Pay-per-call email data endpoint on Base via x402, settled in USDC at $0.02/request.
What it does
This endpoint at `/api/v1/emails/46` is part of the lowpaymentfee.com platform, which offers a collection of pay-per-request APIs spanning data & analytics, AI/ML, finance, infrastructure, and more. All endpoints use the x402 payment protocol, settling in USDC on the Base network. The specific resource at `/api/v1/emails/46` is listed under "Premium API Access" but its exact functionality is not well-documented — the path suggests it returns data related to a specific email record (ID 46), though no schema or example response is provided by the provider.
The x402 challenge confirms the endpoint is live and accepts POST requests. The maximum amount required is 20,000 base units of USDC (0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base), which equals $0.02 per request (USDC uses 6 decimals). Payment is sent to address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3 with a 300-second timeout. The platform advertises no API keys, no rate limits, and instant access.
Documentation is extremely sparse. The docs, API, pricing, and README pages all render only a "Connect wallet" prompt with no substantive content. There is no OpenAPI spec, no request/response schema, and no usage examples available. The endpoint's exact purpose and response format must be inferred from the URL path alone.
Capabilities
Use cases
- —Retrieving email-related data records on a per-call payment basis
- —Agent-driven data access without API key provisioning
- —Programmatic email data lookups settled in USDC on Base
Fit
Best for
- —Agents needing keyless, pay-per-call email data access
- —Developers who want to avoid subscription commitments for occasional lookups
- —x402-compatible clients on the Base network
Not for
- —Bulk email operations requiring high throughput at low marginal cost
- —Users who need detailed documentation or guaranteed SLAs
- —Anyone needing non-USDC or non-Base payment options
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/emails/46 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-header>"Endpoint
Quality
The endpoint is live (402 challenge confirmed) and pricing is clear ($0.02/request in USDC on Base), but there is no documentation, no request/response schema, no examples, and the endpoint's actual functionality is unclear. The docs pages are empty beyond a wallet-connect prompt.
Warnings
- —No documentation available — docs, API, pricing, and README pages all show only 'Connect wallet'
- —No OpenAPI spec or request/response schema provided
- —The exact purpose of /api/v1/emails/46 is unclear; 'Premium API Access' is a generic label used across the platform
- —No examples of successful responses available
Citations
- —The endpoint returns a 402 challenge with maxAmountRequired of 20000 base units of USDC on Basehttps://lowpaymentfee.com/api/v1/emails/46
- —Platform pricing is $0.02 per request with no API keys, no rate limits, and instant accesshttps://lowpaymentfee.com
- —USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913https://lowpaymentfee.com/api/v1/emails/46
- —Docs, API, pricing, and README pages render only a 'Connect wallet' prompthttps://lowpaymentfee.com/docs