Pay-per-call token data API for SOL on Base via x402 — $0.02/request, no API keys.
What it does
This endpoint at lowpaymentfee.com provides token data for SOL (Solana) via a simple POST request, paid per-call using the x402 protocol. Payment is settled in USDC on the Base network at $0.02 per request (maxAmountRequired of 20,000 base units with 6 decimals). No API keys, accounts, or rate limits are required — callers simply attach an X-PAYMENT header with a valid x402 payment proof.
The endpoint is part of a broader suite of APIs offered by lowpaymentfee.com spanning data & analytics, AI/ML inference (sentiment, summarization, classification, embeddings), finance & Web3 (price feeds, exchange rates, token quotes, gas estimates), and infrastructure utilities (geocoding, validation, conversion, generation). All endpoints on the platform share the same $0.02/request pricing model and x402 payment flow on Base.
The specific `/api/v1/tokens/SOL` endpoint likely returns token-level data for Solana (SOL), though the exact response schema is not documented. No OpenAPI spec, detailed docs, or example responses were found in the crawl — the docs, pricing, and API pages all render only a "Connect wallet" prompt with no additional content. The endpoint is confirmed live via a valid 402 challenge.
Capabilities
Use cases
- —Fetching current SOL token data (price, metadata) without managing API keys
- —Agent-driven crypto portfolio monitoring with per-call micropayments
- —Integrating SOL market data into automated trading or analytics pipelines
Fit
Best for
- —AI agents needing on-demand SOL token data with no subscription
- —Developers who want zero-setup crypto data access via x402
- —Micropayment-friendly workflows where per-request billing is preferred
Not for
- —High-volume bulk data ingestion where per-call costs add up quickly
- —Users who need detailed historical SOL data or OHLCV candles (not documented)
- —Anyone requiring comprehensive API documentation or SLA guarantees
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/tokens/SOL \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-proof>"Endpoint
Quality
The endpoint is confirmed live via a valid x402 402 challenge, and pricing is clear ($0.02/request in USDC on Base). However, there is no OpenAPI spec, no documented request/response schema, no example payloads, and the docs/pricing/API pages are all empty beyond a wallet connect prompt. The actual data returned by /api/v1/tokens/SOL is entirely unknown.
Warnings
- —No OpenAPI or schema documentation available — response format is unknown
- —Docs, pricing, and API pages render only 'Connect wallet' with no usable content
- —Exact fields returned for SOL token data are undocumented and must be discovered empirically
- —The broader platform lists many endpoints but none appear to have public documentation
Citations
- —Endpoint returns 402 with x402 challenge, maxAmountRequired 20000 in USDC on Base networkhttps://lowpaymentfee.com/api/v1/tokens/SOL
- —All endpoints priced at $0.02/request with no API keys, no rate limits, instant access on Base networkhttps://lowpaymentfee.com
- —USDC asset address 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Basehttps://lowpaymentfee.com/api/v1/tokens/SOL