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/179` appears to be part of a broader platform offering dozens of pay-per-call API 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 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 subscription commitments — callers simply attach an X-PAYMENT header with a valid x402 payment proof.
The specific functionality behind `/api/v1/trades/179` is not documented in the crawled material. The path suggests it may return data about a particular trade (ID 179), but this is speculative. The broader platform lists endpoints for metrics, reports, data export, insights, sentiment analysis, text summarization, classification, embeddings, price feeds, exchange rates, token quotes, gas estimates, geocoding, validation, conversion, and generation — all at the same $0.02 price point. Documentation pages beyond the landing page returned only a "Connect wallet" prompt with no further technical detail.
Capabilities
Use cases
- —Fetching trade data on a per-request payment basis without needing an API key
- —Integrating low-cost paid API calls into autonomous agent workflows on Base
- —Accessing premium data endpoints with on-chain USDC micropayments
Fit
Best for
- —Agents or bots that need keyless, pay-as-you-go API access
- —Developers experimenting with x402 payment protocol integrations
- —Use cases requiring low-friction, per-call pricing without subscriptions
Not for
- —Users who need detailed API documentation or OpenAPI schemas before integrating
- —High-volume consumers who would benefit from bulk/subscription pricing
- —Anyone without a Base-compatible USDC wallet
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/trades/179 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402_payment_proof>"Endpoint
Quality
The endpoint is live (402 challenge confirmed) and pricing is clear ($0.02 USDC on Base). However, there is no documentation for this specific endpoint's request/response schema, no OpenAPI spec, and the docs/pricing/README pages all returned only a wallet-connect prompt. The purpose of /api/v1/trades/179 is unclear — effectively a stub listing.
Warnings
- —No documentation available for /api/v1/trades/179 — the specific request body and response format are unknown.
- —All documentation pages beyond the landing page returned only 'Connect wallet' with no technical content.
- —The endpoint path suggests a single trade resource (ID 179) but this is unconfirmed.
- —No OpenAPI or schema definition is provided by the platform.
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/179
- —USDC asset contract is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Basehttps://lowpaymentfee.com/api/v1/trades/179
- —Platform pricing is $0.02 per request with no API keys, no rate limits, and instant access on Base networkhttps://lowpaymentfee.com
- —The platform offers endpoints across Data & Analytics, AI & ML, Finance & Web3, and Infrastructure categorieshttps://lowpaymentfee.com