Pay-per-request email data endpoint on Base via x402, settled in USDC at $0.02/call.
What it does
This x402-enabled endpoint at `/api/v1/emails/76` 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. Each call is settled on the Base network using USDC (contract `0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913`) with no API keys, no rate limits, and no subscriptions required. The x402 challenge advertises a max amount of 20,000 base units, which at 6 decimals for USDC equals $0.02 per request.
The specific endpoint `/api/v1/emails/76` is listed under "Premium API Access" but its exact functionality is not well-documented. Based on the URL pattern it likely returns email-related data for a specific resource (ID 76). The endpoint accepts HTTP POST requests and returns `application/json`. The payment timeout is 300 seconds, and the x402 version is 1 using the "exact" payment scheme.
The broader lowpaymentfee.com platform advertises additional endpoints for sentiment analysis, text summarization, classification, embeddings, price feeds, exchange rates, geocoding, validation, and more — all at the same $0.02/request price point. Documentation beyond the landing page is sparse; the docs, API, pricing, and README pages all render only a "Connect wallet" prompt with no substantive content.
Capabilities
Use cases
- —Retrieving email-related data on a per-request payment basis
- —Integrating pay-as-you-go email data into agent workflows
- —Accessing premium email information without API key registration
Fit
Best for
- —Agents needing on-demand email data with no subscription commitment
- —Developers experimenting with x402 payment protocol integrations
- —Low-volume or sporadic email data lookups at $0.02 per call
Not for
- —High-volume email data needs where per-request pricing becomes expensive
- —Users who need detailed API documentation and schema definitions before integrating
- —Use cases requiring non-USDC or non-Base-network payment settlement
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/emails/76 \
-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 USDC on Base), but there is no documentation for the specific /api/v1/emails/76 endpoint — no request schema, no response schema, no examples. The docs/pricing/README pages are all empty beyond a wallet connect prompt. The endpoint's actual functionality is unclear.
Warnings
- —No documentation available for the /api/v1/emails/76 endpoint — exact functionality is unknown
- —All doc pages (docs, API, pricing, README) render only 'Connect wallet' with no content
- —No request or response schema provided; input/output format must be guessed
- —The endpoint path suggests a single fixed resource (ID 76) rather than a parameterized query
Citations
- —The x402 challenge advertises maxAmountRequired of 20000 base units in USDC on Base networkhttps://lowpaymentfee.com/api/v1/emails/76
- —USDC asset contract is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913https://lowpaymentfee.com/api/v1/emails/76
- —All APIs priced at $0.02/request with no API keys, no rate limits, and instant access on Base networkhttps://lowpaymentfee.com
- —Platform offers endpoints across Data & Analytics, AI & ML, Finance & Web3, and Infrastructure categorieshttps://lowpaymentfee.com