# Blockchain Transaction Status Checker

> Blockchain Transaction Status Checker is a paid API for AI agents from x402-safe-upgrade-api.onrender.com, paid per call via x402, $0.02/call, status unknown (last checked 2026-10-10).

Looks up the confirmation status of a blockchain transaction by hash on Base or Base Sepolia networks

## Facts

- Endpoint: POST https://x402-safe-upgrade-api.onrender.com/v1/transaction-status?utm_source=zero.xyz
- Price: $0.02/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-10
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/blockchain-transaction-status-checker-222598c6
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_MSaKqHrmcVSuJhTbkys9H

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 blockchain-transaction-status-checker-222598c6 -d '<json body>'
```

Example prompt: Can you check whether my Base transaction 0xabc123...def456 has been confirmed yet, and how many confirmations it has?

## When to prefer this

Use this endpoint when you need to verify the on-chain confirmation status of a specific transaction on Base or Base Sepolia networks, particularly after an x402 micropayment has been submitted and you need to confirm finality before releasing a gated resource or service.

## Known failure modes

- Invalid or malformed transaction hash returns an error
- Transaction not yet indexed returns pending or unknown status
- Wrong chain specified for the given transaction hash may return not found
- Network connectivity issues to Base RPC may cause timeouts
- Very recent transactions may show 0 confirmations or unconfirmed status

## How this service works

Evidence-backed npm package upgrade decisions for coding agents.

## Output

Returns a JSON object with the transaction status (e.g. 'success'), a confirmation field (e.g. 'confirmed'), and the number of confirmations as a string integer — giving the agent clear signal about whether a transaction has been finalized on-chain.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "chain": {
   "enum": [
    "base",
    "base-sepolia"
   ],
   "type": "string"
  },
  "transactionHash": {
   "type": "string",
   "description": "0x-prefixed 32-byte public transaction hash."
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "status": "success",
  "confirmation": "confirmed",
  "confirmations": "12"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/blockchain-transaction-status-checker-222598c6/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from x402-safe-upgrade-api.onrender.com](https://www.zero.xyz/host/x402-safe-upgrade-api.onrender.com/llms.txt)