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. It is one of many endpoints offered by the lowpaymentfee.com platform, which hosts a broad catalog of pay-per-call APIs spanning data & analytics, AI & machine learning, finance & Web3, and infrastructure utilities. All endpoints are priced at $0.02 per request, settled in USDC on the Base network, with no API keys, rate limits, or upfront commitments required.
The specific endpoint `/api/v1/trades/85` appears to fall under the finance or trading category, though the platform's landing page does not list it explicitly among the showcased APIs. The x402 challenge confirms it is live and accepts POST requests, requiring a maximum of 20,000 base units of USDC (i.e., $0.02) per call, paid to address `0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3`. The response MIME type is `application/json`.
Documentation beyond the landing page is extremely sparse — the docs, API, pricing, and README pages all render only a "Connect wallet" prompt with no additional technical detail. There is no OpenAPI spec, no request/response schema, and no example payloads available. The exact data returned by `/api/v1/trades/85` (e.g., whether it returns trade details for trade ID 85, or something else) cannot be confirmed from the available material.
Capabilities
Use cases
- —Fetching trade data or details for a specific trade ID via a single paid API call
- —Integrating low-cost, keyless API access into automated trading or analytics pipelines
- —Agent-driven data retrieval where per-call USDC micropayments replace traditional API key subscriptions
Fit
Best for
- —Developers wanting zero-signup, pay-per-use API access
- —AI agents that can settle x402 payments in USDC on Base
- —Projects needing low-friction access to trade-related data without rate limits
Not for
- —Users who need detailed API documentation or guaranteed SLAs before integrating
- —High-volume consumers who would benefit from bulk pricing or subscription plans
- —Anyone unable to transact in USDC on the Base L2 network
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/trades/85 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-header>"Endpoint
Quality
The endpoint is confirmed live via a valid x402 402 challenge, and pricing is clear ($0.02 USDC on Base). However, there is no OpenAPI spec, no request/response schema, no documentation, and no examples. The specific purpose of /api/v1/trades/85 is not documented anywhere in the crawled material, making this effectively a stub listing.
Warnings
- —No OpenAPI or schema documentation available — request and response formats are unknown.
- —The specific endpoint /api/v1/trades/85 is not listed on the platform's landing page among showcased APIs; its exact purpose is unclear.
- —All documentation pages (docs, API, pricing, README) render only a 'Connect wallet' prompt with no technical content.
- —The meaning of 'trades/85' (whether 85 is a trade ID, category, or something else) cannot be determined from available material.
Citations
- —The endpoint returns a 402 challenge requiring USDC payment of 20,000 base units ($0.02) on Base networkhttps://lowpaymentfee.com/api/v1/trades/85
- —All endpoints are priced at $0.02 per request with no API keys, rate limits, or commitmentshttps://lowpaymentfee.com
- —The platform offers APIs across data & analytics, AI & ML, finance & Web3, and infrastructure categorieshttps://lowpaymentfee.com
- —USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913https://lowpaymentfee.com/api/v1/trades/85