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/2/metadata

What it does

This x402-enabled endpoint at lowpaymentfee.com returns NFT metadata for token ID 2 via a POST request. Payment is settled on the Base network using USDC (contract 0x8335…2913) through the x402 exact-payment scheme. The maximum amount required per call is 20,000 base units of USDC, which equals $0.02 (USDC uses 6 decimals). No API keys or rate limits are advertised; access is granted instantly upon valid payment.

The provider operates a broader platform offering multiple pay-per-call API categories including data & analytics, AI/ML inference (sentiment analysis, summarization, classification, embeddings), finance & Web3 (price feeds, exchange rates, token quotes, gas estimates), and infrastructure utilities (geocoding, validation, conversion, generation). All listed endpoints share the same $0.02/request pricing model on the Base network.

The specific endpoint probed (/api/v1/nfts/2/metadata) is live and returns a proper 402 challenge. However, no OpenAPI schema, request/response examples, or detailed documentation were found. The response MIME type is advertised as application/json, and the method is POST. Beyond the generic "Premium API Access" description, there is no documentation explaining what fields the NFT metadata response contains or what request body (if any) is expected.

Capabilities

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

Use cases

  • —Retrieving on-chain or off-chain metadata for a specific NFT
  • —Integrating NFT display data into wallets or marketplaces
  • —Agent-driven NFT data lookups with automatic micropayment

Fit

Best for

  • —Developers needing quick NFT metadata without API key management
  • —AI agents that can settle x402 payments on Base
  • —Low-volume or sporadic NFT metadata queries at $0.02 each

Not for

  • —Bulk NFT metadata retrieval across many token IDs (no batch endpoint documented)
  • —Users who need detailed documentation or guaranteed SLA before integrating

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/nfts/2/metadata
# Returns 402 with x402 challenge; attach X-PAYMENT header with valid USDC payment on Base to receive metadata.

Endpoint

URLhttps://lowpaymentfee.com/api/v1/nfts/2/metadata
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.35/ 1.00

The endpoint is live and returns a valid 402 challenge, but there is no OpenAPI schema, no request/response examples, and no documentation beyond a generic title. The actual NFT metadata content and expected request body are unknown, making this effectively a stub listing.

Warnings

  • —No OpenAPI or schema documentation available for this endpoint
  • —No example request or response bodies documented; unclear what fields are returned
  • —The endpoint is specific to NFT token ID 2; it is unclear whether other token IDs are supported or how to discover them
  • —Provider landing page lists many API categories but none have detailed docs beyond titles and prices

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-21 23:37:33Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-21
Last seen2026-04-22

Agent access

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