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 on-chain USDC transfer activity across Base and Solana chains, exposing structured analytics through a suite of REST endpoints. Each data query endpoint is itself gated by an x402 micropayment ($0.01–$0.02 per call), making it a pay-per-query analytics service for the x402 ecosystem.
This specific endpoint — `/api/x402/wallets/{address}/transactions` — returns a paginated list of 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 lookback), and sorted by time or amount in ascending or descending order. Pagination supports up to 100 items per page.
Beyond wallet transaction lookups, the broader x402scan API offers merchant transaction and stats queries, buyer/seller leaderboards, facilitator analytics, a full-text resource search, and a registry for discovering and registering x402-protected resources. There is also a send endpoint for dispatching USDC on Base or Solana with dynamic pricing. The OpenAPI 3.1.0 spec is published and covers all endpoints with parameter schemas.
Capabilities
Use cases
- —Look up all x402 USDC transfers sent by a specific wallet address on Base or Solana
- —Analyze merchant revenue and buyer activity over configurable time windows
- —Discover and search the registry of x402-protected API resources
- —Monitor facilitator throughput and ecosystem-level transaction stats
- —Programmatically send USDC to an address on Base or Solana via the send endpoint
Fit
Best for
- —AI agents that need to audit their own x402 spending history
- —Developers building dashboards on top of x402 ecosystem data
- —Researchers analyzing adoption and volume trends in the x402 protocol
Not for
- —General-purpose blockchain explorers covering non-USDC or non-x402 transactions
- —Users who need free, unlimited access — every data call costs $0.01–$0.02
- —Querying non-x402 payment protocols or arbitrary ERC-20 token transfers
Quick start
# Fetch wallet transactions (requires x402 micropayment of $0.01)
curl -X GET \
'https://www.x402scan.com/api/x402/wallets/0x4Ac4E147A60a3035737fafBa1767D0767e69f2F5/transactions?page=0&page_size=10&chain=base&sort_by=time&sort_order=desc' \
-H 'X-Payment: <x402_payment_token>'Endpoint
Quality
Full OpenAPI 3.1.0 schema with clear parameter definitions and pricing metadata is available. However, the specific endpoint URL probed (/api/data/wallets/...) returned 404 — the canonical path per the OpenAPI spec is /api/x402/wallets/{address}/transactions. No response body examples are documented, and no dedicated docs page exists. The endpoint is likely live at the correct path but was probed at a legacy or incorrect URL.
Warnings
- —The probed URL uses /api/data/wallets/ but the OpenAPI spec defines the path as /api/x402/wallets/{address}/transactions — the listing endpoint may be a stale or incorrect URL.
- —Probe returned 404 on both GET and POST at the listed endpoint path; the endpoint is likely live at the /api/x402/ path variant instead.
- —No response schema or example responses are documented in the OpenAPI spec.
- —No dedicated documentation page found (/docs returns 404).
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 per call via x402 micropayment; resource search costs $0.02https://www.x402scan.com
- —Wallet transactions endpoint returns paginated transfers where wallet is sender, filterable by chain (base/solana), timeframe, and sortable by time or amounthttps://www.x402scan.com
- —OpenAPI 3.1.0 spec defines the canonical path as /api/x402/wallets/{address}/transactionshttps://www.x402scan.com
- —The send endpoint supports sending USDC on Base or Solana with dynamic pricing up to $1000https://www.x402scan.com
- —Registry write endpoints require SIWX wallet authenticationhttps://www.x402scan.com