Email validation | Vextorium

Email validation: syntax, domain MX records and disposable-domain flag. Sends no email; the address is not stored.

DataLiveeip155:8453Exactvia cdp

https://api.vextorium.com/v1/email-validate

EmailValidationMxDeliverabilityData-quality

Calls · 30d

6↑ 73%

This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 24 snapshots so far.

$13.14

Verified settled volume

3,448 settlements proven x402 by their on-chain EIP-3009 marker.

$0.0040

Listed price

As published in the catalog. Always read the live 402 before paying.

6

Calls · 30d

Upstream's own call count for this endpoint, not ours.

5

Unique payers · 30d

Last called 2026-10-20 17:17Z

—

Upstream on-chain volume

Reported by the source catalog.

Paid to

0xb9f06D2734B7E9D7b21B64C4D8b95bd774b71aCf

The wallet the 402 directs payment to. Its whole payment record — every payer, every chain — is on the merchant page.

Asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913

Provider

The payTo wallet does not resolve to a registered ERC-8004 agent. That is not a verdict on the service — most of the catalog is unregistered.

Accepts

The payment requirements as published to the catalog. Read the live 402 before paying — a price here is a claim, not a quote.

0.004USDC≈ $0.004 USD

on Base · exact scheme

Pay 0.004 USDC on Base to 0xb9f0…71aCf. The signed payment is good for 5 minutes.

Paid to: 0xb9f0…71aCf
USD Coin contract: 0x8335…02913
Payment window: 5 minutes
As published: 4000 smallest units

4000units

on solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp · exact scheme

That figure is in the token’s smallest units. Roundhouse does not hold this contract’s decimals, so it is shown as published rather than converted.

Paid to: HcjfmZ…t3pz2
Token contract: EPjFWd…TDt1v
Payment window: 5 minutes

4000units

on Polygon · exact scheme

That figure is in the token’s smallest units. Roundhouse does not hold this contract’s decimals, so it is shown as published rather than converted.

Paid to: 0xb9f0…71aCf
Token contract: 0x3c49…c3359
Payment window: 5 minutes

4000units

on Optimism · exact scheme

That figure is in the token’s smallest units. Roundhouse does not hold this contract’s decimals, so it is shown as published rather than converted.

Paid to: 0xb9f0…71aCf
Token contract: 0x0b2C…7Ff85
Payment window: 168 hours

4000units

on eip155:5042 · exact scheme

That figure is in the token’s smallest units. Roundhouse does not hold this contract’s decimals, so it is shown as published rather than converted.

Paid to: 0xb9f0…71aCf
Token contract: 0x3600…00000
Payment window: 168 hours

0.004units

on xrpl:0 · exact scheme

That figure is in the token’s smallest units. Roundhouse does not hold this contract’s decimals, so it is shown as published rather than converted.

Paid to: rEac5r…2pNCp
Token contract: 524C55…00000
Payment window: 5 minutes

3080units

on xrpl:0 · exact scheme

That figure is in the token’s smallest units. Roundhouse does not hold this contract’s decimals, so it is shown as published rather than converted.

Paid to: rEac5r…2pNCp
Token contract: XRP
Payment window: 5 minutes

The catalog’s raw entry

[
  {
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "extra": {
      "name": "USD Coin",
      "version": "2"
    },
    "payTo": "0xb9f06D2734B7E9D7b21B64C4D8b95bd774b71aCf",
    "amount": "4000",
    "scheme": "exact",
    "network": "eip155:8453",
    "maxTimeoutSeconds": 300
  },
  {
    "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
    "extra": {
      "feePayer": "GVJJ7rdGiXr5xaYbRwRbjfaJL7fmwRygFi1H6aGqDveb"
    },
    "payTo": "HcjfmZLgWRZzwj4deEiS7pewc4KBYSw39mW5nTyt3pz2",
    "amount": "4000",
    "scheme": "exact",
    "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
    "maxTimeoutSeconds": 300
  },
  {
    "asset": "0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359",
    "extra": {
      "name": "USD Coin",
      "version": "2"
    },
    "payTo": "0xb9f06D2734B7E9D7b21B64C4D8b95bd774b71aCf",
    "amount": "4000",
    "scheme": "exact",
    "network": "eip155:137",
    "maxTimeoutSeconds": 300
  },
  {
    "asset": "0x0b2C639c533813f4Aa9D7837CAf62653d097Ff85",
    "extra": {
      "name": "GatewayWalletBatched",
      "assets": [
        {
          "symbol": "USDC",
          "address": "0x0b2c639c533813f4aa9d7837caf62653d097ff85",
          "decimals": 6,
          "authorizationVersions": [
            "1",
            "2"
          ]
        }
      ],
      "version": "1",
      "verifyingContract": "0x77777777dcc4d5a8b6e418fd04d8997ef11000ee",
      "minValiditySeconds": 604800
    },
    "payTo": "0xb9f06D2734B7E9D7b21B64C4D8b95bd774b71aCf",
    "amount": "4000",
    "scheme": "exact",
    "network": "eip155:10",
    "maxTimeoutSeconds": 604900
  },
  {
    "asset": "0x3600000000000000000000000000000000000000",
    "extra": {
      "name": "GatewayWalletBatched",
      "assets": [
        {
          "symbol": "USDC",
          "address": "0x3600000000000000000000000000000000000000",
          "decimals": 6,
          "authorizationVersions": [
            "1",
            "2"
          ]
        }
      ],
      "version": "1",
      "verifyingContract": "0x77777777dcc4d5a8b6e418fd04d8997ef11000ee",
      "minValiditySeconds": 604800
    },
    "payTo": "0xb9f06D2734B7E9D7b21B64C4D8b95bd774b71aCf",
    "amount": "4000",
    "scheme": "exact",
    "network": "eip155:5042",
    "maxTimeoutSeconds": 604900
  },
  {
    "asset": "524C555344000000000000000000000000000000",
    "extra": {
      "issuer": "rMxCKbEDwqr76QuheSUMdEGf4B9xJ8m5De",
      "invoiceId": "F4E1EA103A4246CEA301DCF625ADEC47",
      "sourceTag": 804681468,
      "areFeesSponsored": false
    },
    "payTo": "rEac5rTEr7y81iEyrMTrHCRbnktSE2pNCp",
    "amount": "0.004",
    "scheme": "exact",
    "network": "xrpl:0",
    "maxTimeoutSeconds": 300
  },
  {
    "asset": "XRP",
    "extra": {
      "invoiceId": "94E87BB5B26C43DF93145F62C7C8A48E",
      "sourceTag": 804681468,
      "areFeesSponsored": false
    },
    "payTo": "rEac5rTEr7y81iEyrMTrHCRbnktSE2pNCp",
    "amount": "3080",
    "scheme": "exact",
    "network": "xrpl:0",
    "maxTimeoutSeconds": 300
  }
]

