# NumLookupAPI

**Canonical:** https://apis.io/providers/numlookupapi/  
**Website:** https://numlookupapi.com  
**APIs profiled:** 2

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.

## Kin Score — 36.1 / 100 (thin)

Scored 2026-08-21 under rubric 0.12.0. Trend: flat (+0.0 from 36.1).

| Facet | Score |
|---|---|
| Discoverability | 68.5 |
| Contract Quality | 58.0 |
| Governance | 0.0 |
| Contract Governance | 0.0 |
| Operational Transparency | 34.2 |
| Developer Ergonomics | 21.4 |
| Commercial Clarity | 39.5 |
| Access Clarity | 39.5 |

Regulatory layer — **Telecommunications**: 16.7 (matched via tags).

## Agent readiness — 41.8 (agent-ready)

| Dimension | Value |
|---|---|
| Spec Presence | yes |
| Agentic Access | derived |
| Reversibility Documented | na |
| MCP Server | no |
| Auth Clarity | yes |
| Idempotency | na |
| Error Semantics | no |
| OpenAPI Examples | verified |
| Rate Limit Signal | documented |
| Event Surface Described | no |
| Agent Skills | no |
| Well Known Catalog | no |
| Consent Identity | no |
| Agent Card | no |
| Dry Run Mode | na |

## Access

Freemium · Self-serve signup — onboarding: self-serve, pricing: freemium, trial: no (confidence: high).

## APIs (2)

- **NumLookupAPI Account API** — Account quota and usage status.
- **NumLookupAPI Validation API** — Phone number validation and lookup.

## Agentic access (1)

- **Numlookupapi Agentic Access** — 2 operations

## Security (2)

- **Numlookupapi Authentication** — apiKey · 2 schemes
- **Numlookupapi Domain Security** — TLSv1.3 · HSTS · DMARC

## Plans (1)

- **Numlookupapi Plans Pricing**

## Tags

Number Verification, Phone Validation, Phone Number Lookup, Carrier Lookup, Line Type, Verification, Data Validation, Caller Identity

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/providers/numlookupapi/). Scores are computed from the provider's own public artifacts under a published rubric.