x402-payable API platform on Base offering data, AI, finance, and utility endpoints at $0.02/request.
What it does
lowpaymentfee.com is an x402-enabled API marketplace that exposes a variety of endpoints across four categories: Data & Analytics (metrics, reports, data export, insights), AI & Machine Learning (sentiment analysis, text summarization, classification, embeddings), Finance & Web3 (price feeds, exchange rates, token quotes, gas estimates), and Infrastructure utilities (geocoding, validation, conversion, generation). All endpoints are priced at $0.02 per request, paid in USDC on the Base network via the x402 protocol — no API keys, no rate limits, and no upfront commitments.
The specific endpoint at `/api/v1/generate/resource/174` is listed as "Premium API Access" and returns a standard x402 challenge with a maxAmountRequired of 20,000 base units of USDC (0.02 USDC, i.e., $0.02). Payment is made via the `exact` scheme to the specified wallet address on Base. The endpoint accepts HTTP POST requests and returns `application/json` responses.
Documentation is extremely sparse — the /docs, /pricing, /api, and /README pages all render only a "Connect wallet" prompt with no further content. There is no OpenAPI spec, no request/response schema documentation, and no usage examples available. The exact functionality behind the "Premium API Access" label at resource/174 is unclear, as it does not map to any of the named endpoints listed on the homepage. Prospective users should be aware that without documentation, the input format and output structure for this endpoint are unknown.
Capabilities
Use cases
- —Programmatic access to utility/data endpoints without API key management
- —Agent-driven workflows that need on-demand paid API calls settled in USDC on Base
- —Accessing AI inference, finance data, or utility services with per-request micropayments
Fit
Best for
- —Developers or agents wanting zero-signup, pay-per-use API access
- —x402-compatible clients on the Base network
- —Low-volume or sporadic API consumers who want no subscriptions
Not for
- —Users needing detailed API documentation or guaranteed SLAs before integrating
- —High-volume consumers who need bulk pricing or rate-limit guarantees
- —Users without USDC on Base or an x402-compatible payment client
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/generate/resource/174 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-token>" \
-d '{}'Endpoint
Quality
The endpoint is live and returns a valid x402 challenge, but documentation is essentially nonexistent — all doc/pricing/readme pages show only 'Connect wallet'. There is no OpenAPI spec, no request/response schema, and the specific resource/174 endpoint's purpose is undocumented. The listing is effectively a stub.
Warnings
- —No documentation available — /docs, /pricing, /api, and /README pages all render only 'Connect wallet' with no content.
- —The endpoint path /api/v1/generate/resource/174 does not correspond to any named endpoint on the homepage; its actual functionality is unknown.
- —No request or response schema is documented or discoverable.
- —No OpenAPI specification or ai-plugin manifest found.
Citations
- —All endpoints are priced at $0.02 per request with no API keys, no rate limits, and instant access on Base network.https://lowpaymentfee.com
- —The x402 challenge returns maxAmountRequired of 20000 base units of USDC (asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) on Base network.https://lowpaymentfee.com/api/v1/generate/resource/174
- —Available API categories include Data & Analytics, AI & Machine Learning, Finance & Web3, and Infrastructure.https://lowpaymentfee.com
- —Documentation pages (/docs, /pricing, /api, /README) render only a 'Connect wallet' prompt with no further content.https://lowpaymentfee.com/docs