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/48/attachments

What it does

This endpoint at lowpaymentfee.com provides access to email attachments (specifically email ID 48) 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 inference (sentiment analysis, summarization, classification, embeddings), finance and crypto data feeds, and infrastructure utilities — all priced at $0.02 per request with no API keys, no rate limits, and no commitments required. However, this specific listing is for the email attachments endpoint (`/api/v1/emails/48/attachments`), which is not prominently featured on the site's landing page among the advertised API categories.

Documentation is extremely sparse. The docs, API, pricing, and README pages all render only a "Connect wallet" prompt with no substantive content. There is no OpenAPI schema, no request/response examples, and no description of what the email attachments endpoint actually returns or what parameters it accepts. The endpoint is confirmed live via a valid x402 402 challenge, but the actual functionality and data behind it remain unclear.

Capabilities

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

Use cases

  • —Retrieving email attachments programmatically via micropayment
  • —Integrating email data access into agent workflows without API key management
  • —Paying per-request for on-demand email attachment retrieval

Fit

Best for

  • —Agents needing one-off email attachment retrieval without subscription overhead
  • —Developers experimenting with x402 payment protocol integrations
  • —Workflows requiring keyless, pay-as-you-go API access

Not for

  • —Bulk email processing or high-volume attachment downloads (no documented batch support)
  • —Users who need detailed API documentation or guaranteed SLAs
  • —Use cases requiring non-USDC or non-Base payment rails

Quick start

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

Endpoint

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

Quality

0.25/ 1.00

The endpoint is live (valid x402 402 challenge captured), but documentation is essentially nonexistent — no OpenAPI schema, no request/response examples, no explanation of what the endpoint returns. The email attachments path is not listed among the site's advertised APIs, making its purpose unclear. This is effectively a stub listing.

Warnings

  • —No documentation available — docs, API, pricing, and README pages all show only 'Connect wallet' with no content.
  • —This specific endpoint (/api/v1/emails/48/attachments) is not listed among the site's advertised APIs, raising questions about its intended use.
  • —No request or response schema is available; input parameters and output format are unknown.
  • —The endpoint references a hardcoded email ID (48), suggesting it may be a demo or test resource rather than a general-purpose API.

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-21 19:17:52Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-21
Last seen2026-04-22

Agent access

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