Api Endpoint

wtsp.dev

Whether a number has a WhatsApp account, and nothing else: the cheapest way to clean a list before paying for profiles. /v1/profile gives the same answer plus the account's details. Query param: phone, with country code (e.g. +14155552671). Every answer is charged, “not on WhatsApp” included; a lookup WhatsApp does not answer is free.

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Offering

Provider: wtsp.dev
Method: GET
Offering type: Api Endpoint
Transport type: http
Category: Business And Commerce
Delivery: Not provided
Pricing model: Not provided
x402 version: 2

Endpoint context

URL: https://wtsp.dev/v1/exists
MIME type: application/json
First seen: 2026-10-16T01:50:24.663Z
Last seen: 2026-11-02T06:21:27.543Z
Tags: whatsapp, phone-lookup, Validation, Verification, registration

Website

Payment pricing

x402 payment terms are the authoritative price for calling this endpoint.

Payment option 1: 0.004 USDC
Atomic price: 4000 · Network: eip155:8453 · Asset: USDC · Scheme: exact

Raw x402 terms

[
  {
    "scheme": "exact",
    "network": "eip155:8453",
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "amount": "4000",
    "payTo": "0x539d036a305F78388dcA5FC49c27f9e29b83D315"
  }
]

Observed health

Status: Healthy
Latest latency: 122 ms
Average latency: 414 ms
HTTP status: 402
Last checked: 2026-11-02T06:21:27.539Z
Reachability: 100% over 14 checks

Latency is measured to the first response headers. A reachable result does not verify response accuracy or merchant identity.

Input schema

{
  "type": "object",
  "properties": {
    "type": {
      "type": "string",
      "const": "http"
    },
    "method": {
      "type": "string",
      "enum": [
        "GET"
      ]
    },
    "queryParams": {
      "type": "object",
      "properties": {
        "phone": {
          "type": "string",
          "description": "Phone number with its country code, e.g. +14155552671. The + is optional; spaces, dashes and a leading 00 are fine."
        }
      },
      "required": [
        "phone"
      ]
    }
  },
  "required": [
    "type",
    "method"
  ],
  "additionalProperties": false
}

Output schema

{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "properties": {
    "input": {
      "additionalProperties": false,
      "properties": {
        "method": {
          "enum": [
            "GET"
          ],
          "type": "string"
        },
        "queryParams": {
          "properties": {
            "phone": {
              "description": "Phone number with its country code, e.g. +14155552671. The + is optional; spaces, dashes and a leading 00 are fine.",
              "type": "string"
            }
          },
          "required": [
            "phone"
          ],
          "type": "object"
        },
        "type": {
          "const": "http",
          "type": "string"
        }
      },
      "required": [
        "type",
        "method"
      ],
      "type": "object"
    },
    "output": {
      "properties": {
        "example": {
          "properties": {
            "checkedAt": {
              "description": "When this answer was fetched from WhatsApp (ISO 8601).",
              "type": "string"
            },
            "hasWhatsApp": {
              "description": "Whether the number is a registered WhatsApp account. `false` is a definitive answer, not a failure.",
              "type": "boolean"
            },
            "phone": {
              "description": "The number looked up, in E.164.",
              "type": "string"
            }
          },
          "required": [
            "phone",
            "hasWhatsApp",
            "checkedAt"
          ],
          "type": "object"
        },
        "type": {
          "type": "string"
        }
      },
      "required": [
        "type"
      ],
      "type": "object"
    }
  },
  "required": [
    "input"
  ],
  "type": "object"
}