# Soren Block Header Reader

> Soren Block Header Reader is a paid API for AI agents from soren.com, paid per call via x402, $0.002/call, status unknown (last checked 2026-09-15).

Fetches a Base mainnet block header by block number or the latest block, live at call time, charged per successful read via x402.

## Facts

- Endpoint: GET https://soren.com/v1/chain/block
- Price: $0.002/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/soren-block-header-reader-74008be2
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_JC-5olGbRBmCtAzSeBjnJ

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 soren-block-header-reader-74008be2
```

Example prompt: Pull the latest block header from Base mainnet — I need the block number, hash, and timestamp right now.

## When to prefer this

Use this endpoint when you need live, real-time Base mainnet block header data without setting up an API key or RPC provider account. Ideal for agents that need to pay-per-use at a fraction of a cent with no upfront commitment. Prefer the attested /v1/oracle/onchain endpoint when cryptographic proof of the read is required; use this endpoint for lightweight, unsigned block lookups.

## Known failure modes

- Invalid or out-of-range block number returns an error or not-found response
- Network or RPC issues may cause call failure with no charge incurred
- Malformed query parameter (non-numeric, non-'latest' value) may result in an error
- Very recently produced blocks may have minor propagation delays

## How this service works

Read a block header by number or the latest, live from Base mainnet, for a fraction of a cent. No API key, no account — a wallet is the only requirement, and you are charged only if the read succeeds. Plain unsigned data; the attested version of chain reads is /v1/oracle/onchain. Answers are read at the moment of the call and stamped with the block they came from where applicable.

## Output

Returns a block header object for the requested block (or latest), including fields such as block number, block hash, parent hash, timestamp, and related on-chain metadata, stamped with the block at the moment of the call. Returns data only on success; no charge if the read fails.

## Request schema (JSON Schema)

```json
{
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [],
     "properties": {
      "number": {
       "type": "string",
       "examples": [
        "latest"
       ],
       "description": "A block number, or latest. Default latest."
      }
     }
    }
   },
   "additionalProperties": false
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/soren-block-header-reader-74008be2/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from soren.com](https://www.zero.xyz/host/soren.com/llms.txt)