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Nomos BTC/USD Value API
x402
Nomos BTC/USD Value API is a paid API for AI agents from base-agent-preflight.bytoken2023.workers.dev, paid per call via x402, $0.002/call, status unknown (last checked 2026-09-14).
Returns the current BTC/USD price along with a risk assessment and flags for a given BTC amount.
Price / call$0.002
Success—
StatusUnknown
How this service works
Machine-payable service intelligence for discovering, verifying, and monitoring identity, risk, authorization, execution-preflight, and evidence APIs before autonomous agents spend.
Output
Returns a JSON object containing the Base network identifier (eip155:8453), product name (nomos-value-btc-usd), and an assessment object with risk_level (e.g. 'low'), numeric risk_score, and a flags array indicating any detected risk signals. May also include identity, activity, and provenance sub-objects.
Example use cases
Agent preflight BTC value check
“Before I execute this trade, can you check the current USD value and risk level of 2 BTC so I know it's safe to proceed?”
Portfolio valuation in USD
“What is the current BTC/USD price and what is 0.5 BTC worth right now — and is there any risk flag I should know about?”
Automated risk scoring for BTC transaction
“I'm about to send 1 BTC — can you look up the current BTC/USD rate and tell me the risk score before I confirm?”
Technical details
Endpoint
GEThttps://base-agent-preflight.bytoken2023.workers.dev/x402/v1/value/btc-usdWhen to prefer
Choose this endpoint when you need a pay-per-request BTC/USD price lookup that also returns a structured risk assessment and flags — ideal for agent preflight checks before executing BTC-denominated transactions. Prefer it over generic price APIs when you need risk scoring bundled with the price lookup in a single call on the Base network.
Side effects
- Invalid BTC amount format (must match ^[0-9]+(?:\.[0-9]{1,18})?$) returns a 400 error
- Payment not received or insufficient USDC results in 402 Payment Required
- Network or worker outage may return 503
- Negative or zero amount may be rejected
- Missing or malformed query parameters may return validation errors
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"network": "eip155:8453",
"product": "nomos-value-btc-usd",
"assessment": {
"flags": [],
"risk_level": "low",
"risk_score": 0
}
}
}Tags
x402
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