Mask values keep-last API

Masks string values at the listed paths, keeping the last N characters visible (e.g. card numbers, emails) with a configurable mask char. Answers 'How do I mask a card/SSN keeping the last 4?', 'How do I partially redact values for display?'.

Price$0.02per request

MethodPOST

Route/v1/data-transform/mask-values

StatusLive

MIME typeapplication/json

Rate limit120/minute

Cache0s public

data-transformmaskredactpiiprivacylast4jsonwrangle

API URLhttps://x402.hexl.dev/v1/data-transform/mask-values

Integration docs

Example request

{
  "object": {
    "card": "4111111111111234"
  },
  "paths": [
    "card"
  ],
  "keepLast": 4
}

Example response

{
  "result": {
    "card": "************1234"
  },
  "masked": [
    "card"
  ]
}

Input schema

{
  "type": "object",
  "required": [
    "object",
    "paths"
  ],
  "properties": {
    "object": {
      "type": "object",
      "examples": [
        {
          "card": "4111111111111234"
        }
      ]
    },
    "paths": {
      "type": "array",
      "examples": [
        [
          "card"
        ]
      ]
    },
    "keepLast": {
      "type": "number",
      "examples": [
        4
      ]
    }
  }
}

Output schema

{
  "type": "object",
  "additionalProperties": true
}