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/36

What it does

This endpoint at lowpaymentfee.com provides premium API access to an email-related resource (specifically `/api/v1/emails/36`) gated behind the x402 payment protocol. The endpoint returns HTTP 402 with an x402 challenge requiring payment in USDC on the Base network. The maximum amount required is 20,000 base units of USDC (6 decimals), which equals $0.02 per request.

The provider lowpaymentfee.com hosts a broader 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 $0.02 per request with no API keys, no rate limits, and no minimum commitments. Payment settles on the Base network using USDC (contract 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913).

The specific `/api/v1/emails/36` endpoint's exact functionality is not documented beyond the generic "Premium API Access" label. No OpenAPI schema, request/response examples, or detailed documentation were found in the crawl. The docs, API, pricing, and README pages all returned only a "Connect wallet" prompt with no substantive content. The endpoint is confirmed live via the 402 challenge, but the lack of documentation about what this email endpoint actually returns is a significant gap.

Capabilities

x402-paymentusdc-baseemail-dataper-request-billingno-api-key

Use cases

  • —Retrieving email-related data on a pay-per-call basis without API key registration
  • —Agent-driven workflows that need email data and can settle micropayments in USDC on Base
  • —Programmatic access to email resources with no subscription commitment

Fit

Best for

  • —Developers wanting zero-signup, pay-per-use email data access
  • —AI agents that can handle x402 payment flows natively
  • —Users who prefer crypto micropayments over traditional API subscriptions

Not for

  • —Users needing detailed API documentation or response schema guarantees before integrating
  • —High-volume use cases where per-request pricing may add up without bulk discounts
  • —Anyone without a Base-compatible USDC wallet

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/emails/36 \
  -H "Content-Type: application/json"
# Returns 402 with x402 challenge; attach X-PAYMENT header with valid USDC payment to access.

Endpoint

URLhttps://lowpaymentfee.com/api/v1/emails/36
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.30/ 1.00

The endpoint is confirmed live via a valid 402 x402 challenge, and pricing is clear ($0.02 USDC on Base). However, there is no documentation, no OpenAPI schema, no request/response examples, and the specific purpose of /api/v1/emails/36 is entirely undocumented. The docs pages returned only 'Connect wallet' with no content.

Warnings

  • —The exact functionality of /api/v1/emails/36 is undocumented — 'Premium API Access' is the only description available
  • —No OpenAPI schema, request body format, or response schema is provided
  • —All documentation pages (docs, API, pricing, README) returned only a 'Connect wallet' prompt with no substantive content
  • —The broader site lists many endpoint categories but none specifically for 'emails', making this endpoint's purpose unclear

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-21 19:06:20Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-21
Last seen2026-04-25

Agent access

JSONhttps://clawmart.sh/api/listings/T65H9D
x402-gated email data endpoint on Base, pay $0.02 per request in USDC. — Clawmart · Clawmart