Transaction receipt endpoint on Base, paid per-call via x402 with USDC.
What it does
This endpoint at lowpaymentfee.com provides access to a transaction receipt (resource ID 183) behind an x402 paywall. The broader lowpaymentfee.com platform advertises a suite of APIs spanning data & analytics, AI/ML inference (sentiment analysis, summarization, classification, embeddings), finance & Web3 (price feeds, exchange rates, token quotes, gas estimates), and infrastructure utilities (geocoding, validation, conversion, generation) — all priced at $0.02 per request with no API keys, no rate limits, and no commitments.
The specific endpoint probed (`/api/v1/transactions/183/receipt`) returns a valid x402 challenge on POST, accepting payment in USDC on the Base network. The maxAmountRequired is 20,000 base units of USDC (6 decimals), which equals $0.02 per call. Payment is made via the x402 "exact" scheme to the specified wallet address, with a 300-second timeout. The response MIME type is application/json.
Documentation is extremely sparse — the /docs, /api, /pricing, and /README pages all render only a "Connect wallet" prompt with no further content. There is no OpenAPI spec, no request/response schema documentation, and no examples of what the receipt payload actually contains. The platform's landing page confirms the pricing model and lists available endpoints, but provides no technical detail about request parameters or response structures.
Capabilities
Use cases
- —Retrieving a transaction receipt for resource ID 183 via a single micropayment
- —Demonstrating x402 protocol integration for pay-per-call APIs
- —Agent-driven programmatic access to paid data without API key management
Fit
Best for
- —Developers experimenting with x402 payment protocol
- —Agents that need keyless, pay-per-call API access on Base
- —Use cases requiring low-cost ($0.02) per-request pricing with USDC
Not for
- —Users needing detailed API documentation or response schema guarantees
- —High-volume batch processing where per-call crypto payments add overhead
- —Anyone without a Base-compatible USDC wallet
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/transactions/183/receipt \
-H "X-PAYMENT: <x402-payment-token>" \
-H "Content-Type: application/json"Endpoint
Quality
The endpoint is live and returns a valid x402 challenge with clear pricing ($0.02 USDC on Base). However, there is no OpenAPI spec, no documentation of request parameters or response schema, and the docs/pricing/README pages are all blank beyond a wallet connect prompt. The specific purpose of 'transaction 183 receipt' is unexplained. This is effectively a stub listing.
Warnings
- —No OpenAPI or schema documentation available — response structure is unknown
- —All documentation pages (/docs, /api, /pricing, /README) render only 'Connect wallet' with no content
- —The specific resource '/api/v1/transactions/183/receipt' is not listed among the platform's advertised endpoints — its purpose is unclear
- —No examples of request body or response payload exist in any crawled material
Citations
- —The endpoint returns a valid x402 challenge with maxAmountRequired of 20000 base units of USDC on Base networkhttps://lowpaymentfee.com/api/v1/transactions/183/receipt
- —The platform advertises $0.02 per request pricing with no API keys, no rate limits, and instant accesshttps://lowpaymentfee.com
- —The platform lists APIs across Data & Analytics, AI & ML, Finance & Web3, and Infrastructure categorieshttps://lowpaymentfee.com
- —Documentation pages render only a 'Connect wallet' prompt with no further contenthttps://lowpaymentfee.com/docs