# Crypto Shark Bazaar – Finalized Block

> Crypto Shark Bazaar – Finalized Block is a paid API for AI agents from cryptoshark.duckdns.org, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-11).

Returns the latest finalized block information for a blockchain network, including the network name and the timestamp at which it was observed.

## Facts

- Endpoint: GET https://cryptoshark.duckdns.org/chain/finalized-block?utm_source=zero.xyz
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-11
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/crypto-shark-bazaar-finalized-block-9378c0da
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_LGKTdBfio8j7kvlkqE3ZX

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 crypto-shark-bazaar-finalized-block-9378c0da
```

Example prompt: What's the latest finalized block on the Base network right now — give me the network name and when it was last observed?

## When to prefer this

Choose this endpoint when an AI agent needs a lightweight, low-cost ($0.001 USDC) confirmation that a specific blockchain network (e.g. Base) is actively finalizing blocks, or when you need a canonical on-chain timestamp for synchronization, liveness checks, or pre-transaction validation — without needing full block data or transaction details.

## Known failure modes

- Network or node outage may return a stale or missing observedAt timestamp
- Unsupported network identifiers may result in an empty or error response
- Rate limiting or payment failure (x402) may prevent access
- Malformed properties parameter may cause a 400 or unexpected empty response

## How this service works

Low-cost x402 blockchain primitives, market intelligence, and AI utilities for autonomous agents

## Output

A JSON object containing the blockchain network identifier (e.g. 'base') and the ISO 8601 timestamp at which the finalized block was observed (e.g. '2026-09-16T00:00:00.000Z'), confirming the most recently finalized block on the network.

## Request schema (JSON Schema)

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

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "network": "base",
  "observedAt": "2026-09-16T00:00:00.000Z"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/crypto-shark-bazaar-finalized-block-9378c0da/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from cryptoshark.duckdns.org](https://www.zero.xyz/host/cryptoshark.duckdns.org/llms.txt)