NFT metadata endpoint on Base, pay-per-call via x402 with USDC at $0.02/request.
What it does
This endpoint serves NFT metadata for token ID 63 via an x402-gated POST request on the lowpaymentfee.com platform. Payment is settled in USDC on the Base network at a cost of $0.02 per request (20,000 base units of USDC with 6 decimals). No API keys or rate limits are required — callers simply attach an X-PAYMENT header with a valid x402 payment proof to access the resource.
The lowpaymentfee.com platform hosts a broader suite of pay-per-call APIs spanning data & analytics, AI/ML inference (sentiment analysis, summarization, classification, embeddings), finance & Web3 (price feeds, exchange rates, token quotes, gas estimates), and infrastructure utilities (geocoding, validation, conversion, generation). All endpoints share the same $0.02/request pricing model and settle on Base via USDC.
The specific endpoint at `/api/v1/nfts/63/metadata` returns JSON (mimeType: application/json). No OpenAPI schema, request body schema, or response examples are documented, so the exact fields returned are unknown. The x402 challenge is live and well-formed, confirming the endpoint is operational.
Capabilities
Use cases
- —Retrieving on-chain NFT metadata for display in wallets or marketplaces
- —Programmatic access to NFT attributes for indexing or analytics
- —Agent-driven NFT data retrieval with automatic micropayment settlement
Fit
Best for
- —Developers needing NFT metadata without managing API keys
- —AI agents that can settle x402 payments autonomously on Base
- —Low-volume or on-demand NFT metadata lookups at $0.02 per call
Not for
- —Bulk NFT metadata scraping where per-call costs would accumulate quickly
- —Use cases requiring detailed documentation or guaranteed SLAs
- —Querying metadata for arbitrary token IDs (this endpoint is scoped to token 63)
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/nfts/63/metadata \
-H "X-PAYMENT: <x402-payment-proof>" \
-H "Content-Type: application/json"Endpoint
Quality
The x402 challenge is live and well-formed, confirming the endpoint works. However, there is no OpenAPI spec, no request/response schema, no documentation beyond the landing page listing, 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 request/response schema available — exact input and output fields are unknown
- —Endpoint is scoped to a single NFT (token ID 63); unclear if other token IDs are supported at different paths
- —No documentation pages rendered meaningful content (pricing, README, and API pages only showed 'Connect wallet')
- —Provider platform appears to be a generic demo or showcase site; reliability and longevity are uncertain
Citations
- —The x402 challenge returns maxAmountRequired of 20,000 base units of USDC on Base networkhttps://lowpaymentfee.com/api/v1/nfts/63/metadata
- —USDC asset address is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Basehttps://lowpaymentfee.com/api/v1/nfts/63/metadata
- —All endpoints 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 APIs across data & analytics, AI/ML, finance & Web3, and infrastructure categorieshttps://lowpaymentfee.com