x402-gated NFT data endpoint on Base, pay $0.02 per request in USDC.
What it does
This endpoint at `/api/v1/nfts/23` is part of the lowpaymentfee.com platform, a collection of x402-protocol pay-per-request APIs spanning data analytics, AI/ML inference, finance/Web3, and infrastructure utilities. The specific resource appears to serve NFT-related data (inferred from the URL path `/nfts/23`), though the provider's landing page does not explicitly list this particular endpoint among its advertised routes. The endpoint is live and returns a valid x402 challenge.
Payment is settled on the Base network using USDC (contract `0x8335…2913`) via the "exact" scheme. The `maxAmountRequired` is 20,000 base units, which at 6 decimals equals $0.02 per request. No API keys or rate limits are advertised; access is granted purely through the x402 payment header. The response MIME type is `application/json` and the endpoint accepts HTTP POST.
The platform advertises a uniform $0.02/request pricing model across all its endpoints. Documentation is extremely thin — the landing page lists endpoints with one-line descriptions and prices, but there is no OpenAPI spec, no request/response schema documentation, and no usage examples. The `/api`, `/pricing`, and `/README` pages all resolve to a minimal "Connect wallet" prompt with no additional content. Because the NFT endpoint is not listed on the homepage, its exact functionality and response schema are unknown.
Capabilities
Use cases
- —Fetching NFT metadata or details for token ID 23 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 Base L2 with USDC
Fit
Best for
- —Developers wanting keyless, pay-per-request NFT data access
- —AI agents that can settle x402 payments on Base
- —Prototyping Web3 data integrations with minimal setup
Not for
- —Bulk NFT data retrieval at scale (no documented batch endpoints or rate-limit info)
- —Users who need detailed API documentation or guaranteed SLAs
- —Non-crypto users who cannot settle USDC payments on Base
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/nfts/23 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-header>"Endpoint
Quality
The endpoint is live and returns a valid x402 challenge with clear pricing, but there is no OpenAPI spec, no documented request/response schema, no examples, and the specific /nfts/23 endpoint is not even listed on the provider's landing page. Functionality must be entirely inferred from the URL path.
Warnings
- —The /api/v1/nfts/23 endpoint is not listed among the provider's advertised APIs on the landing page — its purpose and response format are unknown.
- —No OpenAPI spec, request schema, or response schema is available anywhere on the site.
- —The /api, /pricing, and /README pages contain no useful documentation (only a 'Connect wallet' prompt).
- —Exact functionality of this endpoint is speculative based solely on the URL path.
Citations
- —The endpoint returns a valid x402 challenge with maxAmountRequired of 20000 base units in USDC on Basehttps://lowpaymentfee.com/api/v1/nfts/23
- —The platform advertises $0.02/request pricing with no API keys, no rate limits, and instant access on Base networkhttps://lowpaymentfee.com
- —USDC asset contract is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Basehttps://lowpaymentfee.com/api/v1/nfts/23
- —The /api, /pricing, and /README pages resolve to minimal 'Connect wallet' contenthttps://lowpaymentfee.com/api