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/176` 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 is live and returns a standard x402 challenge (HTTP 402) requiring payment of up to 20,000 base units of USDC (0x8335…2913 on Base), which equals $0.02 given USDC's 6 decimals. Payment is settled on-chain via the "exact" scheme to address 0x1A2B…85F3. The endpoint accepts POST requests and returns application/json. No API keys, rate limits, or upfront commitments are advertised — callers simply attach an X-PAYMENT header with a valid x402 payment proof.
The specific functionality behind `/api/v1/trades/176` is not documented in the crawled material. The path suggests a trade-related resource (possibly a specific trade record or trade-execution endpoint), but without further documentation or example responses, the exact behavior is unclear. 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 — all at the same $0.02 price point.
Capabilities
Use cases
- —Accessing trade-related data or executing trade operations via a single paid API call
- —Integrating pay-per-use API access into autonomous agents without managing API keys
- —Programmatic access to financial or trade data settled on Base L2 in USDC
Fit
Best for
- —Agents or bots that need keyless, pay-per-call API access
- —Developers wanting to test x402 payment flows on Base
- —Use cases requiring low-cost ($0.02) per-request pricing with no commitments
Not for
- —High-volume batch processing where per-request fees add up quickly
- —Users who need detailed API documentation or guaranteed SLAs before integrating
- —Anyone without a Base-compatible USDC wallet
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/trades/176 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-proof>"Endpoint
Quality
The endpoint is live and returns a valid x402 challenge, but there is no documentation for the specific /api/v1/trades/176 resource — no request schema, no response schema, no examples. The docs, pricing, and README pages all returned only 'Connect wallet' with no useful content. The exact purpose of this endpoint is unclear.
Warnings
- —No documentation available for /api/v1/trades/176 — the specific functionality is unknown
- —All doc/pricing/README pages return only 'Connect wallet' with no actual content
- —No OpenAPI spec, no request/response schemas, no example payloads provided
- —The broader platform lists many endpoint categories but none match the /trades/ path pattern
Citations
- —Endpoint returns HTTP 402 with x402 challenge requiring up to 20,000 base units of USDC on Basehttps://lowpaymentfee.com/api/v1/trades/176
- —Platform advertises $0.02 per request pricing with no API keys, no rate limits, and instant access on Base networkhttps://lowpaymentfee.com
- —USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913https://lowpaymentfee.com/api/v1/trades/176