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 81 on the lowpaymentfee.com platform. It is part of a broader suite of pay-per-request APIs offered by the same provider, spanning data analytics, AI/ML inference, finance/Web3, and infrastructure utilities. All endpoints use the x402 payment protocol, settling in USDC on the Base network.
The specific endpoint at `/api/v1/nfts/81/metadata` accepts POST requests and returns JSON. The x402 challenge advertises a maximum cost of 20,000 base units of USDC (0x8335…2913 on Base), which equals $0.02 per request (USDC uses 6 decimals). No API keys or rate limits are advertised; access is granted purely through the x402 payment header. The payment timeout is 300 seconds.
The provider's landing page lists a uniform $0.02/request price across all endpoints and emphasizes a no-commitment, no-minimum model. Documentation beyond the landing page is sparse — the /api, /pricing, and /README routes all resolve to a wallet-connect prompt with no additional technical detail. There is no OpenAPI spec, no request/response schema documentation, and no example payloads available, so the actual structure of the NFT metadata response is unknown.
Capabilities
Use cases
- —Retrieving metadata for NFT token #81 programmatically
- —Integrating NFT display data into a dApp or marketplace
- —Agents that need on-demand NFT metadata without API key management
Fit
Best for
- —Developers needing keyless, pay-per-call NFT metadata access
- —AI agents with x402-compatible wallets on Base
- —Quick one-off metadata lookups without subscription overhead
Not for
- —Bulk retrieval of metadata for large NFT collections (no batch endpoint documented)
- —Users who need detailed API documentation or OpenAPI specs before integrating
- —Free-tier or non-crypto payment workflows
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/nfts/81/metadata \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402_payment_token>"Endpoint
Quality
The endpoint is live and returns a valid x402 challenge with clear pricing, but there is no OpenAPI spec, no request/response schema, no example payloads, and no documentation beyond a marketing landing page. The actual content of the NFT metadata response is completely unknown.
Warnings
- —No OpenAPI or schema documentation available — request and response formats are unknown.
- —The /api, /pricing, and /README pages all return only a wallet-connect prompt with no useful content.
- —The specific NFT collection and what metadata fields are returned are undocumented.
- —This endpoint is for a single token ID (81); it is unclear how to query other token IDs.
Citations
- —The x402 challenge advertises maxAmountRequired of 20000 base units of USDC on Base (asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913), equaling $0.02 per request.https://lowpaymentfee.com/api/v1/nfts/81/metadata
- —The provider lists uniform $0.02/request pricing with no API keys, no rate limits, and no minimums across all endpoints.https://lowpaymentfee.com
- —The endpoint accepts POST requests and returns application/json as declared in the x402 challenge.https://lowpaymentfee.com/api/v1/nfts/81/metadata