Provably-fair draw from the drand beacon with the full verifiable receipt + nonc
Provably-fair draw from the drand beacon with the full verifiable receipt + nonce-binding (the free draw is at GET /random).
Answeringour last check, 2026-09-24
1 of 1checks answered this week
577 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
GET https://touchstone.locomot.io/random/proof
| Category | Everything else |
|---|---|
| Provider host | touchstone.locomot.io |
| Networks | eip155:8453 |
| Payment schemes | exact |
| Self-reported calls, 30 days | 3 from 3 payers (the provider's figure, not ours) |
Our checks, last 30 days
| Day | Result | HTTP | Asked | Time |
|---|---|---|---|---|
| 2026-09-24 | valid payment request | 402 | $0.001 | 577 ms |
Example input (from the provider)
{
"method": "GET",
"queryParams": {
"items": "alice,bob,carol,dave",
"k": 1,
"nonce": "raffle-1",
"op": "pick"
},
"type": "http"
}
Promised output schema (from the provider)
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"method": {
"enum": [
"GET",
"HEAD",
"DELETE"
],
"type": "string"
},
"queryParams": {
"properties": {
"count": {
"type": "integer"
},
"dice": {
"description": "e.g. 3d6",
"type": "string"
},
"items": {
"description": "comma list or JSON array",
"type": "string"
},
"k": {
"type": "integer"
},
"max": {
"type": "integer"
},
"min": {
"type": "integer"
},
"n": {
"type": "integer"
},
"nonce": {
"description": "bind the draw to your context",
"type": "string"
},
"op": {
"description": "draw type; default int",
"enum": [
"int",
"dice",
"coin",
"bytes",
"uuid",
"shuffle",
"sample",
"choice",
"pick"
],
"type": "string"
},
"round": {
"description": "pin a drand round (reproducible)",
"type": "integer"
},
"sides": {
"type": "integer"
},
"weights": {
"type": "string"
}
},
"type": "object"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method"
],
"type": "object"
},
"output": {
"properties": {
"beacon": {
"type": "object"
},
"deterministic_given_round": {
"type": "boolean"
},
"draw": {
"type": "string"
},
"engine": {
"type": "string"
},
"nonce": {
"type": "string"
},
"notation": {
"type": "string"
},
"op": {
"type": "string"
},
"proof": {
"type": "object"
},
"rolls": {
"type": "array"
},
"total": {
"type": "integer"
}
},
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}