# Prysm CoinMarketCap Provider

> Prysm CoinMarketCap Provider is a paid API for AI agents from prysm-kappa.vercel.app, paid per call via x402, $0.08/call, status unknown (last checked 2026-09-14).

Fetches cryptocurrency market data (e.g. price quotes) from CoinMarketCap via Prysm's x402-gated API gateway on Base mainnet, paid in USDC.

## Facts

- Endpoint: POST https://prysm-kappa.vercel.app/api/v1/providers/coinmarketcap
- Price: $0.08/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/prysm-coinmarketcap-provider-2bc198d4
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_RXIrFq2polaBdKymtgdUY

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 prysm-coinmarketcap-provider-2bc198d4 -d '<json body>'
```

Example prompt: Pull the latest price quote for Bitcoin and Ethereum from CoinMarketCap using the quotes operation — I want current USD prices for both.

## When to prefer this

Choose this endpoint when you need real-time or near-real-time CoinMarketCap data within an x402-enabled, crypto-native agent workflow paying with USDC on Base. It's ideal for agents that already operate on-chain and want a single metered API gateway to CoinMarketCap without managing a separate API key.

## Known failure modes

- Payment failure via x402 if wallet has insufficient USDC on Base mainnet
- Invalid or unsupported operation name returns an error
- Malformed input parameters cause provider-level errors
- CoinMarketCap API rate limits or downtime propagate as upstream errors
- Unsupported cryptocurrency symbol returns empty or error data

## How this service works

Prysm sells paid, agent-ready provider capabilities over x402 on Base mainnet using USDC.

## Output

A JSON object containing the CoinMarketCap data payload for the requested operation (e.g. price quotes, market cap, volume), keyed under 'data', along with the provider name ('coinmarketcap') and operation name used.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "input": {
   "type": "object",
   "description": "Provider-specific operation parameters.",
   "additionalProperties": true
  },
  "operation": {
   "type": "string",
   "description": "Allowlisted operation for the selected provider."
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "data": {},
  "provider": "coinmarketcap",
  "operation": "quotes"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/prysm-coinmarketcap-provider-2bc198d4/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from prysm-kappa.vercel.app](https://www.zero.xyz/host/prysm-kappa.vercel.app/llms.txt)