Compute cryptographic hashes / checksums of a string or of raw bytes (base64)
Compute cryptographic hashes / checksums of a string or of raw bytes (base64). Returns lowercase hex for each requested algorithm: sha256 (default), sha512, sha1, md5. SHA via native Web Crypto; md5 and sha1 are offered for legacy interop only and flagged — not for security. POST so the input never lands in a URL/log. Verification/checksums only, not a hash cracker.
Answeringour last check, 2026-09-24
1 of 1checks answered this week
5296 msmedian answer time
$0.001listed price per call
$0.001price 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://402utils.com/v1/hash
| Category | Market data |
|---|---|
| Provider host | 402utils.com |
| Networks | eip155:8453 |
| Payment schemes | exact |
| Self-reported calls, 30 days | 7 from 4 payers (the provider's figure, not ours) |
Our checks, last 30 days
| Day | Result | HTTP | Asked | Time |
|---|---|---|---|---|
| 2026-09-24 | valid payment request | 402 | $0.001 | 5296 ms |
Example input (from the provider)
{
"body": {
"algorithms": [
"sha256",
"md5"
],
"text": "hello world"
},
"bodyType": "json",
"method": "POST",
"type": "http"
}
Promised output schema (from the provider)
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"body": {
"description": "Exactly one of `text` or `bytes`, plus an optional algorithm list.",
"properties": {
"algorithms": {
"default": [
"sha256"
],
"description": "Which digests to compute (default [\"sha256\"]).",
"items": {
"enum": [
"sha256",
"sha512",
"sha1",
"md5"
],
"type": "string"
},
"type": "array"
},
"bytes": {
"description": "Raw bytes as base64 (standard or url-safe) \u2014 alternative to `text`.",
"type": "string"
},
"text": {
"description": "UTF-8 text to hash.",
"type": "string"
}
},
"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": {
"properties": {
"bytes": {
"description": "Byte length of the hashed input.",
"type": "integer"
},
"hashes": {
"description": "Map of algorithm \u2192 lowercase hex digest.",
"type": "object"
},
"warnings": {
"description": "Present when a broken/legacy algorithm (md5, sha1) was requested.",
"items": {
"type": "string"
},
"type": "array"
}
},
"required": [
"bytes",
"hashes"
],
"type": "object"
},
"type": {
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}