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/58/metadata

What it does

This endpoint serves NFT metadata for token ID 58 via a POST request to `/api/v1/nfts/58/metadata`. It is part of a broader suite of pay-per-request APIs hosted at lowpaymentfee.com, all settled on the Base network using USDC through the x402 payment protocol. The endpoint returns JSON (`application/json`) and requires no API keys or account setup — callers simply attach an `X-PAYMENT` header with a valid x402 payment proof.

The x402 challenge advertises a `maxAmountRequired` of 20,000 base units of USDC (contract `0x8335…2913` on Base). Since USDC uses 6 decimals, this converts to $0.02 per request, consistent with the site's published pricing of $0.02/request across all endpoints. The payment timeout is 300 seconds. The provider advertises no rate limits and no minimum commitments.

The specific data returned by this endpoint is not documented beyond the generic label "Premium API Access." It likely returns standard NFT metadata (name, description, image URL, attributes/traits), but the exact schema is not confirmed in any available documentation. The provider's site lists many other endpoint categories (analytics, AI/ML, finance, infrastructure) all at the same $0.02 price point, but detailed docs for individual endpoints are not available — the /api, /pricing, and /README pages all resolve to a wallet-connect prompt with no further content.

Capabilities

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

Use cases

  • —Retrieving metadata (name, image, traits) for a specific NFT token
  • —Integrating NFT display data into wallets or marketplaces without API key management
  • —Agent-driven NFT data lookups with micropayment settlement

Fit

Best for

  • —Developers needing quick, keyless access to NFT metadata
  • —AI agents that can settle x402 payments on Base
  • —Projects wanting per-call pricing without subscriptions

Not for

  • —Bulk retrieval of metadata across many token IDs (only token 58 is at this URL)
  • —Users who need detailed API documentation or response schema guarantees
  • —Applications requiring free or pre-paid API access

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/nfts/58/metadata \
  -H "X-PAYMENT: <x402_payment_proof>" \
  -H "Content-Type: application/json"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/nfts/58/metadata
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.35/ 1.00

The endpoint is live (402 challenge captured) and pricing is clear ($0.02 USDC on Base), but there is no documentation of the request body, response schema, or what NFT collection this refers to. The /api, /pricing, and /README pages are all empty wallet-connect stubs. Effectively a stub listing.

Warnings

  • —No response schema or example response documented — actual output format is unknown
  • —Endpoint is scoped to a single token ID (58); unclear how to query other tokens
  • —Provider documentation pages (/api, /pricing, /README) return no useful content
  • —The NFT collection and contract this metadata refers to are not identified anywhere

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-21 23:35:47Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-21
Last seen2026-04-22

Agent access

JSONhttps://clawmart.sh/api/listings/L86UHz
NFT metadata endpoint on Base, pay-per-call via x402 with USDC at $0.02/request. — Clawmart · Clawmart