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Rubric Protocol Hedera Supply Facts
x402
Rubric Protocol Hedera Supply Facts is a paid API for AI agents from rubric-protocol.com, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-14).
Returns the current HBAR total/circulating supply with a post-quantum ML-DSA-65 attestation ID anchoring the snapshot to Hedera HCS
Price / call$0.001
Success—
StatusUnknown
How this service works
Attested Hedera network facts: HBAR exchange rate, gas fees, supply, node roster, throughput, topic state. Each response
Output
A JSON snapshot containing the current HBAR total supply and/or circulating supply figures, a timestamp for when the snapshot was taken, and an ML-DSA-65 post-quantum attestation ID referencing the Hedera Consensus Service (HCS) sequence number that anchors the data tamper-evidently on-chain. This allows any downstream consumer to independently verify that the data has not been altered.
Example use cases
Auditable DeFi collateral check
“Pull the attested HBAR circulating supply right now from Rubric Protocol — I need the attestation ID so my smart contract audit can prove exactly what supply figure I was relying on when I made this collateral decision.”
Compliance report with provable data
“Get me the current HBAR total supply with its post-quantum attestation ID from Rubric Protocol so I can attach it to my regulatory compliance report as tamper-evident evidence.”
Agent decision audit trail
“Before my agent executes this HBAR-denominated transaction, grab the current supply snapshot from Rubric Protocol with its Hedera HCS-anchored attestation ID so we have an unforgeable record of what the supply was at decision time.”
Technical details
Endpoint
GEThttps://rubric-protocol.com/v1/x402/hedera-facts/supplyWhen to prefer
Choose this endpoint when your agent or system needs cryptographically provable, tamper-evident HBAR supply data rather than simply a raw number from an unauthenticated source. It is ideal for compliance, audit trails, regulated DeFi applications, or any agent workflow where you must prove what data you acted on at a specific moment. Prefer it over generic blockchain explorers when post-quantum attestation and HCS anchoring are required.
Side effects
- Payment not received or invalid x402 USDC payment header — returns 402 Payment Required
- Hedera mirror node temporarily unavailable — may return stale snapshot or 503 error
- Invalid request format — returns 400 with schema validation error
- Rate limiting exceeded — returns 429
- Network congestion causing delayed HCS anchoring — attestation ID may reference a slightly older sequence
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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