# Speer Cyber Defense — Base Blockchain Transaction Lookup

> Speer Cyber Defense — Base Blockchain Transaction Lookup is a paid API for AI agents from api.speercyberdefense.com, paid per call via x402, $0.003/call, status unknown (last checked 2026-09-14).

Retrieves intelligence and details for a specific Base blockchain transaction by its hash

## Facts

- Endpoint: GET https://api.speercyberdefense.com/v1/blockchain/tx/%7Bhash%7D
- Price: $0.003/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/speer-cyber-defense-base-blockchain-transaction-lookup-385fa2a4
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_GH8db7lgruTugl4KBh_aH

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 speer-cyber-defense-base-blockchain-transaction-lookup-385fa2a4
```

Example prompt: Can you look up the Base blockchain transaction 0x4f3a1b2c9d8e7f6a5b4c3d2e1f0a9b8c7d6e5f4a3b2c1d0e9f8a7b6c5d4e3f2 and tell me what happened — whether it succeeded, what was transferred, and any intelligence about it?

## When to prefer this

Choose this endpoint when you need on-chain intelligence about a specific Base blockchain transaction and want cybersecurity-aware analysis alongside standard transaction details. Prefer it over generic block explorers when you need structured JSON output consumable by an AI agent, or when investigating potentially suspicious transactions that may warrant security context. Pay-per-call micropayment model makes it cost-effective for occasional lookups without subscription overhead.

## Known failure modes

- Invalid or malformed transaction hash returns an error
- Transaction hash not found on Base network returns not-found error
- Network or RPC connectivity issues may return 503 (not billed)
- Transactions on other chains (not Base) may not be found

## How this service works

Cybersecurity micropayments API for AI agents — pay-per-call USDC on Base and Solana (x402 v2). Free utility services under /v1/free/* and gateway select under /v1/gateway/* (Public). Paid cybersecurity analysis, CVE/security news feeds, Base blockchain intelligence, network intel utilities, composite domain/URL reports, research, conversion, verification, and feeds. Failed security analyses are not billed (HTTP 503).

## Output

Returns a JSON object indicating success status, a tool/resource identifier, an 'ok' status flag, and a human-readable summary of the transaction. May include transaction details such as status, parties involved, amounts, and other on-chain intelligence about the Base blockchain transaction.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "properties": {
   "type": "string"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "ok": true,
  "tool": "resource",
  "status": "ok",
  "summary": "Completed"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/speer-cyber-defense-base-blockchain-transaction-lookup-385fa2a4/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.speercyberdefense.com](https://www.zero.xyz/host/api.speercyberdefense.com/llms.txt)