x402basequality 0.30

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/48

What it does

This endpoint at `/api/v1/emails/48` is part of the lowpaymentfee.com platform, a collection of x402-protocol pay-per-call APIs spanning data & analytics, AI/ML, finance, and infrastructure categories. The specific resource at `/emails/48` is labeled "Premium API Access" and returns JSON data via HTTP POST. Payment is settled on the Base network using USDC (contract 0x8335…2913) through the x402 exact-payment scheme.

The platform advertises a flat $0.02 per request across all endpoints, with no API keys, no rate limits, and no minimum commitments required. The x402 challenge captured from this endpoint shows a `maxAmountRequired` of 20,000 base units of USDC (6 decimals), which equals $0.02 — consistent with the site's stated pricing. The payment timeout is 300 seconds.

Documentation is extremely sparse. The docs, API, pricing, 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/48` endpoint actually returns. The endpoint path suggests email-related data (possibly a specific email record by ID), but this is purely inferential. The broader platform lists many endpoint categories but provides no detailed documentation for any of them.

Capabilities

x402-paymentusdc-basepay-per-requestjson-responsehttp-postemail-data

Use cases

  • —Retrieving email-related data on a per-request payment basis
  • —Agent-driven data access without API key provisioning
  • —Programmatic access to premium email records via crypto micropayment

Fit

Best for

  • —Agents that can settle x402 payments in USDC on Base
  • —Use cases requiring keyless, pay-as-you-go API access
  • —Low-volume or sporadic data retrieval where subscriptions are overkill

Not for

  • —Users who need detailed API documentation or schema guarantees before integrating
  • —High-volume batch processing where per-request pricing adds up
  • —Users without a Base-compatible USDC wallet

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/emails/48 \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-token>"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/emails/48
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.30/ 1.00

The endpoint is live and returns a valid x402 challenge with consistent pricing, but there is zero documentation on what the endpoint actually does or returns. No OpenAPI schema, no request/response examples, and the docs pages are empty. The endpoint path and title ('Premium API Access' at /emails/48) give minimal clues about functionality.

Warnings

  • —No documentation available — docs, API, pricing, and README pages all show only 'Connect wallet' with no content
  • —No OpenAPI or output schema describing request parameters or response format
  • —The purpose of /api/v1/emails/48 is unclear — 'Premium API Access' is a generic label
  • —Cannot verify what data is actually returned without making a paid request

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-21 19:04:06Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-21
Last seen2026-04-25

Agent access

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