x402-gated premium API access on Base, pay $0.02 per request in USDC — no keys, no rate limits.
What it does
This endpoint at lowpaymentfee.com provides "Premium API Access" via the x402 payment protocol. The specific resource `/api/v1/accounts/157` is one of many endpoints offered by the platform, which spans data & analytics, AI & machine learning, finance & Web3, and infrastructure utility categories. All endpoints are priced at $0.02 per request, settled in USDC on the Base network.
The x402 challenge confirms the endpoint is live and accepts exact-scheme payments. The max amount required is 20,000 base units of USDC (0x8335…2913 on Base), which equals $0.02 given USDC's 6 decimals. Payments are sent to address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3 with a 300-second timeout. No API keys or rate limits are advertised — callers simply attach an X-PAYMENT header with a valid x402 payment proof.
The platform's landing page lists sibling endpoints for metrics, reports, data export, insights, sentiment analysis, text summarization, classification, embeddings, price feeds, exchange rates, token quotes, gas estimates, geocoding, validation, conversion, and generation. However, the specific functionality behind `/api/v1/accounts/157` is not documented beyond the label "Premium API Access." No OpenAPI schema, request/response examples, or detailed documentation were found in the crawl — the docs, API, pricing, and README pages all rendered only a "Connect wallet" prompt with no further content.
Capabilities
Use cases
- —Programmatic access to premium API resources with per-call USDC micropayments
- —Agent-driven workflows that need keyless, on-demand API access settled on Base
- —Exploring x402 payment protocol integration with a low-cost test endpoint
Fit
Best for
- —Developers experimenting with x402 payment flows
- —AI agents needing keyless pay-per-call API access
- —Users who want to avoid subscription commitments and pay only per request
Not for
- —Users who need detailed documentation or OpenAPI specs before integrating
- —High-volume consumers who would benefit from bulk pricing or subscriptions
- —Anyone without a Base-compatible USDC wallet
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/accounts/157 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-proof>"Endpoint
Quality
The endpoint is live and returns a valid x402 challenge with clear pricing, but there is no documentation, no OpenAPI schema, no request/response examples, and the specific functionality of /api/v1/accounts/157 is entirely opaque beyond the generic label 'Premium API Access.' The docs and other pages returned only wallet-connect prompts with no content.
Warnings
- —The specific functionality of /api/v1/accounts/157 is undocumented — it is unclear what data or service it provides.
- —No OpenAPI schema, request body format, or response examples are available.
- —All documentation pages (docs, API, pricing, README) rendered only a 'Connect wallet' prompt with no useful content.
- —The platform lists many endpoint categories (AI, finance, analytics, etc.) but none are documented in detail.
Citations
- —Endpoint returns HTTP 402 with x402 challenge, maxAmountRequired 20000 base units of USDC on Basehttps://lowpaymentfee.com/api/v1/accounts/157
- —Platform advertises $0.02 per request, no API keys, no rate limits, no minimumshttps://lowpaymentfee.com
- —USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913https://lowpaymentfee.com/api/v1/accounts/157
- —Platform lists endpoints across data & analytics, AI & ML, finance & Web3, and infrastructure categorieshttps://lowpaymentfee.com