x402-gated premium API access on Base, pay $0.02 per request in USDC.
What it does
This endpoint at lowpaymentfee.com provides "Premium API Access" via the x402 payment protocol. The specific resource path `/api/v1/trades/190` suggests a trade-data or financial-trades endpoint, though the provider's landing page does not document this particular path explicitly. The site hosts a broad catalog of pay-per-call APIs spanning data & analytics, AI/ML (sentiment, summarization, classification, embeddings), finance & Web3 (price feeds, exchange rates, token quotes, gas estimates), and infrastructure utilities (geocoding, validation, conversion, generation).
Payment is settled on the Base network using USDC (contract 0x8335…2913). The x402 challenge advertises a maxAmountRequired of 20000 base units; with USDC's 6 decimals that equals $0.02 per request, consistent with the site's stated flat pricing of $0.02/request across all endpoints. The provider advertises no API keys, no rate limits, and instant access — callers simply attach an X-PAYMENT header with a valid x402 payment proof.
Documentation beyond the landing page is extremely thin: the /docs, /pricing, /api, and /README pages all render only a "Connect wallet" prompt with no further content. There is no OpenAPI spec, no request/response schema, and no usage examples available. The exact behavior and response format of `/api/v1/trades/190` is unknown and must be discovered by making a paid call.
Capabilities
Use cases
- —Fetching trade or financial data on a per-request basis without subscription commitments
- —Agent-driven workflows that need instant, keyless API access paid in USDC on Base
- —Programmatic access to trade information with micropayment settlement
Fit
Best for
- —Agents or bots that can settle x402 payments in USDC on Base
- —Developers who want pay-per-use access without API key management
- —Low-volume or bursty workloads where flat per-request pricing is cost-effective
Not for
- —Users who need detailed documentation or guaranteed response schemas before integrating
- —High-volume consumers who would benefit from bulk/subscription pricing
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/trades/190 \
-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, no OpenAPI spec, no request/response schema, and no examples. The specific resource /api/v1/trades/190 is not described anywhere on the site. Effectively a stub listing.
Warnings
- —No documentation available — /docs, /pricing, /api, /README all show only 'Connect wallet' with no content
- —The specific endpoint /api/v1/trades/190 is not listed on the provider's landing page; its purpose is unclear
- —No OpenAPI spec or response schema available; response format is unknown
- —No request body schema documented; callers must discover input format by trial
Citations
- —Flat pricing of $0.02 per request, no API keys, no rate limits, Base networkhttps://lowpaymentfee.com
- —x402 challenge returns maxAmountRequired 20000 in USDC (6 decimals) on Basehttps://lowpaymentfee.com/api/v1/trades/190
- —USDC asset contract 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Basehttps://lowpaymentfee.com/api/v1/trades/190