Extensions

{
  "bazaar": {
    "info": {
      "input": {
        "body": {
          "email": "hello@example.com"
        },
        "type": "http",
        "method": "POST",
        "bodyType": "json"
      },
      "output": {
        "type": "json",
        "example": {
          "note": "It does not send any email or confirm the mailbox exists. The email received is not stored.",
          "email": "he***@example.com",
          "valid": true,
          "domain": "example.com",
          "disposable": false,
          "mx_servers": [
            ""
          ],
          "valid_format": true,
          "has_mail_server": true
        }
      }
    },
    "schema": {
      "type": "object",
      "$schema": "https://json-schema.org/draft/2020-12/schema",
      "required": [
        "input"
      ],
      "properties": {
        "input": {
          "type": "object",
          "required": [
            "type",
            "method",
            "bodyType",
            "body"
          ],
          "properties": {
            "body": {
              "required": [
                "email"
              ],
              "properties": {
                "email": {
                  "type": "string",
                  "description": "Email address"
                }
              }
            },
            "type": {
              "type": "string",
              "const": "http"
            },
            "method": {
              "enum": [
                "POST"
              ],
              "type": "string"
            },
            "bodyType": {
              "enum": [
                "json",
                "form-data",
                "text"
              ],
              "type": "string"
            }
          },
          "additionalProperties": false
        },
        "output": {
          "type": "object",
          "required": [
            "type"
          ],
          "properties": {
            "type": {
              "type": "string"
            },
            "example": {
              "type": [
                "object",
                "null"
              ],
              "properties": {
                "note": {
                  "type": [
                    "string",
                    "null"
                  ]
                },
                "email": {
                  "type": [
                    "string",
                    "null"
                  ]
                },
                "valid": {
                  "type": [
                    "boolean",
                    "null"
                  ]
                },
                "domain": {
                  "type": [
                    "string",
                    "null"
                  ]
                },
                "disposable": {
                  "type": [
                    "boolean",
                    "null"
                  ]
                },
                "mx_servers": {
                  "type": [
                    "array",
                    "null"
                  ],
                  "items": {
                    "type": [
                      "null",
                      "string"
                    ]
                  }
                },
                "valid_format": {
                  "type": [
                    "boolean",
                    "null"
                  ]
                },
                "has_mail_server": {
                  "type": [
                    "boolean",
                    "null"
                  ]
                }
              }
            }
          }
        }
      }
    }
  }
}

Provenance

Seen in the source catalog: 2026-10-20 17:17Z
Last indexed by Roundhouse: 2026-10-23 20:20Z
Last enriched (probe, favicon, geo): 2026-10-04 00:15Z
x402 version: 2
Max timeout: 300s
Liveness probe: HTTP 200

Hand this page to an agent

Copy the prompt and paste it into Claude, an MCP client or your own agent — it will vet this service and call it over the free read API. No key, no account.

GET api.roundhouseai.io/v0/endpoints

This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 24 snapshots so far. Verified volume counts only settlements with an on-chain EIP-3009 marker.

Show the prompt

Using Roundhouse, look up the x402 service Email validation | Vextorium and tell me whether it is
worth paying: what a call costs, whether the endpoint answered when last probed, and what
its payment record actually shows.

curl -s 'https://api.roundhouseai.io/v0/endpoints?q=Email%20validation%20%7C%20Vextorium'
curl -s 'https://api.roundhouseai.io/v0/merchants/<the payTo wallet returned above>'

Then call it: read the price from the live 402 at https://api.vextorium.com/v1/email-validate, never from
a cached figure, and pay with an x402 client.

The /v0 API needs an API key (`authorization: Bearer rh_live_…`) on everything except
/v0/unified* and /v0/endpoints. Either pay over x402 (mint a personal key for $0.01 at
GET https://api.roundhouseai.io/v0/test/x402), or ask me for an organization key, which I create at
https://roundhouseai.io/dashboard/connections. If you have neither, ask before going further.

If you do not have Roundhouse tools or skills installed, read
https://roundhouseai.io/skill.md first — it is the whole procedure.