Pay-per-call transaction receipt endpoint on Base via x402, $0.02/request in USDC.
What it does
This endpoint at lowpaymentfee.com provides a "Premium API Access" receipt resource for transaction #153. It is part of a broader platform offering pay-per-request APIs across data/analytics, AI/ML, finance/Web3, and infrastructure categories—all priced at $0.02 per call with no API keys, no rate limits, and no commitments.
The endpoint is live and responds with an x402 payment challenge on Base network, accepting USDC (contract 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) with a maxAmountRequired of 20000 base units (i.e., $0.02 given USDC's 6 decimals). Payment is made via the x402 exact scheme, settling to address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3 with a 300-second timeout.
The specific functionality of this particular endpoint (transaction receipt retrieval) is not well-documented beyond the generic "Premium API Access" label. The platform's docs, pricing, and API pages all require wallet connection and provide no additional technical detail. The broader site advertises endpoints for metrics, reports, sentiment analysis, summarization, classification, embeddings, price feeds, exchange rates, geocoding, validation, conversion, and generation—all at the same $0.02 price point.
Capabilities
Use cases
- —Retrieving a transaction receipt behind a micropayment wall
- —Demonstrating x402 protocol payment flows on Base
- —Agent-initiated paid API calls without API key management
Fit
Best for
- —Developers exploring x402 payment protocol integrations
- —Agents needing keyless, pay-per-use API access on Base
- —Low-cost micropayment API consumption without subscriptions
Not for
- —Users needing detailed API documentation or schemas before purchasing
- —High-volume batch processing where per-call pricing adds up
- —Users without USDC on Base network
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/transactions/153/receipt \
-H "X-PAYMENT: <x402_payment_token>" \
-H "Content-Type: application/json"Endpoint
Quality
The endpoint is live (402 challenge confirmed) and pricing is clear ($0.02 USDC on Base), but there is no documentation on request/response schemas, no OpenAPI spec, and the specific purpose of this 'transaction receipt' endpoint is unclear. Docs pages require wallet connection and yield no content.
Warnings
- —No API documentation available—all doc pages require wallet connection and show no content
- —The specific functionality of '/api/v1/transactions/153/receipt' is undocumented beyond the generic 'Premium API Access' label
- —No request or response schema provided; callers cannot know what to send or expect back
- —Platform appears to be a demonstration or early-stage project with minimal documentation
Citations
- —Endpoint returns 402 with x402 challenge accepting USDC on Base network at maxAmountRequired 20000 (=$0.02)https://lowpaymentfee.com/api/v1/transactions/153/receipt
- —Platform advertises $0.02/request pricing with no API keys, no rate limits, instant access on Base networkhttps://lowpaymentfee.com
- —USDC asset contract is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913https://lowpaymentfee.com/api/v1/transactions/153/receipt