Pay-per-call email API endpoint on Base via x402, settled in USDC at $0.02/request.
What it does
This endpoint at `/api/v1/emails/24` is part of the lowpaymentfee.com platform, which offers a collection of x402-protocol APIs spanning data analytics, AI/ML, finance, infrastructure, and more. Each endpoint is pay-per-request with no API keys, no rate limits, and no commitments required. Payment is settled on the Base network using USDC.
The specific endpoint probed (`/api/v1/emails/24`) is listed under "Premium API Access" and accepts POST requests. The x402 challenge confirms it is live, requiring a maximum of 20,000 base units of USDC (i.e., $0.02) per call, paid to address `0x1A2B...85F3` on Base. The asset is the canonical Base USDC contract (`0x8335...2913`). The endpoint returns `application/json`.
Documentation is extremely sparse — the docs, pricing, API, and README pages all render only a "Connect wallet" prompt with no further content. There is no OpenAPI schema, no request/response examples, and no description of what the `/api/v1/emails/24` endpoint actually does or what input it expects. The "emails" path segment and the numeric ID `24` suggest it may return or operate on a specific email resource, but this is purely speculative. Prospective users should test the endpoint directly or contact the provider for details.
Capabilities
Use cases
- —Retrieving or interacting with email data via a single paid API call
- —Integrating email functionality into agent workflows without API key management
- —Testing x402 payment flows with a low-cost endpoint
Fit
Best for
- —Developers experimenting with x402 payment protocol
- —Agents needing keyless, pay-per-use email data access
- —Low-volume or sporadic email API usage without subscription commitments
Not for
- —High-volume email sending or marketing automation (no evidence of bulk support)
- —Users who need detailed documentation or SLA guarantees before integrating
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/emails/24 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-header>"Endpoint
Quality
The endpoint is confirmed live via a valid 402 challenge with clear pricing and network details. However, there is no documentation, no OpenAPI schema, no request/response examples, and no explanation of what the emails/24 endpoint actually does. The listing is effectively a stub.
Warnings
- —No documentation available — docs, pricing, API, and README pages all show only 'Connect wallet' with no content.
- —No OpenAPI or schema describing request parameters or response format for /api/v1/emails/24.
- —The purpose of the 'emails/24' endpoint is unknown — the path suggests email data but no details are provided.
- —The broader lowpaymentfee.com platform lists many endpoint categories but this specific endpoint is not listed on the homepage.
Citations
- —The endpoint returns a 402 challenge requiring 20,000 base units of USDC ($0.02) on Base network.https://lowpaymentfee.com/api/v1/emails/24
- —The platform advertises $0.02/request pricing with no API keys, no rate limits, and instant access on Base network.https://lowpaymentfee.com
- —The USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913.https://lowpaymentfee.com/api/v1/emails/24