x402-gated premium API access on Base, pay $0.02 per request in USDC — no API keys required.
What it does
This endpoint at lowpaymentfee.com provides "Premium API Access" via the x402 payment protocol on the Base network. The specific path `/api/v1/trades/70` appears to be one of many endpoints offered by the provider, which hosts a broad catalog spanning data & analytics, AI & machine learning, finance & Web3, and infrastructure utilities — all priced at $0.02 per request.
The endpoint accepts POST requests and returns JSON. Payment is settled in USDC (contract 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) on Base. The x402 challenge advertises a maxAmountRequired of 20,000 base units, which at 6 decimals equals $0.02. There are no API keys, no rate limits, and no sign-up required — callers simply attach an X-PAYMENT header with a valid x402 payment proof.
The specific functionality behind `/api/v1/trades/70` is not documented in the crawled material. The provider's landing page lists categories like analytics, AI inference, finance, and utilities, but this particular trades endpoint is not among the listed routes. It may relate to a financial trades or transaction lookup, but this is speculative. The docs, pricing, and README pages all rendered only a "Connect wallet" prompt with no additional content, so detailed documentation is unavailable.
Capabilities
Use cases
- —Accessing trade or transaction data via a single paid API call
- —Integrating pay-per-use endpoints into agent workflows without managing API keys
- —Settling micro-payments for API access on Base L2 using USDC
Fit
Best for
- —Agents or developers who want keyless, pay-per-call API access
- —Use cases requiring USDC micropayments on Base
- —Prototyping x402-compatible payment flows
Not for
- —Users who need detailed documentation or OpenAPI schemas before integrating
- —High-volume consumers who prefer subscription-based pricing over per-call fees
- —Anyone without a Base-compatible USDC wallet
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/trades/70 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402_payment_proof>"Endpoint
Quality
The endpoint is live (402 challenge captured) and pricing is clear ($0.02 USDC on Base), but there is no documentation for the /api/v1/trades/70 path specifically, no OpenAPI schema, no request/response examples, and the docs pages are empty. The actual functionality of this endpoint is unknown.
Warnings
- —The specific endpoint /api/v1/trades/70 is not listed among the provider's documented APIs — its purpose is unclear.
- —All documentation pages (docs, pricing, README, api) returned only a 'Connect wallet' prompt with no usable content.
- —No OpenAPI spec, request schema, or response schema is available.
- —Functionality must be inferred; the 'trades' path suggests financial data but this is unconfirmed.
Citations
- —The provider lists APIs across data & analytics, AI & ML, finance & Web3, and infrastructure, all at $0.02 per request.https://lowpaymentfee.com
- —Pricing is $0.02 per request with no API keys, no rate limits, and instant access on Base network.https://lowpaymentfee.com
- —x402 challenge shows maxAmountRequired of 20000 base units in USDC (6 decimals) on Base, equaling $0.02.https://lowpaymentfee.com/api/v1/trades/70
- —USDC asset contract is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base.https://lowpaymentfee.com/api/v1/trades/70