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Nomos Crypto-to-Fiat Value Converter
x402
Nomos Crypto-to-Fiat Value Converter is a paid API for AI agents from base-agent-preflight.bytoken2023.workers.dev, paid per call via x402, $0.005/call, status unknown (last checked 2026-09-14).
Converts a specified amount of BTC, ETH, TRX, USDT, or USDC into its equivalent USD or TWD fiat value for agent budget checks and cost calculations.
Price / call$0.005
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 the fiat-denominated value of the specified crypto amount, along with metadata including the asset, network, product context, and provenance fields. The agent receives a structured JSON object with the converted value in USD or TWD, enabling downstream budget decisions or authorization checks.
Example use cases
Agent spend-limit preflight check
“Before my agent pays for that API call, convert 0.05 ETH to USD so I can confirm it's within the $80 spending limit I set.”
TWD budget calculation for Taiwan market
“I'm running a campaign budget in Taiwan — can you convert 500 USDT to TWD so I know the local-currency equivalent?”
BTC invoice validation before approval
“A vendor sent me an invoice for 0.002 BTC — what's that in USD today so I can approve or reject it?”
Technical details
Endpoint
POSThttps://base-agent-preflight.bytoken2023.workers.dev/x402/v1/value/convertWhen to prefer
Choose this endpoint when an autonomous agent needs a real-time crypto-to-fiat conversion for budget gating, spend-limit enforcement, or invoice validation — specifically for BTC, ETH, TRX, USDT, or USDC quoted in USD or TWD. It is purpose-built for agent preflight workflows (Nomos ecosystem) and integrates natively with x402 micropayment rails. Prefer it over generic exchange-rate APIs when you need the Nomos provenance and identity context fields in the response, or when operating within the bytoken2023 agent infrastructure.
Side effects
- Unsupported asset symbol (only BTC, ETH, TRX, USDT, USDC accepted) → validation error
- Amount string fails pattern validation (must be positive decimal up to 18 decimal places) → 400 bad request
- Unsupported quote currency (only USD or TWD) → enum validation error
- Payment not provided or insufficient → 402 Payment Required (x402 protocol)
- Upstream price feed unavailable → 503 or error response
- Idempotency key collision with differing parameters → conflict error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"network": "eip155:8453",
"product": "nomos-value-convert",
"assessment": {
"flags": [],
"risk_level": "low",
"risk_score": 0
}
}
}Tags
x402
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