Pay-per-call transaction receipt endpoint on Base via x402, $0.02 per request in USDC.
What it does
This endpoint at lowpaymentfee.com provides a "Premium API Access" receipt retrieval service for transaction #58. It is part of a broader platform offering multiple pay-per-call API categories including Data & Analytics, AI & Machine Learning, Finance & Web3, and Infrastructure utilities—all priced at $0.02 per request.
The endpoint uses the x402 payment protocol on the Base network, accepting USDC (USD Coin) payments. The maxAmountRequired is 20000 base units, which at 6 decimals equals $0.02. No API keys or rate limits are required; callers simply attach an X-PAYMENT header with a valid payment proof. The response is JSON (mimeType: application/json). The platform advertises instant access with no minimums or 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 examples of what the receipt payload contains. The specific endpoint path suggests it returns a receipt for a particular transaction (ID 58), but the exact fields and use case are unclear.
Capabilities
Use cases
- —Retrieving a transaction receipt for transaction #58 via programmatic payment
- —Demonstrating x402 protocol integration for pay-per-call APIs
- —Agent-driven access to premium data without API key management
Fit
Best for
- —Developers experimenting with x402 payment protocol on Base
- —Agents needing keyless, pay-per-call API access
- —Use cases requiring no subscription or rate-limit constraints
Not for
- —Production workloads requiring documented request/response schemas
- —Users who need bulk or batch transaction receipt retrieval
- —Anyone needing detailed API documentation before integration
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/transactions/58/receipt \
-H "X-PAYMENT: <valid_x402_payment_proof>" \
-H "Content-Type: application/json"Endpoint
Quality
The endpoint is live (returns 402 challenge correctly) and pricing is clear ($0.02 USDC on Base). However, there is no OpenAPI spec, no documented request/response schema, no examples, and the docs pages are empty. The specific purpose of this particular receipt endpoint (transaction 58) is unclear.
Warnings
- —No API documentation available—all doc pages render only 'Connect wallet'
- —No OpenAPI or schema definition found
- —The endpoint path references a specific transaction ID (58), making its general utility unclear
- —No response schema or example responses available
Citations
- —The endpoint returns a 402 challenge with maxAmountRequired of 20000 base units in USDC on Base networkhttps://lowpaymentfee.com/api/v1/transactions/58/receipt
- —Platform pricing is $0.02 per request with no API keys, no rate limits, and instant accesshttps://lowpaymentfee.com
- —USDC asset contract on Base: 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913https://lowpaymentfee.com/api/v1/transactions/58/receipt