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, finance & Web3 data, and infrastructure utilities — all priced at $0.02 per request, settled in USDC on the Base network. No API keys, no rate limits, and no subscriptions are required; each call is paid individually via the x402 payment header.
The specific endpoint `/api/v1/wire/155` is listed as "Premium API Access" but its exact functionality is not documented beyond that label. The x402 challenge confirms it is live, accepts POST requests, and charges up to 20,000 base units of USDC (0.02 USD) per call on Base (asset contract 0x8335…2913). The response MIME type is application/json. However, no input schema, parameter documentation, or example responses are available for this particular route.
The broader lowpaymentfee.com platform advertises sibling endpoints for sentiment analysis, text summarization, classification, embeddings, price feeds, exchange rates, geocoding, validation, conversion, and data export — all at the same $0.02 price point. Documentation pages (/docs, /pricing, /README) returned only a "Connect wallet" prompt with no substantive content during crawl, so detailed usage instructions are unavailable.
Capabilities
Use cases
- —Accessing premium API functionality with per-request USDC micropayments on Base
- —Agent-driven API consumption without pre-registration or API keys
- —Programmatic pay-as-you-go access to data or utility services
Fit
Best for
- —Developers wanting zero-commitment, pay-per-call API access
- —AI agents that can settle x402 payments autonomously on Base
- —Users who prefer crypto micropayments over subscription billing
Not for
- —Users needing detailed documentation or guaranteed SLAs before purchasing
- —Anyone without a Base-compatible USDC wallet
- —High-volume consumers who need bulk pricing or rate-limit guarantees
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/wire/155 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-token>" \
-d '{}'Endpoint
Quality
The endpoint is live and returns a valid x402 challenge, but there is no documentation for what /api/v1/wire/155 actually does, no input/output schema, and no example responses. The docs, pricing, and README pages all returned only 'Connect wallet' with no content. The listing is essentially a stub with confirmed liveness and pricing.
Warnings
- —The exact functionality of /api/v1/wire/155 ('Premium API Access') is undocumented — it is unclear what data or service it provides.
- —All documentation pages (/docs, /pricing, /README) returned no substantive content during crawl.
- —No input parameters or output schema are documented for this endpoint.
- —The endpoint path '/api/v1/wire/155' does not match any of the named APIs listed on the homepage, suggesting it may be a generic or internal route.
Citations
- —The endpoint returns a 402 x402 challenge with maxAmountRequired of 20000 base units of USDC on Basehttps://lowpaymentfee.com/api/v1/wire/155
- —All APIs on the platform are priced at $0.02 per request with no API keys, no rate limits, and instant access on Base networkhttps://lowpaymentfee.com
- —The USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913https://lowpaymentfee.com/api/v1/wire/155