Transaction receipt retrieval on Base via x402 micropayment at $0.02 per request.
What it does
This endpoint at lowpaymentfee.com provides a "Premium API Access" transaction receipt resource, accessible via the x402 payment protocol on the Base network. The specific path `/api/v1/transactions/137/receipt` suggests it returns receipt data for transaction ID 137. Payment is settled in USDC (contract 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base) at a cost of $0.02 per request (20,000 base units with 6 decimals).
The broader lowpaymentfee.com platform advertises a suite of x402-gated APIs spanning data analytics, AI/ML inference (sentiment analysis, summarization, classification, embeddings), finance/Web3 data (price feeds, exchange rates, token quotes, gas estimates), and infrastructure utilities (geocoding, validation, conversion, generation) — all priced uniformly at $0.02 per call. The platform emphasizes no API keys, no rate limits, and instant access via the x402 payment header.
Documentation is extremely sparse: the /docs, /pricing, /api, and /README pages all render only a "Connect wallet" prompt with no further content. There is no OpenAPI schema, no request/response examples, and no detailed description of what the receipt endpoint actually returns. The endpoint is confirmed live (402 challenge captured), but the lack of documentation makes it difficult to know what payload to send or what response to expect.
Capabilities
Use cases
- —Retrieving transaction receipt data for a specific transaction ID via micropayment
- —Programmatic access to receipt records without API key registration
- —Agent-driven workflows that need on-demand transaction documentation
Fit
Best for
- —Developers wanting zero-signup, pay-per-call API access on Base
- —AI agents that can settle x402 USDC payments autonomously
- —Quick one-off transaction receipt lookups
Not for
- —Bulk or batch transaction receipt retrieval (no documented batch endpoint)
- —Users who need detailed API documentation or OpenAPI specs before integrating
- —Non-crypto users who cannot settle USDC payments on Base
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/transactions/137/receipt \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-token>"Endpoint
Quality
The endpoint is live and returns a valid x402 402 challenge, confirming it exists and accepts USDC on Base. However, documentation is essentially nonexistent — all doc pages show only 'Connect wallet'. There is no OpenAPI schema, no request/response examples, and no explanation of what the receipt endpoint returns or what input it expects. The listing description 'Premium API Access' is generic and uninformative.
Warnings
- —Documentation pages (/docs, /pricing, /api, /README) are all empty beyond a 'Connect wallet' prompt
- —No OpenAPI or schema available — request and response formats are unknown
- —The specific endpoint path (/api/v1/transactions/137/receipt) appears to be for a single hardcoded transaction ID; unclear if this generalizes
- —No examples of actual response data available
Citations
- —Endpoint returns 402 with x402 challenge advertising USDC on Base at maxAmountRequired 20000https://lowpaymentfee.com/api/v1/transactions/137/receipt
- —USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913https://lowpaymentfee.com/api/v1/transactions/137/receipt
- —Platform advertises $0.02 per request, no API keys, no rate limits, instant access on Base networkhttps://lowpaymentfee.com
- —Platform lists APIs across data/analytics, AI/ML, finance/Web3, and infrastructure categorieshttps://lowpaymentfee.com