Token data for RSR via x402 micropayment on Base — $0.02 per request, no API key needed.
What it does
This endpoint at lowpaymentfee.com provides token-level data for RSR (Reserve Rights) as part of a broader suite of finance, crypto, AI, and utility APIs. The entire platform operates on the x402 payment protocol, settling in USDC on the Base network. Each request costs $0.02 (20,000 base units of USDC with 6 decimals), and there are no API keys, rate limits, or subscription commitments — you pay per call via an X-PAYMENT header.
The specific endpoint `/api/v1/tokens/RSR` sits alongside other crypto and finance endpoints such as `/api/v1/crypto/quotes`, `/api/v1/finance/prices`, and `/api/v1/finance/rates`. Based on the URL pattern, it likely returns token-specific data for the RSR token (price, metadata, or market information), though the exact response schema is not documented. The platform also offers AI/ML endpoints (sentiment analysis, summarization, classification, embeddings), data analytics, and utility services, all at the same $0.02 per-request price point.
The endpoint is confirmed live, returning a proper 402 challenge with x402 version 1. Payment is settled to address `0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3` using USDC (`0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913`) on Base. Documentation beyond the landing page is essentially empty (docs, pricing, and API pages all just show a "Connect wallet" prompt), so the exact request/response format must be inferred.
Capabilities
Use cases
- —Fetching current RSR token data (price, metadata) for portfolio tracking
- —Programmatic access to RSR market information for trading bots
- —Agent-driven crypto data retrieval with per-call micropayments
- —Integrating RSR token info into dashboards without managing API keys
Fit
Best for
- —Agents or bots that need on-demand RSR token data without subscription overhead
- —Developers who want keyless, pay-per-use crypto data endpoints
- —x402-compatible clients settling micropayments in USDC on Base
Not for
- —High-frequency trading requiring sub-second latency guarantees (no SLA documented)
- —Users needing comprehensive historical token data or OHLCV candles (not documented)
- —Anyone without a Base-compatible USDC wallet for x402 payments
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/tokens/RSR \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402_payment_header>"Endpoint
Quality
The endpoint is confirmed live with a valid x402 402 challenge, and pricing is clear ($0.02/request in USDC on Base). However, there is no documentation of request parameters, response schema, or example payloads — the docs/pricing/API pages are all blank beyond a wallet-connect prompt. The exact data returned for the RSR token endpoint is unknown.
Warnings
- —No documentation available — docs, pricing, and API pages all render only a 'Connect wallet' prompt with no content.
- —No OpenAPI or output schema provided; request and response formats are entirely undocumented.
- —The specific data returned by /api/v1/tokens/RSR is inferred from URL pattern only; actual response structure is unknown.
- —This endpoint is not listed on the provider's landing page (which shows /api/v1/crypto/quotes but not /api/v1/tokens/RSR), so it may be an unlisted or experimental route.
Citations
- —The endpoint returns a 402 challenge with x402 version 1, accepting USDC on Base network with maxAmountRequired of 20000 base unitshttps://lowpaymentfee.com/api/v1/tokens/RSR
- —USDC asset address is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Basehttps://lowpaymentfee.com/api/v1/tokens/RSR
- —Platform pricing is $0.02 per request with no API keys, no rate limits, and instant access on Base networkhttps://lowpaymentfee.com
- —The landing page lists crypto endpoints like /api/v1/crypto/quotes and /api/v1/finance/prices but does not list /api/v1/tokens/RSRhttps://lowpaymentfee.com