# Keyring Agent Supply USDC

> Keyring Agent Supply USDC is a paid API for AI agents from keyring-agent.blockchhub.link, paid per call via x402, $0.1/call, status unknown (last checked 2026-10-12).

Returns USDC supply or liquidity information from a DeFi assistant endpoint

## Facts

- Endpoint: GET https://keyring-agent.blockchhub.link/api/supply-usdc?utm_source=zero.xyz
- Price: $0.1/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-12
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/keyring-agent-supply-usdc-4cae6e3f
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_0xUPFXm0VBslKImfcMl7n

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 keyring-agent-supply-usdc-4cae6e3f
```

Example prompt: What is the current USDC supply available through the Keyring Agent DeFi assistant?

## When to prefer this

Use this endpoint when you need a quick lookup of USDC supply or liquidity data via a paid DeFi assistant. It is suited for lightweight, low-cost queries about stablecoin supply status in a DeFi context, particularly when integrated into x402-payment-enabled agent workflows.

## Known failure modes

- Missing or malformed required parameters may return an error
- Service unavailability or network issues on blockchhub.link domain
- Payment of 0.01 USDC not fulfilled leading to 402 rejection
- Empty or minimal response if supply data is unavailable
- Unknown schema may yield unparseable or unexpected JSON

## How this service works

Pay the supply-usdc execution fee (supply USDC to a lending market)

## Output

Returns a JSON object with a status field (e.g. 'ok') and likely USDC supply metrics or liquidity figures relevant to DeFi operations.

## Request schema (JSON Schema)

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

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "status": "ok"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/keyring-agent-supply-usdc-4cae6e3f/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from keyring-agent.blockchhub.link](https://www.zero.xyz/host/keyring-agent.blockchhub.link/llms.txt)