ENS name resolution in both directions on Ethereum mainnet
ENS name resolution in both directions on Ethereum mainnet. Pass name to resolve an ENS name to its address (forward), or pass address to get that address's primary ENS name (reverse, forward-verified so spoofed reverse records are rejected). Read straight from the ENS registry. Use it to turn vitalik.eth into an address, or to label a raw address with a human-readable name.
Answeringour last check, 2026-09-24
1 of 1checks answered this week
972 msmedian answer time
$0.003listed price per call
$0.003price it asked us
Paid test badge: not yet. The checks above are free: we call the tool without paying and read the payment request it sends back. The Verified badge needs paid calls whose answers match the promised output, and nobody can buy a badge.
Endpoint
GET https://chain.cyberwarex.com/ens
| Category | Company and compliance |
|---|---|
| Provider host | chain.cyberwarex.com |
| Networks | eip155:8453 |
| Payment schemes | exact |
| Self-reported calls, 30 days | 36 from 3 payers (the provider's figure, not ours) |
Our checks, last 30 days
| Day | Result | HTTP | Asked | Time |
|---|---|---|---|---|
| 2026-09-24 | valid payment request | 402 | $0.003 | 972 ms |
Example input (from the provider)
{
"method": "GET",
"queryParams": {
"name": "vitalik.eth"
},
"type": "http"
}
Promised output schema (from the provider)
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"method": {
"enum": [
"GET",
"HEAD",
"DELETE"
],
"type": "string"
},
"queryParams": {
"additionalProperties": false,
"anyOf": [
{
"required": [
"name"
]
},
{
"required": [
"address"
]
}
],
"properties": {
"address": {
"description": "Address to reverse-resolve to its primary ENS name.",
"pattern": "^0x[a-fA-F0-9]{40}$",
"type": "string"
},
"name": {
"description": "ENS name to resolve forward, e.g. vitalik.eth.",
"type": "string"
}
},
"required": [],
"type": "object"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method"
],
"type": "object"
},
"output": {
"properties": {
"example": {
"properties": {
"address": {
"type": [
"string",
"null"
]
},
"name": {
"type": [
"string",
"null"
]
},
"note": {
"description": "Set when a reverse record failed forward verification.",
"type": [
"string",
"null"
]
},
"resolved": {
"type": "boolean"
}
},
"type": "object"
},
"type": {
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}