Link budget
Link budget: received power, fade margin and maximum free-space range from TX power, antenna gains, losses and sensitivity.
Answers HTTP 429 without x402 payment termsour last check, 2026-10-21
0 of 1checks answered this week
n/amedian answer time
$0.02listed price per call
n/aprice it asked us
Paid test badge: not yet. The checks above are free: we call the tool without paying and read the payment request it sends back. The Verified badge needs paid calls whose answers match the promised output, and nobody can buy a badge.
Endpoint
GET https://radio-calc.x402tookit.com/link-budget
| Category | Everything else |
|---|---|
| Provider host | radio-calc.x402tookit.com |
| Networks | eip155:137, eip155:42161, eip155:8453, solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp |
| Payment schemes | exact |
| Self-reported calls, 30 days | 1 from 1 payers (the provider's figure, not ours) |
Our checks, last 30 days
| Day | Result | HTTP | Asked | Time |
|---|---|---|---|---|
| 2026-10-21 | no x402 terms | 429 | 273 ms |
Example input (from the provider)
{
"method": "GET",
"queryParams": {
"distanceKm": 5,
"frequencyMHz": 868,
"lossesDb": 2,
"rxGainDbi": 2,
"sensitivityDbm": -120,
"txGainDbi": 2,
"txPowerDbm": 14
},
"type": "http"
}
Promised output schema (from the provider)
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"method": {
"enum": [
"GET"
],
"type": "string"
},
"queryParams": {
"properties": {
"distanceKm": {
"description": "Link distance in kilometres",
"type": "number"
},
"frequencyMHz": {
"description": "Frequency in MHz",
"type": "number"
},
"lossesDb": {
"description": "Total cable, connector and other losses in dB (default 0)",
"type": "number"
},
"rxGainDbi": {
"description": "Receive antenna gain in dBi (default 0)",
"type": "number"
},
"sensitivityDbm": {
"description": "Receiver sensitivity in dBm (for example -120 for LoRa), to get the margin and max range",
"type": "number"
},
"txGainDbi": {
"description": "Transmit antenna gain in dBi (default 0)",
"type": "number"
},
"txPowerDbm": {
"description": "Transmitter output power in dBm",
"type": "number"
}
},
"required": [
"txPowerDbm",
"frequencyMHz",
"distanceKm"
],
"type": "object"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method"
],
"type": "object"
},
"output": {
"properties": {
"example": {
"properties": {
"asOf": {
"type": [
"null",
"string"
]
},
"degraded": {
"type": [
"boolean",
"null"
]
},
"disclaimer": {
"type": [
"null",
"string"
]
},
"eirpDbm": {
"type": [
"null",
"number"
]
},
"fadeMarginDb": {
"type": [
"null",
"number"
]
},
"freeSpacePathLossDb": {
"type": [
"null",
"number"
]
},
"maxFreeSpaceRangeKm": {
"type": [
"null",
"number"
]
},
"notChecked": {
"items": {
"type": "string"
},
"type": [
"array",
"null"
]
},
"reasons": {
"items": {
"type": "string"
},
"type": [
"array",
"null"
]
},
"receivedPowerDbm": {
"type": [
"null",
"number"
]
},
"sensitivityDbm": {
"type": [
"null",
"number"
]
},
"source": {
"type": [
"null",
"string"
]
},
"summary": {
"type": [
"null",
"string"
]
},
"verdict": {
"type": [
"null",
"string"
]
}
},
"type": "object"
},
"type": {
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}