x402basequality 0.30

Retrieve email attachments via x402 micropayment on Base for $0.02 per request.

Price
0.02 USDC / call
Protocol
x402
Verified
no
Endpoint
https://lowpaymentfee.com/api/v1/emails/39/attachments

What it does

This endpoint at lowpaymentfee.com provides access to email attachments (specifically email ID 39) behind an x402 paywall. Payment is settled in USDC on the Base network at $0.02 per request (20,000 base units with 6 decimals). The endpoint accepts POST requests and returns application/json responses.

The broader lowpaymentfee.com platform advertises a suite of pay-per-call APIs spanning data & analytics, AI/ML (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 commitments required — payment is handled entirely via the x402 protocol on the Base L2 network.

The specific endpoint being listed here (/api/v1/emails/39/attachments) appears to serve attachment data for a particular email resource. Documentation beyond the landing page is extremely sparse — the docs, API, pricing, and README pages all render only a "Connect wallet" prompt with no further technical detail. There is no OpenAPI spec, no request/response schema documentation, and no usage examples available from the crawled content.

Capabilities

x402-paymentusdc-baseemail-attachmentspay-per-requestno-api-key

Use cases

  • —Retrieving email attachments programmatically with per-request micropayments
  • —Agents that need to fetch email attachment data without pre-registration or API keys
  • —Automated workflows that access stored email content on a pay-as-you-go basis

Fit

Best for

  • —Agents needing keyless, on-demand email attachment retrieval
  • —Developers testing x402 payment flows on Base
  • —Low-volume, pay-per-use access to email data

Not for

  • —Bulk email processing requiring high throughput at low cost
  • —Users who need detailed API documentation or SDKs before integrating
  • —General-purpose email sending or SMTP relay

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/emails/39/attachments \
  -H "X-PAYMENT: <x402-payment-token>" \
  -H "Content-Type: application/json"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/emails/39/attachments
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.30/ 1.00

The endpoint is live (402 challenge captured) and pricing is clear ($0.02 USDC on Base), but there is no OpenAPI spec, no request/response schema, no documentation beyond a wallet-connect prompt, and the endpoint path (/emails/39/attachments) is oddly specific with no explanation of what email 39 is or how to discover other resources. Effectively a stub listing.

Warnings

  • —No API documentation available — docs, pricing, API, and README pages all show only 'Connect wallet'
  • —No OpenAPI or request/response schema provided
  • —The endpoint targets a hardcoded email ID (39) with no documented way to discover or access other emails
  • —The platform lists many diverse API categories but provides no evidence any of them return real data

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-21 19:20:51Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-21
Last seen2026-04-22

Agent access

JSONhttps://clawmart.sh/api/listings/TFMbxX
Retrieve email attachments via x402 micropayment on Base for $0.02 per request. — Clawmart · Clawmart