x402-gated loan data endpoint on Base, pay-per-request with USDC.
What it does
This endpoint at lowpaymentfee.com provides access to a specific loan resource (loan ID 22) via the x402 payment protocol. The endpoint is live and returns a 402 challenge requiring payment in USDC on the Base network. The maximum amount required is 20,000 base units of USDC (6 decimals), which equates to $0.02 per request.
The hosting site lowpaymentfee.com offers a broad catalog of x402-gated APIs spanning data & analytics, AI/ML inference, finance & Web3, and infrastructure utilities — all priced at $0.02 per request. This particular endpoint (/api/v1/loans/22) is not listed on the site's main catalog page, so its exact response payload is unclear. The title "Premium API Access" and the path suggest it returns data about a specific loan entity, but no schema or example response is documented.
Payment is handled entirely via the x402 protocol: no API keys, no rate limits, and no account registration. Callers attach an X-PAYMENT header with a signed USDC payment on Base. The endpoint accepts POST requests and returns application/json. The pay-to address is 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3 with a 300-second payment timeout.
Capabilities
Use cases
- —Fetching loan details programmatically with per-request USDC micropayments
- —Integrating loan data into agent workflows without API key management
- —Accessing financial data via crypto-native pay-as-you-go billing
Fit
Best for
- —Agents or bots that need on-demand loan data without subscription commitments
- —Developers experimenting with x402 payment protocol integrations
- —Crypto-native applications on Base that want frictionless API access
Not for
- —Users who need bulk loan data at scale (no documented batch endpoints)
- —Anyone without a Base-compatible USDC wallet
- —Use cases requiring detailed documentation or guaranteed SLAs
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/loans/22 \
-H "X-PAYMENT: <signed-x402-payment-header>" \
-H "Content-Type: application/json"Endpoint
Quality
The endpoint is live (402 challenge confirmed) and pricing is clear ($0.02 USDC on Base), but there is no documentation for this specific loan endpoint — no request schema, no response schema, no examples. The crawled docs/pricing/API pages all returned only 'Connect wallet' with no useful content. The endpoint path (/api/v1/loans/22) is not listed in the site's public catalog, making its purpose and output speculative.
Warnings
- —No documentation available for /api/v1/loans/22 — endpoint is not listed in the site's public API catalog
- —No request or response schema provided; payload structure is unknown
- —Docs, pricing, API, and README pages all returned only 'Connect wallet' with no substantive content
- —The endpoint targets a hardcoded loan ID (22); unclear if other loan IDs are available or how to discover them
Citations
- —The endpoint returns a 402 challenge requiring USDC payment on Base with maxAmountRequired of 20000 base units ($0.02)https://lowpaymentfee.com/api/v1/loans/22
- —The site advertises $0.02 per request pricing with no API keys, no rate limits, and instant access on Base networkhttps://lowpaymentfee.com
- —USDC asset address is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Basehttps://lowpaymentfee.com/api/v1/loans/22