Coinbase earnings data via x402 micropayment on Base network, $0.02 per request.
What it does
This endpoint at lowpaymentfee.com provides financial earnings data (likely Coinbase-related, given the /finance/CB/earnings path) accessible through the x402 payment protocol. Each request costs $0.02 in USDC on the Base network — no API keys, no rate limits, and no subscriptions required. The caller simply includes an X-PAYMENT header with a valid x402 payment proof to receive a JSON response.
The endpoint is live and returns a standard x402 challenge (HTTP 402) when called without payment. It accepts POST requests and settles payments to address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3 using USDC (contract 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) on Base. The maximum amount required is 20,000 base units of USDC (6 decimals), which equals $0.02. The payment timeout is 300 seconds.
The provider (lowpaymentfee.com) hosts a broad catalog of x402-gated APIs spanning data analytics, AI/ML inference, finance/Web3, and utility services, all priced at $0.02 per call. However, documentation is extremely sparse — the docs, pricing, and API pages all render only a "Connect wallet" prompt with no further detail. There is no OpenAPI schema, no request/response examples, and no description of what fields the /finance/CB/earnings endpoint actually returns. The exact data source and response format must be discovered by making a paid request.
Capabilities
Use cases
- —Retrieving Coinbase (or CB-related) earnings data on demand without API key management
- —Integrating earnings data into trading bots or financial dashboards via x402 micropayments
- —Agents autonomously purchasing financial data with USDC on Base
Fit
Best for
- —Developers who want keyless, pay-per-call access to earnings data
- —AI agents that can settle x402 payments autonomously on Base
- —Projects needing low-friction financial data without subscription commitments
Not for
- —Users who need detailed API documentation or guaranteed SLA before integrating
- —High-volume consumers who would benefit from bulk pricing or subscription plans
- —Anyone without USDC on Base network
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/finance/CB/earnings \
-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), but there is zero documentation on request parameters, response schema, or what 'CB/earnings' actually returns. No OpenAPI spec, no examples, and all doc pages render only 'Connect wallet'.
Warnings
- —No documentation available — docs, pricing, API, and README pages all show only 'Connect wallet'
- —No OpenAPI or output schema describing request parameters or response fields
- —Unclear what 'CB' refers to (likely Coinbase, but unconfirmed) and what earnings data is returned
- —Cannot verify data quality or source without making a paid request
Citations
- —Endpoint returns HTTP 402 with x402 challenge requiring 20000 base units of USDC on Basehttps://lowpaymentfee.com/api/v1/finance/CB/earnings
- —USDC asset contract is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base networkhttps://lowpaymentfee.com/api/v1/finance/CB/earnings
- —All APIs priced at $0.02 per request with no API keys, no rate limitshttps://lowpaymentfee.com
- —Docs, pricing, API, and README pages render only 'Connect wallet'https://lowpaymentfee.com/docs