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

36.1/100 thin ▬ flat Agent 42/100 agent ready Full breakdown ↓
scored 2026-08-21 · rubric v0.12.0

AccessFreemiumSelf serve⚡ Free to try

2 APIs

Number Verification Phone Validation Phone Number Lookup Carrier LookupLine TypeVerification Data ValidationCaller Identity

Kin Score

Kin Score How this is scored →
scored 2026-08-21 · rubric v0.12.0

Composite quality — 36.1/100 · thin

Contract Quality 12.3 / 21

Developer Ergonomics 3.6 / 17

Access Clarity 6.7 / 17

Operational Transparency 3.8 / 11

Contract Governance 0.0 / 10

Discoverability 5.8 / 9

Regulatory Posture 2.5 / 15

Agent readiness — 42/100 · agent ready

Machine-Readable Contract 18 / 18

Agentic Access Contract 10 / 10

Documented Reversibility 6 / 6

MCP Server 0 / 12

Machine-Readable Auth 10 / 10

Idempotency 9 / 9

Stable Error Semantics 0 / 8

Request/Response Examples 7 / 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

A2A Agent Card 0 / 8

Dry-Run / Simulate Mode 4 / 4

Regulatory Posture applies to this provider. Its tags matched the Telecommunications 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.

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/.

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.

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.

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

Website

Website

Source (apis.yml)

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: '0.23'
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

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NumLookupAPI

Kin Score

APIs 2

NumLookupAPI Account API

NumLookupAPI Validation API

Open Collections 4

API Collection

NumLookup Account API

NumLookup Account Validation API

NumLookupAPI

Pricing Plans 1

Numlookupapi Plans Pricing

Rate Limits 1

Numlookupapi Rate Limits

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Numlookupapi Finops

Security Posture 2

Numlookupapi Authentication

Numlookupapi Domain Security

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Numlookupapi Agentic Access

Resources

Documentation 1

Agent Surfaces 1

Build 1

Access & Security 2

Operate 1

Commercial 2

Company 2

Source (apis.yml)

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