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/87

What it does

This endpoint at lowpaymentfee.com provides premium API access to an email-related resource (specifically `/api/v1/emails/87`) via the x402 payment protocol. The endpoint is live and returns a 402 challenge requiring payment in USDC on the Base network. The cost per request is $0.02 (20,000 base units of USDC with 6 decimals). Payment is made via the x402 "exact" scheme to the specified wallet address, with no API keys or rate limits required.

The broader lowpaymentfee.com platform advertises a suite of pay-per-request 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 and settle on the Base network using USDC. However, the specific `/api/v1/emails/87` endpoint is not listed on the site's landing page among the advertised APIs, and no documentation describes what data it returns or what input it expects beyond a POST request with JSON content type.

Due to the lack of documentation, schema details, or examples for this specific endpoint, the actual functionality and response format are unknown. The endpoint is confirmed live via the 402 challenge, but users should be aware that there is no public documentation explaining what this email resource contains or how to structure a request body.

Capabilities

x402-paymentusdc-basepay-per-requestemail-datajson-apino-api-key

Use cases

  • —Retrieving email-related data behind a micropayment wall
  • —Programmatic access to premium email content without API key management
  • —Agent-driven data retrieval with automatic x402 payment settlement

Fit

Best for

  • —Agents or scripts that can handle x402 payment flows on Base
  • —Users who want keyless, pay-per-request access to email data
  • —Developers experimenting with x402 protocol integrations

Not for

  • —Users needing well-documented, schema-defined email APIs
  • —Bulk email retrieval at scale (no documented batch support)
  • —Anyone without a Base-compatible USDC wallet

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/emails/87 \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-token>"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/emails/87
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.25/ 1.00

The endpoint is live (402 challenge confirmed) and pricing is clear ($0.02 USDC on Base), but there is zero documentation for this specific /emails/87 resource—no input schema, no response schema, no examples, and the endpoint isn't even listed among the site's advertised APIs. This is effectively a stub listing.

Warnings

  • —The /api/v1/emails/87 endpoint is not listed among the provider's publicly advertised APIs on the landing page
  • —No documentation, request schema, or response schema exists for this endpoint
  • —The docs, pricing, API, and README pages all render only a 'Connect wallet' prompt with no useful content
  • —Actual functionality and data returned by this endpoint are completely unknown

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-21 19:19:33Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-21
Last seen2026-04-22

Agent access

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