Query x402 protocol wallet transactions, merchant stats, and resource registry via micropayment-gated API.
What it does
x402scan is a payment data explorer and registry for the x402 protocol, built by Merit Systems. It indexes USDC transfer activity across Base and Solana chains, exposing analytics on wallets, merchants, facilitators, and registered x402 resources through a suite of REST endpoints. Each data query costs $0.01–$0.02 in USDC via the x402 micropayment protocol.
This specific endpoint — `/api/x402/wallets/{address}/transactions` — returns a paginated list of x402 transfers where the specified wallet address is the sender. Results can be filtered by chain (Base or Solana), timeframe (1, 7, 14, or 30 days), and sorted by time or amount in ascending or descending order. Pagination supports up to 100 items per page.
The broader x402scan API also offers wallet aggregate stats, merchant transaction histories and stats, facilitator analytics, a full-text resource search, and a registry for discovering and registering x402-protected endpoints. Registry write operations use SIWX wallet authentication and are free; all read/data endpoints require an x402 micropayment. A separate send endpoint allows transferring USDC to any address on Base or Solana with dynamic pricing up to $1,000.
Capabilities
Use cases
- —Retrieve outbound USDC transfer history for a specific wallet address on Base or Solana
- —Audit x402 protocol spending by an AI agent wallet over a given timeframe
- —Build dashboards tracking x402 ecosystem payment flows
- —Discover which merchants a wallet has paid via x402
Fit
Best for
- —Agents needing to audit their own x402 spending history
- —Developers building analytics on x402 protocol activity
- —Monitoring outbound USDC transfers from a specific address
Not for
- —General-purpose blockchain explorers covering non-USDC tokens or non-x402 transfers
- —Real-time streaming of on-chain events (this is a paginated REST API)
- —Querying inbound transactions to a wallet (use the merchant transactions endpoint instead)
Quick start
curl -X GET \
'https://www.x402scan.com/api/x402/wallets/0x57329Bdaf54708964f33A253aE1A5De00a96aaea/transactions?page=0&page_size=10&chain=base&sort_by=time&sort_order=desc' \
-H 'X-Payment: <x402_payment_token>'Endpoint
Quality
The OpenAPI spec is detailed with clear parameter definitions, pricing info, and endpoint descriptions. However, the specific endpoint URL probed returned 404 (the path uses /api/data/wallets/ instead of the documented /api/x402/wallets/), no response schema is provided, and no example responses are available. The endpoint URL in the listing may be incorrect relative to the live API.
Warnings
- —The probed endpoint URL (/api/data/wallets/.../transactions) returned 404 on both GET and POST. The OpenAPI spec documents the path as /api/x402/wallets/{address}/transactions instead — the listing URL may be wrong.
- —No response schema is documented in the OpenAPI spec; response structure must be inferred.
- —No example responses are available from probe or crawl data.
Citations
- —x402scan is a payment data explorer and registry for the x402 protocol, built by Merit Systemshttps://www.x402scan.com
- —Data endpoints cost $0.01–$0.02 each via x402 micropaymenthttps://www.x402scan.com
- —Wallet transactions endpoint returns paginated transfers where wallet is sender, filterable by chain, timeframe, sortable by time or amounthttps://www.x402scan.com
- —Supports Base and Solana chainshttps://www.x402scan.com
- —Registry write endpoints use SIWX wallet authentication and are freehttps://www.x402scan.com
- —Send endpoint supports dynamic pricing up to $1,000https://www.x402scan.com