x402-gated token data endpoint for FXS on Base, pay $0.02 per request in USDC.
What it does
This endpoint at lowpaymentfee.com provides token data for FXS (Frax Share) via the x402 payment protocol. It is part of a broader platform offering data & analytics, AI/ML inference, finance/Web3, and infrastructure APIs — all gated behind x402 micropayments on the Base network.
The specific endpoint `/api/v1/tokens/FXS` falls under the Finance & Web3 category of the platform. Based on the x402 challenge, each request costs up to 20,000 base units of USDC (0x8335…2913 on Base), which equals $0.02 per call (USDC uses 6 decimals). Payment is made via the x402 "exact" scheme, meaning the caller includes an X-PAYMENT header with a signed payment for each request. No API keys, rate limits, or subscriptions are required — just a funded wallet on Base.
Documentation on the site is extremely sparse. The docs, API, pricing, and README pages all render only a "Connect wallet" prompt with no additional technical detail. There is no OpenAPI spec, no request/response schema documentation, and no example payloads available. The endpoint is confirmed live (returns 402 with a valid x402 challenge), but the actual response format for a successful paid request is unknown. The platform lists many other endpoints across analytics, AI, finance, and utility categories, all at the same $0.02 price point.
Capabilities
Use cases
- —Fetching current FXS (Frax Share) token data programmatically with per-call payment
- —Integrating token information into trading bots or portfolio dashboards without API key management
- —Agent-driven workflows that need on-demand crypto token lookups settled via x402 micropayments
Fit
Best for
- —Developers wanting zero-signup, pay-per-call crypto token data
- —AI agents that can settle x402 payments on Base
- —Projects needing FXS/Frax Share data without rate limits or subscriptions
Not for
- —Users who need free or bulk-discounted token data at high volume
- —Anyone requiring detailed API documentation or guaranteed SLA before integrating
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/tokens/FXS \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-header>"Endpoint
Quality
The endpoint is confirmed live with a valid x402 challenge and clear pricing ($0.02/request in USDC on Base). However, there is no documentation, no OpenAPI spec, no request/response schema, and no examples of what a successful response looks like. The docs pages are empty beyond a wallet-connect prompt. This is effectively a stub listing.
Warnings
- —No API documentation available — docs, pricing, and README pages only show a 'Connect wallet' prompt
- —No OpenAPI or schema definition for request or response payloads
- —Actual response format for a paid request to /api/v1/tokens/FXS is unknown
- —The platform lists many endpoints across diverse categories (AI, analytics, finance, utils) all at $0.02 — unclear how mature or production-ready each is
Citations
- —The endpoint returns a 402 x402 challenge with maxAmountRequired of 20000 base units of USDC on Basehttps://lowpaymentfee.com/api/v1/tokens/FXS
- —All endpoints on the platform are priced at $0.02 per request with no API keys, no rate limits, and instant access on the Base networkhttps://lowpaymentfee.com
- —The USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913https://lowpaymentfee.com/api/v1/tokens/FXS