Canonicalizes firmware hash, version, device model and minimum bootloader versio
Canonicalizes firmware hash, version, device model and minimum bootloader version, then produces a SHA-256 manifest digest and HMAC-SHA256 release tag using caller-supplied ephemeral key material. This is a symmetric integrity tag, not a vendor PKI signature or code-signing service.
Answeringour last check, 2026-09-24
1 of 1checks answered this week
873 msmedian answer time
$0.003listed price per call
$0.003price 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://iot.halowerk.com/v1/ota-sign
| Category | Code and developer |
|---|---|
| Provider host | iot.halowerk.com |
| Networks | eip155:8453 |
| 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 |
|---|---|---|---|---|
| 2026-09-24 | valid payment request | 402 | $0.003 | 873 ms |
Example input (from the provider)
{
"body": {
"device_model": "edge-node-x2",
"ephemeral_release_key": "example-release-key-2026",
"firmware_sha256": "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa",
"minimum_bootloader": "2.0.0",
"version": "4.2.1"
},
"bodyType": "json",
"method": "POST",
"type": "http"
}
Promised output schema (from the provider)
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"body": {
"additionalProperties": false,
"properties": {
"device_model": {
"maxLength": 128,
"minLength": 1,
"type": "string"
},
"ephemeral_release_key": {
"description": "Ephemeral example key; do not submit a long-lived production signing key.",
"maxLength": 512,
"minLength": 16,
"type": "string"
},
"firmware_sha256": {
"pattern": "^[0-9a-fA-F]{64}$",
"type": "string"
},
"minimum_bootloader": {
"maxLength": 64,
"minLength": 1,
"type": "string"
},
"version": {
"maxLength": 64,
"minLength": 1,
"type": "string"
}
},
"required": [
"firmware_sha256",
"version",
"device_model",
"minimum_bootloader",
"ephemeral_release_key"
],
"type": "object"
},
"bodyType": {
"enum": [
"json",
"form-data",
"text"
],
"type": "string"
},
"method": {
"enum": [
"POST",
"PUT",
"PATCH"
],
"type": "string"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method",
"bodyType",
"body"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}