File type and MIME/media type inspector — identify bounded content by magic byte
File type and MIME/media type inspector — identify bounded content by magic bytes and return SHA-256, size, and extension consistency without unpacking, malware scanning, or safety claims.
Answeringour last check, 2026-09-24
1 of 1checks answered this week
634 msmedian answer time
$0.005listed price per call
$0.005price 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
POST https://artifact-inspector.use.x402atlas.com/file
| Category | Everything else |
|---|---|
| Provider host | artifact-inspector.use.x402atlas.com |
| Networks | eip155:137, eip155:42161, eip155:8453 |
| Payment schemes | exact |
| Self-reported calls, 30 days | 2 from 1 payers (the provider's figure, not ours) |
Our checks, last 30 days
| Day | Result | HTTP | Asked | Time |
|---|---|---|---|---|
| 2026-09-24 | valid payment request | 402 | $0.005 | 634 ms |
Example input (from the provider)
{
"body": {
"content_base64": "iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAQAAAC1HAwCAAAAC0lEQVR42mNk+A8AAQUBAScY42YAAAAASUVORK5CYII=",
"filename": "pixel.png"
},
"bodyType": "json",
"method": "POST",
"type": "http"
}
Promised output schema (from the provider)
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"body": {
"additionalProperties": false,
"properties": {
"content_base64": {
"description": "Canonical standard base64 for zero to 1 MiB caller-provided bytes; never a URL",
"maxLength": 1398104,
"minLength": 0,
"type": "string"
},
"filename": {
"description": "Optional synthetic base filename used only for extension comparison; paths are rejected",
"maxLength": 255,
"minLength": 1,
"type": "string"
}
},
"required": [
"content_base64"
],
"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": {
"additionalProperties": false,
"properties": {
"_atlas": {
"additionalProperties": false,
"description": "Atlas documentation and related-route metadata added after deployment",
"properties": {
"docs": {
"description": "Documentation URL for this bridge",
"format": "uri",
"maxLength": 512,
"type": "string"
},
"related": {
"description": "Bounded related Atlas routes",
"items": {
"additionalProperties": false,
"description": "One related Atlas route",
"properties": {
"bridge": {
"description": "Related bridge name",
"maxLength": 64,
"type": "string"
},
"docs": {
"description": "Related bridge documentation URL",
"format": "uri",
"maxLength": 512,
"type": "string"
},
"summary": {
"description": "Short capability summary",
"maxLength": 256,
"type": "string"
},
"url": {
"description": "Related route URL",
"format": "uri",
"maxLength": 512,
"type": "string"
}
},
"required": [
"bridge",
"url",
"docs",
"summary"
],
"type": "object"
},
"maxItems": 3,
"type": "array"
}
},
"required": [
"docs"
],
"type": "object"
},
"algorithm_version": {
"const": "go-content-sniff-v1",
"description": "Pinned bounded Go content-sniffing contract",
"type": "string"
},
"operation": {
"const": "file-inspect",
"description": "Stable operation name",
"type": "string"
},
"result": {
"additionalProperties": false,
"description": "Bounded content-sniffing and integrity result",
"properties": {
"extension": {
"description": "Lowercase filename extension or empty",
"type": "string"
},
"extension_matches": {
"description": "Comparison result or null when no registered extension was available",
"type": [
"boolean",
"null"
]
},
"extension_media_type": {
"description": "Registered media type for the extension or empty",
"type": "string"
},
"filename_provided": {
"description": "Whether a synthetic filename was supplied",
"type": "boolean"
},
"media_type": {
"description": "Bounded magic-sniffed media type; application/octet-stream means unknown",
"type": "string"
},
"sha256": {
"description": "SHA-256 of the decoded bytes",
"pattern": "^[0-9a-f]{64}$",
"type": "string"
},
"size": {
"description": "Decoded byte length",
"maximum": 1048576,
"minimum": 0,
"type": "integer"
},
"warnings": {
"description": "Extension consistency warnings",
"items": {
"description": "Human-readable warning",
"type": "string"
},
"maxItems": 4,
"type": "array"
}
},
"required": [
"size",
"sha256",
"media_type",
"filename_provided",
"extension",