Call when an agent needs an HMAC-blake2b512 of text with a caller-supplied key,
Call when an agent needs an HMAC-blake2b512 of text with a caller-supplied key, encoded as hex. Exact $0.009 USDC. Prefer unpaid POST /v1/sandbox/hmac-blake2b512-hex first.
Answeringour last check, 2026-09-24
1 of 1checks answered this week
884 msmedian answer time
$0.009listed price per call
$0.009price 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://agentshelf.syntexa.ch/v1/hmac-blake2b512-hex
| Category | Code and developer |
|---|---|
| Provider host | agentshelf.syntexa.ch |
| Networks | eip155:8453 |
| 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 |
|---|---|---|---|---|
| 2026-09-24 | valid payment request | 402 | $0.009 | 884 ms |
Example input (from the provider)
{
"body": {
"key": "secret",
"text": "hello"
},
"bodyType": "json",
"method": "POST",
"type": "http"
}
Promised output schema (from the provider)
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"body": {
"additionalProperties": false,
"properties": {
"key": {
"maxLength": 512,
"minLength": 1,
"type": "string"
},
"text": {
"maxLength": 100000,
"minLength": 1,
"type": "string"
}
},
"required": [
"text"
],
"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": {
"algorithm": {
"type": "string"
},
"billed": {
"type": "boolean"
},
"digest": {
"type": "string"
},
"encoding": {
"type": "string"
},
"ok": {
"const": true,
"type": "boolean"
},
"receipt_id": {
"type": "string"
},
"warnings": {
"default": [],
"items": {
"type": "string"
},
"type": "array"
}
},
"required": [
"ok",
"receipt_id",
"billed",
"algorithm",
"encoding",
"digest"
],
"type": "object"
},
"type": {
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}