapi
- type: Website
  url: https://numlookupapi.com
- type: Documentation
  url: https://numlookupapi.com/docs
- type: Plans
  url: plans/numlookupapi-plans-pricing.yml
- type: RateLimits
  url: rate-limits/numlookupapi-rate-limits.yml
- type: FinOps
  url: finops/numlookupapi-finops.yml
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com