Pay-per-call audit log access on Base via x402 — $0.02/request in USDC.
What it does
This endpoint at lowpaymentfee.com provides access to audit log data (specifically log ID 21) via the x402 payment protocol. The endpoint is live and returns a 402 challenge requiring payment in USDC on the Base network. The price per request is $0.02 (20,000 base units of USDC with 6 decimals). No API keys or rate limits are required — callers simply attach an X-PAYMENT header with a valid x402 payment proof to access the resource.
The endpoint is part of a broader platform (lowpaymentfee.com) that offers multiple API categories including data & analytics, AI & machine learning, finance & Web3, and infrastructure utilities — all priced at $0.02 per request. This specific endpoint falls under an audit/logs path, suggesting it returns structured audit log records. The response MIME type is application/json. Payment is settled on the Base L2 network to address 0x1A2B...85F3 using USDC (contract 0x8335...2913).
Documentation on the site is extremely sparse — the docs, pricing, API, and README pages all render only a "Connect wallet" prompt with no substantive content. There is no OpenAPI schema, no request/response examples, and no description of what fields the audit log response contains. The platform advertises no API keys, no rate limits, and instant access, but the actual data returned by this endpoint is undocumented.
Capabilities
Use cases
- —Retrieving audit log records on a per-call payment basis without needing an API key
- —Integrating pay-per-use audit data into agent workflows that support x402
- —Accessing structured log data settled via USDC on Base L2
Fit
Best for
- —Agents or applications that need on-demand audit log access without subscription commitments
- —x402-compatible clients looking for low-cost per-request data endpoints
- —Developers experimenting with x402 payment protocol integrations
Not for
- —Bulk audit log retrieval where per-request pricing would be cost-prohibitive
- —Use cases requiring detailed API documentation or guaranteed SLAs
- —Users without USDC on Base network or x402-compatible payment infrastructure
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/audit/logs/21 \
-H "X-PAYMENT: <x402-payment-proof>" \
-H "Content-Type: application/json"Endpoint
Quality
The endpoint is live and returns a valid x402 402 challenge with clear pricing and network info. However, there is no OpenAPI schema, no request/response examples, no documentation of what the audit log endpoint actually returns, and the site's docs pages are empty. This is effectively a stub listing with only the payment challenge to go on.
Warnings
- —No documentation available — docs, pricing, API, and README pages all show only 'Connect wallet' with no content
- —No OpenAPI or schema describing request parameters or response fields for this audit log endpoint
- —The specific data returned by /api/v1/audit/logs/21 is completely undocumented
- —Cannot verify what 'audit logs' contain or whether the data is real/useful
Citations
- —Endpoint returns 402 with x402 challenge requiring USDC payment on Base networkhttps://lowpaymentfee.com/api/v1/audit/logs/21
- —Price is $0.02 per request (maxAmountRequired: 20000 base units of USDC, 6 decimals)https://lowpaymentfee.com/api/v1/audit/logs/21
- —Platform advertises no API keys, no rate limits, instant access, $0.02/request pricing across all endpointshttps://lowpaymentfee.com
- —USDC asset contract on Base: 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913https://lowpaymentfee.com/api/v1/audit/logs/21