x402-gated premium API access on Base, pay $0.02 per request in USDC — no API keys required.
What it does
This endpoint at lowpaymentfee.com is part of a broader platform offering pay-per-request APIs across data analytics, AI/ML inference, finance/Web3, and infrastructure utilities. The specific endpoint `/api/v1/nfts/61` is listed as "Premium API Access" and is gated via the x402 protocol on the Base network. Payment is settled in USDC (contract 0x8335…2913) at a cost of $0.02 per request (20,000 base units with 6 decimals). The platform advertises no API keys, no rate limits, and instant access.
The platform hosts multiple endpoint categories: Data & Analytics (metrics, reports, data export, insights), AI & Machine Learning (sentiment analysis, text summarization, classification, embeddings), Finance & Web3 (price feeds, exchange rates, token quotes, gas estimates), and Infrastructure (geocoding, validation, conversion, generation). All endpoints appear to share the same $0.02/request pricing model.
However, the specific functionality of `/api/v1/nfts/61` is not documented beyond the generic "Premium API Access" label. There is no OpenAPI schema, no request/response examples, and no detailed documentation available from the crawled pages. The endpoint is confirmed live via a valid 402 challenge, but what data or service it actually returns when paid is unknown from the available material.
Capabilities
Use cases
- —Accessing NFT-related data or metadata via a single paid request
- —Agent-driven API consumption without pre-registration or API key management
- —Micropayment-gated data retrieval on Base L2
Fit
Best for
- —Developers or agents wanting keyless, pay-per-use API access
- —Web3-native applications that can settle USDC on Base
- —Scenarios requiring low-friction, no-commitment API calls
Not for
- —Users needing detailed documentation or guaranteed SLAs before integrating
- —High-volume use cases where per-request pricing may add up versus subscription models
- —Anyone unable to transact in USDC on the Base network
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/nfts/61 \
-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 documentation on what /api/v1/nfts/61 actually returns, no OpenAPI schema, no request/response examples, and the crawled pages beyond the homepage are empty wallet-connect stubs. The specific endpoint purpose is essentially unknown.
Warnings
- —No documentation exists for the /api/v1/nfts/61 endpoint beyond the generic label 'Premium API Access'
- —No OpenAPI or schema available — request body and response format are completely unknown
- —The /api, /pricing, and /README pages returned no useful content (just 'Connect wallet')
- —The 'nft' path segment suggests NFT-related data but this is inferred, not confirmed
Citations
- —The endpoint returns a 402 challenge with maxAmountRequired of 20000 in USDC on Base networkhttps://lowpaymentfee.com/api/v1/nfts/61
- —All endpoints are priced at $0.02 per request with no API keys, no rate limits, and instant accesshttps://lowpaymentfee.com
- —USDC asset contract is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Basehttps://lowpaymentfee.com/api/v1/nfts/61
- —Platform offers endpoints across Data & Analytics, AI & ML, Finance & Web3, and Infrastructure categorieshttps://lowpaymentfee.com