Pay-per-call email data endpoint on Base via x402, settled in USDC at $0.02/request.
What it does
This x402-enabled endpoint at `/api/v1/emails/17` is part of the lowpaymentfee.com platform, which offers a collection of pay-per-request APIs spanning data analytics, AI/ML inference, finance, and utility services. Each call is settled on the Base network using USDC (contract 0x8335…2913) through the x402 payment protocol. The specific resource at `/emails/17` is labeled "Premium API Access" and accepts POST requests.
The x402 challenge advertises a maximum amount of 20,000 base units of USDC (6 decimals), which equals $0.02 per request — consistent with the uniform $0.02 pricing shown across all endpoints on the provider's landing page. No API keys or rate limits are required; payment is handled entirely via the X-PAYMENT header. The endpoint returns `application/json`.
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 description of what the `/emails/17` resource actually returns. The endpoint name and path suggest it retrieves or processes email-related data for a specific record (ID 17), but the exact functionality cannot be confirmed from available material.
Capabilities
Use cases
- —Retrieving email-related data on a per-request payment basis without needing an API key
- —Integrating pay-as-you-go email data access into agent workflows via x402
- —Programmatic access to email records settled in USDC on Base
Fit
Best for
- —Developers wanting zero-commitment, per-call email data access
- —AI agents that can settle x402 payments autonomously on Base
- —Projects needing low-cost ($0.02) email data lookups without subscription overhead
Not for
- —Users who need detailed API documentation or response schemas before integrating
- —High-volume bulk email operations where per-call pricing may add up
- —Anyone without a Base-compatible USDC wallet
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/emails/17 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-token>"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 explanation of what the /emails/17 resource actually does. The docs pages are empty beyond a wallet-connect prompt. This is effectively a stub listing.
Warnings
- —No documentation available — all doc/API/pricing/README pages show only 'Connect wallet'
- —No OpenAPI or request/response schema provided; exact functionality of /api/v1/emails/17 is unknown
- —The endpoint path suggests a single fixed resource (ID 17) rather than a parameterized query — unclear if this is a demo or production resource
- —Email-related endpoints may involve personal data; verify compliance with applicable privacy regulations
Citations
- —Uniform $0.02 per request pricing across all endpointshttps://lowpaymentfee.com
- —No API keys, no rate limits, instant access, Base networkhttps://lowpaymentfee.com
- —x402 challenge returns maxAmountRequired of 20000 base units of USDC on Basehttps://lowpaymentfee.com/api/v1/emails/17
- —USDC asset contract 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Basehttps://lowpaymentfee.com/api/v1/emails/17