# EIP-4844 Blob Gas Market Oracle

> EIP-4844 Blob Gas Market Oracle is a paid API for AI agents from x402.professorsausages.com, paid per call via x402, $0.002/call, status unknown (last checked 2026-09-14).

Returns current EIP-4844 blob-gas market data for a given Ethereum-compatible chain, including blob base fee, cost per blob, and ETH/USD price.

## Facts

- Endpoint: GET https://x402.professorsausages.com/gas-oracle/:chain/blob
- Price: $0.002/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/eip-4844-blob-gas-market-oracle-547bd27d
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_xcQG4nC6bKEdSb9qqj7PH

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 eip-4844-blob-gas-market-oracle-547bd27d
```

Example prompt: What's the current blob base fee and cost per blob on Ethereum mainnet right now, including the ETH/USD rate being used?

## When to prefer this

Use this endpoint when you need real-time EIP-4844 blob gas market data — specifically blob base fee, cost per blob, and ETH/USD conversion — for Ethereum L1 or compatible chains. Prefer this over generic gas oracles when blob-specific pricing (not regular transaction gas) is the primary concern, e.g. for rollup operators, data availability cost estimation, or blob submission timing.

## Known failure modes

- Unsupported or unknown chain identifier returns an error
- Network latency or RPC node issues may cause stale or failed data
- Chain not yet supporting EIP-4844 blobs returns an error or empty data
- Rate limiting or payment failure returns 402 or 429

## How this service works

EIP-4844 blob-gas market (Ethereum L1)

## Output

Returns a JSON object with the chain name, current block number, blob base fee (as an object with units), cost per blob (in ETH and USD), blob gas used ratio, ETH/USD price, and a fetchedAt timestamp — giving a complete snapshot of the EIP-4844 blob gas market at query time.

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/eip-4844-blob-gas-market-oracle-547bd27d/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from x402.professorsausages.com](https://www.zero.xyz/host/x402.professorsausages.com/llms.txt)