FETCH402
← Protocol index

Resource / 259

healthy

DNS & WHOIS Domain Lookup.

GET https://dns.use.x402atlas.com/mx ↗

DNS MX record lookup — a domain's mail servers with their hostnames and priorities as structured JSON, for email routing, deliverability diagnostics and mail-provider detection.

Eligibility
probeable
Failures
0
Last quote
2026-08-12 22:00:02 UTC
Last probe
2026-08-12 22:00:02 UTC
Payment requirements / accepts[] 4 options
State Network Scheme Atomic amount Asset payTo / untrusted
active eip155:8453 exact 5000 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 0x446e51DeAb3aE656C99E65369e8eF1148d23d7f7
active eip155:137 exact 5000 0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359 0x446e51DeAb3aE656C99E65369e8eF1148d23d7f7
active eip155:42161 exact 5000 0xaf88d065e77c8cC2239327C5EDb3A432268e5831 0x446e51DeAb3aE656C99E65369e8eF1148d23d7f7
active solana:5eykt4usfv8p8njdtrepy1vzqkqzkvdp exact 5000 EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v ASt6xvRyQ7ntERsmcYVMdLqZvz1GEN8Fzexzq62tXrNQ

All advertised payment options are stored. Base (`eip155:8453`) is the operational network for ranking and canaries; non-Base options remain visible for transparency.

Probe evidence 1 recent
healthy 2026-08-12 22:00:02 UTC GET · HTTP 402 · 4ms · accepts 4 · base 1 ok
Request
GET https://dns.use.x402atlas.com/mx
Robots
error
Note
robots_error:{:robots_http_status, 404};http_402;accepts=4;base=1
Accepts fingerprint
470a23edf44b594f5a96f91b007ca858483d7164777ffd6a28fa57ec826550ca

Accepts snapshot

[
  {
    "amount": "5000",
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "assetTransferMethod": null,
    "extra": {
      "merchant": "x402Atlas",
      "name": "USD Coin",
      "tier": "standard",
      "version": "2"
    },
    "maxTimeoutSeconds": 300,
    "network": "eip155:8453",
    "payTo": "0x446e51DeAb3aE656C99E65369e8eF1148d23d7f7",
    "paymentFlow": null,
    "raw": {
      "amount": "5000",
      "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
      "extra": {
        "merchant": "x402Atlas",
        "name": "USD Coin",
        "tier": "standard",
        "version": "2"
      },
      "maxTimeoutSeconds": 300,
      "max_timeout_seconds": 300,
      "network": "eip155:8453",
      "payTo": "0x446e51DeAb3aE656C99E65369e8eF1148d23d7f7",
      "pay_to": "0x446e51DeAb3aE656C99E65369e8eF1148d23d7f7",
      "scheme": "exact"
    },
    "scheme": "exact"
  },
  {
    "amount": "5000",
    "asset": "0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359",
    "assetTransferMethod": null,
    "extra": {
      "merchant": "x402Atlas",
      "name": "USD Coin",
      "tier": "standard",
      "version": "2"
    },
    "maxTimeoutSeconds": 300,
    "network": "eip155:137",
    "payTo": "0x446e51DeAb3aE656C99E65369e8eF1148d23d7f7",
    "paymentFlow": null,
    "raw": {
      "amount": "5000",
      "asset": "0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359",
      "extra": {
        "merchant": "x402Atlas",
        "name": "USD Coin",
        "tier": "standard",
        "version": "2"
      },
      "maxTimeoutSeconds": 300,
      "max_timeout_seconds": 300,
      "network": "eip155:137",
      "payTo": "0x446e51DeAb3aE656C99E65369e8eF1148d23d7f7",
      "pay_to": "0x446e51DeAb3aE656C99E65369e8eF1148d23d7f7",
      "scheme": "exact"
    },
    "scheme": "exact"
  },
  {
    "amount": "5000",
    "asset": "0xaf88d065e77c8cC2239327C5EDb3A432268e5831",
    "assetTransferMethod": null,
    "extra": {
      "merchant": "x402Atlas",
      "name": "USD Coin",
      "tier": "standard",
      "version": "2"
    },
    "maxTimeoutSeconds": 300,
    "network": "eip155:42161",
    "payTo": "0x446e51DeAb3aE656C99E65369e8eF1148d23d7f7",
    "paymentFlow": null,
    "raw": {
      "amount": "5000",
      "asset": "0xaf88d065e77c8cC2239327C5EDb3A432268e5831",
      "extra": {
        "merchant": "x402Atlas",
        "name": "USD Coin",
        "tier": "standard",
        "version": "2"
      },
      "maxTimeoutSeconds": 300,
      "max_timeout_seconds": 300,
      "network": "eip155:42161",
      "payTo": "0x446e51DeAb3aE656C99E65369e8eF1148d23d7f7",
      "pay_to": "0x446e51DeAb3aE656C99E65369e8eF1148d23d7f7",
      "scheme": "exact"
    },
    "scheme": "exact"
  },
  {
    "amount": "5000",
    "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
    "assetTransferMethod": null,
    "extra": {
      "feePayer": "GVJJ7rdGiXr5xaYbRwRbjfaJL7fmwRygFi1H6aGqDveb",
      "merchant": "x402Atlas",
      "tier": "standard"
    },
    "maxTimeoutSeconds": 300,
    "network": "solana:5eykt4usfv8p8njdtrepy1vzqkqzkvdp",
    "payTo": "ASt6xvRyQ7ntERsmcYVMdLqZvz1GEN8Fzexzq62tXrNQ",
    "paymentFlow": null,
    "raw": {
      "amount": "5000",
      "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
      "extra": {
        "feePayer": "GVJJ7rdGiXr5xaYbRwRbjfaJL7fmwRygFi1H6aGqDveb",
        "merchant": "x402Atlas",
        "tier": "standard"
      },
      "maxTimeoutSeconds": 300,
      "max_timeout_seconds": 300,
      "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
      "payTo": "ASt6xvRyQ7ntERsmcYVMdLqZvz1GEN8Fzexzq62tXrNQ",
      "pay_to": "ASt6xvRyQ7ntERsmcYVMdLqZvz1GEN8Fzexzq62tXrNQ",
      "scheme": "exact"
    },
    "scheme": "exact"
  }
]

