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 costs $0.02 per request, settled in USDC on the Base network with no API keys, no rate limits, and no commitments required.
The specific resource probed (/api/v1/generate/resource/132) is labeled "Premium API Access" and returns a valid x402 challenge (version 1, scheme "exact") requesting up to 20,000 base units of USDC (0.02 USD, since USDC uses 6 decimals) on Base. Payment is sent to address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3. The endpoint accepts HTTP POST and returns application/json. The maximum timeout for payment settlement is 300 seconds.
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 examples of what this particular resource returns. The site's landing page lists many endpoints but provides no detail on input parameters or output formats. As a result, while the endpoint is confirmed live and the pricing is clear, the actual functionality behind resource/132 is unknown beyond its generic label.
Capabilities
Use cases
- —Accessing premium API resources with per-call USDC micropayments on Base
- —Agent-driven workflows that need keyless, pay-as-you-go API access
- —Programmatic consumption of paid endpoints without subscription commitments
Fit
Best for
- —Developers wanting zero-commitment, pay-per-use API access
- —AI agents that can settle x402 payments autonomously on Base
- —Users who prefer crypto micropayments over traditional API key subscriptions
Not for
- —Users who need detailed API documentation or schema guarantees before integrating
- —High-volume consumers who would benefit from bulk/subscription pricing
- —Anyone without access to USDC on the Base network
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/generate/resource/132 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-token>"Endpoint
Quality
The endpoint is confirmed live with a valid x402 challenge and clear pricing ($0.02 USDC on Base). However, there is no documentation, no OpenAPI spec, no request/response schema, and no examples. The actual functionality of resource/132 is completely opaque beyond its generic 'Premium API Access' label.
Warnings
- —No documentation available — /docs, /pricing, /api, and /README pages all show only 'Connect wallet' with no content
- —No OpenAPI or schema definition found for any endpoint
- —The specific functionality of /api/v1/generate/resource/132 is unknown — 'Premium API Access' is a generic label
- —No request parameters or response format documented anywhere
Citations
- —The endpoint returns a valid x402 challenge requesting up to 20,000 base units of USDC on Basehttps://lowpaymentfee.com/api/v1/generate/resource/132
- —All endpoints cost $0.02 per request with no API keys, no rate limits, and instant access on Base networkhttps://lowpaymentfee.com
- —The site offers APIs across data & analytics, AI/ML, finance & Web3, and infrastructure categorieshttps://lowpaymentfee.com
- —USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913https://lowpaymentfee.com/api/v1/generate/resource/132