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/81/attachments

What it does

This endpoint at lowpaymentfee.com provides access to email attachments (specifically email ID 81) behind an x402 paywall. It accepts POST requests and returns JSON. Payment is settled in USDC on the Base network at $0.02 per call (maxAmountRequired of 20,000 base units with 6 decimals = $0.02).

The broader lowpaymentfee.com platform advertises a suite of x402-gated APIs spanning data analytics, AI/ML inference (sentiment analysis, summarization, classification, embeddings), finance/Web3 data (price feeds, exchange rates, token quotes, gas estimates), and infrastructure utilities (geocoding, validation, conversion, generation) — all priced at $0.02 per request with no API keys, no rate limits, and no commitments required.

This specific endpoint — `/api/v1/emails/81/attachments` — is not listed on the provider's landing page among the advertised API categories. Its purpose (retrieving attachments for a specific email) is unclear from the available documentation, which is extremely sparse. The docs, API, pricing, and README pages all render only a "Connect wallet" prompt with no further content. There is no OpenAPI spec, no request/response schema documentation, and no usage examples available.

Capabilities

x402-paymentusdc-baseemail-attachmentsmicropaymentpost-endpoint

Use cases

  • —Retrieving email attachments programmatically via micropayment
  • —Integrating pay-per-call email data access into agent workflows
  • —Accessing gated email content without API keys

Fit

Best for

  • —Agents needing one-off email attachment retrieval without subscription
  • —Developers experimenting with x402 micropayment protocols
  • —Workflows requiring keyless, pay-per-use email data access

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 management or sending

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/emails/81/attachments \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402_payment_token>"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/emails/81/attachments
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.25/ 1.00

The endpoint is live (returns a valid 402 x402 challenge), but documentation is essentially nonexistent — no OpenAPI spec, no request/response schema, no examples. The endpoint path (emails/81/attachments) is not listed among the provider's advertised APIs, making its purpose and data unclear. This is effectively a stub listing.

Warnings

  • —This specific endpoint (/api/v1/emails/81/attachments) is not listed among the provider's advertised APIs on the landing page — its purpose and data source are unknown.
  • —No documentation exists beyond the landing page; docs, API, pricing, and README pages all show only 'Connect wallet'.
  • —No OpenAPI spec, request schema, or response schema is available — request body format and response structure are entirely unknown.
  • —The endpoint targets a hardcoded email ID (81); it is unclear whether other email IDs are accessible or what data is returned.

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-21 19:19:57Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-21
Last seen2026-04-21

Agent access

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