Crypto token data via x402 micropayment — $0.02 per request on Base network.
What it does
The `/api/v1/tokens/MASK` endpoint on lowpaymentfee.com returns token-level data (likely price, metadata, or market information) for the MASK token. It is part of a broader suite of pay-per-call APIs offered by lowpaymentfee.com spanning data analytics, AI/ML inference, finance/Web3, and infrastructure utilities. All endpoints are priced at $0.02 per request, settled in USDC on the Base network via the x402 protocol.
The endpoint is live and returns a standard x402 payment challenge (HTTP 402) requiring an `X-PAYMENT` header with a USDC payment of up to 20,000 base units (i.e., $0.02, since USDC uses 6 decimals). No API keys or rate limits are advertised — access is gated purely by micropayment. The payment is sent to address `0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3` using the USDC contract `0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913` on Base.
Documentation is extremely sparse. The crawled docs, API, pricing, and README pages all rendered only a "Connect wallet" prompt with no additional content. There is no OpenAPI schema, no request/response examples, and no description of what fields the token endpoint returns. The specific behavior of this endpoint (e.g., whether it returns price data, metadata, or on-chain analytics for MASK) must be inferred from the URL pattern and the site's Finance & Web3 category listing.
Capabilities
Use cases
- —Retrieve current data or quotes for the MASK token via a single micropayment call
- —Integrate token lookups into an agent workflow without API key management
- —Pay-per-use crypto data access for bots or automated trading pipelines
Fit
Best for
- —Agents needing on-demand token data without subscription commitments
- —Developers prototyping crypto dashboards with minimal setup
- —x402-compatible wallets or clients that can settle USDC on Base
Not for
- —High-frequency trading requiring sub-second latency and bulk data (no documented rate guarantees)
- —Users who need detailed API documentation or response schema before integrating
- —Non-crypto use cases unrelated to token data
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/tokens/MASK \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-header>"Endpoint
Quality
The endpoint is live and returns a valid x402 challenge, confirming pricing and payment details. However, there is no OpenAPI schema, no request/response examples, and the docs pages are empty (wallet-gated). The actual data returned by this endpoint is unknown, making it effectively a stub listing.
Warnings
- —No API documentation available — all doc pages render only a 'Connect wallet' prompt with no content.
- —No request or response schema provided; the data returned by /api/v1/tokens/MASK is unknown.
- —The endpoint's specific functionality (price feed, metadata, analytics) is inferred from URL pattern only.
- —No OpenAPI spec or ai-plugin manifest found.
Citations
- —All endpoints priced at $0.02 per request with no API keys, no rate limits, and instant access on Base network.https://lowpaymentfee.com
- —x402 challenge returns maxAmountRequired of 20000 base units in USDC (6 decimals = $0.02) on Base network.https://lowpaymentfee.com/api/v1/tokens/MASK
- —USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913.https://lowpaymentfee.com/api/v1/tokens/MASK
- —Site offers APIs across Data & Analytics, AI & ML, Finance & Web3, and Infrastructure categories.https://lowpaymentfee.com