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Obol USDT/USD Spot Price Feed
x402
Obol USDT/USD Spot Price Feed is a paid API for AI agents from obol-x402.fly.dev, paid per call via x402, $0.01/call, status down (last checked 2026-09-15).
Returns a cryptographically signed USDT/USD spot price quote aggregated from Coinbase and Kraken, including a stablecoin peg divergence flag.
Price / call$0.01
Success—
StatusDown
How this service works
USDT USD spot price stablecoin quote Coinbase Kraken with divergence flag. Single-asset USDT/USD for AI agents. Cryptographically signed (Ed25519) — every response is independently verifiable via /.well-known/obol-pubkey.
Output
Returns the current USDT/USD spot price aggregated from Coinbase and Kraken, a boolean or flag indicating stablecoin peg divergence, a timestamp, and an Ed25519 cryptographic signature that can be independently verified against the public key at /.well-known/obol-pubkey.
Example use cases
Stablecoin peg monitoring for trading bots
“Before I execute this large USDT trade, pull the latest signed spot price and let me know if there's any peg divergence showing up between Coinbase and Kraken. I need to know it's safe to proceed.”
Cryptographic price verification for settlement
“I need a tamper-proof USDT/USD quote I can verify independently — something I can audit later and prove came from a legitimate source. Can you fetch that for me along with the signature?”
Real-time stablecoin health check for agents
“My agent is about to move capital into USDT but I want it to check the peg first. Give me the current price across both exchanges and flag anything unusual so the agent knows whether to proceed.”
Technical details
Endpoint
GEThttps://obol-x402.fly.dev/v1/price/USDTWhen to prefer
Use this endpoint when you need a cryptographically verifiable USDT/USD price with peg divergence detection from multiple exchanges (Coinbase + Kraken). Prefer over generic price APIs when auditability and tamper-evidence matter, or when you need to detect stablecoin de-peg events programmatically for an AI agent workflow.
Side effects
- Exchange API unavailability causes stale or missing price data
- Payment of $0.01 USDC not included or rejected via x402 protocol results in 402 Payment Required
- Network timeout to fly.dev host returns 5xx error
- Signature verification failure if public key mismatch or response tampered in transit
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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