Pay-per-call premium API access on Base network via x402 protocol at $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 platform, which spans categories including Data & Analytics, AI & Machine Learning, Finance & Web3, and Infrastructure utilities. All endpoints are priced at $0.02 per request, paid in USDC on the Base network with no API keys, no rate limits, and no commitments required.
The specific endpoint `/api/v1/transactions/114` accepts POST requests and returns JSON. The x402 challenge confirms it is live, requiring a maximum of 20,000 base units of USDC (0.02 USD, since USDC uses 6 decimals) per call, settling to address `0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3` on Base. The timeout for payment is 300 seconds.
The platform advertises a broad suite of endpoints but documentation is extremely sparse — the docs, API, pricing, and README pages all render only a "Connect wallet" prompt with no further technical detail. There is no OpenAPI spec, no request/response schema documentation, and no examples available. The exact functionality of the `/api/v1/transactions/114` endpoint is unclear beyond its generic "Premium API Access" label.
Capabilities
Use cases
- —Accessing premium data or transaction information with per-call USDC micropayments
- —Integrating pay-as-you-go API calls into autonomous agent workflows
- —Testing x402 protocol payment flows on Base network
Fit
Best for
- —Developers experimenting with x402 payment protocol
- —Agents needing keyless, pay-per-call API access
- —Users who want no-commitment, no-rate-limit API usage
Not for
- —Users needing detailed API documentation or schemas before integration
- —High-volume use cases where per-call pricing may add up without bulk discounts
- —Anyone without a Base network USDC wallet
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/transactions/114 \
-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 no documentation, no OpenAPI spec, no request/response examples, and the exact functionality of this specific endpoint is unknown. The docs pages are empty beyond a wallet connect prompt.
Warnings
- —No API documentation available — docs, pricing, and README pages only show 'Connect wallet'
- —No OpenAPI or schema specification found
- —Exact functionality of /api/v1/transactions/114 is unclear — 'Premium API Access' is generic
- —No request body schema or response schema documented
Citations
- —All endpoints priced at $0.02 per request with no API keys, no rate limits, instant access on Base networkhttps://lowpaymentfee.com
- —x402 challenge confirms 20000 base units USDC (USD Coin, 6 decimals = $0.02) on Base networkhttps://lowpaymentfee.com/api/v1/transactions/114
- —Payment address is 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3 with 300 second timeouthttps://lowpaymentfee.com/api/v1/transactions/114