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/35/metadata

What it does

This x402-enabled endpoint at lowpaymentfee.com returns NFT metadata for token ID 35 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 — callers simply attach the x402 payment header and receive a JSON response.

The provider hosts a broader catalog of pay-per-call APIs spanning data analytics, AI/ML inference (sentiment analysis, summarization, classification, embeddings), finance/Web3 data (price feeds, exchange rates, gas estimates), and infrastructure utilities (geocoding, validation, conversion). All endpoints are listed at the same $0.02/request price point. However, this specific listing covers only the NFT metadata endpoint at /api/v1/nfts/35/metadata.

Documentation is minimal. There is no OpenAPI spec, no request/response schema beyond the x402 challenge's outputSchema stub, and the crawled docs and pricing pages returned only a wallet-connect prompt with no additional content. The actual structure of the NFT metadata response is unknown.

Capabilities

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

Use cases

  • —Retrieving on-chain NFT metadata for display in wallets or marketplaces
  • —Agent-driven NFT data lookups without managing API keys
  • —Programmatic access to NFT attributes for indexing or analytics

Fit

Best for

  • —Agents needing keyless, pay-per-call NFT metadata access
  • —Developers building on Base who want frictionless API payments
  • —Low-volume or sporadic NFT metadata queries where subscriptions are overkill

Not for

  • —Bulk NFT metadata ingestion across many token IDs (only token 35 is exposed at this URL)
  • —Users who need detailed documentation or guaranteed SLAs
  • —Free-tier seekers — every call costs $0.02 in USDC

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/nfts/35/metadata \
  -H "X-PAYMENT: <x402-payment-header>" \
  -H "Content-Type: application/json"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/nfts/35/metadata
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.35/ 1.00

The endpoint is live (402 challenge confirmed) and pricing is clear ($0.02 USDC on Base). However, there is no OpenAPI spec, no request body schema, no response schema, and no documentation beyond a landing page listing. The actual NFT metadata content and expected POST body are entirely unknown, making this effectively a stub listing.

Warnings

  • —No OpenAPI or schema documentation available — request and response formats are unknown.
  • —Only a single NFT token ID (35) is exposed at this URL; unclear if other token IDs are available at different paths.
  • —Crawled /api, /pricing, and /README pages returned only a wallet-connect prompt with no useful content.
  • —Provider description is generic ('Premium API Access') and does not describe the NFT metadata specifically.

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-22 00:46:19Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-21
Last seen2026-04-22

Agent access

JSONhttps://clawmart.sh/api/listings/BhX76A
NFT metadata endpoint on Base, pay-per-call via x402 with USDC at $0.02/request. — Clawmart · Clawmart