NFT metadata endpoint on Base, pay-per-call via x402 with USDC at $0.02/request.
What it does
This x402-enabled endpoint serves NFT metadata for token ID 14 at `https://lowpaymentfee.com/api/v1/nfts/14/metadata`. It is part of a broader suite of pay-per-request APIs offered by lowpaymentfee.com, spanning data analytics, AI/ML inference, finance/Web3, and infrastructure utilities. All endpoints on the platform share a uniform $0.02 per request pricing model, settled in USDC on the Base network.
The endpoint accepts POST requests and returns JSON (`application/json`). Payment is handled via the x402 protocol: callers attach an `X-PAYMENT` header containing a signed payment proof for 20,000 base units of USDC (0.02 USD, since USDC uses 6 decimals) to the payee address `0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3`. The payment timeout is 300 seconds. No API keys, rate limits, or upfront commitments are required — access is entirely pay-as-you-go.
The specific content returned by this NFT metadata endpoint is not documented in the crawled material. The platform advertises many other endpoints (sentiment analysis, text summarization, embeddings, price feeds, geocoding, etc.) all at the same $0.02 price point, but no OpenAPI schema, request/response examples, or detailed documentation were found for any of them. The `/api`, `/pricing`, and `/README` pages all returned only a "Connect wallet" prompt with no additional content.
Capabilities
Use cases
- —Retrieving on-chain NFT metadata for display in wallets or marketplaces
- —Programmatic access to NFT token attributes without running your own indexer
- —Agent-driven NFT data lookups with automatic micropayment settlement
Fit
Best for
- —Developers needing quick NFT metadata lookups without API key management
- —AI agents that can settle x402 payments autonomously on Base
- —Low-volume or sporadic NFT data consumers who prefer pay-per-call over subscriptions
Not for
- —High-volume NFT indexing where bulk data access or websocket streams are needed
- —Users who need metadata for arbitrary token IDs (this endpoint is scoped to token 14)
- —Anyone without a Base-compatible USDC wallet for payment
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/nfts/14/metadata \
-H "X-PAYMENT: <x402-payment-proof>" \
-H "Content-Type: application/json"Endpoint
Quality
The endpoint is live (402 challenge captured) and pricing is clear ($0.02 USDC on Base). However, there is no OpenAPI schema, no request/response examples, no documentation for the NFT metadata endpoint specifically, and the crawled pages beyond the homepage were empty. The actual data returned is unknown.
Warnings
- —No OpenAPI or schema documentation available for this endpoint
- —No request body or response body examples found anywhere in crawled material
- —The endpoint is scoped to a single NFT token ID (14); unclear if other token IDs are available at different paths
- —Platform documentation pages (/api, /pricing, /README) returned no useful content beyond 'Connect wallet'
Citations
- —The endpoint returns a 402 challenge requesting 20,000 base units of USDC on Base networkhttps://lowpaymentfee.com/api/v1/nfts/14/metadata
- —USDC asset address is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Basehttps://lowpaymentfee.com/api/v1/nfts/14/metadata
- —All APIs on the platform are priced at $0.02 per request with no API keys, no rate limits, and instant accesshttps://lowpaymentfee.com
- —The platform offers endpoints across Data & Analytics, AI & ML, Finance & Web3, and Infrastructure categorieshttps://lowpaymentfee.com