nuclei-templates/file/keys/facebook-client-id.yaml

id: facebook-client-id

info:
  name: Facebook Client ID
  author: gaurang
  severity: info
  tags: keys,file

file:
  - extensions:
      - all
      - txt

    extractors:
      - type: regex
        regex:
          - "(?i)(facebook|fb)(.{0,20})?['\"][0-9]{13,17}['\"]"