# Taifoon Blockchain Block Proof Verifier

> Taifoon Blockchain Block Proof Verifier is a paid API for AI agents from www.taifoon.io, paid per call via x402, $0.1/call, status unknown (last checked 2026-10-15).

Cryptographically verifies a specific block under the SuperRoot for a given blockchain chain ID and block number

## Facts

- Endpoint: POST https://www.taifoon.io/api/skills/proof-verify-v5?utm_source=zero.xyz
- Price: $0.1/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/taifoon-blockchain-block-proof-verifier-606ceb67
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_Fw3i7dVYNvJ3fBNS7Ulol

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 taifoon-blockchain-block-proof-verifier-606ceb67 -d '<json body>'
```

Example prompt: Can you verify block 52180190 on Base chain (chain ID 8453) using Taifoon's SuperRoot proof system?

## When to prefer this

Use this endpoint when you need cryptographic, SuperRoot-backed verification of a specific block on supported EVM chains (Base, Arc, Ethereum). Prefer this over generic RPC calls when you need a trustless proof rather than just block data, or when auditing block integrity in a trustless context.

## Known failure modes

- Invalid or non-existent block number for the specified chain — returns error indicating block not found
- Unsupported chain_id — returns error for chains not covered by the SuperRoot
- Block not yet finalized or too recent — proof may be unavailable
- Payment failure or insufficient USDC — request rejected before processing
- Network timeout or SuperRoot unavailability — service temporarily unreachable

## How this service works

Verify a block under the SuperRoot — chain 8453 block 51741679

## Output

Returns a cryptographic proof verification result indicating whether the specified block on the given chain is valid and attested under the SuperRoot, including block validity status and attestation details.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "chain_id": {
   "type": "integer",
   "description": "the chain (8453 Base, 5042 Arc, 1 Ethereum, …)"
  },
  "block_number": {
   "type": "integer",
   "description": "the block to prove"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "ok": true,
  "blob": {
   "finality": {},
   "superroot": {},
   "blockProof": {},
   "chainHeaders": [],
   "superrootProof": {}
  },
  "class": "proof.verify.v5",
  "chainId": 8453,
  "finality": {
   "type": 12,
   "finalizedBlockHash": "0x0316464742b8edb13c6f267b79b01b71d68f306139d2a95cb6c76683e616a2fc",
   "finalizedBlockNumber": 51741679
  },
  "blockHash": "0x0316464742b8edb13c6f267b79b01b71d68f306139d2a95cb6c76683e616a2fc",
  "receipt_id": "f0e1d2c3b4a5968778695a4b3c2d1e0f",
  "blockNumber": 51741679,
  "proofBlobUrl": "https://api.taifoon.dev/api/v5/proof/blob/8453/51741679",
  "superrootHash": "0xec7ce0f9a6eba253561c7845e550e0756fc8f795f8ecdf34aa65621a743b10f1"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/taifoon-blockchain-block-proof-verifier-606ceb67/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from www.taifoon.io](https://www.zero.xyz/host/www.taifoon.io/llms.txt)