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 specific resource path `/api/v1/wire/85` is one of many endpoints offered by the provider, which hosts a broad catalog spanning data & analytics, AI & machine learning, finance & Web3, and infrastructure utilities — all priced at $0.02 per request.
Payment is settled on the Base network using USDC (contract 0x8335…2913) with the x402 "exact" scheme. The maximum amount required per call is 20,000 base units, which at 6 decimals equals $0.02 USD. No API keys or rate limits are advertised; callers simply attach an X-PAYMENT header with a valid x402 payment proof. The endpoint accepts HTTP POST requests and returns application/json responses.
The provider's landing page lists sibling endpoints for sentiment analysis, text summarization, classification, embeddings, price feeds, exchange rates, geocoding, validation, conversion, and more — all at the same $0.02 price point. However, the specific functionality behind `/api/v1/wire/85` is not documented beyond the generic label "Premium API Access," and the docs, pricing, and README pages all resolve to a minimal "Connect wallet" prompt with no further technical detail. Without an OpenAPI spec, request/response schemas, or usage examples, the exact input/output contract for this particular endpoint remains unclear.
Capabilities
Use cases
- —Programmatic access to a pay-per-call API without requiring API keys or subscriptions
- —Agent-driven workflows that need on-demand API calls settled in USDC on Base
- —Testing x402 payment protocol integrations against a live endpoint
Fit
Best for
- —Developers exploring x402 payment-gated APIs
- —Agents that can autonomously pay per request via crypto
- —Users who want no-signup, no-rate-limit API access
Not for
- —Users who need detailed API documentation or guaranteed SLAs
- —Anyone requiring non-crypto (fiat) payment methods
- —Use cases that need to understand the exact request/response schema before calling
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/wire/85 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402_payment_proof>" \
-d '{}'Endpoint
Quality
The endpoint is live (402 challenge confirmed) and pricing is clear ($0.02 USDC on Base), but there is no OpenAPI spec, no request/response schema, no documentation beyond a generic label, and no examples. The actual functionality of /api/v1/wire/85 is unknown — it could be any of the advertised services or something else entirely.
Warnings
- —The specific functionality of /api/v1/wire/85 is undocumented — 'Premium API Access' is a generic label with no further detail.
- —No OpenAPI spec, request schema, or response schema is available.
- —All documentation pages (docs, pricing, README, api) resolve to a minimal 'Connect wallet' page with no technical content.
- —The provider lists many endpoint categories (AI, finance, analytics, etc.) but it is unclear which, if any, map to this specific wire/85 path.
Citations
- —The endpoint returns a 402 challenge with x402Version 1, exact scheme, on Base network, requiring 20000 base units of USDC (0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913).https://lowpaymentfee.com/api/v1/wire/85
- —All listed APIs are priced at $0.02 per request with no API keys, no rate limits, and instant access on the Base network.https://lowpaymentfee.com
- —The provider offers endpoints across Data & Analytics, AI & Machine Learning, Finance & Web3, and Infrastructure categories.https://lowpaymentfee.com