Download 2024-03 backup data via x402 micropayment on Base for $0.02 per request.
What it does
This endpoint at lowpaymentfee.com provides access to a downloadable backup file (2024-03) behind an x402 paywall. The endpoint accepts POST requests and returns application/json content. Payment is settled on the Base network using USDC (contract 0x8335…2913) at a cost of $0.02 per request (20,000 base units with 6 decimals). No API keys or rate limits are required — callers simply attach an X-PAYMENT header with a valid x402 payment proof.
lowpaymentfee.com hosts a broader suite of x402-gated APIs spanning data analytics, AI/ML inference, finance/Web3 data, and infrastructure utilities, all priced uniformly at $0.02 per call. This specific endpoint (/api/v1/backups/2024-03/download) appears to serve archived backup data from March 2024. The x402 challenge is live and returns a well-formed 402 response with version 1 of the protocol.
Documentation on the site is extremely thin — the docs, pricing, API, and README pages all render only a "Connect wallet" prompt with no substantive content. There is no OpenAPI schema, no request/response examples, and no description of what the backup data actually contains. Prospective callers should be aware that the exact payload structure and contents are unknown beyond the declared MIME type of application/json.
Capabilities
Use cases
- —Downloading archived backup data from March 2024 via a single micropayment
- —Programmatic retrieval of backup snapshots without API key management
- —Agent-driven data acquisition using x402 payment protocol on Base
Fit
Best for
- —Agents or scripts that need one-shot access to archived backup data
- —Users who prefer pay-per-request without subscriptions or API keys
- —x402-compatible wallets on the Base network
Not for
- —Users who need documentation or schema guarantees before calling
- —Bulk or streaming data access where per-request pricing is inefficient
- —Anyone without a Base-network USDC wallet
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/backups/2024-03/download \
-H "X-PAYMENT: <x402_payment_proof>" \
-H "Content-Type: application/json"Endpoint
Quality
The x402 challenge is live and well-formed, confirming the endpoint exists and accepts payment. However, there is no OpenAPI schema, no request/response examples, and the docs pages are empty stubs. The purpose and contents of the backup are undocumented, making this effectively a stub listing.
Warnings
- —No documentation available — docs, pricing, API, and README pages all show only 'Connect wallet'
- —No OpenAPI or request/response schema provided
- —Backup contents and structure are completely undocumented
- —Purpose of '2024-03 backup' is unclear — could be test/demo data
Citations
- —Endpoint returns HTTP 402 with x402 version 1 challenge requesting USDC on Basehttps://lowpaymentfee.com/api/v1/backups/2024-03/download
- —maxAmountRequired is 20000 base units of USDC (6 decimals) = $0.02https://lowpaymentfee.com/api/v1/backups/2024-03/download
- —All APIs on the site are priced at $0.02 per request with no API keys or rate limitshttps://lowpaymentfee.com
- —USDC asset contract is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base networkhttps://lowpaymentfee.com/api/v1/backups/2024-03/download