x402-gated premium API access on Base, pay $0.02 per request in USDC.
What it does
This endpoint at lowpaymentfee.com is part of a broader platform offering pay-per-request APIs across data & analytics, AI & machine learning, finance & Web3, and infrastructure categories. The specific endpoint `/api/v1/policies/26` is labeled "Premium API Access" and is gated via the x402 protocol on the Base network, accepting USDC payments.
The x402 challenge confirms the endpoint is live and requires a maximum of 20,000 base units of USDC (0x8335…2913 on Base), which equals $0.02 per request (USDC uses 6 decimals). Payment is made via the `exact` scheme to address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3 with a 300-second timeout. The endpoint accepts POST requests and returns application/json.
The platform advertises no API keys, no rate limits, and instant access. However, documentation beyond the landing page is essentially empty (all sub-pages just show "Connect wallet"), so the actual request/response schema for this specific endpoint is unknown. There is no OpenAPI spec, no example payloads, and no detailed documentation available. The endpoint's purpose — what "Premium API Access" actually returns — is not described anywhere in the crawled material.
Capabilities
Use cases
- —Accessing gated API resources without API keys via x402 micropayments
- —Programmatic pay-per-request access from AI agents on Base network
- —Integrating low-cost premium data or services into automated workflows
Fit
Best for
- —Developers wanting keyless, pay-per-use API access
- —AI agents with x402-compatible payment capabilities
- —Users who prefer crypto micropayments over subscription billing
Not for
- —Users needing detailed API documentation before integrating
- —Applications requiring non-crypto payment methods
- —High-volume use cases where per-request pricing may not be economical
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/policies/26 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-header>"Endpoint
Quality
The endpoint is live and returns a valid x402 challenge with clear pricing, but there is zero documentation on what this endpoint actually does, no request/response schema, and no examples. All doc pages return only 'Connect wallet'. The purpose of 'Premium API Access' at /api/v1/policies/26 is entirely opaque.
Warnings
- —No documentation available — all doc/pricing/API pages show only 'Connect wallet'
- —No OpenAPI spec or request/response schema provided
- —The specific purpose of /api/v1/policies/26 ('Premium API Access') is undocumented and unclear
- —Cannot verify what data or service is returned after payment
Citations
- —The endpoint returns a 402 x402 challenge with maxAmountRequired of 20000 base units of USDC on Basehttps://lowpaymentfee.com/api/v1/policies/26
- —Platform advertises $0.02/request pricing with no API keys, no rate limits, and instant accesshttps://lowpaymentfee.com
- —USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913https://lowpaymentfee.com/api/v1/policies/26