Pay-per-call Solana token quote via x402 on Base, $0.02 per request in USDC.
What it does
This endpoint at lowpaymentfee.com provides Solana (SOL) token quotes through the x402 payment protocol. Each request costs $0.02 in USDC on the Base network — no API keys, no rate limits, and no subscriptions required. The endpoint accepts POST requests and returns JSON.
The provider operates a broader suite of pay-per-call APIs spanning crypto/finance data (token quotes, gas estimates, exchange rates, price feeds), AI/ML inference (sentiment analysis, text summarization, classification, embeddings), data analytics (metrics, reports, insights, data export), and infrastructure utilities (geocoding, validation, conversion, generation). All endpoints are priced uniformly at $0.02 per request and settle via USDC on the Base L2 network using the x402 exact-payment scheme.
Documentation is extremely sparse — the /docs, /pricing, /api, and /README pages all render only a "Connect wallet" prompt with no further technical detail. There is no OpenAPI spec, no request/response schema documentation, and no example payloads available. The endpoint is confirmed live (returns a valid 402 x402 challenge), but the actual response format for a paid request is unknown.
Capabilities
Use cases
- —Fetching real-time Solana token price quotes for trading bots or dashboards
- —Integrating SOL price data into DeFi applications without managing API keys
- —Agent-driven portfolio tracking that pays per query with USDC on Base
Fit
Best for
- —Developers wanting zero-signup crypto price data
- —AI agents that can settle micropayments via x402
- —Applications needing on-demand SOL quotes without rate limits
Not for
- —Users needing detailed historical OHLCV candle data (no evidence this is supported)
- —Applications requiring documented, stable response schemas with SLA guarantees
- —High-volume consumers who would benefit from bulk pricing or subscriptions
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/crypto/quotes/sol \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-token>"Endpoint
Quality
The endpoint is confirmed live with a valid x402 402 challenge and clear pricing ($0.02 USDC on Base). However, there is no OpenAPI spec, no request/response schema, and all documentation pages are empty stubs showing only 'Connect wallet'. The actual data returned upon successful payment is completely undocumented.
Warnings
- —No documentation available — /docs, /pricing, /api, and /README pages all show only 'Connect wallet' with no technical content.
- —No request or response schema is published; the output format of a successful paid call is unknown.
- —No OpenAPI specification or example payloads are available.
- —The breadth of advertised APIs (AI, analytics, finance, utilities all at $0.02) with zero documentation raises questions about data quality and provenance.
Citations
- —Endpoint returns a valid x402 challenge with maxAmountRequired of 20000 base units (USDC, 6 decimals = $0.02) on Base networkhttps://lowpaymentfee.com/api/v1/crypto/quotes/sol
- —All APIs priced at $0.02 per request with no API keys, no rate limits, and instant access on Base networkhttps://lowpaymentfee.com
- —Token Quotes endpoint listed under Finance & Web3 category at /api/v1/crypto/quoteshttps://lowpaymentfee.com
- —USDC asset address 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Basehttps://lowpaymentfee.com/api/v1/crypto/quotes/sol