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-call APIs spanning data & analytics, AI/ML inference (sentiment analysis, summarization, classification, embeddings), finance & Web3 (price feeds, exchange rates, token quotes, gas estimates), and infrastructure utilities (geocoding, validation, conversion, generation). Each request costs $0.02 in USDC on the Base network, with no API keys, no rate limits, and no minimum commitments required.
The specific endpoint `/api/v1/wire/195` is listed as "Premium API Access" and accepts HTTP POST requests. Payment is settled on-chain via USDC (contract 0x8335…2913) on Base, using the x402 exact-payment scheme. The maximum amount required per call is 20,000 base units of USDC (6 decimals), which equals $0.02. The payment recipient address is 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3, and the endpoint allows up to 300 seconds for payment timeout.
Documentation is extremely sparse — the docs, pricing, API, and README pages all render only a "Connect wallet" prompt with no additional content. There is no OpenAPI schema, no request/response examples, and no description of what the `/api/v1/wire/195` endpoint specifically returns. The site's landing page lists many endpoints but does not clarify what "wire/195" does beyond the generic label "Premium API Access." Without documentation or example payloads, it is unclear what data or functionality this particular endpoint provides.
Capabilities
Use cases
- —Accessing premium API endpoints without traditional API key registration
- —Making one-off paid API calls settled in USDC on Base
- —Agent-driven programmatic access to paid services via x402 protocol
Fit
Best for
- —Developers who want keyless, pay-as-you-go API access
- —AI agents that can settle x402 payments on Base
- —Users who prefer on-chain micropayments over subscription billing
Not for
- —Users who need detailed API documentation or OpenAPI specs before integrating
- —High-volume use cases where $0.02/request adds up significantly
- —Anyone without a Base-compatible USDC wallet
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/wire/195 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-token>" \
-d '{}'Endpoint
Quality
The endpoint is live (returns 402 with a valid x402 challenge), but there is virtually no documentation: no OpenAPI schema, no request/response examples, and no explanation of what /api/v1/wire/195 specifically does. The docs, pricing, and README pages are all empty beyond a wallet-connect prompt. The listing is effectively a stub.
Warnings
- —No documentation available — docs, pricing, API, and README pages all show only 'Connect wallet'
- —No OpenAPI or JSON schema describing request parameters or response format
- —The specific purpose of /api/v1/wire/195 ('Premium API Access') is not explained anywhere
- —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/195
- —All APIs on the site cost $0.02 per request with no API keys, no rate limits, and instant access on Base networkhttps://lowpaymentfee.com
- —USDC asset contract is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Basehttps://lowpaymentfee.com/api/v1/wire/195