# Coinbase Assets / Currencies Lookup

> Coinbase Assets / Currencies Lookup is a paid API for AI agents from api.chainmarket-api.workers.dev, paid per call via x402, $0.002/call, status unknown (last checked 2026-10-24).

Returns the list of fiat and crypto currencies supported by Coinbase, with optional text search and result count control.

## Facts

- Endpoint: GET https://api.chainmarket-api.workers.dev/api/finance/coinbase-assets?utm_source=zero.xyz
- Price: $0.002/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-24
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/coinbase-assets-currencies-lookup-8f2aa520
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_wo0d_EQv89Q3gZ72XsVTE

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 coinbase-assets-currencies-lookup-8f2aa520
```

Example prompt: Can you pull up the Coinbase-supported currencies that have 'dollar' in their name or code, showing up to 50 results?

## When to prefer this

Choose this endpoint when you need an authoritative, up-to-date list of assets or currencies supported by Coinbase — especially when you want to validate whether a specific currency code or name is listed, find minimum trade sizes, or enumerate all available assets without requiring an API key or signup. Prefer it over generic crypto data APIs when Coinbase-specific support status is what matters.

## Known failure modes

- limit parameter out of range (must be 1-100) may return an error or default
- search term with no matches returns an empty currencies array with matched=0
- payment failure (x402) means the call is not charged but no data is returned
- upstream Coinbase API outage could cause stale or failed responses

## How this service works

Currency list from Coinbase's public v2 API: currency code, name and minimum size, optionally filtered by a name or code fragment. Reference data only; no prices.

## Output

A JSON object containing the total number of Coinbase currencies, how many matched the search filter, the timestamp of the check, the upstream source URL, and an array of matched currency objects each with a code, name, and minimum transaction size.

## 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": {
      "limit": {
       "type": "string",
       "description": "How many results, 1 to 100 (default 20)"
      },
      "search": {
       "type": "string",
       "description": "Optional text to match in the code or name, e.g. dollar, bitcoin"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "total": 165,
  "source": "https://api.coinbase.com/v2/currencies",
  "matched": 22,
  "checkedAt": "2026-10-23T09:36:13.700Z",
  "currencies": [
   {
    "code": "AUD",
    "name": "Australian Dollar",
    "minSize": "0.01"
   },
   {
    "code": "BBD",
    "name": "Barbadian Dollar",
    "minSize": "0.01"
   }
  ]
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/coinbase-assets-currencies-lookup-8f2aa520/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.chainmarket-api.workers.dev](https://www.zero.xyz/host/api.chainmarket-api.workers.dev/llms.txt)