Pay-per-call audit log endpoint on Base via x402 — $0.02 per request in USDC.
What it does
This x402-enabled endpoint at `/api/v1/audit/logs/4` is part of the lowpaymentfee.com platform, which offers a broad catalog of pay-per-request APIs spanning data analytics, AI/ML inference, finance, crypto, and utility services. All endpoints use the x402 payment protocol, settling in USDC on the Base network at $0.02 per request with no API keys, rate limits, or subscriptions required.
The specific endpoint probed (`/api/v1/audit/logs/4`) is listed as "Premium API Access" and returns a valid x402 challenge with a maxAmountRequired of 20,000 base units of USDC (0.02 USD, since USDC uses 6 decimals). The payment scheme is "exact" on the Base network, paying to address `0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3`. The endpoint accepts POST requests and returns `application/json`.
Documentation beyond the landing page is extremely sparse — the /docs, /pricing, /api, and /README pages all render only a "Connect wallet" prompt with no additional technical detail. There is no OpenAPI spec, no request/response schema documentation, and no examples of what the audit logs endpoint actually returns. The endpoint name and path suggest it retrieves or creates audit log entries, but the exact input parameters and response format are unknown.
Capabilities
Use cases
- —Retrieving or posting audit log entries via a single micropayment per call
- —Integrating pay-per-use audit logging into agent workflows without managing API keys
- —Testing x402 payment protocol integrations with a low-cost endpoint
Fit
Best for
- —Developers experimenting with x402 payment-gated APIs
- —Agents needing keyless, pay-per-call access to audit data
- —Projects that want to avoid subscription commitments for occasional API usage
Not for
- —Production audit logging requiring guaranteed SLAs and documented schemas
- —Use cases needing bulk/batch audit log retrieval at scale
- —Anyone requiring detailed API documentation before integration
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/audit/logs/4 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-token>"Endpoint
Quality
The endpoint is live and returns a valid x402 challenge with clear pricing, but there is no OpenAPI spec, no request/response schema, and no documentation beyond a landing page listing. The actual functionality of the audit logs endpoint is undocumented and must be guessed from the URL path.
Warnings
- —No OpenAPI or schema documentation available — input parameters and response format are completely unknown
- —All documentation pages (/docs, /pricing, /api, /README) render only a 'Connect wallet' prompt with no content
- —The specific purpose and data returned by /api/v1/audit/logs/4 is unclear — 'Premium API Access' is a generic label
- —The broader platform lists many endpoint categories (AI, finance, etc.) but none have documented schemas
Citations
- —The endpoint returns a 402 x402 challenge with maxAmountRequired of 20000 base units of USDC on Base networkhttps://lowpaymentfee.com/api/v1/audit/logs/4
- —All APIs are priced at $0.02 per request with no API keys, rate limits, or minimumshttps://lowpaymentfee.com
- —The platform offers endpoints across Data & Analytics, AI & ML, Finance & Web3, and Infrastructure categorieshttps://lowpaymentfee.com
- —USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913https://lowpaymentfee.com/api/v1/audit/logs/4