Pay-per-call API platform on Base (USDC) covering data, AI, finance, and utility endpoints at $0.02/request.
What it does
lowpaymentfee.com is an x402-enabled API platform that offers a broad catalog of endpoints spanning data & analytics, AI & machine learning, finance & Web3, and infrastructure utilities. Every endpoint is priced at $0.02 per request, paid in USDC on the Base network via the x402 payment protocol. There are no API keys, no rate limits, and no minimum commitments — callers simply attach an X-PAYMENT header to each request.
The specific endpoint at `/api/v1/wire/160` is listed as "Premium API Access" and returns a 402 challenge requesting up to 20,000 base units of USDC (0x8335…) on Base, which equals $0.02 (USDC uses 6 decimals). The challenge specifies an exact payment scheme with a 300-second timeout. The endpoint accepts HTTP POST and returns application/json.
Documentation beyond the landing page is extremely sparse — the /docs, /pricing, /api, 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/160` endpoint actually returns. The platform advertises categories like sentiment analysis, text summarization, embeddings, geocoding, price feeds, and more, but without documentation it is unclear what specific functionality the `wire/160` route provides.
Capabilities
Use cases
- —Accessing data analytics and reports via per-request micropayments
- —Running AI inference (sentiment, summarization, classification, embeddings) without API keys
- —Fetching financial data like token quotes, exchange rates, and gas estimates
- —Using utility services like geocoding, validation, and conversion
Fit
Best for
- —Developers who want keyless, pay-as-you-go API access
- —Agents and bots that can settle x402 payments in USDC on Base
- —Users who prefer no-commitment, no-rate-limit API consumption
Not for
- —Users who need detailed API documentation or OpenAPI specs before integrating
- —Applications requiring high-volume bulk access at discounted rates
- —Developers without a Base-compatible USDC wallet
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/wire/160 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-token>"Endpoint
Quality
The endpoint is live and returns a valid x402 402 challenge, but there is zero documentation on what /api/v1/wire/160 actually does or returns. No OpenAPI spec, no request/response schemas, and all doc pages render only 'Connect wallet'. The listing is effectively a stub with confirmed pricing and liveness but no functional detail.
Warnings
- —No documentation available — /docs, /pricing, /api, and /README all show only 'Connect wallet'
- —No OpenAPI or schema describing request parameters or response format for /api/v1/wire/160
- —The purpose of the specific 'wire/160' endpoint is unknown; 'Premium API Access' is a generic label
- —The platform lists many endpoint categories but none have documented schemas or examples
Citations
- —Endpoint returns a 402 challenge requesting up to 20,000 base units of USDC on Base (= $0.02)https://lowpaymentfee.com/api/v1/wire/160
- —Platform advertises $0.02/request pricing with no API keys, no rate limits, and instant access on Base networkhttps://lowpaymentfee.com
- —USDC asset address is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Basehttps://lowpaymentfee.com/api/v1/wire/160
- —Categories include Data & Analytics, AI & Machine Learning, Finance & Web3, and Infrastructurehttps://lowpaymentfee.com