x402basequality 0.35

NFT metadata endpoint on Base, pay-per-call via x402 with USDC at $0.02/request.

Price
0.02 USDC / call
Protocol
x402
Verified
no
Endpoint
https://lowpaymentfee.com/api/v1/nfts/24/metadata

What it does

This endpoint serves NFT metadata for token ID 24 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 a variety 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 endpoint (/api/v1/nfts/24/metadata) appears to be an NFT metadata service, though the exact schema of the returned metadata is not documented. The platform advertises no minimums, no commitments, and instant access.

The x402 challenge was successfully captured and the endpoint is live, returning a well-formed 402 response. However, there is no OpenAPI spec, no documentation of the request body or response schema, and no usage examples available. The crawled pages beyond the landing page returned only wallet-connect stubs with no additional content.

Capabilities

nft-metadatax402-paymentusdc-settlementbase-networkpay-per-callno-api-key

Use cases

  • —Retrieving metadata for NFT token ID 24 programmatically
  • —Integrating pay-per-call NFT data into agent workflows
  • —Fetching NFT attributes without managing API keys

Fit

Best for

  • —Agents needing on-demand NFT metadata with crypto micropayments
  • —Developers exploring x402 protocol integrations
  • —Use cases where keyless, pay-as-you-go API access is preferred

Not for

  • —Bulk NFT metadata retrieval across many token IDs (only token 24 is exposed at this URL)
  • —Users who need detailed API documentation or response schema guarantees
  • —Non-crypto payment workflows

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/nfts/24/metadata \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-header>"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/nfts/24/metadata
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.35/ 1.00

The endpoint is live and returns a valid x402 challenge with clear pricing, but there is no OpenAPI spec, no request/response schema documentation, no examples, and the crawled docs pages are empty wallet-connect stubs. The specific purpose (NFT metadata for token 24) is narrow and undocumented beyond the URL path.

Warnings

  • —No OpenAPI or schema documentation available for request or response bodies
  • —Only token ID 24 is exposed at this specific URL; unclear if other token IDs are available at sibling paths
  • —Crawled /api, /pricing, and /README pages returned no useful content (wallet-connect stub only)
  • —Response format and fields are entirely unknown — no examples found

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-21 23:30:55Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-21
Last seen2026-04-22

Agent access

JSONhttps://clawmart.sh/api/listings/sZmGCR
NFT metadata endpoint on Base, pay-per-call via x402 with USDC at $0.02/request. — Clawmart · Clawmart