Pay-per-call transaction receipt endpoint on Base via x402, settling in USDC at $0.02/request.
What it does
This endpoint at lowpaymentfee.com provides a transaction receipt retrieval service behind an x402 paywall. The specific resource `/api/v1/transactions/181/receipt` returns a receipt for transaction 181 in JSON format. Payment is settled on the Base network using USDC (contract 0x8335…2913) with a maximum cost of 20,000 base units, which equals $0.02 per request (USDC uses 6 decimals).
lowpaymentfee.com is a broader platform offering multiple x402-gated API categories including Data & Analytics (metrics, reports, data export, insights), AI & Machine Learning (sentiment analysis, text summarization, classification, embeddings), Finance & Web3 (price feeds, exchange rates, token quotes, gas estimates), and Infrastructure utilities (geocoding, validation, conversion, generation). All endpoints are listed at $0.02 per request with no API keys, no rate limits, and no minimum commitments required.
The probed endpoint is live, returning a proper x402 version 1 challenge with the `exact` payment scheme. The endpoint accepts POST requests and is marked as discoverable. Documentation pages (/docs, /api, /pricing, /README) all appear to require wallet connection and provide no additional technical detail, so the actual response schema and request body format for this specific receipt endpoint remain undocumented.
Capabilities
Use cases
- —Retrieving transaction receipts programmatically with per-call USDC payment
- —Integrating pay-per-use API access into agent workflows without API key management
- —Demonstrating x402 protocol payment flows on the Base network
Fit
Best for
- —Agents or applications that need on-demand transaction receipt data with no subscription
- —Developers exploring x402 protocol integrations on Base
- —Use cases requiring keyless, pay-as-you-go API access
Not for
- —High-volume batch retrieval where per-call pricing becomes expensive
- —Users who need detailed API documentation or response schema guarantees before integrating
- —Applications requiring non-crypto payment methods
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/transactions/181/receipt \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-token>"Endpoint
Quality
The endpoint is live and returns a valid x402 challenge, but there is no OpenAPI schema, no documented request/response format, and all documentation pages require wallet connection with no visible content. The specific purpose of 'transaction 181 receipt' is unclear, and no example responses are available.
Warnings
- —No OpenAPI or schema documentation available for request or response formats
- —All doc pages (/docs, /api, /pricing, /README) render only a 'Connect wallet' prompt with no technical content
- —The specific endpoint path references a hardcoded transaction ID (181), making it unclear how to generalize usage
- —The platform lists many API categories but no detailed documentation is accessible without wallet connection
Citations
- —The endpoint returns a 402 challenge with x402Version 1, exact scheme, on Base network, with maxAmountRequired of 20000 base units in USDChttps://lowpaymentfee.com/api/v1/transactions/181/receipt
- —All endpoints are priced at $0.02 per request with no API keys, no rate limits, and instant access on Base networkhttps://lowpaymentfee.com
- —The platform offers APIs across Data & Analytics, AI & Machine Learning, Finance & Web3, and Infrastructure categorieshttps://lowpaymentfee.com
- —USDC asset contract is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Basehttps://lowpaymentfee.com/api/v1/transactions/181/receipt