Pay-per-call premium API access on Base via x402 — $0.02/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-request 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/152` is listed as "Premium API Access" and accepts POST requests. The x402 challenge confirms it is live, requiring a maximum of 20,000 base units of USDC (0x8335…2913 on Base, 6 decimals → $0.02) per call. Payment is made via the x402 `exact` scheme to the payTo address. No API keys or rate limits are advertised; access is gated purely by per-request micropayment.
However, the actual functionality behind this particular `/api/v1/wire/152` endpoint is unclear. The site's landing page lists many named endpoints (metrics, sentiment analysis, summarization, geocoding, etc.) but does not specifically describe what `wire/152` returns. The docs, pricing, and README pages all rendered only a "Connect wallet" prompt with no additional documentation. Without a schema for the request body or a sample response, the concrete capability of this endpoint cannot be confirmed from available materials.
Capabilities
Use cases
- —Programmatic access to a premium API endpoint with no API key or subscription required
- —Agent-driven workflows that need on-demand, pay-as-you-go API calls settled in USDC on Base
- —Testing x402 micropayment integrations against a live endpoint
Fit
Best for
- —Developers or agents wanting zero-commitment, per-request API access
- —x402-compatible wallets and agent frameworks on Base
- —Use cases where avoiding API key management is valuable
Not for
- —Users who need detailed documentation or guaranteed SLAs before calling
- —High-volume batch processing where per-request pricing may add up
- —Anyone unable to pay in USDC on the Base network
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/wire/152 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-header>" \
-d '{}'Endpoint
Quality
The endpoint is live and returns a valid x402 402 challenge, confirming pricing and payment details. However, there is no documentation, no request/response schema, and no indication of what this specific endpoint actually does beyond the generic label "Premium API Access". The docs and other pages returned only wallet-connect prompts with no content.
Warnings
- —The actual functionality of /api/v1/wire/152 is unknown — no documentation or schema is available.
- —All documentation pages (docs, pricing, README, api) returned only a 'Connect wallet' prompt with no useful content.
- —No OpenAPI spec, no request body schema, and no example responses are available.
- —The site lists many endpoints but wire/152 does not appear in the public catalog — its purpose is unclear.
Citations
- —The endpoint returns a valid x402 challenge with maxAmountRequired of 20000 base units of USDC on Basehttps://lowpaymentfee.com/api/v1/wire/152
- —All listed APIs are priced at $0.02 per request with no API keys, no rate limits, and instant access on the Base networkhttps://lowpaymentfee.com
- —USDC asset address on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913https://lowpaymentfee.com/api/v1/wire/152