# Nomos Value: USDT/TWD Exchange Rate Risk Assessment

> Nomos Value: USDT/TWD Exchange Rate Risk Assessment is a paid API for AI agents from base-agent-preflight.bytoken2023.workers.dev, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-14).

Returns a risk assessment and metadata for a USDT-to-TWD (Taiwan Dollar) value/exchange rate query, including risk score and flags.

## Facts

- Endpoint: GET https://base-agent-preflight.bytoken2023.workers.dev/x402/v1/value/usdt-twd
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/nomos-value-usdt-twd-exchange-rate-risk-assessment-798ea378
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_XPi9fSpZY0yg0zXaBZkGY

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability nomos-value-usdt-twd-exchange-rate-risk-assessment-798ea378
```

Example prompt: Run a Nomos risk preflight on a 50 USDT to TWD value operation on Base — I need the risk score and any flags before we proceed.

## When to prefer this

Use this endpoint when an AI agent needs a fast, pay-per-request risk preflight specifically for USDT-to-TWD (Taiwan Dollar) value operations on the Base blockchain (eip155:8453). Prefer it over generic risk APIs when you need compliance flags and risk scores tied to this specific currency pair before autonomous execution.

## Known failure modes

- Invalid amount format (non-numeric or negative) returns validation error
- Amount parameter missing defaults to 1 USDT — silent default may be unexpected
- Service unavailable on Cloudflare Worker edge returns 5xx
- Payment not received or x402 payment flow fails — request blocked
- Rate limiting if too many requests from same origin

## 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 with the Base network identifier (eip155:8453), a product label ('nomos-value-usdt-twd'), and an assessment object containing a risk_level string (e.g. 'low'), a numeric risk_score (0–100 scale), and a flags array listing any risk signals detected. May also include identity, activity, and provenance objects.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [],
     "properties": {
      "amount": {
       "type": "string",
       "pattern": "^[0-9]+(?:\\.[0-9]{1,18})?$",
       "description": "Optional positive decimal USDT amount. Defaults to 1."
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object",
     "properties": {
      "network": {
       "type": "string"
      },
      "product": {
       "type": "string"
      },
      "activity": {
       "type": "object"
      },
      "identity": {
       "type": "object"
      },
      "assessment": {
       "type": "object"
      },
      "provenance": {
       "type": "object"
      }
     }
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "network": "eip155:8453",
  "product": "nomos-value-usdt-twd",
  "assessment": {
   "flags": [],
   "risk_level": "low",
   "risk_score": 0
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/nomos-value-usdt-twd-exchange-rate-risk-assessment-798ea378/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from base-agent-preflight.bytoken2023.workers.dev](https://www.zero.xyz/host/base-agent-preflight.bytoken2023.workers.dev/llms.txt)