# ScriptMasterLabs Stablecoin Market Cap API

> ScriptMasterLabs Stablecoin Market Cap API is a paid API for AI agents from acp-x402-scriptmasterlabs.onrender.com, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-14).

Returns current stablecoin market capitalization data, payable per-call in USDC on Base via x402 protocol

## Facts

- Endpoint: GET https://acp-x402-scriptmasterlabs.onrender.com/x402/stablecoin-mcap?utm_source=zero.xyz
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/scriptmasterlabs-stablecoin-market-cap-api-dce9e7f9
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_j_s4A6mLTlMoq6QDEoJBm

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 scriptmasterlabs-stablecoin-market-cap-api-dce9e7f9
```

Example prompt: What is the current total market cap of stablecoins? I need the latest figures including major stablecoins like USDC and USDT.

## When to prefer this

Choose this endpoint when you need stablecoin market cap data and are operating in a pay-per-call, micropayment-settled environment using the x402 protocol on Base. It is well-suited for agents that need on-demand financial data without a subscription, paying only $0.001 USDC per call. Less appropriate when you need free-tier access, real-time streaming, or when your infrastructure does not support x402 payment headers.

## Known failure modes

- Payment not settled — returns HTTP 402 if USDC micropayment via x402 is not included or insufficient
- No input parameters matched — returns empty or error response if query params are malformed
- Service unavailable — hosted on Render free tier, may experience cold starts or downtime
- Rate limiting — excessive calls may be throttled
- Stale data — market cap data may not be real-time if upstream source is delayed

## How this service works

Pay-per-call crypto, RWA, federal, SEC, and compliance APIs. Settled in USDC on Base via x402. Hyphen routes only (e.g. /x402/rwa-aggregates, /x402/gas-tracker).

## Output

Returns stablecoin market capitalization data including aggregate or per-stablecoin market cap figures in USD, reflecting current on-chain and market data for major stablecoins.

## Request schema (JSON Schema)

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

## Response schema (JSON Schema)

```json
{
 "example": {}
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/scriptmasterlabs-stablecoin-market-cap-api-dce9e7f9/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from acp-x402-scriptmasterlabs.onrender.com](https://www.zero.xyz/host/acp-x402-scriptmasterlabs.onrender.com/llms.txt)