Pay-per-call API platform on Base network via x402 — $0.02/request in USDC.
What it does
lowpaymentfee.com is an x402-enabled API platform that offers a broad catalog of pay-per-request endpoints spanning data analytics, AI/ML inference, finance/Web3 data, and utility services. All endpoints are priced at $0.02 per request, paid in USDC on the Base network with no API keys, rate limits, or upfront commitments required.
The specific endpoint at `/api/v1/generate/resource/80` is listed under "Premium API Access." The x402 challenge confirms it is live, accepting POST requests and settling payments in USDC (contract 0x8335…2913 on Base) with a max amount of 20,000 base units (i.e., $0.02 given USDC's 6 decimals). The payment scheme is "exact" with a 300-second timeout.
The broader platform advertises endpoints for sentiment analysis, text summarization, classification, embeddings, price feeds, exchange rates, token quotes, gas estimates, geocoding, validation, conversion, and generation. However, documentation pages (/docs, /pricing, /api, /README) all returned only a "Connect wallet" prompt with no substantive content, so the actual behavior, input/output schemas, and data sources behind these endpoints remain undocumented and unverifiable.
Capabilities
Use cases
- —Agents needing on-demand AI inference (sentiment, summarization, classification, embeddings) without API key management
- —Fetching real-time crypto token quotes, gas estimates, or exchange rates via micropayment
- —Running geocoding, validation, or data conversion utilities with per-call billing
Fit
Best for
- —AI agents that need keyless, pay-as-you-go access to diverse utility endpoints
- —Developers prototyping with low-cost per-request pricing and no commitments
- —Web3-native applications already operating on the Base network
Not for
- —High-volume production workloads where $0.02/request adds up significantly
- —Users who need detailed API documentation, SLAs, or guaranteed uptime
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/generate/resource/80 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-token>" \
-d '{}'Endpoint
Quality
The x402 challenge is live and confirms pricing and payment details, but all documentation pages return only 'Connect wallet' with no content. There is no OpenAPI spec, no input/output schema, no example requests or responses, and no description of what 'Premium API Access' at resource/80 actually returns. The listing is effectively a stub.
Warnings
- —All documentation pages (/docs, /pricing, /api, /README) returned no useful content — only a 'Connect wallet' prompt.
- —No OpenAPI spec or input/output schema is available for any endpoint.
- —The actual functionality of /api/v1/generate/resource/80 ('Premium API Access') is completely undocumented.
- —The broader catalog of 16+ endpoints is advertised but none have verifiable documentation or schemas.
- —Cannot confirm what data sources or models back the AI and finance endpoints.
Citations
- —All endpoints priced at $0.02/request with no API keys, rate limits, or minimumshttps://lowpaymentfee.com
- —Platform offers endpoints across Data & Analytics, AI & ML, Finance & Web3, and Infrastructure categorieshttps://lowpaymentfee.com
- —x402 challenge returns maxAmountRequired of 20000 base units in USDC on Base network with exact schemehttps://lowpaymentfee.com/api/v1/generate/resource/80
- —USDC asset contract is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Basehttps://lowpaymentfee.com/api/v1/generate/resource/80
- —Documentation pages (/docs, /pricing, /api, /README) returned only 'Connect wallet' with no substantive contenthttps://lowpaymentfee.com/docs