generated: '2026-09-16'
method: searched
source: >-
  numverify.com homepage example and the APILayer marketplace page for
  number_verification. No OpenAPI is published (docs gated), so this profile is
  hand-derived from the public request examples and confirmed against live
  probes.
summary: >-
  Single API-key credential, no OAuth. The key is obtained from a free APILayer
  account. Two transports depending on base URL.
schemes:
- id: access_key_query
  type: apiKey
  in: query
  name: access_key
  base: https://apilayer.net/api
  example: 'https://apilayer.net/api/validate?access_key=YOUR_KEY&number=14158586273'
  evidence: 'Probed 2026-09-16; missing key -> code 101 missing_access_key'
- id: apikey_header
  type: apiKey
  in: header
  name: apikey
  base: https://api.apilayer.com/number_verification
  example: "curl 'https://api.apilayer.com/number_verification/validate?number=14158586273' --header 'apikey: YOUR_KEY'"
  evidence: 'Probed 2026-09-16; missing header -> HTTP 401 {"message":"No API key found in request"}'
oauth2: false
mutual_tls: false
notes: >-
  Key acquisition is self-serve at https://numverify.com/signup (free tier, 100
  requests/month). The same APILayer account key works across the APILayer
  marketplace suite on the api.apilayer.com host.