Pay-per-call API platform on Base (USDC) covering data, AI, finance, and utility endpoints at $0.02/request.
What it does
lowpaymentfee.com is an x402-enabled API marketplace that offers a broad set 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, settled in USDC on the Base network via the x402 protocol.
The specific endpoint at `/api/v1/wire/117` is listed as "Premium API Access" and returns a valid x402 challenge requesting up to 20,000 base units of USDC (0x8335…2913 on Base, 6 decimals = $0.02). Payment is made via the `exact` scheme with a 300-second timeout. No API keys or rate limits are advertised; access is instant once payment is included in the X-PAYMENT header.
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 documentation, and no usage examples available from the crawled content. The exact functionality behind the `/api/v1/wire/117` "Premium API Access" endpoint is unclear and may be a generic or catch-all route rather than a specific service.
Capabilities
Use cases
- —Calling AI inference endpoints (sentiment, summarization, classification, embeddings) without API key management
- —Fetching real-time financial data like token quotes, gas estimates, and exchange rates on a per-request basis
- —Running utility operations such as geocoding, validation, and data conversion with instant crypto-settled access
Fit
Best for
- —Agents or apps that need low-friction, keyless API access paid per call
- —Developers who want to pay in USDC on Base without subscriptions or commitments
- —Prototyping workflows that combine data, AI, and finance endpoints under one provider
Not for
- —Production workloads requiring detailed API documentation, SLAs, or guaranteed uptime
- —Use cases needing high-throughput batch processing where per-request pricing is inefficient
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/wire/117 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-token>" \
-d '{}'Endpoint
Quality
The endpoint is live and returns a valid x402 challenge with clear pricing ($0.02 USDC on Base). However, documentation is essentially nonexistent — all doc/pricing/readme pages show only 'Connect wallet'. There is no OpenAPI spec, no request/response schemas, no examples, and the specific purpose of /api/v1/wire/117 is not explained beyond the generic label 'Premium API Access'.
Warnings
- —No documentation available — /docs, /pricing, /api, and /README pages all render only 'Connect wallet'
- —No OpenAPI or schema definitions found for any endpoint
- —The specific functionality of /api/v1/wire/117 ('Premium API Access') is unclear and may be a generic or placeholder route
- —No request or response examples available to verify actual endpoint behavior
Citations
- —All endpoints are priced at $0.02 per request with no API keys, no rate limits, and instant access on Base networkhttps://lowpaymentfee.com
- —The x402 challenge for /api/v1/wire/117 requests maxAmountRequired of 20000 base units of USDC (0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) on Base, which equals $0.02https://lowpaymentfee.com/api/v1/wire/117
- —Categories include Data & Analytics, AI & Machine Learning, Finance & Web3, and Infrastructurehttps://lowpaymentfee.com