# Phantom API — Monad Transaction History

> Phantom API — Monad Transaction History is a paid API for AI agents from phantom-api-omega.vercel.app, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-14).

Retrieves paginated transaction history for addresses on the Monad blockchain network, with filtering by block range, category, and address.

## Facts

- Endpoint: POST https://phantom-api-omega.vercel.app/api/monad/tx/history
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/phantom-api-monad-transaction-history-918420c4
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_Nb4ytCUsrSU0RmqiK0S3g

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 phantom-api-monad-transaction-history-918420c4 -d '<json body>'
```

Example prompt: Pull me the last 25 transactions received by Monad address 0xABC123... in descending order, including metadata, starting from block 100000.

## When to prefer this

Use this endpoint when you need historical transaction data specifically on the Monad blockchain network. Prefer it when you need paginated, filterable access to on-chain activity including block-range filtering, address-specific queries, and category-based filtering. It is pay-per-call with no subscription required, making it cost-effective for sporadic lookups.

## Known failure modes

- Invalid address format returns a 400 error
- fromBlock greater than toBlock results in empty or error response
- Unsupported category enum value causes validation error
- Exceeding maxCount limits may result in truncated or error response
- Missing required address fields may return empty result set
- Payment failure via x402 protocol blocks access with 402 response

## How this service works

Lightning-fast access to blockchain data, smart contract insights, and Web3 infrastructure across 57+ networks. Pay-per-call via x402.

## Output

A paginated list of transactions on the Monad network matching the query filters, optionally including metadata such as token transfers, block timestamps, and value details. Returns a pageKey for fetching subsequent pages when more results exist.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "order": {
   "enum": [
    "asc",
    "desc"
   ],
   "type": "string"
  },
  "pageKey": {
   "type": "string"
  },
  "toBlock": {
   "type": "string"
  },
  "category": {
   "type": "array",
   "items": {
    "type": "string"
   }
  },
  "maxCount": {
   "type": "number"
  },
  "fromBlock": {
   "type": "string"
  },
  "toAddress": {
   "type": "string"
  },
  "fromAddress": {
   "type": "string"
  },
  "withMetadata": {
   "type": "boolean"
  },
  "excludeZeroValue": {
   "type": "boolean"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/phantom-api-monad-transaction-history-918420c4/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from phantom-api-omega.vercel.app](https://www.zero.xyz/host/phantom-api-omega.vercel.app/llms.txt)