Aether
x402 endpoint audit: can a paying agent actually pay this API? Probes any x402 URL and validates its 402 payment requirements (CAIP-2 network, USDC asset, payTo checksum, amount, EIP-712 domain, resource URL, Bazaar discovery). Returns pass, warn or fail, a 0-100 score and a fix for every failure
Offering
- Provider
- aether-x402.vercel.app
- Method
- POST
- Offering type
- Api Endpoint
- Transport type
- http
- Category
- Blockchain And Crypto
- Delivery
- Not provided
- Pricing model
- Not provided
- x402 version
- 2
Endpoint context
- URL
https://aether-x402.vercel.app/api/x402/preflight- MIME type
- Not provided
- First seen
- 2026-10-16T01:50:32.458Z
- Last seen
- Tags
- X402, audit, Validation, Payments, testing
Payment pricing
x402 payment terms are the authoritative price for calling this endpoint.
- Payment option 1
- 0.01 USDC
Atomic price: 10000 · Network: eip155:8453 · Asset: USDC · Scheme: exact
Raw x402 terms
[
{
"scheme": "exact",
"network": "eip155:8453",
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"amount": "10000",
"payTo": "0x2B77a25a8308c30AE37781b8a0D2A21C6211e812"
}
]Observed health
- Status
- Healthy
- Latest latency
- 56 ms
- Average latency
- 117 ms
- HTTP status
- 200
- Last checked
- 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
{
"additionalProperties": false,
"properties": {
"body": {
"additionalProperties": false,
"properties": {
"body": {
"description": "Example JSON body the endpoint accepts"
},
"expect": {
"additionalProperties": false,
"description": "What the paying caller needs: fails the audit if the endpoint cannot be paid this way",
"properties": {
"asset": {
"pattern": "^0x[0-9a-fA-F]{40}$",
"type": "string"
},
"maxPriceUsd": {
"exclusiveMinimum": 0,
"type": "number"
},
"network": {
"description": "CAIP-2 network, e.g. eip155:8453",
"type": "string"
}
},
"type": "object"
},
"headers": {
"additionalProperties": {
"maxLength": 512,
"type": "string"
},
"description": "Non-credential headers the endpoint needs before its paywall (e.g. Idempotency-Key)",
"maxProperties": 10,
"type": "object"
},
"method": {
"description": "Defaults to POST when body is supplied, otherwise GET",
"enum": [
"GET",
"POST",
"PUT",
"PATCH",
"DELETE"
]
},
"url": {
"description": "Public https URL of the paid x402 endpoint to audit",
"maxLength": 2048,
"minLength": 1,
"type": "string"
}
},
"required": [
"url"
],
"type": "object"
},
"bodyType": {
"enum": [
"json",
"form-data",
"text"
],
"type": "string"
},
"method": {
"enum": [
"POST"
],
"type": "string"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method",
"bodyType",
"body"
],
"type": "object"
}Output schema
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"body": {
"additionalProperties": false,
"properties": {
"body": {
"description": "Example JSON body the endpoint accepts"
},
"expect": {
"additionalProperties": false,
"description": "What the paying caller needs: fails the audit if the endpoint cannot be paid this way",
"properties": {
"asset": {
"pattern": "^0x[0-9a-fA-F]{40}$",
"type": "string"
},
"maxPriceUsd": {
"exclusiveMinimum": 0,
"type": "number"
},
"network": {
"description": "CAIP-2 network, e.g. eip155:8453",
"type": "string"
}
},
"type": "object"
},
"headers": {
"additionalProperties": {
"maxLength": 512,
"type": "string"
},
"description": "Non-credential headers the endpoint needs before its paywall (e.g. Idempotency-Key)",
"maxProperties": 10,
"type": "object"
},
"method": {
"description": "Defaults to POST when body is supplied, otherwise GET",
"enum": [
"GET",
"POST",
"PUT",
"PATCH",
"DELETE"
]
},
"url": {
"description": "Public https URL of the paid x402 endpoint to audit",
"maxLength": 2048,
"minLength": 1,
"type": "string"
}
},
"required": [
"url"
],
"type": "object"
},
"bodyType": {
"enum": [
"json",
"form-data",
"text"
],
"type": "string"
},
"method": {
"enum": [
"POST"
],
"type": "string"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method",
"bodyType",
"body"
],
"type": "object"
},
"output": {
"properties": {
"example": {
"type": "object"
},
"type": {
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}