PaymentRequired raw 

{
  "accepts": [
    {
      "amount": "5000",
      "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
      "extra": {
        "merchant": "x402Atlas",
        "name": "USD Coin",
        "tier": "standard",
        "version": "2"
      },
      "maxTimeoutSeconds": 300,
      "network": "eip155:8453",
      "payTo": "0x446e51DeAb3aE656C99E65369e8eF1148d23d7f7",
      "scheme": "exact"
    },
    {
      "amount": "5000",
      "asset": "0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359",
      "extra": {
        "merchant": "x402Atlas",
        "name": "USD Coin",
        "tier": "standard",
        "version": "2"
      },
      "maxTimeoutSeconds": 300,
      "network": "eip155:137",
      "payTo": "0x446e51DeAb3aE656C99E65369e8eF1148d23d7f7",
      "scheme": "exact"
    },
    {
      "amount": "5000",
      "asset": "0xaf88d065e77c8cC2239327C5EDb3A432268e5831",
      "extra": {
        "merchant": "x402Atlas",
        "name": "USD Coin",
        "tier": "standard",
        "version": "2"
      },
      "maxTimeoutSeconds": 300,
      "network": "eip155:42161",
      "payTo": "0x446e51DeAb3aE656C99E65369e8eF1148d23d7f7",
      "scheme": "exact"
    },
    {
      "amount": "5000",
      "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
      "extra": {
        "feePayer": "GVJJ7rdGiXr5xaYbRwRbjfaJL7fmwRygFi1H6aGqDveb",
        "merchant": "x402Atlas",
        "tier": "standard"
      },
      "maxTimeoutSeconds": 300,
      "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
      "payTo": "ASt6xvRyQ7ntERsmcYVMdLqZvz1GEN8Fzexzq62tXrNQ",
      "scheme": "exact"
    }
  ],
  "error": "Payment required",
  "extensions": {
    "bazaar": {
      "category": "domain-intelligence",
      "info": {
        "input": {
          "method": "GET",
          "queryParams": {
            "host": "example.com"
          },
          "type": "http"
        },
        "output": {
          "example": {
            "host": "example.com",
            "queried_at": "2026-06-05T12:00:00Z",
            "records": [
              {
                "host": "mail.example.com.",
                "pref": 10
              }
            ]
          },
          "type": "json"
        }
      },
      "schema": {
        "$schema": "https://json-schema.org/draft/2020-12/schema",
        "properties": {
          "input": {
            "additionalProperties": false,
            "properties": {
              "method": {
                "enum": [
                  "GET"
                ],
                "type": "string"
              },
              "queryParams": {
                "properties": {
                  "host": {
                    "description": "Bare hostname to resolve (not an IP literal, not localhost, not under a reserved suffix like .local/.internal)",
                    "maxLength": 253,
                    "minLength": 1,
                    "type": "string"
                  }
                },
                "required": [
                  "host"
                ],
                "type": "object"
              },
              "type": {
                "const": "http",
                "type": "string"
              }
            },
            "required": [
              "type",
              "method"
            ],
            "type": "object"
          },
          "output": {
            "properties": {
              "example": {
                "properties": {
                  "host": {
                    "description": "The queried hostname",
                    "type": "string"
                  },
                  "queried_at": {
                    "description": "UTC timestamp of the lookup",
                    "format": "date-time",
                    "type": "string"
                  },
                  "records": {
                    "items": {
                      "properties": {
                        "host": {
                          "description": "Mail server hostname, typically with a trailing dot",
                          "type": "string"
                        },
                        "pref": {
                          "description": "MX preference; lower values are tried first",
                          "type": "integer"
                        }
                      },
                      "required": [
                        "host",
                        "pref"
                      ],
                      "type": "object"
                    },
                    "type": "array"
                  }
                },
                "required": [
                  "host",
                  "records",
                  "queried_at"
                ],
                "type": "object"
              },
              "type": {
                "type": "string"
              }
            },
            "required": [
              "type"
            ],
            "type": "object"
          }
        },
        "required": [
          "input"
        ],
        "type": "object"
      },
      "tags": [
        "dns",
        "mx",
        "mail-server",
        "email",
        "deliverability",
        "domain",
        "lookup"
      ]
    }
  },
  "resource": {
    "description": "DNS MX record lookup — a domain's mail servers with their hostnames and priorities as structured JSON, for email routing, deliverability diagnostics and mail-provider detection.",
    "mimeType": "application/json",
    "serviceName": "DNS & WHOIS Domain Lookup",
    "tags": [
      "dns",
      "mx",
      "mail-server",
      "email",
      "deliverability",
      "domain",
      "lookup"
    ],
    "url": "https://dns.use.x402atlas.com/mx"
  },
  "x402Version": 2
}

