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x402.forgemesh.io Provably-Fair Random Number API
x402
x402.forgemesh.io Provably-Fair Random Number API is a paid API for AI agents from x402.forgemesh.io, paid per call via x402, $0.002/call, status unknown (last checked 2026-09-15).
Generates a verifiable random integer in a user-specified range using HMAC-SHA256 over a client seed, returning the server seed so the result can be independently audited.
Price / call$0.002
Success—
StatusUnknown
How this service works
Provably-fair random number API: an integer in your min-max range drawn via HMAC-SHA256 over your client seed, with the server seed revealed in the response so anyone can recompute and verify the draw was fair. For games, raffles, sampling, A/B assignment, and tie-breaking between agents.
Output
Returns a random integer within the specified min-max range, plus the server seed used in the HMAC-SHA256 computation, allowing any party to independently recompute and confirm the result was not manipulated.
Example use cases
Example prompt
“Pick a provably fair random number between 1 and 500 using my seed 'myseed42' so I can verify the draw myself afterward.”
Technical details
Endpoint
POSThttps://x402.forgemesh.io/provably-fair-randomWhen to prefer
Choose this endpoint when you need a random number that is independently auditable — i.e. when players, participants, or auditors must be able to verify after the fact that the draw was not rigged. Ideal for games, raffles, lotteries, A/B assignment, or any context requiring trustless randomness.
Side effects
- Invalid min/max range (e.g. min >= max) returns an error
- Missing or malformed client_seed may cause rejection
- Payment of $0.002 USDC not included or invalid returns 402 Payment Required
- Server-side HMAC computation failure returns 500
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| max | string | default 100 |
| min | string | default 1 |
| client_seed | string | your seed for verifiability |
Output
Schema · Response
{
"type": "json",
"example": {
"proof": "HMAC-SHA256(server_seed, client_seed) first 4 bytes mod range — recompute to verify",
"value": 4,
"server_seed_revealed": "e3b1..."
}
}Tags
x402
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