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Rubric Protocol Attested HBAR Exchange Rate
x402
Rubric Protocol Attested HBAR Exchange Rate 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/USD exchange rate from the Hedera network with a tamper-evident ML-DSA-65 post-quantum attestation anchored 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
Returns the current HBAR/USD exchange rate as observed on the Hedera network, accompanied by a ML-DSA-65 post-quantum attestation ID that cryptographically links the snapshot to a specific Hedera HCS sequence number, making the price data tamper-evident and independently verifiable.
Example use cases
DeFi agent trade price audit trail
“Before my agent executes this HBAR swap, grab the attested HBAR exchange rate from Rubric so I have a post-quantum-signed, Hedera-anchored record of exactly what rate it saw when it decided to trade.”
Compliance snapshot for regulators
“Pull the current attested HBAR/USD rate from Rubric Protocol and save the ML-DSA-65 attestation ID — I need tamper-evident proof of the price for our compliance report.”
Autonomous agent decision provability
“My AI agent just made a financial decision based on the HBAR price — fetch the Rubric attested exchange rate right now so we can prove to auditors exactly what the rate was at decision time.”
Technical details
Endpoint
GEThttps://rubric-protocol.com/v1/x402/hedera-facts/exchange-rateWhen to prefer
Choose this endpoint when your agent must not only know the current HBAR exchange rate but also prove what it knew — e.g. for audit trails, regulatory compliance, dispute resolution, or any scenario where a signed, tamper-evident record of the price at decision time is required. Prefer over standard price feeds when post-quantum attestation and HCS anchoring are necessary.
Side effects
- Payment not received or underpaid — returns 402 Payment Required
- Hedera network temporarily unavailable — snapshot may be stale or error returned
- Invalid request format — returns 400 Bad Request
- Rate limiting or quota exceeded — returns 429 Too Many Requests
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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