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 86 via a pay-per-request x402 protocol on the Base network. The caller sends a POST request with an X-PAYMENT header containing a USDC payment proof, and receives JSON metadata in return. The payment is settled on-chain using USDC (contract 0x8335…2913) on Base.
The endpoint is part of a broader API platform at lowpaymentfee.com that offers dozens of endpoints across data analytics, AI/ML inference, finance/Web3, and infrastructure utilities — all priced at $0.02 per request. The platform advertises no API keys, no rate limits, and instant access; payment is the only authentication mechanism. The x402 challenge confirms the endpoint is live, accepting the "exact" payment scheme with a max amount of 20,000 base units of USDC (6 decimals → $0.02).
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 accepts POST requests and returns application/json. Because the endpoint path includes a specific NFT ID (86), it likely returns metadata (name, description, image, attributes) for that particular token, but this is inferred rather than confirmed.
Capabilities
Use cases
- —Retrieving NFT metadata (name, image, attributes) for token ID 86 programmatically
- —Demonstrating x402 pay-per-call integration on Base with USDC
- —Building NFT display UIs that fetch metadata on demand
Fit
Best for
- —Agents or apps needing NFT metadata with no API key signup
- —Developers experimenting with x402 micropayment protocol
- —Low-friction, pay-as-you-go NFT data retrieval
Not for
- —Bulk retrieval of metadata across many NFT collections (single token ID only)
- —Use cases requiring free or subscription-based access
- —Applications needing detailed request/response documentation upfront
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/nfts/86/metadata \
-H "X-PAYMENT: <x402-payment-proof>" \
-H "Content-Type: application/json"Endpoint
Quality
The endpoint is confirmed live via a valid 402 challenge, and pricing is clear ($0.02 USDC on Base). However, there is no OpenAPI spec, no request body schema, no response schema, and no example payloads. The endpoint serves a single hardcoded NFT ID with no documentation on what metadata fields are returned. Effectively a stub listing.
Warnings
- —No OpenAPI or schema documentation available for this endpoint
- —No example request or response bodies documented
- —Endpoint is scoped to a single NFT token ID (86); unclear if other IDs are supported at different paths
- —The broader platform lists many endpoints but none have detailed docs in the crawled material
Citations
- —The endpoint returns HTTP 402 with an x402 challenge advertising USDC payment on Base at 20,000 base units ($0.02)https://lowpaymentfee.com/api/v1/nfts/86/metadata
- —The platform prices all endpoints at $0.02 per request with no API keys, no rate limits, and instant accesshttps://lowpaymentfee.com
- —USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913https://lowpaymentfee.com/api/v1/nfts/86/metadata