Pay-per-call premium API access on Base via x402 — $0.02/request in USDC.
What it does
This endpoint at lowpaymentfee.com provides "Premium API Access" via the x402 payment protocol. It is one of many endpoints offered by the lowpaymentfee.com platform, which hosts a collection of pay-per-request APIs spanning data & analytics, AI & machine learning, finance & Web3, and infrastructure utilities. All endpoints are priced at $0.02 per request, settled in USDC on the Base network, with no API keys, rate limits, or commitments required.
The specific endpoint `/api/v1/payments/164` is listed as "Premium API Access" but its exact functionality is not documented beyond that label. The x402 challenge confirms it is live, accepts POST requests, and requires payment of up to 20,000 base units of USDC (0.02 USD) on Base (asset contract 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913). The payment is sent to address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3 with a 300-second timeout.
The platform's documentation pages (docs, pricing, API reference) all render only a "Connect wallet" prompt with no further content, so detailed request/response schemas, parameter documentation, and example payloads are unavailable. The endpoint returns application/json but the structure of the response is unknown. Given the sparse documentation, treat this as an exploratory or demonstration endpoint until more details surface.
Capabilities
Use cases
- —Accessing premium data or services with per-request USDC micropayments on Base
- —Integrating pay-as-you-go API calls into agent workflows without API key management
- —Testing x402 payment protocol integrations against a live endpoint
Fit
Best for
- —Developers experimenting with x402 payment-gated APIs
- —Agents that can settle USDC payments on Base automatically
- —Use cases requiring keyless, commitment-free API access
Not for
- —Users who need detailed API documentation or guaranteed SLAs before integrating
- —Applications requiring non-crypto payment methods
- —High-volume batch processing where per-request fees add up quickly
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/payments/164 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-token>"Endpoint
Quality
The endpoint is live (402 challenge confirmed) and pricing is clear ($0.02 USDC on Base), but there is no documentation of what the endpoint actually does, no request/response schema, and all doc pages render only 'Connect wallet'. The 'Premium API Access' label is generic and uninformative.
Warnings
- —The exact functionality of /api/v1/payments/164 is undocumented — 'Premium API Access' is the only description available.
- —All documentation pages (docs, pricing, API, README) return only a 'Connect wallet' prompt with no usable content.
- —No OpenAPI spec, request schema, or response schema is available.
- —The endpoint's purpose is unclear and may be a placeholder or demonstration.
Citations
- —Endpoint returns 402 with x402 challenge requiring up to 20000 base units of USDC on Basehttps://lowpaymentfee.com/api/v1/payments/164
- —Platform lists all APIs at $0.02/request with no API keys, no rate limits, and instant access on Base networkhttps://lowpaymentfee.com
- —USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913https://lowpaymentfee.com/api/v1/payments/164
- —Documentation pages render only 'Connect wallet' with no further contenthttps://lowpaymentfee.com/docs