# Phantom API — SEI Transaction History

> Phantom API — SEI 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 SEI blockchain network, with filtering by block range, address, category, and metadata options.

## Facts

- Endpoint: POST https://phantom-api-omega.vercel.app/api/sei/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-sei-transaction-history-427b5639
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_Xz5y5ojmlJwIWT7F3QFPh

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-sei-transaction-history-427b5639 -d '<json body>'
```

Example prompt: Pull the last 25 transactions on the SEI blockchain for address sei1abc...xyz, sorted newest first, and include full metadata — skip any zero-value transfers.

## When to prefer this

Choose this endpoint when you need transaction history specifically on the SEI blockchain network, want fine-grained filtering by address, block range, category, or ordering, and require paginated access to large result sets. It is ideal for wallet auditing, portfolio tracking, and on-chain analytics on SEI. If you need data from other chains (e.g. Ethereum, Solana), use a sibling endpoint for that network.

## Known failure modes

- Invalid or malformed SEI address returns an error or empty result
- Block range out of bounds or non-existent blocks return empty results
- Exceeding maxCount limits may truncate results
- Invalid pageKey causes pagination failure
- Missing required address fields may result in overly broad or rejected queries
- Network congestion or node unavailability may cause timeout
- Payment failure via x402 protocol returns 402 status

## 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

Returns a paginated list of SEI blockchain transactions matching the query filters, including transaction hashes, block numbers, sender/receiver addresses, values, categories, and optional metadata. A pageKey cursor is provided for fetching subsequent pages.

## 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-sei-transaction-history-427b5639/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)