# httpay.xyz BaseScan Base Chain Explorer API Gateway

> httpay.xyz BaseScan Base Chain Explorer API Gateway is a paid API for AI agents from httpay.xyz, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-15).

Proxies requests to the BaseScan block explorer API for the Base blockchain chain, enabling querying of transactions, addresses, tokens, and contract data on Base.

## Facts

- Endpoint: POST https://httpay.xyz/api/gateway/basescan/%7B*path%7D/*
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/httpay-xyz-ec870619
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_bCxU1fKCT7qaBNafCfwR8

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 httpay-xyz-ec870619 -d '<json body>'
```

Example prompt: Can you look up the token transfer history for wallet address 0xAbC123... on the Base blockchain using BaseScan — specifically fetch all ERC-20 transfers in the last 1000 blocks?

## When to prefer this

Use this endpoint when you need to query on-chain data specifically from the Base blockchain via the BaseScan explorer API, and want a pay-per-call gateway without managing your own BaseScan API key. Prefer this over raw RPC endpoints when you need explorer-specific data like token transfers, verified contract ABIs, event logs, or address transaction history that isn't available via standard JSON-RPC.

## Known failure modes

- Invalid or malformed API path returns 400 error
- BaseScan API rate limits exceeded returns 429
- Unknown address or transaction hash returns empty result set
- BaseScan API key issues (gateway-level) return 401 or 403
- Network congestion or BaseScan downtime returns 503
- Invalid query parameters return BaseScan error object

## How this service works

API Gateway: BaseScan Base chain explorer API

## Output

Returns BaseScan API JSON responses containing on-chain data such as transaction records, address balances, token transfers, contract ABIs, event logs, and block information for the Base blockchain.

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/httpay-xyz-ec870619/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from httpay.xyz](https://www.zero.xyz/host/httpay.xyz/llms.txt)