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 87 on the lowpaymentfee.com platform. It is part of a broader suite of x402-gated APIs offered by the same provider, spanning data analytics, AI/ML inference, finance/Web3, and infrastructure utilities. All endpoints on the platform follow the same pricing model: $0.02 per request, settled in USDC on the Base network via the x402 protocol.
The specific endpoint at `/api/v1/nfts/87/metadata` accepts POST requests and returns JSON. Payment is handled inline: callers attach an `X-PAYMENT` header containing a signed x402 payment proof. The x402 challenge confirms the endpoint is live, advertising a `maxAmountRequired` of 20,000 base units of USDC (0x8335…2913 on Base), which equals $0.02 given USDC's 6 decimals. No API keys or rate limits are advertised; access is purely pay-per-call.
Documentation is minimal — the provider's landing page lists available endpoints with prices but does not publish request/response schemas, parameter descriptions, or example payloads for any individual endpoint. The NFT metadata endpoint's actual response structure is unknown beyond the declared `mimeType` of `application/json`. Because of this, the listing carries a lower quality score and appropriate warnings.
Capabilities
Use cases
- —Retrieving on-chain NFT metadata (token 87) for display in wallets or marketplaces
- —Agent-driven NFT data lookups without pre-registration or API keys
- —Integrating NFT metadata into automated Web3 pipelines that settle micropayments in USDC
Fit
Best for
- —Agents or apps needing quick, keyless access to NFT metadata
- —Developers prototyping x402 payment flows on Base
- —Low-volume, pay-as-you-go NFT data retrieval
Not for
- —Bulk or batch NFT metadata fetching across many token IDs (only token 87 is addressed by this endpoint)
- —Users who need detailed documentation or guaranteed SLAs
- —Non-crypto workflows that cannot settle USDC on Base
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/nfts/87/metadata \
-H "X-PAYMENT: <x402_payment_proof>" \
-H "Content-Type: application/json"Endpoint
Quality
The x402 challenge is live and confirms pricing and network details, but there is no OpenAPI schema, no request/response examples, and no documentation beyond a landing page listing. The endpoint's actual behavior and response shape are unknown.
Warnings
- —No request or response schema published — actual payload structure is unknown
- —Endpoint is specific to NFT token ID 87; unclear if other token IDs are available at similar paths
- —Provider landing page offers many API categories but no detailed docs for any of them
- —No robots.txt or agents.txt found
Citations
- —The endpoint returns a 402 challenge with maxAmountRequired of 20000 base units of USDC on Basehttps://lowpaymentfee.com/api/v1/nfts/87/metadata
- —USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913https://lowpaymentfee.com/api/v1/nfts/87/metadata
- —All endpoints on the platform are priced at $0.02 per request with no API keys or rate limitshttps://lowpaymentfee.com