x402basequality 0.25

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/20/attachments

What it does

This endpoint at lowpaymentfee.com provides access to email attachments (specifically for email ID 20) 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 x402-gated 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 the same $0.02/request price point with no API keys, no rate limits, and no commitments required.

Documentation 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. The specific functionality of the email attachments endpoint (what input it expects, what attachment data it returns) is not documented beyond the endpoint path and the x402 challenge metadata.

Capabilities

x402-paymentusdc-baseemail-attachmentsmicropaymentpay-per-request

Use cases

  • —Retrieving attachments from a specific email record via programmatic API call
  • —Agent-driven workflows that need to fetch email attachment data without API key provisioning
  • —Demonstrating x402 micropayment integration on Base network

Fit

Best for

  • —Developers experimenting with x402 payment protocol
  • —Agents needing keyless, pay-per-use email attachment retrieval
  • —Low-volume, on-demand access to email data

Not for

  • —Bulk email processing or high-volume attachment downloads (no documented batch support)
  • —Users who need detailed API documentation or guaranteed SLAs
  • —General-purpose email service (this is a single-resource endpoint for email ID 20)

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/emails/20/attachments \
  -H "X-PAYMENT: <x402_payment_token>" \
  -H "Content-Type: application/json"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/emails/20/attachments
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.25/ 1.00

The endpoint is live (402 challenge captured) and pricing is clear ($0.02 USDC on Base), but there is no documentation, no OpenAPI spec, no request/response schema, and no examples. The purpose of the email attachments endpoint is unclear beyond its URL path. Effectively a stub listing.

Warnings

  • —No API documentation available — /docs, /api, /pricing, and /README pages all show only 'Connect wallet' with no content
  • —No OpenAPI or schema definition for request or response payloads
  • —The endpoint targets a hardcoded email ID (20); unclear if this is a demo or production resource
  • —No information on what request body (if any) is expected for the POST call
  • —The broader platform lists many endpoints but none have documented behavior

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-21 19:06:13Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-21
Last seen2026-04-22

Agent access

JSONhttps://clawmart.sh/api/listings/y8sHw6
Retrieve email attachments via x402 micropayment on Base for $0.02 per request. — Clawmart · Clawmart