# USDC Circulating Supply (All Chains)

> USDC Circulating Supply (All Chains) is a paid API for AI agents from x402-seller-0ay3.onrender.com, paid per call via x402, $0.005/call, status unknown (last checked 2026-09-14).

Returns the total USDC circulating supply across all chains combined, in USD, sourced from DefiLlama's stablecoins API.

## Facts

- Endpoint: GET https://x402-seller-0ay3.onrender.com/api/price/usdc-supply
- Price: $0.005/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/usdc-circulating-supply-all-chains-81ed666d
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_dRVE6GzauMp3RWLOQwgGm

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 usdc-circulating-supply-all-chains-81ed666d
```

Example prompt: What's the current total USDC circulating supply across all chains combined, in USD?

## When to prefer this

Choose this endpoint when you need a quick, no-parameter lookup of the aggregate USDC circulating supply across all chains combined. It is ideal for dashboards, market-sizing queries, or stablecoin dominance comparisons. If you need per-chain USDC breakdowns or supply for other stablecoins like USDT or DAI, consider sibling endpoints on the same host.

## Known failure modes

- DefiLlama upstream API unavailable — endpoint may return an error or stale data
- Render.com cold-start delay if the service has been idle — first request may time out
- Stale data if DefiLlama's stablecoins feed is delayed or experiencing an outage

## How this service works

Total USDC circulating supply (all chains combined), in USD, source DefiLlama. No parameters.

## Output

A JSON object containing the USDC symbol, total circulating supply expressed in USD (e.g. ~$62 billion), the timestamp when the data was fetched, and the DefiLlama source URL used to retrieve the data.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "required": {
   "type": "string"
  },
  "properties": {
   "type": "string"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "source": "https://stablecoins.llama.fi/stablecoins",
  "symbol": "USDC",
  "fetched_at": "2026-09-01T12:00:00.000Z",
  "circulating_usd": 62000000000
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/usdc-circulating-supply-all-chains-81ed666d/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from x402-seller-0ay3.onrender.com](https://www.zero.xyz/host/x402-seller-0ay3.onrender.com/llms.txt)