Pay-per-call transaction receipt endpoint on Base via x402, settled in USDC at $0.02/request.
What it does
This x402-enabled endpoint at lowpaymentfee.com provides a "Premium API Access" transaction receipt resource. When called via POST, it returns a JSON receipt for transaction ID 3. Payment is settled on the Base network using USDC (contract 0x8335…2913) through the x402 exact-payment scheme.
The endpoint is live and returns a standard x402 402 challenge. The maximum amount required is 20,000 base units of USDC (6 decimals), which equals $0.02 per request. The provider's landing page confirms a flat $0.02/request pricing model across all their endpoints, with no API keys, no rate limits, and instant access.
The broader lowpaymentfee.com platform advertises multiple API categories including Data & Analytics, AI & Machine Learning, Finance & Web3, and Infrastructure utilities — all at the same $0.02 price point. However, this specific listing covers only the `/api/v1/transactions/3/receipt` endpoint. Documentation pages beyond the landing page returned only a "Connect wallet" prompt with no further technical detail, so the exact schema of the receipt response and the meaning of the transaction ID path parameter remain undocumented.
Capabilities
Use cases
- —Retrieving a transaction receipt via a single paid API call
- —Demonstrating x402 pay-per-call integration on Base
- —Agent-driven payment and data retrieval without API key management
Fit
Best for
- —Developers experimenting with x402 protocol payments
- —Agents that need keyless, pay-per-call API access on Base
- —Low-volume consumers who want no subscription or commitment
Not for
- —High-volume batch receipt retrieval (no documented bulk endpoint)
- —Users who need detailed API documentation or response schemas before integrating
- —Non-crypto users who cannot settle payments in USDC on Base
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/transactions/3/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, there is no OpenAPI schema, no response examples, and the documentation pages are empty beyond a wallet-connect prompt. The purpose and output of the receipt endpoint are not documented, making this effectively a stub listing.
Warnings
- —No OpenAPI or response schema available — the exact structure of the receipt response is unknown.
- —Documentation pages (/docs, /api, /pricing, /README) all returned only 'Connect wallet' with no usable content.
- —The endpoint path includes a hardcoded transaction ID (3); it is unclear whether other IDs are supported or what they represent.
- —The broader platform advertises many endpoints (AI, finance, utilities) but none have documented schemas.
Citations
- —The endpoint returns a 402 challenge with maxAmountRequired of 20000 base units of USDC on Base network.https://lowpaymentfee.com/api/v1/transactions/3/receipt
- —The platform charges $0.02 per request with no API keys, no rate limits, and instant access.https://lowpaymentfee.com
- —USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913.https://lowpaymentfee.com/api/v1/transactions/3/receipt