# fx402 /v1/list — Currency & Unit Conversion Reference List

> fx402 /v1/list — Currency & Unit Conversion Reference List is a paid API for AI agents from fx402.alogos.xyz, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-15).

Returns the full list of supported currencies and unit conversion categories available in the fx402 pay-per-call conversion service

## Facts

- Endpoint: GET https://fx402.alogos.xyz/v1/list
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/fx402-v1-list-currency-unit-conversion-reference-list-05013775
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_IuF13qaKJ4uWTXBwdb6NP

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 fx402-v1-list-currency-unit-conversion-reference-list-05013775
```

Example prompt: What currencies and unit types does fx402 support? Show me everything available — pull the full list including all currency codes and physical unit categories.

## When to prefer this

Use this endpoint when an agent needs to discover or validate what currencies or unit types fx402 supports before making a conversion call, or when building a UI/menu of available options. It is the discovery/capability-enumeration endpoint for the fx402 service, not the conversion endpoint itself.

## Known failure modes

- Payment not provided or rejected — returns 402 Payment Required
- Invalid 'include' parameter value — may return 400 or ignore the parameter
- Service temporarily unavailable — 503 or timeout
- Network connectivity issue to fx402.alogos.xyz

## How this service works

Pay-per-call currency and unit conversion utility for AI agents: currency exchange at ECB daily reference rates, FX rate tables, and physical unit conversion (length, mass, temperature, volume, area, speed, time, digital). No API key, no subscription — agents pay per request via x402 (Base/USDC) or MPP (Tempo/pathUSD).

## Output

A structured list of all currencies (referenced against ECB daily rates) and physical unit conversion categories (length, mass, temperature, volume, area, speed, time, digital) that the fx402 service supports, enabling agents to validate inputs before making conversion calls.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "include": {
   "enum": [
    "all"
   ],
   "type": "string",
   "description": "Reference scope to return. Currently only 'all' is supported; this optional parameter exists so agent registries can detect a concrete input schema."
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "object",
 "required": [
  "currencies",
  "units"
 ],
 "properties": {
  "units": {
   "type": "object",
   "additionalProperties": {
    "type": "array",
    "items": {
     "type": "string"
    }
   }
  },
  "ratesDate": {
   "type": "string"
  },
  "currencies": {
   "type": "array",
   "items": {
    "type": "string"
   }
  }
 },
 "additionalProperties": true
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/fx402-v1-list-currency-unit-conversion-reference-list-05013775/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from fx402.alogos.xyz](https://www.zero.xyz/host/fx402.alogos.xyz/llms.txt)