Pay-per-call API suite on Base (USDC) covering analytics, AI, finance, and utilities at $0.02/request.
What it does
lowpaymentfee.com hosts a collection of x402-enabled API endpoints spanning four categories: 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 priced at $0.02 per request, paid in USDC on the Base network via the x402 protocol — no API keys, no rate limits, and no upfront commitments.
The specific endpoint at `/api/v1/wire/99` is listed as "Premium API Access." Its x402 challenge confirms it is live, accepting POST requests and requiring payment of up to 20,000 base units of USDC (0x8335…2913 on Base), which equals $0.02 given USDC's 6 decimals. Payment is settled on-chain to address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3 with a 300-second timeout.
Documentation is extremely sparse — the /docs, /api, /pricing, and /README pages all render only a "Connect wallet" prompt with no further content. There is no OpenAPI spec, no request/response schema documentation, and no examples of what the `/api/v1/wire/99` endpoint actually returns. The landing page lists many endpoints but provides no detail on input parameters or response formats. Prospective users should expect to experiment or contact the provider for integration guidance.
Capabilities
Use cases
- —Running sentiment analysis or text summarization without managing API keys or subscriptions
- —Fetching real-time crypto token quotes and gas estimates on a per-call payment basis
- —Geocoding addresses or validating data with zero upfront commitment
- —Exporting analytics data or generating reports via micropayment-gated endpoints
- —Generating embeddings for downstream ML pipelines
Fit
Best for
- —Developers wanting zero-commitment, pay-as-you-go API access
- —AI agents that can settle x402 payments autonomously on Base
- —Projects needing low-cost utility endpoints without rate limits
Not for
- —Teams requiring detailed API documentation and guaranteed SLAs before integration
- —High-throughput workloads where per-request on-chain settlement adds unacceptable latency
- —Users without a Base-compatible USDC wallet
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/wire/99 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-token>" \
-d '{}'Endpoint
Quality
The endpoint is live and returns a valid x402 challenge with clear pricing, but there is no OpenAPI spec, no request/response schema, and all documentation pages are empty beyond a wallet-connect prompt. The purpose of /api/v1/wire/99 specifically is undocumented; only the generic 'Premium API Access' label is available.
Warnings
- —No documentation available — /docs, /api, /pricing, and /README pages all show only 'Connect wallet' with no content.
- —No OpenAPI or schema definition found for any endpoint.
- —The specific purpose and input/output format of /api/v1/wire/99 ('Premium API Access') is unknown; it may be a generic or placeholder endpoint.
- —Many endpoints are listed on the landing page but none have documented request parameters or response schemas.
Citations
- —All endpoints are priced at $0.02 per request with no API keys, no rate limits, and instant access on Base network.https://lowpaymentfee.com
- —The x402 challenge for /api/v1/wire/99 requires up to 20,000 base units of USDC (asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) on Base with a 300-second timeout.https://lowpaymentfee.com/api/v1/wire/99
- —Available API categories include Data & Analytics, AI & Machine Learning, Finance & Web3, and Infrastructure.https://lowpaymentfee.com