x402-gated NFT data endpoint on Base, pay $0.02 per request in USDC.
What it does
This endpoint at `/api/v1/nfts/42` is part of the lowpaymentfee.com platform, a collection of x402-protocol pay-per-call 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/42`), though no detailed documentation or response schema is available beyond the x402 challenge and the site's landing page.
Payment is settled on the Base network using USDC (contract `0x8335…2913`) via the x402 "exact" scheme. The maximum amount required per call is 20,000 base units, which at 6 decimals equals $0.02 USD. The endpoint accepts POST requests, returns `application/json`, and requires no API keys or prior registration — callers simply attach an `X-PAYMENT` header with a valid x402 payment proof. The challenge timeout is 300 seconds.
The broader lowpaymentfee.com platform advertises uniform $0.02/request pricing across all endpoints, with no rate limits and no minimum commitments. However, the crawled documentation pages (`/api`, `/pricing`, `/README`) all resolve to a minimal "Connect wallet" page, so there is no detailed API documentation, request/response schemas, or usage examples available beyond what the x402 challenge itself provides.
Capabilities
Use cases
- —Fetching NFT data or metadata on demand with per-call USDC micropayments
- —Integrating NFT lookups into agent workflows without managing API keys
- —Programmatic access to NFT information settled on Base L2
Fit
Best for
- —Agents or bots that need keyless, pay-as-you-go NFT data access
- —Developers prototyping x402-based payment flows on Base
- —Low-volume consumers who want no subscription or rate-limit overhead
Not for
- —High-volume NFT indexing where per-call costs add up quickly
- —Users who need detailed API documentation or guaranteed SLAs
- —Anyone requiring non-USDC or non-Base payment settlement
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/nfts/42 \
-H "X-PAYMENT: <x402-payment-proof>" \
-H "Content-Type: application/json"Endpoint
Quality
The endpoint is live (402 challenge captured) and pricing is clear ($0.02 USDC on Base). However, there is no API documentation, no request/response schema, no examples, and the NFT-specific functionality is only inferred from the URL path. The crawled docs pages are all empty wallet-connect stubs.
Warnings
- —No API documentation available — /api, /pricing, and /README pages all return only a 'Connect wallet' stub.
- —No request body schema or response schema documented; functionality inferred solely from URL path '/api/v1/nfts/42'.
- —The specific data returned by this NFT endpoint is unknown; callers should test with a small payment first.
Citations
- —The endpoint returns a 402 challenge with x402Version 1, exact scheme, on Base network using USDC at max 20000 base units ($0.02).https://lowpaymentfee.com/api/v1/nfts/42
- —The platform advertises $0.02/request uniform pricing with no API keys, no rate limits, and instant access on Base network.https://lowpaymentfee.com
- —USDC contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 with 6 decimals.https://lowpaymentfee.com/api/v1/nfts/42