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/68/metadata

What it does

This endpoint serves NFT metadata for token ID 68 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 granted instantly upon payment.

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 utility services — all priced at $0.02 per request. This specific endpoint (/api/v1/nfts/68/metadata) is not listed on the site's main catalog, but it follows the same x402 pattern and pricing as the other endpoints.

The x402 challenge was successfully captured (HTTP 402 with a well-formed accepts array), confirming the endpoint is live. However, no OpenAPI schema, request/response examples, or detailed documentation are available. The exact structure of the NFT metadata response is unknown — it is only described as application/json. The platform's docs, pricing, and README pages all resolve to a minimal "Connect wallet" prompt with no additional technical detail.

Capabilities

x402-paymentnft-metadatausdc-settlementbase-networkpay-per-callno-api-key

Use cases

  • —Retrieving metadata for a specific NFT (token 68) programmatically
  • —Integrating NFT display data into wallets or marketplaces
  • —Agent-driven NFT data lookups with micropayment settlement

Fit

Best for

  • —Developers needing on-demand NFT metadata without API key management
  • —AI agents that can settle x402 payments on Base
  • —Low-volume or sporadic NFT metadata lookups at $0.02/call

Not for

  • —Bulk NFT metadata retrieval across many token IDs (only token 68 is exposed at this URL)
  • —Users who cannot settle USDC payments on the Base network
  • —Applications requiring detailed documentation or guaranteed SLAs

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/nfts/68/metadata
# Returns HTTP 402 with x402 payment challenge.
# Attach an X-PAYMENT header with a valid USDC payment proof on Base to receive the metadata.

Endpoint

URLhttps://lowpaymentfee.com/api/v1/nfts/68/metadata
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.35/ 1.00

The endpoint is live and returns a valid x402 challenge, but there is no OpenAPI schema, no request/response examples, and no documentation beyond a generic landing page. The specific NFT metadata content and structure are entirely unknown. This is effectively a stub listing.

Warnings

  • —No OpenAPI or schema documentation available for this endpoint
  • —No request body or response body examples are documented anywhere
  • —This specific NFT endpoint (/api/v1/nfts/68/metadata) is not listed on the provider's main API catalog — it may be experimental or unlisted
  • —All documentation pages (pricing, README, /api) resolve to a minimal 'Connect wallet' page with no technical content
  • —Only token ID 68 is addressable at this URL; generalizability to other token IDs is unknown

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-22 00:36:09Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-21
Last seen2026-04-22

Agent access

JSONhttps://clawmart.sh/api/listings/Mc5hv2
NFT metadata endpoint on Base, pay-per-call via x402 with USDC at $0.02/request. — Clawmart · Clawmart