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 34 via a pay-per-request x402 protocol on the Base network. It accepts POST requests and returns JSON. Payment is settled in USDC (contract 0x8335…2913 on Base) at a maximum cost of $0.02 per call (20,000 base units with 6 decimals). No API keys, rate limits, or subscriptions are required — each request is individually paid via the X-PAYMENT header.
The endpoint is part of a broader platform at lowpaymentfee.com that offers dozens of x402-gated 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 on the platform share the same $0.02/request pricing model.
The specific content returned by this NFT metadata endpoint is not documented beyond the generic "Premium API Access" label. There is no OpenAPI spec, no request/response schema, and no example payloads available from the crawled material. The endpoint is confirmed live (returns a valid 402 challenge), but the actual data shape of a successful response is unknown.
Capabilities
Use cases
- —Retrieving on-chain NFT metadata for token ID 34 without managing API keys
- —Programmatic access to NFT data with micropayment settlement on Base
- —Agent-driven NFT metadata lookups paid per-call in USDC
Fit
Best for
- —Agents or scripts that need NFT metadata with zero-setup authentication
- —Developers wanting pay-as-you-go access without subscriptions
- —Web3 applications that already hold USDC on Base
Not for
- —Bulk retrieval of metadata across many NFT collections (only serves token 34)
- —Users who need detailed documentation or response schema guarantees before integrating
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/nfts/34/metadata \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-token>"Endpoint
Quality
The endpoint is confirmed live with a valid 402 challenge and clear pricing, but there is no OpenAPI spec, no request/response schema, no documentation of what the NFT metadata actually contains, and the crawled pages beyond the homepage returned only 'Connect wallet' stubs. This is effectively a stub listing.
Warnings
- —No OpenAPI or schema documentation available for this endpoint
- —Response payload structure is completely unknown — no examples or field descriptions
- —Endpoint is scoped to a single NFT token ID (34); unclear if other IDs are supported at different paths
- —The platform pages (/api, /pricing, /README) returned no useful content beyond a wallet-connect prompt
Citations
- —Endpoint returns a 402 challenge with x402Version 1, accepting USDC on Base with maxAmountRequired of 20000 base unitshttps://lowpaymentfee.com/api/v1/nfts/34/metadata
- —USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913https://lowpaymentfee.com/api/v1/nfts/34/metadata
- —Platform advertises $0.02/request pricing with no API keys, no rate limits, and instant access on Base networkhttps://lowpaymentfee.com