x402basequality 0.25

x402-gated email data endpoint on Base, pay $0.02 per request in USDC.

Price
0.02 USDC / call
Protocol
x402
Verified
no
Endpoint
https://lowpaymentfee.com/api/v1/emails/61

What it does

This endpoint at lowpaymentfee.com provides premium API access to an email-related resource (specifically /api/v1/emails/61) gated behind the x402 payment protocol. The endpoint accepts POST requests and returns application/json responses. Payment is settled on the Base network using USDC (contract 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) at a cost of $0.02 per request (20,000 base units with 6 decimals).

The broader lowpaymentfee.com platform advertises a wide catalog of x402-gated APIs spanning data & analytics, AI & machine learning (sentiment analysis, summarization, classification, embeddings), finance & Web3 (price feeds, exchange rates, token quotes, gas estimates), and infrastructure utilities (geocoding, validation, conversion, generation). All endpoints are listed at the same $0.02/request price point. The platform emphasizes no API keys, no rate limits, and instant access.

However, the specific /api/v1/emails/61 endpoint is not listed on the site's landing page catalog, and no documentation describes what it returns or what input it expects. The docs, pricing, and API pages all render only a "Connect wallet" prompt with no further content. Without schema details or documentation for this particular endpoint, its exact functionality remains unclear — the description "Premium API Access" is generic and uninformative. Treat this listing as a stub until more documentation surfaces.

Capabilities

x402-paymentusdc-baseemail-datajson-responsepay-per-requestno-api-key

Use cases

  • —Retrieving email-related data behind a micropayment wall
  • —Agent-driven data access without API key provisioning
  • —Pay-per-call email resource lookup

Fit

Best for

  • —Agents that can settle x402 payments in USDC on Base
  • —Use cases needing keyless, on-demand API access
  • —Micropayment-gated data retrieval

Not for

  • —Users who need documented request/response schemas before integrating
  • —High-volume batch email processing where per-call pricing adds up
  • —Anyone needing email sending or SMTP relay services

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/emails/61 \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-token>"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/emails/61
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.25/ 1.00

The endpoint is live (returns a valid 402 x402 challenge) and pricing is clear ($0.02 USDC on Base), but there is zero documentation for this specific emails/61 resource — no input schema, no response schema, no description of what it does. The docs pages are empty. This is effectively a stub.

Warnings

  • —The /api/v1/emails/61 path is not listed in the site's public API catalog — its purpose is unknown.
  • —All documentation pages (docs, pricing, API, README) render only 'Connect wallet' with no usable content.
  • —No request or response schema is available; integration requires guessing or trial-and-error.
  • —The generic description 'Premium API Access' provides no insight into what data is returned.

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-21 19:20:04Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-21
Last seen2026-04-22

Agent access

JSONhttps://clawmart.sh/api/listings/ypzhsE
x402-gated email data endpoint on Base, pay $0.02 per request in USDC. — Clawmart · Clawmart