Pay-per-request email data endpoint on Base via x402, settled in USDC at $0.02/call.
What it does
This endpoint at `/api/v1/emails/64` 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/64` is listed under "Premium API Access" but its exact functionality is not well-documented — the path suggests it returns email-related data for a specific record (ID 64), though no schema or example response is provided by the provider.
The endpoint is live and returns a valid x402 challenge. The price is 20,000 base units of USDC (6 decimals), which equals $0.02 per request. Payment is made via the x402 `exact` scheme to the specified wallet address. The platform advertises no API keys, no rate limits, and instant access — you simply attach an x402 payment header to your POST request.
Documentation is extremely sparse. The docs, pricing, API, and README pages all render only a "Connect wallet" prompt with no additional content. There is no OpenAPI spec, no request/response schema, and no usage examples provided by the site. The endpoint's purpose must be inferred entirely from its URL path and the generic "Premium API Access" description.
Capabilities
Use cases
- —Retrieving email-related data for a specific record via a single paid request
- —Agent-driven workflows that need email data without managing API keys or subscriptions
- —Programmatic access to email information settled instantly on Base L2
Fit
Best for
- —Agents or scripts that need one-off email data lookups without subscription overhead
- —Developers experimenting with x402 payment-gated APIs
- —Use cases where no-API-key, no-rate-limit access is preferred
Not for
- —Bulk email operations requiring thousands of calls (no documented batch support)
- —Users who need detailed documentation or guaranteed SLAs before integrating
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/emails/64 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-header>"Endpoint
Quality
The endpoint is live and returns a valid x402 challenge, but documentation is essentially nonexistent — no OpenAPI spec, no request/response schema, no examples, and the docs pages are empty. The endpoint's actual functionality (what email data it returns, what input it expects) cannot be confirmed from available material.
Warnings
- —No documentation available — docs, pricing, API, and README pages all show only 'Connect wallet' with no content.
- —No request or response schema provided; the purpose of /api/v1/emails/64 is inferred solely from the URL path.
- —The endpoint is not listed on the provider's homepage among the advertised API categories, raising questions about its status.
- —No OpenAPI specification or ai-plugin manifest found.
Citations
- —The endpoint returns a valid x402 challenge with maxAmountRequired of 20000 base units of USDC on Base networkhttps://lowpaymentfee.com/api/v1/emails/64
- —The platform advertises $0.02/request pricing with no API keys, no rate limits, and instant accesshttps://lowpaymentfee.com
- —USDC asset contract on Base: 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913https://lowpaymentfee.com/api/v1/emails/64