x402-gated premium API endpoint on Base, pay-per-call with USDC.
What it does
This endpoint at lowpaymentfee.com is one of many x402-protocol-gated API endpoints offered by the provider. The specific resource `/api/v1/policies/84` is labeled "Premium API Access" and accepts POST requests, returning JSON responses. 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.
The broader lowpaymentfee.com platform hosts a catalog of pay-per-call endpoints spanning data & analytics (metrics, reports, data export, insights), AI & machine learning (sentiment analysis, text summarization, classification, embeddings), finance & Web3 (price feeds, exchange rates, token quotes, gas estimates), and infrastructure utilities (geocoding, validation, conversion, generation). All endpoints are uniformly priced at $0.02 per request.
However, the specific functionality behind `/api/v1/policies/84` is not documented beyond the generic "Premium API Access" label. There is no OpenAPI schema, no request/response examples, and the crawled docs, pricing, and API pages all returned only a "Connect wallet" prompt with no additional content. The endpoint is confirmed live (returns a proper 402 challenge), but what data or service it actually provides remains unclear.
Capabilities
Use cases
- —Programmatic access to a premium API resource with per-call USDC micropayments
- —Agent-driven workflows that need keyless, pay-as-you-go API access on Base
- —Integrating x402-compatible payment flows into automated pipelines
Fit
Best for
- —Developers already using x402 payment protocol
- —Agents with Base-network USDC wallets seeking low-friction API access
- —Use cases requiring no-signup, no-rate-limit API consumption
Not for
- —Users who need detailed documentation or known response schemas before integrating
- —Applications requiring free or fiat-settled API access
- —Production systems that need SLA guarantees or support
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/policies/84 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-proof>"Endpoint
Quality
The endpoint is confirmed live with a valid 402 challenge and clear pricing ($0.02 USDC on Base). However, there is no documentation of what the endpoint actually does, no request/response schema, no examples, and all doc pages returned only 'Connect wallet' with no content. The listing is effectively a stub.
Warnings
- —The specific functionality of /api/v1/policies/84 is completely undocumented — 'Premium API Access' is the only description available.
- —No OpenAPI schema, request format, or response examples are provided.
- —All documentation pages (docs, api, pricing, README) returned only a 'Connect wallet' prompt with no useful content.
- —The provider's broader catalog lists many endpoints but none match this specific /policies/84 path, making its purpose unclear.
Citations
- —Endpoint returns 402 with x402 challenge requiring USDC payment on Base networkhttps://lowpaymentfee.com/api/v1/policies/84
- —maxAmountRequired is 20000 base units of USDC (6 decimals) = $0.02https://lowpaymentfee.com/api/v1/policies/84
- —Platform advertises $0.02/request pricing with no API keys, no rate limits, and instant accesshttps://lowpaymentfee.com
- —USDC asset contract is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Basehttps://lowpaymentfee.com/api/v1/policies/84