x402-gated NFT endpoint on Base, pay $0.02 per request in USDC — no API keys required.
What it does
This endpoint at `/api/v1/nfts/77` is part of the lowpaymentfee.com platform, a collection of x402-protocol pay-per-call APIs settled in USDC on the Base network. The specific resource appears to serve NFT-related data (resource path `/nfts/77`), though the exact response payload is not documented beyond the generic label "Premium API Access" and a stated MIME type of `application/json`.
The endpoint is live and returns a valid x402 challenge (HTTP 402) requesting an exact-scheme payment of 20,000 base units of USDC (0x8335…2913 on Base). Since USDC uses 6 decimals, this translates to $0.02 per request — consistent with the site-wide flat pricing of $0.02/request advertised on the landing page. Payment is sent to `0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3` with a maximum timeout of 300 seconds. No API keys, rate limits, or upfront commitments are required; access is granted purely through the x402 payment header.
The broader lowpaymentfee.com platform advertises endpoints across data/analytics, AI/ML (sentiment, summarization, classification, embeddings), finance/Web3 (price feeds, exchange rates, token quotes, gas estimates), and infrastructure utilities (geocoding, validation, conversion, generation). However, this specific listing covers only the `/api/v1/nfts/77` resource. Documentation is minimal — there is no OpenAPI spec, no request/response schema beyond `application/json`, and no description of what fields the NFT endpoint returns.
Capabilities
Use cases
- —Fetching NFT metadata or details for token ID 77 via a single paid request
- —Integrating pay-per-call NFT data into an agent workflow without managing API keys
- —Programmatic access to NFT information settled on-chain via USDC on Base
Fit
Best for
- —Agents or bots that need keyless, on-demand NFT data access
- —Developers experimenting with x402 payment protocol integrations
- —Low-volume consumers who prefer pay-per-request over subscriptions
Not for
- —High-volume NFT data consumers who need bulk or streaming access
- —Users who need detailed documentation or guaranteed SLAs
- —Anyone without a Base-compatible USDC wallet
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/nfts/77 \
-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 documentation of what the NFT endpoint actually returns, and the crawled pages beyond the landing page are empty wallet-connect stubs. The listing is effectively a stub with confirmed liveness.
Warnings
- —No OpenAPI or schema documentation available — request and response formats are unknown.
- —The endpoint description is a generic label ('Premium API Access') with no NFT-specific details.
- —No examples of successful responses are available; actual data returned is unverified.
- —The broader site's /api, /pricing, and /README pages returned only 'Connect wallet' with no useful content.
Citations
- —The endpoint returns a valid x402 challenge with maxAmountRequired of 20000 base units of USDC on Basehttps://lowpaymentfee.com/api/v1/nfts/77
- —USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913https://lowpaymentfee.com/api/v1/nfts/77
- —Site-wide pricing is $0.02 per request with no API keys, no rate limits, and instant access on Base networkhttps://lowpaymentfee.com
- —Payment recipient address is 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3 with maxTimeoutSeconds of 300https://lowpaymentfee.com/api/v1/nfts/77