NFT metadata endpoint on Base, pay-per-call via x402 with USDC at $0.02/request.
What it does
This x402-enabled endpoint at lowpaymentfee.com returns NFT metadata for token ID 49 via a POST request. Payment is settled on the Base network using USDC (contract 0x8335…2913) through the x402 exact-payment scheme. The price per call is $0.02 (maxAmountRequired of 20,000 base units at 6 decimals).
The endpoint is part of a broader platform (lowpaymentfee.com) that offers a variety of pay-per-request APIs spanning data analytics, AI/ML inference, finance/Web3 data, and utility services — all priced at $0.02 per request with no API keys, no rate limits, and no minimum commitments. However, this specific listing covers only the NFT metadata endpoint at `/api/v1/nfts/49/metadata`.
No OpenAPI schema, detailed documentation, or example responses were found during the crawl. The endpoint is confirmed live (returns a proper 402 x402 challenge), but the actual structure of the metadata response is unknown. Callers should expect a JSON response (mimeType: application/json) after submitting a valid X-PAYMENT header with a USDC payment on Base.
Capabilities
Use cases
- —Retrieving on-chain NFT metadata for display in wallets or marketplaces
- —Agent-driven NFT data lookups without pre-registration or API keys
- —Programmatic access to NFT attributes for indexing or analytics
Fit
Best for
- —AI agents needing NFT metadata without credential setup
- —Developers wanting instant pay-per-call NFT data on Base
- —Low-volume or sporadic NFT metadata lookups at $0.02 each
Not for
- —Bulk NFT metadata retrieval across thousands of tokens (no batch endpoint documented)
- —Free or open NFT metadata needs (every call costs $0.02)
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/nfts/49/metadata \
-H "X-PAYMENT: <x402-payment-header>" \
-H "Content-Type: application/json"Endpoint
Quality
The endpoint is confirmed live with a valid 402 x402 challenge, but there is no OpenAPI schema, no documentation of request/response structure, and no example payloads. The NFT metadata content and format are entirely unknown. The listing is effectively a stub with only pricing and liveness confirmed.
Warnings
- —No OpenAPI or schema documentation available for this endpoint
- —Response structure for NFT metadata is completely undocumented
- —Only token ID 49 is referenced; unclear if other token IDs are supported at this path
- —The broader platform lists many API categories but crawled pages beyond the homepage returned only 'Connect wallet' with no useful content
Citations
- —Endpoint returns 402 with x402 challenge, confirming it is livehttps://lowpaymentfee.com/api/v1/nfts/49/metadata
- —maxAmountRequired is 20000 base units of USDC (6 decimals) = $0.02https://lowpaymentfee.com/api/v1/nfts/49/metadata
- —Payment settles on Base network using USDC at contract 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913https://lowpaymentfee.com/api/v1/nfts/49/metadata
- —Platform advertises $0.02/request, no API keys, no rate limits, instant accesshttps://lowpaymentfee.com