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 88 at `https://lowpaymentfee.com/api/v1/nfts/88/metadata`. It accepts POST requests and returns JSON. Payment is settled on the Base network using USDC (contract `0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913`) via the x402 "exact" scheme.
The price per request is 20,000 base units of USDC (6 decimals), which equals $0.02 USD — consistent with the provider's uniform $0.02/request pricing across all their endpoints. No API keys or rate limits are required; callers simply attach an `X-PAYMENT` header with a valid x402 payment proof. The endpoint has a maximum payment timeout of 300 seconds.
The provider, lowpaymentfee.com, hosts a broader catalog of pay-per-call APIs spanning data analytics, AI/ML inference (sentiment, summarization, classification, embeddings), finance/Web3 data (price feeds, exchange rates, gas estimates), and infrastructure utilities (geocoding, validation, conversion). All endpoints share the same $0.02 pricing and x402 payment model on Base. However, the specific endpoint listed here is scoped to NFT metadata retrieval for a single token ID. No OpenAPI schema, detailed documentation, or example responses were found in the crawl, so the exact structure of the returned metadata is unknown.
Capabilities
Use cases
- —Retrieving metadata for NFT token #88 programmatically
- —Integrating NFT display data into wallets or marketplaces
- —Agent-driven NFT metadata lookups with micropayments
Fit
Best for
- —Developers needing on-demand NFT metadata without API key management
- —AI agents that can settle x402 payments on Base
- —Low-volume or sporadic NFT metadata queries where per-call pricing is preferable
Not for
- —Bulk metadata retrieval across many token IDs (only token 88 is exposed at this URL)
- —Users who cannot settle USDC payments on the Base network
- —Applications requiring detailed documentation or guaranteed SLAs
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/nfts/88/metadata \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402_payment_proof>"Endpoint
Quality
The endpoint is live (402 challenge captured) and pricing is clear, but there is no OpenAPI schema, no documentation of request/response formats, and no example payloads. The endpoint is narrowly scoped to a single NFT token ID with no explanation of what metadata is returned.
Warnings
- —No OpenAPI or schema documentation available — response structure is unknown
- —Endpoint is specific to NFT token ID 88; unclear if other token IDs are available at similar paths
- —No crawled documentation beyond a landing page listing; /api, /pricing, and /README pages returned only a wallet-connect prompt
- —Provider catalog lists many endpoint categories but none mention NFTs, so this endpoint may be experimental or a demo
Citations
- —The endpoint returns HTTP 402 with an x402 challenge requiring USDC payment on Basehttps://lowpaymentfee.com/api/v1/nfts/88/metadata
- —USDC asset contract is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Basehttps://lowpaymentfee.com/api/v1/nfts/88/metadata
- —All endpoints on the platform are priced at $0.02 per request with no API keys or rate limitshttps://lowpaymentfee.com
- —The provider offers additional API categories including AI/ML, finance, data analytics, and infrastructurehttps://lowpaymentfee.com