# x402 Bazaar: Base Chain Status Snapshot

> x402 Bazaar: Base Chain Status Snapshot is a paid API for AI agents from api.relai.fi, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-12).

Returns live Base chain data including latest block, base fee, priority fee, current ETH price, and estimated USD cost of a simple ETH transfer

## Facts

- Endpoint: POST https://api.relai.fi/relay/1782567677091/api/x402/chain-status?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-12
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/x402-bazaar-base-chain-status-snapshot-d7d22763
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_AHXwdaZXr9RsuUl6wcIeF

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 x402-bazaar-base-chain-status-snapshot-d7d22763 -d '<json body>'
```

Example prompt: Check the current gas fees and ETH price on Base right now — I want to know if it's a good time to send a transaction and what it'll cost me in dollars.

## When to prefer this

Use this endpoint when an AI agent needs to time or budget a Base chain transaction — specifically when the agent must decide whether current gas costs are acceptable before submitting, or when it needs to convert gas costs to USD for budget checks. Prefer this over generic ETH price feeds when you need gas fee data alongside price in one call on Base specifically.

## Known failure modes

- 402 Payment Required: endpoint returns payment requirements; agent must pay $0.005 USDC on Base to 0x973a31858f4d2125f48c880542da11a2796f12d6 and retry
- Network or upstream RPC unavailability may cause stale or missing block data
- Payment verification failure if USDC transfer is malformed or underpaid
- Rate limiting or relay infrastructure errors returning 5xx

## How this service works

Live Base chain snapshot: latest block, base fee + priority fee (Gwei), current ETH price, and the estimated USD cost of a simple ETH transfer. For agents timing or budgeting transactions. Paid via x402: $0.005 in USDC on Base (eip155:8453) to 0x973a31858f4d2125f48c880542da11a2796f12d6. Returns 402 with payment requirements; pay and retry.

## Output

A structured snapshot of the Base chain at query time, including: the latest block number, current base fee in Gwei, current priority fee in Gwei, the spot ETH/USD price, and the estimated total USD cost of executing a simple ETH transfer at current network conditions.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "pathParams": {
     "type": "object"
    },
    "queryParams": {
     "type": "object",
     "properties": {}
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/x402-bazaar-base-chain-status-snapshot-d7d22763/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.relai.fi](https://www.zero.xyz/host/api.relai.fi/llms.txt)