Transaction receipt retrieval via x402 micropayment on Base network for $0.02 per request.
What it does
This endpoint at lowpaymentfee.com provides access to a transaction receipt (resource `/api/v1/transactions/356/receipt`) behind an x402 paywall. The provider operates a broader platform offering numerous pay-per-call API endpoints across categories including data analytics, AI/ML inference, finance/Web3 data, and infrastructure utilities — all priced at $0.02 per request and settled in USDC on the Base network.
The specific endpoint probed returns a 402 challenge requesting payment of up to 20,000 base units of USDC (0x8335…2913 on Base), which equals $0.02 USD (USDC uses 6 decimals). Payment is made via the x402 exact scheme with no API keys or rate limits required. The response MIME type is `application/json`. The endpoint accepts POST requests and is discoverable.
Documentation on the site 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 usage examples available. The nature of the "receipt" data returned is not documented beyond the endpoint path and generic "Premium API Access" label.
Capabilities
Use cases
- —Retrieving a transaction receipt for transaction ID 356 via micropayment
- —Demonstrating x402 protocol payment flow on Base network
- —Programmatic access to receipt data without API key registration
Fit
Best for
- —Developers experimenting with x402 payment protocol
- —Agents needing on-demand transaction receipt data without subscription
- —Use cases requiring keyless, pay-per-call API access on Base
Not for
- —Bulk or high-volume receipt retrieval (no documented batch endpoint)
- —Users who need detailed API documentation or response schema guarantees
- —Non-crypto users who cannot pay in USDC on Base network
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/transactions/356/receipt \
-H "X-PAYMENT: <x402-payment-token>" \
-H "Content-Type: application/json"Endpoint
Quality
The endpoint is live and returns a valid x402 402 challenge with clear pricing. However, documentation is essentially absent — no OpenAPI spec, no request/response schemas, no examples, and no explanation of what data the receipt contains. The docs/pricing/API pages all show only 'Connect wallet' with no content. This is effectively a stub listing.
Warnings
- —No API documentation available — docs, pricing, API, and README pages all render only 'Connect wallet'
- —No OpenAPI or output schema provided; response structure is unknown
- —This endpoint is for a specific transaction ID (356); it is unclear whether other transaction IDs are supported or how to discover them
- —The broader platform advertises many endpoints but none have documented schemas
Citations
- —The endpoint returns a 402 challenge with maxAmountRequired of 20000 base units of USDC on Base networkhttps://lowpaymentfee.com/api/v1/transactions/356/receipt
- —USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913https://lowpaymentfee.com/api/v1/transactions/356/receipt
- —All endpoints priced at $0.02 per request with no API keys, no rate limits, and instant access on Base networkhttps://lowpaymentfee.com
- —The platform offers endpoints across Data & Analytics, AI & ML, Finance & Web3, and Infrastructure categorieshttps://lowpaymentfee.com