Response headers

{
  "alt-svc": "h3=\":443\"; ma=2592000",
  "content-length": "2035",
  "content-type": "application/json",
  "date": "Wed, 12 Aug 2026 22:00:02 GMT",
  "payment-required": "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",
  "via": "1.1 Caddy",
  "x-request-id": "7f77c97b-7172-4256-9e82-8c52d1145083"
}

Response body 

{
  "accepts": [
    {
      "amount": "5000",
      "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
      "extra": {
        "merchant": "x402Atlas",
        "name": "USD Coin",
        "tier": "standard",
        "version": "2"
      },
      "maxTimeoutSeconds": 300,
      "network": "eip155:8453",
      "payTo": "0x446e51DeAb3aE656C99E65369e8eF1148d23d7f7",
      "scheme": "exact"
    },
    {
      "amount": "5000",
      "asset": "0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359",
      "extra": {
        "merchant": "x402Atlas",
        "name": "USD Coin",
        "tier": "standard",
        "version": "2"
      },
      "maxTimeoutSeconds": 300,
      "network": "eip155:137",
      "payTo": "0x446e51DeAb3aE656C99E65369e8eF1148d23d7f7",
      "scheme": "exact"
    },
    {
      "amount": "5000",
      "asset": "0xaf88d065e77c8cC2239327C5EDb3A432268e5831",
      "extra": {
        "merchant": "x402Atlas",
        "name": "USD Coin",
        "tier": "standard",
        "version": "2"
      },
      "maxTimeoutSeconds": 300,
      "network": "eip155:42161",
      "payTo": "0x446e51DeAb3aE656C99E65369e8eF1148d23d7f7",
      "scheme": "exact"
    },
    {
      "amount": "5000",
      "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
      "extra": {
        "feePayer": "GVJJ7rdGiXr5xaYbRwRbjfaJL7fmwRygFi1H6aGqDveb",
        "merchant": "x402Atlas",
        "tier": "standard"
      },
      "maxTimeoutSeconds": 300,
      "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
      "payTo": "ASt6xvRyQ7ntERsmcYVMdLqZvz1GEN8Fzexzq62tXrNQ",
      "scheme": "exact"
    }
  ],
  "contact": {
    "email": "support@x402atlas.com"
  },
  "documentation": "https://dns.use.x402atlas.com/docs",
  "error": "payment_required",
  "hint": "This endpoint requires x402 payment. The price and payment options are in the PAYMENT-REQUIRED response header (x402 v2). Pay with an x402 client, then retry to receive the data.",
  "llms": "https://dns.use.x402atlas.com/llms.txt",
  "method": "GET",
  "openapi": "https://dns.use.x402atlas.com/openapi.json",
  "price": "$0.005 per call",
  "resource": {
    "description": "DNS MX record lookup — a domain's mail servers with their hostnames and priorities as structured JSON, for email routing, deliverability diagnostics and mail-provider detection.",
    "mimeType": "application/json",
    "serviceName": "DNS & WHOIS Domain Lookup",
    "tags": [
      "dns",
      "mx",
      "mail-server",
      "email",
      "deliverability",
      "domain",
      "lookup"
    ],
    "url": "https://dns.use.x402atlas.com/mx"
  },
  "x402Version": 2
}

Request headers

{
  "accept": "*/*",
  "user-agent": "Fetch402Bot/0.1 (+https://fetch402.com/crawler; contact: crawler@fetch402.com)"
}

Machine contract

Schemas.

InputJSON
{
  "method": "GET",
  "queryParams": {
    "host": "example.com"
  },
  "type": "http"
}
OutputJSON
{
  "example": {
    "host": "example.com",
    "queried_at": "2026-06-05T12:00:00Z",
    "records": [
      {
        "host": "mail.example.com.",
        "pref": 10
      }
    ]
  },
  "type": "json"
}