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 8 via the x402 payment protocol on the Base network. It accepts POST requests and returns JSON. Payment is settled in USDC (contract 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) on Base, with a maximum amount of 20,000 base units — equivalent to $0.02 per request (USDC uses 6 decimals). No API keys or rate limits are required; access is gated entirely by the x402 micropayment challenge.
The endpoint is part of a broader platform at lowpaymentfee.com that offers dozens of pay-per-call APIs spanning data analytics, AI/ML inference, finance/Web3 data, and infrastructure utilities — all priced at $0.02 per request. This specific route (/api/v1/nfts/8/metadata) appears to be an NFT metadata service, though the exact schema of the returned metadata (e.g., name, image, attributes) is not documented. The platform advertises no minimums, no commitments, and instant access.
The x402 challenge was successfully captured with version 1, confirming the endpoint is live. The payment recipient is 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3 with a 300-second timeout. No OpenAPI spec, detailed documentation, or example responses were found in the crawl.
Capabilities
Use cases
- —Retrieving NFT metadata (name, image, attributes) for token ID 8 programmatically
- —Integrating pay-per-call NFT data into agent workflows without API key management
- —Demonstrating x402 micropayment protocol usage on Base
Fit
Best for
- —Agents or apps needing on-demand NFT metadata without subscription overhead
- —Developers experimenting with x402 payment-gated APIs
- —Low-volume, pay-as-you-go NFT data retrieval
Not for
- —Bulk NFT metadata fetching across many token IDs (only token 8 is exposed at this route)
- —Use cases requiring detailed documentation or guaranteed SLAs
- —Free or open metadata access without crypto payment capability
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/nfts/8/metadata \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-header>"Endpoint
Quality
The endpoint is live (402 challenge captured) and pricing is clear ($0.02 USDC on Base), but there is no OpenAPI spec, no documented request/response schema, no example payloads, and the crawled pages beyond the landing page returned only 'Connect wallet' with no useful content. The specific NFT metadata content is entirely unknown.
Warnings
- —No OpenAPI or schema documentation available — response format is unknown
- —Only token ID 8 is exposed at this specific route; unclear if other token IDs are available at similar paths
- —No example responses found; actual metadata content is unverified
- —Crawled /api, /pricing, and /README pages returned no useful content
Citations
- —The endpoint returns a 402 challenge with x402 version 1, accepting USDC on Base with maxAmountRequired of 20000 base unitshttps://lowpaymentfee.com/api/v1/nfts/8/metadata
- —USDC asset contract is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Basehttps://lowpaymentfee.com/api/v1/nfts/8/metadata
- —Platform advertises $0.02/request pricing with no API keys, no rate limits, and instant accesshttps://lowpaymentfee.com
- —Payment recipient address is 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3 with 300-second timeouthttps://lowpaymentfee.com/api/v1/nfts/8/metadata