# PulseScanner Head Lane Transaction Lookup

> PulseScanner Head Lane Transaction Lookup is a paid API for AI agents from x402.pulsescanner.io, paid per call via x402, $0.003/call, status unknown (last checked 2026-10-22).

Retrieves a single transaction from the PulseChain head preview lane, ahead of the indexed blockchain head, by transaction hash.

## Facts

- Endpoint: GET https://x402.pulsescanner.io/v2/head/txs/:hash?utm_source=zero.xyz
- Price: $0.003/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-22
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/pulsescanner-head-lane-transaction-lookup-a6760c55
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_6vwScu5g58QB7odn4h3iY

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 pulsescanner-head-lane-transaction-lookup-a6760c55
```

Example prompt: Can you pull up the details for PulseChain transaction 0xabc123...def on the head preview lane, before it's been indexed?

## When to prefer this

Use this endpoint when you need to inspect a PulseChain transaction that is in the head preview lane and has not yet been indexed — ideal for real-time monitoring of fresh transactions, pre-confirmation checks, or scenarios where indexing lag matters. Prefer the standard indexed transaction endpoint if the transaction is expected to already be in the indexed chain.

## Known failure modes

- Transaction hash not found in head lane (may already be indexed or not yet propagated)
- Invalid or malformed transaction hash returns an error
- Transaction exists in the standard indexed chain but not the head lane
- Network or upstream node unavailability causing lookup failure
- Payment failure or insufficient USDC balance for the $0.003 per-call fee

## How this service works

One transaction from the head preview lane, ahead of the indexed head. PulseChain (chain id 369). $0.003 USDC per call.

## Output

Returns details of a single PulseChain (chain ID 369) transaction from the head preview lane, ahead of the indexed blockchain head — including transaction-level data such as hash, status, value, gas, and decoded action, sourced from the pre-index lane.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET",
      "HEAD",
      "DELETE"
     ],
     "type": "string"
    },
    "headers": {
     "type": "object",
     "additionalProperties": {
      "type": "string"
     }
    },
    "pathParams": {
     "type": "object",
     "required": [
      "hash"
     ],
     "properties": {
      "hash": {
       "type": "string"
      }
     }
    },
    "queryParams": {
     "type": "object",
     "properties": {}
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/pulsescanner-head-lane-transaction-lookup-a6760c55/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from x402.pulsescanner.io](https://www.zero.xyz/host/x402.pulsescanner.io/llms.txt)