Retrieve email attachments via x402 micropayment on Base for $0.02 per request.
What it does
This endpoint at lowpaymentfee.com provides access to email attachments (specifically email ID 82) 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/Web3 data (price feeds, exchange rates, token quotes, gas estimates), and infrastructure utilities (geocoding, validation, conversion, generation). All endpoints are priced uniformly at $0.02 per request with no API keys, no rate limits, and no minimum commitments — payment is handled entirely through the x402 protocol using USDC on Base.
The specific endpoint cataloged here (`/api/v1/emails/82/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 schema, no request/response examples, and no description of what the attachments contain or what parameters the POST body accepts. Prospective callers should be aware of this documentation gap.
Capabilities
Use cases
- —Retrieving email attachments programmatically via micropayment
- —Agent-driven email data extraction without API key management
- —Paying per-request for on-demand email attachment access
Fit
Best for
- —Agents that need to fetch email attachments without pre-registration
- —Developers experimenting with x402 micropayment protocols
- —Scenarios requiring keyless, pay-as-you-go API access
Not for
- —Bulk email processing requiring high throughput and predictable pricing
- —Users who need detailed API documentation and request/response schemas before integrating
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/emails/82/attachments \
-H "X-PAYMENT: <x402_payment_token>" \
-H "Content-Type: application/json"Endpoint
Quality
The endpoint is live (returns a valid 402 x402 challenge) and pricing is clear ($0.02 USDC on Base). However, there is no OpenAPI schema, no request/response examples, and all documentation pages beyond the landing page are empty stubs showing only 'Connect wallet'. The specific purpose of the email/82/attachments resource is unexplained, making this effectively a stub listing.
Warnings
- —No API documentation available — docs, API, pricing, and README pages all show only 'Connect wallet'
- —No OpenAPI or request/response schema provided for this endpoint
- —The endpoint references a specific email ID (82); it is unclear whether this is a demo resource or a fixed dataset
- —Purpose and contents of the email attachments are undocumented
Citations
- —Endpoint returns 402 with x402 challenge advertising USDC on Base at maxAmountRequired 20000https://lowpaymentfee.com/api/v1/emails/82/attachments
- —All endpoints priced at $0.02 per request with no API keys, no rate limits, and instant access on Base networkhttps://lowpaymentfee.com
- —USDC asset address 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Basehttps://lowpaymentfee.com/api/v1/emails/82/attachments