# SYNTHORA EIP-4844 Blob Fee & Gas Stats

> SYNTHORA EIP-4844 Blob Fee & Gas Stats is a paid API for AI agents from eip4844-blob-fee-stats.hergertsynthora.com, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-15).

Returns aggregate EIP-4844 blob economics from Blobscan including average blob fee, blob gas price, blob-as-calldata fee comparison, average blob usage size, and totals.

## Facts

- Endpoint: POST https://eip4844-blob-fee-stats.hergertsynthora.com/service
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/synthora-eip-4844-blob-fee-gas-stats-23012c54
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_PPfLIKlJUS1iMmHS6McJG

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 synthora-eip-4844-blob-fee-gas-stats-23012c54 -d '<json body>'
```

Example prompt: What are the current EIP-4844 blob fee stats from Blobscan — give me the average blob fee, blob gas price, total blobs posted, and whether posting as a blob is cheaper than calldata right now?

## When to prefer this

Choose this endpoint when an agent needs aggregate EIP-4844 blob economics in a single call — especially for rollup cost planning, L2 data-availability decision-making, or comparing blob vs calldata costs. Prefer over building custom Blobscan integrations when you need pre-aggregated stats (avg fee, total blobs, total size) rather than per-blob transaction details. Ideal for autonomous agents making real-time posting decisions.

## Known failure modes

- Blobscan API unavailable upstream — may return stale or empty result fields
- updated_at may be empty string if stats have not yet been populated
- Numeric fields returned as strings (e.g. avg_blob_fee:'0') may indicate no data ingested yet
- Payment failure (402) if USDC payment is not properly attached to the x402 request
- Malformed payload may result in error response

## How this service works

Returns aggregate EIP-4844 blob economics from Blobscan: average blob fee, blob gas price, blob-as-calldata fee comparison, average blob usage size and totals. Powers autonomous rollup and L2 data-availability agents plus agent-to-agent cost planners deciding when to post blobs versus calldata. First 3 calls FREE per wallet — send header X-WALLET: 0x<addr>. No charge on upstream failure.

## Output

A JSON object with ok:true, the niche identifier, and a result object containing: updated_at timestamp, total_blobs count, avg_blob_fee (string), total_blob_fee (string), and total_blob_size (string) — plus provenance showing the upstream Blobscan API source.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "keys": {
   "type": "string",
   "description": "keys"
  },
  "caller": {
   "type": "string",
   "description": "caller"
  },
  "payload": {
   "type": "string",
   "description": "payload"
  },
  "provides": {
   "type": "string",
   "description": "provides"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "ok": true,
  "niche": "eip4844-blob-fee-stats",
  "result": {
   "updated_at": "",
   "total_blobs": 0,
   "avg_blob_fee": "0",
   "total_blob_fee": "0",
   "total_blob_size": "0"
  },
  "provenance": {
   "url": "https://api.blobscan.com/stats/overall",
   "source": "EIP-4844 Blob Fee & Gas Stats"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/synthora-eip-4844-blob-fee-gas-stats-23012c54/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from eip4844-blob-fee-stats.hergertsynthora.com](https://www.zero.xyz/host/eip4844-blob-fee-stats.hergertsynthora.com/llms.txt)