JSON validator
JSON validator - checks whether text is valid JSON, with type, size, depth, key count and error line and column
Answeringour last check, 2026-10-18
1 of 1checks answered this week
285 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://saylorinnovations.com/api/json/validate
| Category | Everything else |
|---|---|
| Provider host | saylorinnovations.com |
| Networks | eip155:8453, solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp |
| Payment schemes | exact |
| Self-reported calls, 30 days | 2 from 2 payers (the provider's figure, not ours) |
Our checks, last 30 days
| Day | Result | HTTP | Asked | Time |
|---|---|---|---|---|
| 2026-10-18 | valid payment request | 402 | $0.01 | 285 ms |
Example input (from the provider)
{
"method": "GET",
"queryParams": {
"json": "{\"a\":[1,2,{\"b\":null}]}"
},
"type": "http"
}
Promised output schema (from the provider)
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"method": {
"enum": [
"GET",
"POST",
"PUT",
"PATCH",
"DELETE",
"HEAD"
],
"type": "string"
},
"queryParams": {
"properties": {
"json": {
"description": "JSON text to validate (max 100,000 chars)",
"type": "string"
}
},
"required": [
"json"
],
"type": "object"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method"
],
"type": "object"
},
"output": {
"properties": {
"example": {
"properties": {
"bytes": {
"description": "Size in bytes",
"type": "number"
},
"checked_at": {
"description": "Time the check was run (UTC)",
"type": [
"string",
"null"
]
},
"column": {
"type": [
"number",
"null"
]
},
"error": {
"description": "Error message, if any",
"type": "string"
},
"line": {
"description": "Line number or text of the line",
"type": [
"number",
"null"
]
},
"max_depth": {
"description": "Max depth",
"type": "number"
},
"top_level_items": {
"description": "Top level items",
"type": [
"number",
"null"
]
},
"total_keys": {
"description": "Total keys",
"type": "number"
},
"type": {
"description": "Type or kind",
"type": "string"
},
"valid": {
"description": "True when the input passed validation",
"type": "boolean"
}
},
"required": [
"valid"
],
"type": "object"
},
"type": {
"const": "json",
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}