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/68/attachments

What it does

This endpoint at lowpaymentfee.com provides access to email attachments (specifically email ID 68) 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 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 endpoints share the same $0.02/request pricing with no API keys, no rate limits, and no minimum commitments.

Documentation is extremely sparse — the /docs, /pricing, /api, 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 example payloads available. The specific purpose of the email attachments endpoint (what data it returns, what input it expects) is unclear from the available material. The x402 challenge is live and well-formed, confirming the endpoint is operational.

Capabilities

x402-paymentusdc-baseemail-attachmentsmicropaymentpost-endpointjson-response

Use cases

  • —Programmatically retrieving email attachments via micropayment
  • —Agent-driven access to stored email data without API key management
  • —Pay-per-request email attachment downloads on Base network

Fit

Best for

  • —Agents needing on-demand email attachment retrieval without subscription
  • —Developers experimenting with x402 payment flows
  • —Use cases requiring keyless, pay-per-call API access

Not for

  • —Bulk email processing (no documented batch support)
  • —Users who need detailed API documentation or guaranteed SLAs
  • —Non-crypto payment workflows

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/emails/68/attachments \
  -H "X-PAYMENT: <x402_payment_token>" \
  -H "Content-Type: application/json"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/emails/68/attachments
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.30/ 1.00

The x402 challenge is live and well-formed, confirming the endpoint works. However, there is no OpenAPI spec, no request/response schema, no documentation beyond a wallet-connect prompt, and the specific purpose of this email attachments endpoint is unclear. The listing is effectively a stub.

Warnings

  • —No API documentation available — /docs, /pricing, /api, and /README pages all show only 'Connect wallet'
  • —No OpenAPI or schema definition found for request or response payloads
  • —The specific function of /api/v1/emails/68/attachments is unclear — it may be a demo or placeholder endpoint
  • —No examples of expected input or output are available

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-21 19:23:04Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-21
Last seen2026-04-22

Agent access

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