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. The site hosts a broad catalog of pay-per-request APIs spanning data & analytics, AI/ML inference (sentiment analysis, summarization, classification, embeddings), finance & Web3 (price feeds, exchange rates, token quotes, gas estimates), and infrastructure utilities (geocoding, validation, conversion, generation). Each endpoint is priced at $0.02 per request, settled in USDC on the Base network.
The specific resource `/api/v1/generate/resource/119` is labeled "Premium API Access" without further documentation on what it returns. The x402 challenge confirms the endpoint is live, accepting POST requests, and requires a payment of up to 20,000 base units of USDC (0.02 USD) per call. Payment is made to address `0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3` on Base. No API keys or rate limits are advertised — access is gated purely by micropayment.
Documentation is extremely sparse. The /docs, /pricing, /api, and /README pages all render only a "Connect wallet" prompt with no additional technical detail. There is no OpenAPI spec, no request/response schema, and no usage examples available. The exact functionality behind resource/119 is unclear from the available material.
Capabilities
Use cases
- —Programmatic access to a pay-per-call API without needing API keys or subscriptions
- —Agent-driven workflows that settle per-request costs in USDC on Base
- —Testing x402 payment protocol integrations with a low-cost endpoint
Fit
Best for
- —Developers experimenting with x402 micropayment-gated APIs
- —AI agents that need keyless, on-demand API access settled in crypto
- —Low-volume, pay-as-you-go API consumption without commitments
Not for
- —Users who need detailed documentation or guaranteed SLAs before integrating
- —High-volume production workloads where per-request crypto settlement adds overhead
- —Anyone who needs to know exactly what the endpoint returns before paying
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/generate/resource/119 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-token>"Endpoint
Quality
The endpoint is live and returns a valid x402 challenge, but there is zero documentation on what this specific resource does, no request/response schema, and no examples. The docs pages are empty. The listing is effectively a stub with confirmed liveness and pricing.
Warnings
- —No documentation available — /docs, /pricing, /api, and /README all render only 'Connect wallet' with no content.
- —The exact functionality of /api/v1/generate/resource/119 ('Premium API Access') is unknown; no input or output schema is provided.
- —The site lists many endpoints but none have documented request/response formats.
- —Cannot verify what data or service is returned after payment.
Citations
- —Endpoint returns HTTP 402 with x402 challenge, confirming it is livehttps://lowpaymentfee.com/api/v1/generate/resource/119
- —Price is $0.02 per request, paid in USDC on Base networkhttps://lowpaymentfee.com
- —No API keys, no rate limits, instant access advertisedhttps://lowpaymentfee.com
- —USDC asset address 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Basehttps://lowpaymentfee.com/api/v1/generate/resource/119
- —maxAmountRequired is 20000 base units (0.02 USDC with 6 decimals)https://lowpaymentfee.com/api/v1/generate/resource/119