Note name, MIDI number and Hz at a fret on guitar, bass, ukulele or violin strin
Note name, MIDI number and Hz at a fret on guitar, bass, ukulele or violin strings, with alternate tunings.
Answers HTTP 429 without x402 payment termsour last check, 2026-10-21
0 of 1checks answered this week
n/amedian answer time
$0.02listed price per call
n/aprice it asked us
Paid test badge: not yet. The checks above are free: we call the tool without paying and read the payment request it sends back. The Verified badge needs paid calls whose answers match the promised output, and nobody can buy a badge.
Endpoint
GET https://music-production-calc.x402tookit.com/fret-note
| Category | Everything else |
|---|---|
| Provider host | music-production-calc.x402tookit.com |
| Networks | eip155:137, eip155:42161, eip155:8453, solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp |
| Payment schemes | exact |
| Self-reported calls, 30 days | 1 from 1 payers (the provider's figure, not ours) |
Our checks, last 30 days
| Day | Result | HTTP | Asked | Time |
|---|---|---|---|---|
| 2026-10-21 | no x402 terms | 429 | 359 ms |
Example input (from the provider)
{
"method": "GET",
"queryParams": {
"fret": 5,
"instrument": "guitar",
"string": 6
},
"type": "http"
}
Promised output schema (from the provider)
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"method": {
"enum": [
"GET"
],
"type": "string"
},
"queryParams": {
"properties": {
"a4": {
"description": "Reference pitch for A4 in Hz, 400 to 480 (default 440)",
"type": "number"
},
"fret": {
"description": "Fret 0 (open) to 24",
"type": "integer"
},
"instrument": {
"description": "guitar, bass, ukulele or violin",
"type": "string"
},
"string": {
"description": "String number, 1 = highest-pitched in normal numbering (guitar 6 = low E)",
"type": "integer"
},
"tuningOffset": {
"description": "Tune the whole instrument by semitones, -12 to 12 (-2 = whole step down); default 0",
"type": "integer"
}
},
"required": [
"instrument",
"string",
"fret"
],
"type": "object"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method"
],
"type": "object"
},
"output": {
"properties": {
"example": {
"properties": {
"a4Used": {
"type": [
"null",
"number"
]
},
"asOf": {
"type": [
"null",
"string"
]
},
"degraded": {
"type": [
"boolean",
"null"
]
},
"disclaimer": {
"type": [
"null",
"string"
]
},
"frequencyHz": {
"type": [
"null",
"number"
]
},
"fretNumber": {
"type": [
"null",
"number"
]
},
"instrument": {
"type": [
"null",
"string"
]
},
"midiNumber": {
"type": [
"null",
"number"
]
},
"notChecked": {
"items": {
"type": "string"
},
"type": [
"array",
"null"
]
},
"noteFlat": {
"type": [
"null",
"string"
]
},
"noteSharp": {
"type": [
"null",
"string"
]
},
"octaveUp12thFretNote": {
"type": [
"null",
"string"
]
},
"openStringMidi": {
"type": [
"null",
"number"
]
},
"openStringNote": {
"type": [
"null",
"string"
]
},
"reasons": {
"items": {
"type": "string"
},
"type": [
"array",
"null"
]
},
"source": {
"type": [
"null",
"string"
]
},
"stringNumber": {
"type": [
"null",
"number"
]
},
"summary": {
"type": [
"null",
"string"
]
},
"tuningOffsetSemitones": {
"type": [
"null",
"number"
]
},
"verdict": {
"type": [
"null",
"string"
]
}
},
"type": "object"
},
"type": {
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}