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 resource `/api/v1/trades/108` appears to be part of a broader platform offering dozens of pay-per-call endpoints spanning data analytics, AI/ML inference, finance/Web3 data, and infrastructure utilities — all priced at $0.02 per request in USDC.
The endpoint accepts HTTP POST requests and returns JSON. Payment is settled on-chain via USDC (contract 0x8335…2913) on Base, using the x402 "exact" scheme. The maximum amount required per call is 20,000 base units of USDC (6 decimals), which equals $0.02. There are no API keys, no rate limits, and no upfront commitments — callers simply attach an X-PAYMENT header with a valid x402 payment proof.
The specific functionality behind `/api/v1/trades/108` is not documented in the crawled material. The path suggests it may return trade data for a specific trade or asset ID (108), likely in the finance/Web3 category, but this is speculative. The broader platform lists endpoints for metrics, reports, sentiment analysis, text summarization, classification, embeddings, price feeds, exchange rates, token quotes, gas estimates, geocoding, validation, conversion, and generation. Documentation pages returned only a "Connect wallet" prompt with no further technical detail.
Capabilities
Use cases
- —Fetching trade or market data on a per-request payment basis without needing an API key
- —Integrating pay-per-call financial data into autonomous agents that settle payments on Base
- —Accessing premium data endpoints with minimal friction using x402 micropayments
Fit
Best for
- —Agents or bots that need on-demand trade/financial data without subscription commitments
- —Developers experimenting with x402 protocol integrations on Base
- —Low-volume consumers who prefer pay-per-use over monthly plans
Not for
- —High-volume consumers who need bulk pricing or flat-rate plans
- —Users who cannot transact in USDC on the Base network
- —Anyone needing detailed API documentation before integrating — docs are currently sparse
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/trades/108 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402_payment_proof>"Endpoint
Quality
The endpoint is live and returns a valid x402 402 challenge with clear pricing. However, there is no documentation for what /api/v1/trades/108 actually returns, no request/response schema, and the docs/pricing/README pages are all blank beyond a wallet-connect prompt. The specific functionality of this endpoint is unknown.
Warnings
- —No documentation available for /api/v1/trades/108 — the endpoint's actual functionality and response schema are unknown.
- —All documentation pages (docs, pricing, README, api) returned only a 'Connect wallet' prompt with no technical content.
- —The path '/api/v1/trades/108' does not appear in the site's listed API catalog, making its purpose unclear.
- —No OpenAPI spec, no request/response examples, and no error handling documentation found.
Citations
- —The endpoint returns a 402 challenge with x402Version 1, exact scheme, on Base network, requiring 20000 base units of USDChttps://lowpaymentfee.com/api/v1/trades/108
- —USDC asset contract is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Basehttps://lowpaymentfee.com/api/v1/trades/108
- —Platform pricing is $0.02 per request with no API keys, no rate limits, and instant access on Base networkhttps://lowpaymentfee.com
- —The platform lists endpoints across Data & Analytics, AI & ML, Finance & Web3, and Infrastructure categorieshttps://lowpaymentfee.com