MachineMint Base transaction preflight at the service root
MachineMint Base transaction preflight at the service root. GET accepts optional from/to/value/data query parameters; POST accepts the canonical JSON body. With no input, it runs a deterministic live sample so x402 marketplaces can verify settlement and product delivery.
Answeringour last check, 2026-10-31
1 of 1checks answered this week
1359 msmedian answer time
$0.01listed price per call
$0.01price 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://machinemint-native-x402-production.up.railway.app/
| Category | Commerce and shopping |
|---|---|
| Provider host | machinemint-native-x402-production.up.railway.app |
| Networks | eip155:8453 |
| Payment schemes | exact |
| Self-reported calls, 30 days | 0 from 0 payers (the provider's figure, not ours) |
Our checks, last 30 days
| Day | Result | HTTP | Asked | Time |
|---|---|---|---|---|
| 2026-10-31 | valid payment request | 402 | $0.01 | 1359 ms |
Example input (from the provider)
{
"method": "GET",
"queryParams": {
"data": "0x",
"from": "0x4200000000000000000000000000000000000006",
"to": "0x1111111111111111111111111111111111111111",
"value": "0"
},
"type": "http"
}
Promised output schema (from the provider)
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"method": {
"enum": [
"GET"
],
"type": "string"
},
"queryParams": {
"additionalProperties": false,
"description": "Optional GET query parameters. Omit all fields to request the deterministic marketplace-verification sample.",
"properties": {
"chain": {
"default": "base",
"enum": [
"base",
"base-mainnet"
],
"type": "string"
},
"data": {
"default": "0x",
"description": "0x-prefixed calldata.",
"pattern": "^0x(?:[0-9a-fA-F]{2})*$",
"type": "string"
},
"from": {
"description": "Sender wallet for the unsigned transaction.",
"pattern": "^0x[0-9a-fA-F]{40}$",
"type": "string"
},
"to": {
"description": "Target contract or account.",
"pattern": "^0x[0-9a-fA-F]{40}$",
"type": "string"
},
"value": {
"default": "0",
"description": "Native value in wei.",
"type": [
"string",
"integer"
]
}
},
"type": "object"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method"
],
"type": "object"
},
"output": {
"properties": {
"example": {
"properties": {
"action": {
"type": "object"
},
"canonical_endpoint": {
"type": "string"
},
"chain": {
"type": "object"
},
"gas": {
"type": "object"
},
"provenance": {
"type": "object"
},
"reason_codes": {
"items": {
"type": "string"
},
"type": "array"
},
"request_mode": {
"enum": [
"provided_transaction",
"marketplace_verification_sample"
],
"type": "string"
},
"risks": {
"items": {
"type": "object"
},
"type": "array"
},
"sender": {
"type": "object"
},
"service": {
"const": "machinemint.evm.preflight"
},
"simulation": {
"type": "object"
},
"target": {
"type": "object"
},
"transaction": {
"type": "object"
},
"verdict": {
"enum": [
"PASS",
"REVIEW",
"FAIL"
],
"type": "string"
}
},
"required": [
"service",
"verdict"
],
"type": "object"
},
"type": {
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}