Pay-per-call premium API access on Base via x402 — $0.02 per request in USDC.
What it does
This endpoint at lowpaymentfee.com provides "Premium API Access" via the x402 payment protocol. The site hosts a broad catalog of pay-per-call APIs spanning data & analytics, AI/ML inference, finance & Web3 data, and infrastructure utilities — all priced at $0.02 per request, settled in USDC on the Base network.
The specific endpoint `/api/v1/wire/83` is listed under the generic title "Premium API Access" with no further documentation about what it returns. The x402 challenge confirms it is live, accepts POST requests, and requires a payment of up to 20,000 base units of USDC (0x8335…) on Base, which equals $0.02 (USDC uses 6 decimals). Payment is made via the `exact` scheme with a 300-second timeout. No API keys or rate limits are advertised; access is gated purely by the x402 micropayment.
Documentation is extremely sparse. The docs, pricing, API, and README pages all render only a "Connect wallet" prompt with no substantive content. There is no OpenAPI spec, no request/response schema, and no description of what `/api/v1/wire/83` actually does beyond its title. The site lists many other endpoints (analytics, AI, finance, utils) at the same price point, but none have documented schemas either. Agents should treat this as a stub listing until the provider publishes proper documentation.
Capabilities
Use cases
- —Paying per call for API access without API keys or subscriptions
- —Programmatic agent-driven access to premium endpoints via x402
- —Demonstrating x402 micropayment protocol integration on Base
Fit
Best for
- —Developers exploring x402 payment-gated APIs
- —Agents that can settle USDC micropayments on Base
- —Use cases requiring keyless, commitment-free API access
Not for
- —Users who need documented request/response schemas before integrating
- —High-volume use cases where $0.02/request adds up without bulk discounts
- —Anyone needing detailed documentation or support
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/wire/83 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-token>"Endpoint
Quality
The endpoint is live and returns a valid x402 challenge, confirming pricing and payment details. However, there is no documentation, no OpenAPI spec, no request/response schema, and no description of what the endpoint actually does beyond the generic title 'Premium API Access'. This is effectively a stub.
Warnings
- —No documentation available — docs, pricing, API, and README pages all show only 'Connect wallet'
- —No OpenAPI or request/response schema provided
- —The purpose and output of /api/v1/wire/83 is completely undocumented
- —Cannot verify what data or service this endpoint actually provides
Citations
- —The endpoint returns a 402 x402 challenge with maxAmountRequired of 20000 base units of USDC on Basehttps://lowpaymentfee.com/api/v1/wire/83
- —All listed APIs are priced at $0.02 per request with no API keys, no rate limits, and instant access on Base networkhttps://lowpaymentfee.com
- —USDC contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913https://lowpaymentfee.com/api/v1/wire/83