# Orders of Magnitude Crypto Market Cap API

> Orders of Magnitude Crypto Market Cap API is a paid API for AI agents from x402-api-production-5133.up.railway.app, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-15).

Returns cryptocurrency market capitalization data for the broader crypto market, priced at $0.01 USDC per call via x402 payment protocol

## Facts

- Endpoint: GET https://x402-api-production-5133.up.railway.app/data/crypto-market-cap?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/orders-of-magnitude-crypto-market-cap-api-6803dfac
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_3hg6PQ-XINQTlRGIFD23o

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 orders-of-magnitude-crypto-market-cap-api-6803dfac
```

Example prompt: What's the current total cryptocurrency market cap? Pull the latest data from the Orders of Magnitude crypto market cap endpoint.

## When to prefer this

Choose this endpoint when you need a quick, low-cost ($0.01 USDC) snapshot of the total cryptocurrency market capitalization and you are operating within an x402-compatible payment infrastructure. It is best suited for agents that need macro-level crypto market size data rather than per-coin prices or detailed token-level analytics.

## Known failure modes

- Payment failure if x402 USDC payment is not properly submitted (402 Payment Required)
- Empty or schema-less response object if market data source is unavailable
- Invalid format parameter may result in unexpected response structure
- Service downtime on Railway deployment could cause 503 errors
- Rate limiting or payment processing delays under high load

## How this service works

Data and AI services via x402 payment protocol

## Output

Returns an object containing total cryptocurrency market capitalization figures and related market statistics. The response format can be controlled via the 'format' query parameter. Data reflects the aggregated market cap across major cryptocurrencies.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "format": {
   "type": "string",
   "description": "Response format"
  }
 }
}
```

## Response schema (JSON Schema)

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

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/orders-of-magnitude-crypto-market-cap-api-6803dfac/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from x402-api-production-5133.up.railway.app](https://www.zero.xyz/host/x402-api-production-5133.up.railway.app/llms.txt)