# BaseBuilder Crypto CoinGecko Proxy

> BaseBuilder Crypto CoinGecko Proxy is a paid API for AI agents from bb-crypto.vercel.app, paid per call via x402, $0.114196/call, status unknown (last checked 2026-09-14).

Proxies CoinGecko cryptocurrency market data requests via a paid x402 micropayment-gated API endpoint

## Facts

- Endpoint: POST https://bb-crypto.vercel.app/api/coingecko
- Price: $0.114196/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/basebuilder-crypto-coingecko-proxy-0b7254f1
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_p_cGMIZMiUrXzFumR5ya9

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 basebuilder-crypto-coingecko-proxy-0b7254f1 -d '<json body>'
```

Example prompt: Can you pull the current price, market cap, and 24-hour trading volume for Bitcoin in USD from CoinGecko?

## When to prefer this

Choose this endpoint when you need CoinGecko market data but want a micropayment-gated proxy that integrates with x402 payment flows on Base, avoiding direct CoinGecko API key management. Useful for agents operating within x402-enabled payment infrastructure.

## Known failure modes

- Payment not accepted — 402 returned if USDC micropayment not included or insufficient
- Invalid coin ID or symbol returns empty or error response
- CoinGecko API rate limit or downtime causes upstream failure
- Malformed POST body results in 400 bad request
- Unsupported currency denomination returns no price data

## How this service works

BaseBuilder Crypto API hub - 26 paid endpoints

## Output

Returns CoinGecko market data for the requested cryptocurrency, typically including current price, market capitalization, 24-hour trading volume, price change percentages, circulating supply, and other coin metadata, depending on the CoinGecko endpoint proxied.

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/basebuilder-crypto-coingecko-proxy-0b7254f1/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from bb-crypto.vercel.app](https://www.zero.xyz/host/bb-crypto.vercel.app/llms.txt)