Pay-per-call audit log access on Base via x402 — $0.02 per request in USDC.
What it does
This endpoint at lowpaymentfee.com provides premium API access to audit log data (specifically log entry #47) via the x402 payment protocol. It accepts POST requests and returns JSON. Payment is settled on the Base network using USDC (contract 0x8335…2913) with an exact-scheme challenge requiring up to 20,000 base units (i.e., $0.02 per call, since USDC uses 6 decimals).
The broader lowpaymentfee.com platform advertises a suite of endpoints spanning data & analytics, AI & machine learning (sentiment analysis, summarization, classification, embeddings), finance & Web3 (price feeds, exchange rates, token quotes, gas estimates), and infrastructure utilities (geocoding, validation, conversion, generation). All endpoints are listed at $0.02 per request with no API keys, no rate limits, and no minimum commitments. However, this specific listing covers only the `/api/v1/audit/logs/47` resource.
Documentation is extremely sparse — the docs, pricing, and API pages all render only a "Connect wallet" prompt with no further technical detail. There is no OpenAPI spec, no request/response schema beyond the x402 challenge's outputSchema stub, and no example payloads. The endpoint is confirmed live (returns a valid 402 challenge), but the actual data returned after payment is unknown.
Capabilities
Use cases
- —Retrieving audit log entries on a per-call payment basis without needing an API key
- —Programmatic access to audit data settled via USDC on Base L2
- —Agent-driven workflows that need to purchase individual data records via x402
Fit
Best for
- —Developers or agents wanting keyless, pay-per-use audit log access
- —x402-compatible wallets and agent frameworks on Base
- —Low-volume, on-demand data retrieval without subscription commitments
Not for
- —High-volume bulk audit log exports (no documented batch endpoint)
- —Users who need detailed API documentation or response schemas before purchasing
- —Non-crypto users who cannot settle payments in USDC on Base
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/audit/logs/47 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-token>"Endpoint
Quality
The endpoint is confirmed live via a valid 402 challenge, but there is virtually no documentation: no OpenAPI spec, no request/response examples, no description of what 'audit/logs/47' actually returns. Docs pages render only 'Connect wallet'. Pricing is clear ($0.02) but everything else must be inferred.
Warnings
- —No OpenAPI or schema documentation available — actual request body and response format are unknown.
- —All documentation pages (docs, pricing, API, README) render only 'Connect wallet' with no content.
- —The specific resource '/api/v1/audit/logs/47' is not listed on the homepage's API catalog — it may be an unlisted or test endpoint.
- —No examples of successful responses exist in the crawl material.
Citations
- —Endpoint returns a valid x402 402 challenge with maxAmountRequired of 20000 base units in USDC on Basehttps://lowpaymentfee.com/api/v1/audit/logs/47
- —All endpoints priced at $0.02 per request with no API keys, no rate limits, instant access on Base networkhttps://lowpaymentfee.com
- —USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913https://lowpaymentfee.com/api/v1/audit/logs/47